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1. l HITACHI Service Manual Inspire the Next 10 2 Thermistor e Thermistors for the outdoor unit RASC 10HRNE I 9 e 89 n 4 J 3 i a I 30 Aje OF Ly G a Y Kj J nemi j Sm RASC 3 5 HVRNE q e f e H Number Identification 1 Thermistor for discharge gas temperature Thermistor for outdoor ambient temperature Oo Thermistor for evaporating temperature 10 245 SMGBO0043 rev 1 04 2010 HITACHI eee Inspire the Next Service Manual Thermistor for upper part temperature of compressor For prevention of discharge gas overheating a Athermistor for the upper part temperature of the compressor is installed to prevent discharge gas from overheating If discharge gas temperature increases excessively lubricating oil deterioration occurs and lubricating properties deteriorate resulting in short compressor life b If discharge gas temperature increases excessively compressor temperature increases At the worst compressor motor winding will be burnt out c When the upper part temperature of compressor increases during heating operation the unit is controlled according to the following method An elec
2. Oo ES a ened Qd1 Gap a Beine d1 Gap a 0 08 0 1 0 33 0 09 0 1 0 39 96 35 26 5 6 922 22 922 42 40 0 08 0 0 07 0 09 0 0 11 0 08 0 1 0 35 0 12 0 1 0 42 99 53 99 7 8 925 4 925 6 12 0 08 0 0 09 0 12 0 0 08 0 08 0 1 0 38 0 12 0 1 0 42 912 7 912 9 8 28 58 928 78 12 0 08 0 0 19 0 12 0 0 08 0 09 0 1 0 41 0 12 0 1 0 47 15 88 916 1 8 931 75 932 0 12 0 09 0 0 13 0 12 0 0 13 0 09 0 1 0 44 0 12 0 1 0 52 19 05 919 3 10 938 1 938 3 14 0 09 0 0 16 0 12 0 0 18 A basic brazing method is shown below Pre heat the outer tube for better flowing of the filler metal Heat inner side tube evenly Rubber plug Packless valve High pressure hose 0 03 to 0 05 MPa 0 3 to 0 5 Kg cm G Reducer valve open this valve only when the gas is needed Nitrogen gas flow 0 05m3 h or smaller 32 SMGBO0043 rev 1 04 2010 Piping installation Service Manual HITACHI Inspire the Next A CAUTION Risk of explosion Can cause serious injuries and generate poisonous gases Use nitrogen gas for blowing during pipe brazing Do not use oxygen acetylene or fluorocarbon gas Use a reducer valve when nitrogen gas blowing is performed during brazing The gas pressure should be maintained within 0 03 to 0 05 MPa Do not charge OXYGEN ACETYLENE or other flammable and poisonous gases into the refrigerant because an
3. 70 44 3 Beating operation eid rrr Ir tives ncteradhasbepaqacesisucndersdcntanazessesaseesaveescasizeasibeceesiete 72 4 4 4 Defrost operation control ccccccceecce cee eeeecee cece eeeceeaaeeeeseseaaeceececcaeaeeeeeeeaaaeeeeeesesaeaeeeeseeeeaeeeesesenseeeees 74 4 5 Standard control functions ceci sceieice siue ne ik dde seed EE E EEEE 75 4 5 1 Freezing protection during cooling process or dry operation ssse m 75 4 5 2 Prevention control for excessively high discharge gas temperature seeeeeee 76 4 5 3 Outdoor unit electrical expansion valve control enne 77 4 5 4 Activation of protection device control ssesssessssses eene nennen nnn nnns n nnne nennen nn nnn 78 4 5 5 Outdoor Unit fan control during cooling operation esen emen 79 4 5 6 Outdoor unit fan control during heating operation sesseen emen 80 4 5 7 Preheating control of compressor ccccececceceeeeeeeee cece eeeaaeeeececeaaeaeceeseeaaaeceeeeeaaeeeeeeseeeeaeeeeseeeceeeeees 81 4 5 8 Prevention control for high pressure increase ssssssssssssssssssseseneenenenerer eren nnne 81 63 SMGBO0043 rev 1 04 2010 H ITACHI Control system Inspire the Next Service Manual 4 1 Device control system Control subject Purpose Cooling operation Heating operation Defrost operation
4. a uonisod uowes id au sajoojpu m uow sur a S MT LJ 95 O E 5 7 TA d d Hoy H sd NHL LOL SE R 3NEHOL OSYN ws E ot Ca ST 1 MSY epon amp MSQ i85 id ERRL 1 j v E vasa eso Hi ae Ll a BRE Herm essary cles 3NBH01 9SVM 3 1 is 2 Be Cus E amp L HI gmsa_ emsa msa emsa zmsa msa iapow Imsa 2037 eod Bues 01903 uoq s dig jo uonsog BUES xog jonuog 0919913 ausa B8 B 5 Yun oSve ui spog ouise j jo psodsiq mad pio las So FO 09 BB o BEDS UE on ES Bog UG SI0j38UUG JO UORDSOU1 S4 yNO 7359 nan ui X AZSQ n m id HSd m n fi UN WHL QOO 0 UNI I INO OEN 733 4 SL 5 ZNO 90ZNO innt dy X35 id 40 LOS I S4 M t NO ONOd AN v9 A 991 WHL f Oo osseo JOTSRUUSu ENHL CLNOdisu ET su s ET me sie Sez id sososazoio ELEL cdod burg oee BAHI BNOd BNOd DiN2d NOd ZNOd SNOd 6NO SINO PINO Ue Jooping osm ZAHI i JSunojSUpi 3i poog Duus aL E SAIDA PIOUSOS AS E E k ZVAS 5 ON 7 S5 BI om a va wa E OTS SAIDA BUEGSASW WAS E nan LL HOd UO oy Bae a iG ij 5 E 82d UO MSa A wh E He 1938 IMSY ink u 5 act ih 8 i m dg 9wsa ez ewsa z vwsa 9 7 i i y gM SMSI aa rs MSd ZMSd LMSd EJ s TION o io o emsa 9 ypwsad gt Jiwsa a ILH naa 5n E 4 i D D Jew uj JooR N so ZNO LNO ZNO VSNO 6WHISWHI ZAHI SNO LINO ZNOd n yojsoliuey jouueju t OLI czolo foz10
5. SS1 SS2 Power supply Cool ee X2 X1 O 3 E 2 1 X2 3P connector cable Heating S1 Fixing operation mode switch SS2 Changeover switch X2 Cooling X1 Heating Demand thermo OFF 3 This is an input function to control the maximum power that the compressor can consume When this option is turned on the outdoor units are stopped completely and the indoor units go into THERMO OFF Alarm 10 is displayed on the remote control If the switch of this function is disconnected it becomes available again Connect the cabling and use the materials as shown in section Avaliable ports Forced stoppage i This is an input function that turns on when the switch receives a signal that causes the compressor and the fan motor of the indoor unit to stop alarm 10 displays on a remote controlled when this option turns on If the switch of this function is disconnected it becomes available again Connect the cabling and use the materials as shown in section Avaliable ports Current control demand 5 A 1 This is an input function that turns on when it detects that the frequency of the compressor reaches 50 75 or 100 The frequency of the compressor is determined when the maximum current reaches the established limit Connect the cabling and use the materials as shown in section Avaliable ports If the running current of the outdoor unit exceeds the maximum limit the unit changes to the
6. No Description Remarks 82 Fan Partition Assy 83 Motor Base 84 Clamp 85 Spacer 86 Push Spacer 87 Bracket 88 Acoustical Cover 2 89 Fan Stay Assy Assembly 90 L Base 91 Suspension Base SMGBO0043 rev 1 04 2010 HITACHI Inspire the Next HITACHI canes Inspire the Next Service Manual 8 2 RASC 10HRNE 8 2 1 Cabinet and Fan Drawing N EPN200809 208 SMGBO0043 rev 1 04 2010 Spare parts Service Manual No Description Remarks 1 Terminal Board 2 Cord PS PSH Pressure Switch High 3 Harness PS PSC Pressure Switch Control 4 Fuse 40A 5 Electrical Wiring Diagram Assembly Components Harness Steel Plates 6 Capacitor 4700uF 7 Thermistor TA 8 Thermistor TD 9 Thermistor TE 10 Noise Filter 11 Noise Filter 12 Transistor M For Inverter 13 Diode M For Inverter 14 Exp Valve Unit 14 1 EXPV Coil 14 2 Exp Valve 14 3 Strainer 14 4 Exp Valve Cord 15 S Valve 1 1 Gas Line 16 S Valve 1 2 Liquid Line 17 Check JA 18 Dist Strainer 19 Strainer 20 Strainer 21 V P Rubber 2 22 V P Rubber 1 23 Inlet Protector Net Inlet 24 Outlet Protector Net Oulet 25 Fan Motor Unit Assembly 26 Fan Unit Feet 27 Fan Motor DC 1500W 6P Fan Casing Runner 28 Capil
7. G Indication of unit sr toppage cause d 1 22 lt 4 hours lt 2 hours Temp on the top of comp 50 C 30 C 40 C lt 30 C Temp on the top of comp Test Run Hot start protection is activated after 2 hours or 30 C 1 1 1 1 1 1 1 1 1 1 1 i 1 Standard operation Hot start protection is activated i after 4 hours or 40 C 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 MD ON for unit with drain pump y A Power to MC me 2 4 hours 2 40 C 2 2 hours 2 30 C Temp lt Ta 20 C on the top of comp 2 Ta 20 C r p Power to YH2 ON gt Power to EHW ON I U Fan Operation Low Higher than Set LU Air Tempossc Outd RS Power to DRY operation iciake temp Temp R vs2C ON Lower than set yiemp Power to MC OFF Power to MIF OFF 4 34 Outdoor Fan MOF operation on Yes L U fan operation low to 1 i 70 SMGBO0043 rev 1 04 2010 Control system HITACHI Service Manual Inspire the Next L U Indoor unit O U Outdoor unit gt Start of AUTO LOUVER ora Pressin 1 MEME D UU GUSA i lul a I uxD a HL Gu iu iiu 7 only for air pane AUTO LOUVER switch gt Aitematlidy or ind
8. 22 25 30 33 Outdoor temp C O NOTE Change of defrost operation conditions This function allows to change the operation conditions in defrosting mode The change is shown in the following illustrations Temperature Normal defrosting condition conditions under defrost operation When change of defrost condition is NOT set Outdoor evaporator Defrosting operation temperature C stop area Pipe 10 5 L rid ae f 0 5 i 10 15 T T H t Defrosting operation start area Fixing of frequency No setting for this function is available Cool draft protection 1 This function can be activated when the minimum discharge Air temperature falls down to 8 C in cooling operation Outdoor fan stop and compressor frequency forcibly declines to prevent discharge air temperature from dropping e Cool draft protection 2 The maximum rotation rotating speed is always 100 for the standard unit No limitation of the outdoor temperature Temperature conditions under defrost operation When change of defrost condition is set Optional defrosting condition Outdoor evaporator temperature C Pipe 15 10 5 fi fi j Defrosting operation stop area Outdoor temperature C Defrosting operation start area This function can be activated when the minimum discharge Air temperatur
9. 7 NOTE This alarm code is indicated when the outdoor unit protective device is activated by high discharge pressure during heating operation Accordingly when this alarm code is indicated there is high possibility of high pressure switch actuation and the above troubleshooting actions are based on such cases 167 SMGBO0043 rev 1 04 2010 H ITACHI Troubleshooting Inspire the Next Service Manual Alarm code Description Lt 171 Activation to protect system from excessively low suction pressure protection from vacuum operation The RUN LED flickers and ALARM is displayed on the remote control switch The unit number the alarm code and the unit code are alternately displayed on the set temperature section The unit number and the alarm code are displayed on the display of the outdoor unit PCB Inthe case that the evaporating temperature Cooling liquid refrigerant piping temp of indoor unit heating evaporating temp of outdoor unit is lower than 37 C 250 350 kQ and the thermistor on top of compressor is higher than 90 C for 3 minutes retry operation is performed 3 minutes after compressor stoppage However when the state occurs more than 3 times including 3 in one hour this alarm code is indicated Is the thermistor THM8 of No outdoor unit connected to Connect it PCB1 Yes No Is the thermistor THM3 of indoor unit connected t
10. 45 SMGB0043 rev 1 04 2010 HITACHI Inspire the Next 3 Correct position of twin distributor This is the correct position of twin branch pipe Up a Main Pipe Greater Refrigerant th n 7 gt gt Ti i Er Main direction Branch pipe pipe Refrigerant direction Down This is wrong position Up in pi Main pipe M Main pipe Mel PIP f J Refrigerant y M direction ecce Branch Branch Branch pipe XJ pipe pipe Down 4 Correct position of quad distributor Install the header horizontally Gas piping Liquid piping H a 3e i e Tightening flare nuts Pipe size Tightening torque N m 6 35 mm 20 9 53 mm 40 12 70 mm 60 15 88 mm 80 19 05 mm 100 e Brazing work Piping installation Service Manual A WARNING Explosion risk Can cause serious injury Use nitrogen gas for blowing during pipe brazing Do not use oxygen acetylene or fluorocarbon gas Use a reducer valve when nitrogen gas blowing is performed during brazing The gas pressure should be maintained within 0 03 to 0 05 Mpa Do not apply excessively high pressure to a pipe 7 NOTE This will cause bad influence to the compressor Alot of oxidation film will occur inside of tubes if no nitrogen gas blowing is performed during brazing work This film will be flecked off after operation and will circulate in the cycle r
11. Gt Plug of check joint only charging hose can be connected Tighten the cap with the indicated torque oa Piping installation Service Manual Allen wrench Cap tighten with the indicated torque Closing screw Spindle valve Flare tighten with the indicated torque Refrigerant pressure Fig b Refrigerant For opening eee 5 e oo and closing the 7 P i F spindle valve EA indicate v4 torque Closing screw ay V Spindle valve O Ring rubber Plug of check joint only charging Flange tighten hose can be the bolts with connected indicated torque Tighten the cap with the indicated torque NE jy Field Supplied pipe A CAUTION Damage to devices Unit failure At the test run fully open the spindle valve O NOTE not provided Do not apply force to the spindle valve at the end of opening 5 N m or smaller The back seat construction is 38 SMGB0043 rev 1 04 2010 Piping installation Service Manual HITACHI Inspire the Next 2 4 2 Flange piping connection only for RASC 10HRNE Confirm that the valve is closed Prepare a field supplied bend pipe for liquid line Connect it to the liquid valve by flare nut through the square hole of bottom base Factory supplied f pipe flange with 1 P silencer 27 78 238 Field supplied pipe 925 4ID 1
12. To finish checking press the PSW2 switch for more than 3 seconds Forced thermo OFF zd Only for simultaneous twin triple quad types Forced thermo OFF During compressor pre heating ni nu Thermo OFF during energy saving operation mode nu A Cancelation of Forced Thermo OFF Turn ON the power source and wait for more than 30 seconds Then press PSW1 and PSW3 simultaneously for more than 3 seconds Forced thermo OFF indoor unit error code 22 will be cancelled However this function may damage the compressor use only on inevitable occasion In case of using the remote control switch PC P1HE the cancellation is also available with it When operation is limited indication flashes on the remote control LCD press FAN SPEED and LOUVER switches simultaneously for more than 3 seconds Operation is limited indication is disappeared and operation is available 183 SMGBO0043 rev 1 04 2010 HITACHI Inspire the Next 7 2 5 Cause of inverter stoppage Troubleshooting Service Manual Code Cause Cause of stoppage for corresponding unit Remark Indication z Alarm code during retry Automatic stoppage of transistor module IPM ISPM dipIPM Error Over current decrease voltage short circuit protection 4 Li d ENT DUK Instantaneous over current Abnormal inverter fin thermistor 4 4 x lt A E ra Li
13. ssssseeseeeeeeeeenn enne errem nennen nnns 78 4 5 5 Outdoor Unit fan control during cooling operation emen 79 4 5 6 Outdoor unit fan control during heating operation ssssee eee 80 4 5 7 Preheating control of compressor cccccececceceeeecceeeeeeeeeceeaeceeceseceaeeeececqceeeeeeseceaaeeeeeesesaeaeeeeseeeeseeeess 81 4 5 8 Prevention control for high pressure increase sssssssssssssssssseseseen ener enne nennen nnne 81 5 Available optional functions sssssssssssssssssssssssssseeeeen nennen enne nnne 83 5 1 RASC 3 710 H V RNE Unifs rto ertet ette pac Ip ree e Rhone e e eo a ee ernie ee 84 SEM MEE AU I io eg K 84 MP EMO 0 0 6 0 lio e RM 86 5 1 3 Description of optional input signals sss enne nennen nnne nennt 88 5 1 4 Description of optional output signals sseseenee eee nnennnrneenenrrennennes 89 x EMO SB ci 89 5 1 6 Outdoor units available optional functions esesseeeeeneeen menm nennen nennen 94 8 SMGBO0043 rev 1 04 2010 Contents HITACHI Service Manual Inspire the Next 5 2 Available optional functions through the remote control switch PC ART sssssss 95 O 5 2 1 Optional f rictlon Settiligi icone riot reete nee a aasa ERE eR EB esu u BRE LE PRESA DE Fun 95 5 2 2 Optiona
14. T Factory supplied accesory Prepare a field supplied pipe for gas line Solder it and the factory supplied pipe flange at the outside of the unit Connect the pipe flange to gas valve with the factory supplied gasket through the square hole of Bottom Base Do not use the gasket that had been attached to the unit Nut x2 P Washer x2 S Flange Remove Pipe flange i Bolts x2 39 SMGBO0043 rev 1 04 2010 Piping installation H ITACHI Service Manual Inspire the Next 2 5 Piping and refrigerant charge 2 5 1 General process 1 Prepare locally supplied copper pipes 2 Select the piping size with the correct thickness and correct material which must have sufficient pressure strength 3 Select clean copper pipes Make sure there is no dust and moisture inside Blow the inside of the pipes with oxygen free nitrogen to remove any dust and foreign materials before connecting pipes 4 After connecting the refrigerant piping seal the open space between knockout hole and refrigerant pipes by using insulation material as shown below Insulation material Field Supplied TE refrigerant pipe Unit side Insulation material Insulation material NOTE Asystem with no moisture or oil contamination will give maximum performance and life cycle compared to a poorly prepared
15. 4 Wait for 2 or 3 minutes and measure the voltage once 29 again Check to ensure that no voltage is charged R e Inverter module checking procedure hc Internal circuit of rectified part of DIP IPM O Non faulty if 1 8 are checked and satisfied Measure T with 1 kO range of a tester 52C 7 NOTE 7 9n C EE 2 fey T DO NOT use a digital tester Te l D l DM1 E TN 2 SB 1 Touch of the tester to DIP IPM 52C terminal and i 2 r bn S to DIP IPM R S terminals to measure the resistance gi gg yt ka a ob Normal if all three terminals have 1 KQ or greater Tex E P i 2 Contrary to 1 touch of the tester to DIP IPM 52C 195 Meer terminal and to DIP IPM R S terminals to measure pul H a g m the resistance ngo zit MR i JT qp Si Normal if all three terminals have 100 kQ or greater JE S 3 Touch of the tester to of DIP IPM DMI soldered E SS NUES part and of the tester to DIP IPM R S terminals to measure the resistance Ors Normal if all three terminals have 1 kQ or greater 4 Contrary to 3 touch of the tester to of DIP IPM DMI and of the tester to DIP IPM R S terminals to measure the resistance Normal if all three terminals have 100 kQ or greater Contact with specified terminals to measure 191 SMGBO0043 rev 1 04 2010 HITACHI Troubleshooting Inspire the Next OOOO Service Manual 5 Touch of
16. 14 In the case it will result in motor burning or compressor failure 122 SMGBO0043 rev 1 04 2010 Troubleshooting HITACHI Service Manual Inspire the Next T Troubleshooting PME Ie necu Me EE 123 Tie Initial troubleshooting eoe teatro tu eve th ee eel eden vedantic 124 7 1 1 Checking using the 7 segment display sese eene nene nene 124 7 1 2 Failure of the power supply to the indoor unit and the remote control switch uuuuss 125 7 1 8 Abnormal transmission between the remote control switch and the indoor unit 126 7 1 4 Abnormal operation of the devices ssssssssssssssssssssssee eene nhner nnne n nennen einn nnn nnne enne 127 7 2 Troubleshooting procedure sssssssssseeeeeeneeneeeeen eene nnne ener nnn 135 VM PEEPOLEe men MR 135 7 2 2 Troubleshooting by alarm code ssssssssseesseee EAEE inerenti 137 7 2 3 Troubleshooting in check mode sse nennen enne ennt enne en enne nnns 176 7 2 4 Troubleshooting using the 7 segment display c ccceeceeeeeeceeeececeaeeeeeesesaeeeeeeeeeeeeeeeeeeeseaeeeeeeeeaaees 182 7 2 5 Cause of inverter stoppage ssssssssssssssssssssssseseeenenee eene nete tenen nrtnr sinet SEEE ness sn nnn nn sen nnns 184 7 3 Procedure for checking ea
17. 13 Indoor unit expansion Ti 2r valve opening 96 nt LL Outdoor unit Corresponds to check mode 1 H 3 14 expansion valve mv1 H I H H opening 96 as Estimated electric current indication Lit Dx Corresponds to check mode 1 Compressor running Du Rd zr The total value is displayed when several compressors are running current A UT LL 15 Returns to temperature indication 181 SMGBO0043 rev 1 04 2010 HITACHI Inspire the Next Troubleshooting Service Manual 7 2 4 Troubleshooting using the 7 segment display e Simple checking by 7 segment display 1 Turn ON all indoor inits connected to the outdoor unit Turn ON the outdoor unit 1 3 Auto addressing starts 2 Outdoor unit circuit board PCB1 3 e Checking method by 7 segment display During auto addressing the following items can be checked using the outdoor unit s on board 7 segment LED display Disconnection of power supply to the indoor unit Reverse connection of the operating line between the outdoor and indoor units Duplication of indoor unit number Operating conditions and each part of refrigeration cycle can be checked by 7 segment and push switches PSW on the PCB in the outdoor unit During checking data do not touch the electric parts except for the indicated switches because 220 240V is applied to them Pay attention not to contact the tools with electrical
18. 32 Iit retenir sec rade n dene mea eee pe FE Lee esL d FR ERA EE daa 260 11 9 Service and maintenance record sssssssssssseeseeeen menn nennen nennen nnns 261 11 10 Service and maintenance record using the 7 segment display sees 262 11 11 Service and maintenance record by remote control switch sseee 263 11 12 Pump down method for replacing the compressor 264 11 SMGBO0043 rev 1 04 2010 Contents HITACHI Inspire the Next Service Manual 12 SMGB0043 rev 1 04 2010 Contents Service Manual H ITACHI Inspire the Next O model codes and Description 0 e Unit code list 7 NOTE All references of the Built in horitzontal units contained into this Service Manual document have been abbreviated as RASC unit Unit Code Unit Code RASC 3HVRNE 7E340005 RASC 5HVRNE 7E340008 RASC 10HRNE 7E340111 3k de 1 3k 3N p 10HR na III eee Madeiin EET archer aT ns Europe R410A Unit type a inven Unit HA Heat 1 0A outdoor unit Pump abe REGIS outdoor unit Compressor Pump Refrigerant RASC Compressor RASC Power HP Power HP Single Phase 1 Inverter system 13 SMGBO0043 rev 1 04 2010 HITACHI Inspire the Next Accessory PC ART PC P2HTE PSC A64S PSC A1T PC LH3A PC ARH PC ALH PC ALHD PC ALHZ PC ALHC ACCESSORY CODE LIST Name Wall mounted remote contro
19. sezoi sesovorozeis sp rere ere oee EE EE LN d E f sej TJA amp luno 2 ino rose ddd ay N ZAN d NEL LAN N qz tr 13 L 1 ND 23 NOD ay THod UO jddng Janod 3 SG i aod wo 55 buniusus SMSC Gs iB5d wo 3x5 juonu SC en 85d uo SEUMDS Geis raed SMHL SWHL ZAK 199d u0 sbumjes pexj u0j204 MS 189d UO SOUS UU UO pub wondo T MSG JojosUUo sdH bumas SG LAW apoq Wo EELER 30d 3690855 SO SIGj08UUO ND 468583005 40120300 2nsubDu04 29 3 E 38j68H S95530035 E 8107591007 Jojodog UOJ JOOPING JO JO 20007 ZHOS AOOb Ne 3Oj95805 sowy SWION vod 3NHHOL O9SV3M 104 wesbeip Bun e21u329 3 Z S E SMGB0043 rev 1 04 2010 61 Control System HITACHI Service Manual Inspire the Next 4 Control System This chapter presents the control system flowcharts for the H V RNE RASC series and the complete range of the Hitachi indoor units LEES 9E CUNEO UTE Um 63 4 1 Device COMtMON SYSLOIN PEL 64 4 2 RASC 3 10 H V RNE PCB 14 sess eene enhn ceaaaaeaeeeeeeeeeeeeetececnccieeeeeeeeeteeeeees 66 4 3 Protection and safety control sssssssssssseesseeneen ne ennemis 67 4 4 Standard operation sequence ssssssssssssssssssesseeeereerenre nennen nennen eer EEEn EEE EEEE 68 44 1 Cooling operato sessie teet petto fepe os ua T GI Eae Cea EE Des kr Smau H RR FE AREE Eoo Duur Prae Deni EE 68 44 2 Diy Operation e
20. t Temp for top of comp switch Refer to section 7 3 1 self checking procedure of PCB using the remote control During the transient periods such as starting time and other the indicators or niri Li may be displayed for a limited time This is indicated only when a remote sensor is connected The indicator RPK series cannot connect a remote sensor is normally displayed Therefore the indicator is This indicates the internal information for the remote control switch Ex During the operaton of several compressors the average temperature of two compressors is indicated If the temperature is higher than 126 C i25 HITACHI Inspire the Next Indication of micro computer input output 12 Micro computer input Vit L output in indoor unit Im I 13 Micro computer input w loutput in outdoor unit LL Indication of unit stoppage cause 14 Cause of stoppage d t H Abnormal operation occurrence counter Troubleshooting Service Manual PCB Part name Y52C relay Y21 Y21 Relay for 4 way valve A Y52C Relay for compressor FAN1 Y20A1 Relay for selonoid valve SVA FAN1 Relay for RASC fan AUD AUD YCH Relay for cranckcase heater J Y20M YCH 63H2 Relay for PSH AEN AN 63H2 HH Operation OFF power OFF LH
21. 30 26 20 20 Thermistor resistance k 12 5 10 0 8 5 3 36 25 15 10 5 0 5 10 15 20 25 30 35 40 45 50 55 60 Ambient temperature C Action Phenomenon Cause Check item Turn OFF main switch Fault Check resistance Replace thermistor if faulty Faulty of the inlet air temperature thermistor RASC unit outdoor ambient thermistor Incorrect connection Check wiring to PCB Repair wiring and connections Faulty PCB1 Replace PCB1 and check operation Replace PCB if faulty 159 SMGBO0043 rev 1 04 2010 HITACHI Inspire the Next Troubleshooting Service Manual Alarm code Description ALI Abnormal operation of the thermistor for the evaporating temperature during hn the heating process outdoor unit The RUN LED flickers and ALARM is displayed on the remote control switch The unit number the alarm code and the unit code are alternately displayed on the set temperature section The unit number and the alarm code are displayed on the display of the outdoor unit PCB 1 If you find an abnormal operation of the thermistor check all the thermistors as shown below The evaporating thermistor during the heating process is attached to the heat exchanger as shown in the figure below If the thermistor is faulty such as short circuit less than 0 2kQ or cut more than 840kQ during eight
22. 6 min in case of DRY operation Gas pipe surface temp of indoor heat exchanger Lower than 11 C Higher than 11 C Lower than 2 C Liquid pipe temp of indoor heat exchanger Higher than 2 C 75 SMGBO0043 rev 1 04 2010 HITACHI Inspire the Next 4 5 2 Prevention control for excessively high discharge gas temperature 76 Heating operation Lower than 65 C Outlet air temp of I U Higher than 65 C CMC OFF v Compressor stop Is it continuous for more than 3 min Higher than 60 C Discharge air temp of indoor unit Lower than 60 C Is setting temp lower than inlet air temp of indoor unit Yes CMC ON Y Compresor RUN SMGBO0043 rev 1 04 2010 Control system Service Manual Control system HITACHI Service Manual Inspire the Next 4 5 3 Outdoor unit electrical expansion valve control 1 After supplying power source the electronic expansion valve is completely opened 2 When the compressor is stopped the electronic expansion valve is completely closed to adjust its opening 3 At starting operation compressor is operated opening of the electronic expansion valve is set at a specified opening a Specified opening during heating operation 1 minute 4 During the cooling and the defrosting operations the electronic ex
23. After retry control the condition of monitoring is continued for 30 minutes The maximum value 1 and 2 are as follows 1 Main power 220 240V 380 415V HP 3 5 10 Current A 16 0 24 0 20 0 2 HP 220 240V 220 240V Demand setting 10 3 5 10096 11 0 13 17 0 Current A 7976 8 0 10 13 0 5096 5 0 6 5 8 5 186 SMGBO0043 rev 1 04 2010 Troubleshooting Service Manual 7 3 Procedure for checking each main part 7 3 1 Self checking procedure of PCB using the remote control switch Use the following troubleshooting procedure for testing the PCB in the indoor unit and the outdoor unit RUN STOP Stop operation w Press O er Press both A switches for three seconds C ex Indication of unit No Zi PCB check mode HIGH ren 12348 COOL roi M wa Indication of unit number After 7 seconds cse HIGH Mon 12345 Operating automatic LUI PCB check ATC CHECK After approx 5 seconds max 30 seconds in case of a transmission failure between the indoor unit and the outdoor unit HIGH ten 12348 9 2 COOL LU CHECK Abnormal operation 1 After 1 second coo n M Abnormal operation 2 Wot AIC Lt CHECK After 1 s
24. Faulty PCB PCB1 for the control PCB for the inverter Disconnected wires to PCB Check the connections Repair the wiring connections Faulty PCB Replace PCB if faulty Incorrect wiring Disconnected wires insufficient contacting Check the continuity Check for looseness of connection screws Replacing wires repairing tightening screws Incorrect wiring Check the connection nos Correctly connect the wires 146 SMGBO0043 rev 1 04 2010 Troubleshooting HITACHI Service Manual Inspire the Next Alarm code Description me Excessively low voltage or excessively high voltage for the inverter LL RASC 3 5 HVRNE The RUN LED flickers and ALARM is displayed on the remote control switch The unit number the alarm code and the unit code are alternately displayed on the set temperature section The unit number and the alarm code are displayed on the display of the RASC unit PCB This alarm code is displayed when the voltage between terminal P and N of Dip IPM is insufficient and the alarm has three occurrences in 30 minutes If the number of occurrences is smaller than two the retry operation is performed The alarm code 06 means fan controller Abnormal Operation Restart the operation Y Is the power supply voltage No Check the wiring and the 230V 10 cable capacity l Yes Is the voltage over 187V during No operation Yes
25. HIGH TEE Unit number coor nmi Iz i and alarm code HE Press O to see the previous data displayed pone a After seven seconds See A IHIGH er 12345 COOL 1 za t Ar Check mode 2 Pt Press Refer to check sr mode 1 for details HIGHI cus ng Inthe check mode 2 the data of the first three units that are Pres OK for eu lar connected serially to a remote control switch are available more than 3 You can press the OK switch to disable the check mode 2 seconds VENTI GE Check mode 1 cannot be disabled even if you press the OK switch Check mode disabled 176 SMGBO0043 rev 1 04 2010 Troubleshooting Service Manual Although the wireless controller is used for the wall type indoor unit with the built in receiver part you can check the alarm code by connecting the PC P2HTE Suction grille check Contents of the check mode 1 Connector for HITACHI Inspire the Next g NOTE occurs The unit does not operate by pressing the operation switch The above function is available only when the alarm occurs The PCB check using the remote control switch is not available The indication is the data when you are connecting PC P2HTE The indication is not the data before the alarm The next indication is shown if y
26. In the TEST RUN mode the red RUN LED of the receiver is turned ON and the green TIMER LED flickers 0 5 seconds ON lt 0 5 seconds OFF 2 HITACHI Then the timer switches off for two hours 7 NOTE Ifthe yellow LED does not turn ON the commands from the remote control switch may not have reached the receiver Send the commands again 2 In the case of the RPK model the TIMER LED is turned OFF 5 Adjust the angle of the air grille as follows The air louver has a mechanism for the auto swing function Do not move the louver by hand forcefully a Select the FAN mode by pressing the MODE Switch b Setthe louver angle by pressing the LOUVER switch 115 SMGBO0043 rev 1 04 2010 HITACHI Test run Inspire the Next Service Manual 6 Stop the test run normal a The test run stops automatically after two hours b You stop the test run by pressing the RUN STOP switch again After the test run has finished check that the red RUN LED and the green TIMER LED turn OFF 7 Stop the test run abnormal for the PC RLH 9 11 If you cannot use the PC LH3A because of battery shortage or any other reason perform the emergency operation as follows a COOL switch Press the COOL switch in order to start the cooling process Press the COOL switch again in order to stop the cooling process b HEAT switch Press the HEAT switch in order to start the heating process P
27. Liquid line Gas line as Outdoor unit fi EX pm Gas stop valve Liquid stop valve P 4 i Nitrogen tank ad For air tight test amp nitrogen blow Ree Eus during brazing Vacuum cylinder Example of evacuation and refrigerant charge for RASC H V RNE 7 NOTE Check to ensure that there is no gas leakage When large amount of the refrigerant leaks the troubles as follows may occur Oxygen deficiency Generation of Harmful gas Due to Chemical Reaction with fire Use thick gloves to protect your hands from liquid refrigerant injuries when handling refrigerant Charge the refrigerant correctly after calculation Overcharge or insufficient charge of the refrigerant may cause the compressor failure Insulate the liquid pipe for prevention of the capacity decrease according to the ambient air conditions and the dewing on the pipe surface by the low pressure Outdoor units has been charged with refrigerant for 20 m RASC 3HVRNE or 30 m RASC 5HVRNE of pipe length It is required that additional refrigerant be charged according the piping length if it is longer than 20 m RASC 3HVRNE or 30 m RASC 5HVRNE A CAUTION Refrigerant over undercharge Compressor failure When charging refrigerant accurate refrigerant quantity must be charged 2 2 7 Pump down refrigerant When the refrigerant should be collected into the R
28. Servicing H ITACHI Service Manual Inspire the Next 9 1 5 Removing the compressor NOTE If the outdoor unit and upper obstacle such as the ceiling is too close less than 1 meter it is necessary to disconnect the refrigerant piping after collecting all the refrigerant from the check joint ff it s possible move the unit to ensure more service space for servicing the compressor Do not deform any piping when you are removing the covers If you deform the piping the welded portion may be broken Capi apillary Compressor Check joint Piping service PSH PSC cover 1 Revome half of the upper cover by removing the fifteen Cut here 15 fixing screws Also remove the piping service cover by removing the eleven 11 fixing screws 2 Open the sound insulation cover wrapped around the compressor and remove the terminal box cover at the C Yj compressor fixed by one 1 screw Disconnect the N compressor wires in the terminal box ao AGI 7 NOTE N t HII 5 oc Make sure that the fasten terminals for the compressor are T1 D normal Any lack of grip should lead to a change of the old I ii Vu H terminals for new ones It is recommended to clamp the s i E BN fasten terminals to improve the contact e N Check and take Note of each terminal number and indications for its correct connection at the reasembling process If wires are connected in incorrect order it
29. Counting number of the connected units RUN STOP MODE FAN SPEED SCHEDULE 4 VENTI LOUVER Ne RCS indication Fault Inspection points after the power source is OFF The power source is not turned ON The connection of the remote control cable is incorrect The connect wires of the power supply line are incorrect or loosened No indication The power source of outdoor unit in not turned ON The setting of the unit number is incorrect The connection of the control cables between each indoor unit is incorrect When multiple units are controlled by one remote control switch The counting number of the connected units is incorrect 1 The connection between the remote control and the unit is correct 2 Connecting points of the remote control cable 3 The contact of the connectors of the remote control cable 4 The screw fastening of each terminal board Setting of the DIP switches on the printed circuit board Wire connection order of the bridge cable Connecting points of the bridge cable The contact of the connectors of the bridge cable co 0 07 Back to O after the checking Select the TEST RUN mode by pressing the MODE switch COOL OR HEAT Press the RUN STOP switch a The TEST RUN operation will start The TEST RUN operation will be finish after two hours You can also finish the TEST RUN operation by pressing
30. Does the voltage fall during the operation because of the operation of other apparatus Yes No Frequency can increase higher than 60 Hz m Does LED201 on PCB2 ii Yes How is the Compressor stops atter compressor compressor gt immediately lower Faulty PCB2 Replace it electromagnetic switches operation than 20 Hz CMC turn ON P4 c A P a O N NN No Compressor stops when frequency increases T Approx 20 Hz to 60 Hz Is connection correctly No between DipIPM and capacitors gt Connect correctly CB1 and CB2 DCL or CMC Y Be extremely carefull because of the iid high voltage Yes Faulty Is the DC voltage over 240V Check capacitors CB1 2 Replace the capacitors Capacitors have high voltage No Normal Be extremely carefull 1 Faulty PCB2 Replace it Check the wiring PCB2 and capacitors CB In case the wiring is correct replace the PCB2 1 If the capacitor has a high voltage perform the high voltage discharge procedure Refer to section 7 3 4 2 Checking procedures of the diode module are displayed in item 7 3 4 147 SMGBO0043 rev 1 04 2010 HITACHI Inspire the Next Troubleshooting Service Manual Alarm code Description pt it RASC 10HRNE
31. Excessively low voltage or excessively high voltage for the inverter The RUN LED flickers and ALARM is displayed on the remote control switch The unit number the alarm code and the unit code are alternately displayed on the set temperature section The unit number and the alarm code are displayed on the display of the Outdoor unit PCB This alarm code is displayed when the voltage between terminal P and N of IPM is insufficient and the alarm has three occurrences in 30 minutes If the number of occurrences is smaller than two the retry operation is performed The alarm code 06 means fan controller abnormal operation Restart the operation Y Is the power supply voltage 380V 10 or 415V 10 Yes Is the voltage over 323V during operation Y Yes Does the voltage fall during the operation because of the operation of other apparatus No A No Yes No Does LED021 on PCB2 ON after compressor s electromagnetic switches CMC turn ON No Check the wiring and the cable capacity Frequency can increase higher than 60 Hz How is the compressor Compressor stops immediately lower than operation 20 Hz Yes Faulty PCB2 Replace it Compressor stops when L frequency increases Approx 20 Hz to 60 Hz Is connection correctly between IPM and capacitors CB1 an
32. 10 8 2 Principle of compression sssessssssssesesesesnenenenn nennen enne nemen nnn nnne irta inns rnn arnari i 254 239 SMGBO0043 rev 1 04 2010 HITACHI Inspire the Next 10 HITACHI Inspire the Next 10 1 Inverter Main parts Service Manual 10 1 1 Specifications of inverter Output characteristics 1 Power source voltage AC220 240V 2 Non loading free output 3 Ammeter type volt meter X1 1 IV 220 0 f Hz 115 Hz Aplicable model RASC 3 5 HVRNE RASC 10HRNE Aplicable power source 1 230V 50 Hz 3N 400V 50 Hz Input current 17A RASC 3HVRNE 25A RASC 5HVRNE 25A Control Method Vector control Range output frequency 20 115 Hz Accuracy of frequency 0 01 Hz at applicable frequency range Conditions Conditions 1 Power source voltage AC380 415V 2 Non loading free output 3 Ammeter type volt meter X1 1 v 400 F 380 300 200 100 Soft start stop 0 125 0 5 1 2 Hz s 4 steps 0 125 3 00 Hz s Protection function Excessive high or low voltage for inverter Excessive low voltage at a voltage is lower than 194V DC Excessive high voltage at a voltage is higher than 420V DC Excessive low voltage at a voltage is lower than 350V DC Excessive high voltage at a voltage is higher than 750V DC Abnormality of current sensor 0A detection 240 Stoppage at a current of compressor smalle
33. 189d UO Bum uejebujag PIMS vMSQ 180d UO Bumas Aipede j00p1nQ Ups EMSA 18d UO Bumas vorpunj Alelpny ups TMSA 189d UO ung 1531 Up1IMS LMSA 18d UO Buppay pms MSd 189d UO Buppeu ipiis CMSd 189d UO Bunsoyap pao103 ipis LMSd 189d UO asn4 1433 43414 SION 7 LAN Aosu uy YSS Dd Jonuo 182d INOW HAL Wdl dld Jasuapuo WD 1023 Da 91002 10 YMS ainssaud DSd Uon2aloJd JO YMS aunssalg YBIH HSd Jojstuliau ur WHL doy sossaidio gt 101sluj9 6WHL Guidi 1015108 SWHL te joopinQ J0 SWAAY ZWHL 110930 oss dwo Aejay Ku Xe A 110930 afe eM piouajos Aejay u 2 I0 2d NA plouajos Aejay Ki voz A 110930 ave3H to Aejay Ai HD A JOWOJSUEL Ld queg 71D pueog jeuruua La ane uoisuedx3 2140149343 LAW Aejay anyen Bulsiana YAY PME VAS 105 8du105 101281005 neubeuomap LWD SNJ Jamo 133 uea 1010 13OW JOSS3IdUJ0 104 10304 LDW Syewdy awWeN Weg ew 3 5 Electrical wiring diagrams Uonisod tpys dig aui seyoipur peyeui auo apis SIUL a xog 0 7002 e2 129 3 T Ge irii kinia ESAn pone IS S E g SRE ER ns 9Msa SMSa vMSG EMSA TMSA LMSA Buip s A10 9e4 YDIMs d q Jo uonisog Bulnas WHL tas Oo S o Jo Ce wa PS d EJ E Erg Css sso smsa ENHL
34. 67 SMGBO0043 rev 1 04 2010 HITACHI Control system Inspire the Next Service Manual 4 4 Standard operation sequence 4 4 1 Cooling operation LU Indoor unit O U Outdoor unit i Temp lt 55 C Power to Power to PCB in lt Power to CH ON O U ON O U ON reds of gt 60 C Power to CH OFF m gt Auto louver 0 reset Power to Power to PCB in Start of transmission between L U ON LU ON gt I U and O U OFF Start of transmission between Higher than I U and remote control switch activation level gt Power to YH2 in gt LU ON MD ON Power to YH2 in ON LU OFF Lower than activation level for unit with drain pump Setting at EET COOL COOL indication HIGH indication Pressing Air fow change over MEDIUM indication gt LOW indication oy gt A Switch increasing set temp Set temp indicated switch V Switch decreasing set temp P for unit with drain pump h Power to YH2 for MERO f it with EHW A 20 sec PAMEN Power to EHW ON Pressing PET RUN STOP Fan LED ON RUN is indicated switch Operation at set indoor fan speed Mor Indic
35. By touching the side of the tester to the N NT m Ta ooo terminal of ISPM and the side of the tester to R m me 9 m A Pe me 9 T and S of ISPM measure the resistance If all the dd m aic C ig EN resistances are more than 100 kO it is normal N fete ERSTES C aisles om ON c ON 193 SMGBO0043 rev 1 04 2010 HITACHI Troubleshooting Inspire the Next Service Manual Checking the transistor module 1 By touching the side of the tester to the P I m ooo terminal of ISPM and the side of the tester to U ad 2 H V and W of ISPM measure the resistance If all R 9 the resistances are more than 1 KQ itis normal 2 By touching the side of the tester to the P terminal of ISPM and the side of the tester to U V and W of ISPM measure the resistance If all the resistances are more than 100 KQ it is normal o 3 By touching the side of the tester to the N NA E Wwe e m terminal of ISPM and the side of the tester to ED Bo Ht U V and W of ISPM measure the resistance If all the resistances are more than 100 KQ it is normal 4 By touching the side of the tester to the N terminal of ISPM and the side of the tester to U
36. Control frequency of inverter compressor The frequency control is determined with the next parameters Ratio I U capacity RASC capacity Temperature difference between air inlet temperature and setting air temperature The frequency control is determined with the next parameters Ratio I U capacity RASC capacity Temperature difference between air inlet temperature and setting air temperature Fixed frequency stop compressor during 30 sec After defrosting condition was completed Opening degree expansion valve of RASC Fully open Control range of expansion valve opening degree is determined to optimize temperature on the top of compressor When number of I U is decreased determined with I U capacity Ratio of before after decrease or with above condition Fully open Opening degree expansion valve of indoor unit Control range of expansion valve opening degree is determined to optimize U gas pipe temp Tg I U liquid pipe temp TI difference The expansion valve opening degree is controlled according to the number of connected I U Specified opening degree at normal control starting Afterward controlled to optimize I U liquid pipe temp TI The expansion valve opening degree is controlled according to the number of connected I U Specified opening degrees controlled by temp on the top of compressor Td Fanstep is operated for RASC liquid
37. Forced stop of compressor 1 LL a aperation a NOTE 3 It is possible to select the cancellation of the outdoor hot start control by pushing both PSW1 amp PSW3 simultaneously during 3 seconds This operation is reset once the compressor is in Thermo ON mode The cancellation of the outdoor hot start control configuration could damage the compressor if it is usually used In that case the unit warranty will be void e DSW2 Piping length selection function Function Setting position Remarks ON Setting before shipment FFEIT 123456 ON Function selection setting bats Function selection is set by PSW ON oni gt External input output selection is External input output selection Ekki set by PSW e DSW3 Capacity setting Unit Setting position Remarks ON RASC 3HVRNE HERRENA 123456 ON e i RASC 5HVRNE ARAARA No setting is required 123456 ON RASC 10HRNE Pil bil 123456 55 SMGBO0043 rev 1 04 2010 HITACHI Inspire the Next DSWA RSW1 Refrigerant cycle setting In case of using an H Link II net it is required to set the refrigerant cycle number Setting position Setting position DSW4 RSW1 Setting for tens second ON Setting for units digit HANNE first digit ON Example for 16 Fill Bk and 123456 Rotary switches positions RSW71 are set by inserting a screw driver into the groov
38. O U Outdoor unit Start of AUTO LOUVER mu Pressing Red ARR a He a Sunia only for air panel AUTO LOUVER switch ai RR or Indoor Unit Mr E rae E i Stop of with Auto Louver Stop of inverter gt Stop of MC lt 55 C on the top of Power to CH ON comp 260 C gt Power to CH OFF gt Stop of MOF gt Power to Y52C OFF Power to CMC OFF 4 Lower than 50 C A ca fan motor MIF OFF Slow fan speed Temp Pressing RUN STOP switch After 3 min 20 sec Shorter than 2 min Higher than 40 C LU discharge air temp Operation at Slow Speed Lower than 40 C STOP RUN STOP lamp OFF DRY set fan speed amp set temp indication continuously ON After 2 min Power to LU OFF gt Power to PCB in I U OFF Indication LCD OFF Power to O U OFF Power to PCB in O U OFF Power to CH OFF Reset of timer for defrosting 73 SMGBO0043 rev 1 04 2010 HITACHI Inspire the Next 4 4 4 Defrost operation control Control system Service Manual Heating operation Defrosting Yes Power to RVR OFF gt DEFROST indication start condition Power to MIF OFF Power to MOF OFF a r y
39. Remarks Turn off the main switch of the outdoor unit Remove the covers the thermistor the crankcase heater the power wirings and other items according to the chapter removing the parts of the oudoor unit Make sure that the terminal part of the detached power supply wires is not exposed by the winding insulation tape and other items Attach the manifold to the check joint of the high pressure side and the low pressure side of the outdoor unit Turn on the main switch of the outdoor unit Set the exclusion of the compressor by setting the DSW so that a broken compressor will not work You can set the exclusion of the compressor by setting the DSW1 4 in ON position The compressor replacing mode is performed The DSW1 4 on the outdoor unit PCB ON The cooling is run This operation is performed for up to a maximum of ten minutes Ifthe inverter compressor is excluded the operation starts after three minutes The operation finishes when one of the following conditions occurs 1 Ten minutes have passed and STP is displayed in seven segments 2 O8 is displayed in seven segments 3 When Ps 0 1MPa is continued for one minute in ten minutes STP is displayed in seven seconds and the operation finishes The operation may finished when any of the conditions 1 to 3 occurs Close the liquid stop valve completely To avoid the spillage of all the refrigerant if th
40. Service Manual PCB drawi ng The PCB in the outdoor unit is operating with 6 types of DIP switches 1 rotary switch and 3 push switches The location is as follows a D SEGI fg pswe Lepe Pagg pswi 5 FS pv ps oog T BS DSW3 DSW4 ES o Wed dtm a ssf D we LED3 i DSW5 X p Switch indication LED and jumper indication DSW1 Test run This LED indicates the transmission DSW2 Piping length and selection function LED1 Red status between the indoor unit and DSW3 Capacity setting the RCS DSW4 amp Ref cycle number setting This LED indicates the transmission RSW1 LED2 Yellow status between the indoor unit and DSW5 End terminal resistace setting the outdoor unit DSW6 Power source setting LED3 Green Power source for the PCB JP1 Annual cooling JP2 Release phase detection JP3 Self diagnosis JP4 Fix cooling mode JP5 Alternative defrosting mode JP6 Control for existing piping 7 NOTE The mark M indicates position of dips switches Figures show setting before shipment or after selection Not mark B indicates pin position is not affecting Before setting dips switches firstly turn off power source and set the position of the dips switches If the switches are set without turning off the power source the contents of the setting are invalid 66 SMGBO0043 rev 1 04 2010 C
41. Set temp b1 Inlet air temp b2 91 Discharge air temp b3 92 Liquid pipe temp b4 93 Remote thermistor temp b5 Outdoor air temp b6 94 Gas pipe temp b7 95 Evaporating temp at heating b8 96 Control information b9 97 Comp top temp bA 98 Thermo temp of remote control switch bb C Micro computer state indication I U micro computer C1 O U micro computer C2 D Stopping cause state indication Stopping cause state indication d1 E Alarm occurrence Times of abnormality E1 Times of power failure E2 Times of abnormal transmitting E3 Times of inverter tripping E4 F Automatic louver state Louver sensor state F1 H Pressure frequency state indication Discharge pressure H1 99 Suction pressure H2 9A Control information H3 9b Operating frequency H4 9C J 1 U capacity Indication I U capacity 1 8HP J1 O U code J2 Refrigerant cycle number J3 Refrigerant cycle number J4 L Opening of ex valve I U ex valve L1 9d O U ex valve 1 L2 9E O U ex valve 2 L3 O U ex valve B L4 P Running current indication reference Comp current P1 9F 263 SMGB0043 rev 1 04 2010 HITACHI Inspire the Next 11 HITACHI Inspire the Next Field work instruction Service Manual 11 12 Pump down method for replacing the compressor No Procedure
42. Touch of the tester to DIP IPM DCL2 terminal and Transistor Module to P of ISPM DIP IPM soldered part to measure the resistance Normal if all three terminals have 100 kQ or greater 11 Contrary to 10 touch of the tester to DIP IPM DCL2 terminal and to P of DIP IPM soldered part to measure the resistance Normal if all three terminals have 1 KQ or greater 12 Touch of the tester to DIP IPM DCL2 terminal and to N of DIP IPM soldered part to measure the resistance Normal if all three terminals have 100 kQ or greater 13 Contrary to 12 touch of the tester to DIP IPM DCL2 terminal and to N of DIP IPM soldered part to measure the resistance Normal if all three terminals have 10 kQ or greater Resistance gradually increases during measurement Contact with specified terminals Tester to measure 192 SMGBO0043 rev 1 04 2010 Troubleshooting HITACHI Service Manual Inspire the Next e RASC 10HRNE Procedure for checking the ISPM Remove all the terminals of the ISPM before check If items a to h are performed and the results are satisfactory ISPM is normal Measure it under 1 kQ range of a tester A CAUTION Electrical hazard Can cause se
43. V and W of ISPM measure the resistance If all the resistances are more than 1 kQ it is normal e Procedure using a digital tester 7 NOTE The digital tester must be able to check semiconductors and continuity Based on the folowing scheme of ISPM with the contactor the reactor capacitors and the resistance follow the next procedures CMC1 DCL isti 4 r P1 ue HN E A sisls pce R201 Q301 Q303 Q305 SASAS AW NW l 100G S 3 2 2 2 R215 R216 R2 R202 1 AR 1 INS 1 AR R Wo Wo paska ZZ CBI wn u l C ZD201 E D 3 A v Vz 22V L iy T __ R2 7 302 304 306 al v1 v ro 212 CB2 Power Ap i6 a o ai SASASA lsu T dr AS JU Aw JC Am a a a a a I TTR umm a e e e e Checking the diode module 1 By placing a jumper from P1 to RST or N to RST no continuity and no variation on voltage drop should appear 2 By placing a jumper from P1 to RST or N to RST continuity and variation on voltage drop nearly 0 365 should be displayed and the same value in all cases Not the same value means that the diode module is damaged 194 SMGB0043 rev 1 04 2010 Troubleshooting HITACHI Service Manual Inspire the Next e Checking the transi
44. Yes id No Is the refrigerant corectly Charge correct charged refrigerant volume Yes T ie king B S gas neon Check the ex valve Yes Or remove the cause of y discharge air short circuit Repair leaks of gas Correctly charge refrigerant at indoor and RASC units 149 SMGB0043 rev 1 04 2010 Troubleshooting HITACHI Inspire the Next Service Manual Alarm code Description va I Excessively High Discharge Gas Temperature at the Top of Compressor LL Chamber The RUN LED flickers and ALARM is displayed on the remote control switch The unit number the alarm code and the unit code are alternately displayed on the set temperature section The unit number and the alarm code are displayed on the display of the Outdoor unit PCB This alarm is indicated when the temperature of the thermistor on the top of the compressor is maintained higher than 127 C for 10 minutes or higher than 140 C for 5 seconds under cooling operation 1 This alarm is indicated when the temperature of the thermistor on the top of the compressor is maintained higher than 120 C for 10 minutes or higher than 140 C for 5 seconds under heating operation 1 1 For RASC 3HVRNE the temperature is 115 C and 125 C in cooling and heating mode Is the thermistor on top of No Thermistor for high discharge compressor normal p Faulty thermistor gas temperature at the top of i comp
45. at the interface point between the user s supply and the public system It is the responsibility of the installer or user of the equipment to ensure by consultation with the distribution network operator if necessary that the equipment is connected only to a supply with a short circuit power Ssc greater than or equal to xx see Ssc column Installation restrictions may be applied by supply authorities in relation to harmonics RASC 10HRNE This ese unit s is are out of scope of IEC 61000 3 12 4 Check to ensure that the power supply voltage is within 10 of the rated voltage HITACHI Inspire the Next 3 5 Check to ensure that power supply has an impedance low enough to warranty not reduce the starting voltage more than 85 of the rated voltage 6 Check to ensure that the ground wire is connected 7 Connect a fuse of specified capacity 3 2 Electrical wiring for outdoor units 3 2 1 Electrical wiring connection for outdoor units The electrical wiring connection for the outdoor unit is as shown below e RASC 3 5 HVRNE PLP P 53 Earth terminal Power wires SMGBO0043 rev 1 04 2010 Clamp Power wires Transmission wires 0 AC230V DC5V Power Transmission wires wires H ITACH I Electrical wiring Inspire the Nex
46. 2010 Troubleshooting Service Manual 7 2 Troubleshooting procedure HITACHI Inspire the Next 7 2 1 Alarm code If the RUN LED flickers for 2 seconds there is a failure in the transmission between the indoor unit and the remote control switch Possible causes are Broken remote cable Contact failure in the remote control cable Defective IC or defective microcomputer In any case ask your retailer for service If the RUN LED flickers 5 times 5 seconds with the unit number and the alarm code displayed make a note of the alarm code refer to the table below and ask your retailer for service Alarm code table Abnormal indoor Abnormal refrigerant unit no cycle no CooL MED nini Fg EE AIC ABNL IN Indicated for Model code a second Alarm code alternatively Model code CooL MED m Pd H n Indication Model AG H Heat pump P Inverter Connected number F Multi of indoor units L Cooling only E Others h IVX individual operation L KPI SMGBO0043 rev 1 04 2010 Code No Category Type of Abnormality Main Cause 01 Indoor unit Activation of protection device Float switch activated Activation of PSH locked motor abnormal operation in 02 Rasc Unit Activation of protection device the power supply phase Float Switch Act
47. 3096 Pressure Switch for control OFF ON No Is fan operated for more than 3 min No N TrL 2 TrL142 Y No Temp on the top of comp 2 100 C and EVO 2 400 pulse Y Outdoor liquid Temp on the top of comp 2 95 C Fan air flow ratio 110 Fan air flow rati 1 step up pipe temp Te s TC Pressure switch for control ON No lt 1 C Outdoor liquid pipe temp Te Yes Yes Is fan operated for more than 3 min Control system Service Manual 32 lu l l l 1 29 26 30 area 23 20 15 17 19 21 23 Outdoor temperature 9C TrL Indoor unit liquid pipe temp TrL1 Indoor unit liquid pipe temp on switching PSC for control ON y Air flow ratio 60 gt 7 C Yes gt lt v Fan air flow ratio 11096 Fan air flow ratio same condition io y TrL TrL1 2 Yes e Y ow ratio down Fan air fl 1 step y 80 gt Pressure switch for control OFF ON Indoor air flow VL decreased and pressure switch for control ON 2 step down Is fan operated Is fan operated more than 3 min SMGBO0043 rev 1 04 2010 more than 3 min Fan steps MOF ON regulation Control system HITACHI Serv
48. 6 1 Checking procedure before the test run When the installation is finished perform the test run according to the following procedure After performing the test run hand over the system to the customer Perform the test run of the indoor units one by one in order Make sure that the electrical wiring and the refrigerant piping are correctly connected Start the indoor units one by one in order to make sure that the indoor units are correctly numbered You should perform the test run according to the 7 2 Test Run Procedure on the next page A WARNING General warning Injuries of several kinds Do not operate the system until all the check points have been cleared Make sure that the stop valves of the outdoor unit are fully open Then start the system Make sure that the switch on the main power source has been ON for more than twelve hours in order to warm the compressor oil by means of the oil heater Do not push the button of the magnetic switch es Make sure that the stop valve of the gas line and the stop valve of the liquid line are fully open Electrical hazard Can cause serious injuries or death Measure the resistance between the ground and the terminal of the electrical components Make sure that the electrical resistance is more than 1 MQ Otherwise do not operate the system until you find the electrical leakage and you repair the electrical leakage Do not impress the voltage on the
49. 7 NOTE Measure the low pressure by the pressure gauge and keep it always over 0 01MPa If the pressure is lower than 0 01MPa the compressor may be faulty 238 SMGBO0043 rev 1 04 2010 Main Parts Service Manual 1 0 Main Parts ODER ar 239 RUNE 240 10 1 1 Sp cifications of inVerter iei te Ron nete ipo p e rer EEA EFE bonc dune hed du a e HOC RAE bene 240 10 12 Inverter time Chart icio oie rer ttn Dr ce t er E te ree beet ro Eris ias SE rere Fuera eR EE E REEL cde 242 10 1 3 Protective T hCllOh iate cte ierit eater eteea ctt te be ed exa epe ek ea e EE aec bts ER a Eee eR es CR eet bnt ER A ER Aia 243 10 TA eI ortelos piro ECCE 244 ui Eno P LE 245 10 3 Electronic expansion valve ssssssssssssssseeeneeeene enne nm nnne n EEEE nennen mener nennen 247 10 3 1 Electronic expansion valve for outdoor unit seeen eee eene 247 10 4 High pressure protection device sssssssssssssseeeeeeeme emere nnne nnne rrernmrrn nnns 248 10 5 IIEUcCIQMMM 249 10 6 Capacitor CB1 CB2 0 eee rt enn reenter tena ennemi enne rr en nennen nennen ener 252 10 7 Reactor DGL ennt ede teret TEL bee Re er ieee ea 252 10 8 Scroll compressor sssssssssssssssssseseeeeeee eren nennen nenne mener r nns n ns nn EE teen ner nn nn nnns 254 10 8 1 Reliable mechanism for low vibrating and low sound sse een 254
50. CN550 on PCB when performing If 2V or over are applied between CN550 5 to CN550 3 on PCB for 10 sec Approx after starting operation the PCB is normal Note The voltage may not be conducted squen tially after 10 sec to perform the above operation SMGBO0043 rev 1 04 2010 Troubleshooting Inspire the Next H ITACHI Service Manual Alarm code Description n Abnormality of thermistor for discharge gas temperature LL compressor thermistor The RUN LED flickers and ALARM is displayed on the remote control switch The unit number the alarm code and the unit code are alternately displayed on the set temperature section The unit number and the alarm code are displayed on the display of the Outdoor unit PCB This alarm code is indicated when the thermistor is short circuited less than 1 kO or cut greater than 6 MO during the cooling or heating operation Thermistor onTop of compressor Is the thermistor connected to THM9 of PCB No Yes No Is the resistande of THM9 Faulty thermistor Connect it between 1kO and 6kO Yes Faulty PCB Thermistor 200 resistance KQ AE 100 N g S s IL 6 5 0 25 50 100 125 150 Temperature C Thermistor resistance characteristics Action Phenomenon Cause Check item Turn OFF main swi
51. Measure discharge pressure Faulty pressure Check continuity after Replace it if faulty switch decreasing of pressure Faulty high Insufficient Misscaiepmaibtenee uses Repair looseness pressure switch contacting y Replace connector Incorrect Check connections Repair connections connection Check decreasing air flow Replacecdhenilster for Faulty of outdoor fan control volume at pressure switch for p control activative evaporating temp if faulty Faulty of pressure switch for Check activated pressure and Replace it if pressure switch for Activation of high pressure control connecting wire control is faulty Switch due to excessively high discharge pressure during i heating operation Overcharged refrigerant Check cycle operating temp Charge refrigerant correctly Mixture of non condensable gas Check ambient temp and Recharge refrigerant after in refrigerant cycle pressure vacuum pumping Clogging of discharge piping Check for clogging Remove clogging Check for clogging Remove clogging Check connecting wiring and Replace connector connectors Pauly er malfunction a Check operating sound from coil Replace coil T expansion valve Check discharge gas thermistor Replace thermistor Check attaching state of discharge gas thermistor Peatach Menmnistor Liquid line stop valve i gas line Check stop valves Fully open stop valve stop valve are not in operation
52. PSH and pressure switch for control PSC 1 Remove the six 6 screws of the side cover Slide the cover downward 2 Remove the electrical service cover by unscrewing the nine 9 fixing screws Slide the service cover downward and remove it using the handle 3 Collect the refrigerant from the check joint 4 Disconnect the connector in the electrical box PCN13 PSC PCN8 PSH and disconnect Float Switch connector RPR Relay board and Magnetic Switch terminals 5 Cut the high pressure switch and control pressure switch from the brazing neck using a burner 9 1 7 Removing reversing valve coil A DANGER Electrical hazard Risk of death Check that the LED201 red located on the DIP IPM is OFF Do not touch the electrical components when LED201 Red is ON in order to avoid an electrical shock Do not touch the electrical components of the PCB directly 1 Remove the six 6 screws of the side cover Slide the cover downward 2 Remove the electrical service cover by unscrewing the nine 9 fixing screws Slide the service cover downward and remove it using the handle 3 Disconnect the PCN6 connector on the PCB in the electrical box 4 Remove the reversing valve coil by removing the screw fixing the coil 222 SMGB0043 rev 1 04 2010 Servicing Service Manual PSH PSC Reversing valve coil Screw Servicing Service Manual 9 1 8 Removing ex
53. Pi pipe temp freeze protection C 4 Outdoor temperature DE NET C ct UL Indoor unit heat x me 5 exchanger gas pipe H d temp C aS 6 Evaporating temp mr r at heating C UL Lt of 7 Control information Hn H Discharge gas temp EL iu 8 atthe top of comp H H H chamber C Compressor pressure frequency indication 9 Discharge pressure D E y high x 0 1 MPa tt a 40 Suction pressure low I n roe x 0 01 MPa U 1 LT m nf 11 Control information 7 ict i 7l 12 Operating frequency Im bee Hz UL it 180 SMGBO0043 rev 1 04 2010 Indication of the category code Indication of the temperature etc h Corresponds to check mode 1 k ub Ti Corresponds to check mode 1 23 Corresponds to check mode 1 54 k Corresponds to check mode 1 hE Corresponds to check mode 1 kr Corresponds to check mode 1 AZ Corresponds to check mode 1 kr Corresponds to check mode 1 hF Corresponds to check mode 1 H Corresponds to check mode 1 H Corresponds to check mode 1 H INENLI Corresponds to check mode 1 Hi I Z Hz Troubleshooting HITACHI Service Manual Inspire the Next Expansion opening indication 4 i Z Corresponds to check mode 1
54. Temp WB 7 NOTE Indoor Fan Speed HIGH Piping length 7 5m main piping 5m branch piping Nominal Pd and Ps Indoor unit combination The above curves indicate pressures under the following conditions Indoor total capacity 100 compared with the capacity of the outdoor unit Connected 1 indoor unit 2 5m x 4 Do not use the above data for the refrigerant charge procedure These data should be used as a reference for the checking of operating conditions 119 SMGBO0043 rev 1 04 2010 HITACHI Inspire the Next 6 6 Check list Test run Service Manual Check list on test run MODEL SERIAL No COMPRESSOR MEG No CUSTOMER S NAME AND ADDRESS DATE 1 Is the rotating direction of the indoor coil fan correct 2 Is the rotating direction of the outdoor coil fan correct 3 Is there any abnormal compressor sound 4 Has the unit been operating for at least twenty 20 minutes 5 Check the room temperature Inlet No 1 DB WB C No2 DB WB C No3 DB WB C No4 DB WB C Outlet DB WB C DB WB C DB WB C DB WB C Inlet No 5 DB WB C No6 DB WB C No7 DB WB C No8 DB WB C Outlet DB WB C DB WB C DB WB C DB WB C 6 Check the outdoor temperature Inlet DB C WB C Outlet DB C WB C 7 Check the refrigerant temperature Operation mode cool or heat Discharge gas temperature Td C Liquid pipe temperat
55. Thermo OFF note 1 Hg Alarm note 2 H3 Freeze protection overheating protection g5 Instantaneous power failure at outdoor unit reset note 3 HE nstantaneous power failure at indoor unit reset note 4 LH Stoppage of cooling operation due to low outdoor air temperature lt 5 C Stoppage of heating operation due to high outdoor air temperature and high indoor air temperature stoppage of heating operation due to low outdoor air temperature 20 C i Demand enforced stoppage i3 Retry due to high pressure increase 5 Retry due to abnormal high temperature of discharge gas excessive low suction pressure E Retry due to decrease of discharge gas superheat i Retry due to inverter tripping iH Retry due to voltage decrease 4 Expansion valve opening change protection EH Operation mode changeover of indoor unit note 5 Z Enforced thermo off when other indoor unit thermo off Bg Hot start after 4 hours switch on the outdoor unit E Cold draft protection 2 O NOTE Explanation of Terms Thermo ON A condition where an indoor unit is requesting the compressor to operate Thermo OFF A condition where an indoor unit is not requesting the compressor to operate Even if stoppage is caused by Alarm 02 is not always displayed Ifthe transmission between the inv
56. are disabled the units will operate during 2 hours without Thermo OFF and the 3 minute guard for compressor protection will not be effective during the test Fix rubber bushes with an adhesive on the panel when the conduit pipes to the outdoor unit are not used In forced stopped compressor mode the compressor operation is OFF 1 Ensure that the field supplied electrical components mains power switches circuit breakers wires connectors and wire terminals have been properly selected according to the electrical data indicated Make sure that they comply with national and regional electrical codes 2 Following the Council Directive 2004 108 EC 89 336 EEC relating to electromagnetic compatibility as the next table indicates Maximum permissible system impedance Zmax at the interface point of the user s supply in accordance with EN61000 3 11 MODEL Zmax Q RASC 3HVRNE 0 26 RASC 5HVRNE 0 19 RASC 10HRNE 0 20 52 SMGBO0043 rev 1 04 2010 Electrical wiring Service Manual 3 Harmonics situation of each model regarding IEC 61000 3 2 and IEC 61000 3 12 is as follows MODELS SITUATION REGARDING IEC 61000 3 2 AND IEC 61000 3 12 Ssc xx MODELS Ssc xx KVA Equipment complying with IEC 61000 3 12 RASC 3HVRNE RASC 5HVRNE This equipment complies with IEC 61000 3 12 provided that the short circuit power Ssc is greater than or equal to xx see Ssc column
57. awu zwin z a BH E aeaee BB oe o 82d UO 410 D9UUOD JO uone o ui Sueg 2u129 3 JO JUBWWAbUeLY voppouuo SUT w Low vvon2auu0 i5 i T Moppauuo uoppauuoz H a un usa xog jonuo jeauperg Wunosvu ui Lg Syed 211293 Jo jesodsiq wo o Ed Ed SOEN L ramita pv CE E ETA A De ENE A eee 4 MEA So eee PRR COMMITS pes 3 E GI bee esse eresecoro serororuro pels uaau on T Tue ue Fe I Eon N ONS uap eug AUM andhng aAA cue Lueg H m woo ea E pIousjos Gum i vwolewy ZHE9 swequxaoi enis SLND PIND T Y i 0 ong i 6ND eng ISA WAS MX ALO PAO 9ND Buum uorssiusued E e re tS vA eqs i i is wes sis o onsa t smsa z msa t loi iol 1MSd 5 l OJ l0 O emsa 9 msa msa v el i 2 9 rH pou u 19 el RI 9 anduyjewong puewsd CY uy uM pou i CUAS au CINA fozo10 frozo10 sosprotozoig ko 19 Fo 19 ig 19 froeozgio Eo io 9 19 zNod i BONN a TEN ccce enirn Picea e cct m a
58. each terminal board 3 The connection order of the power supply wire between the indoor units and the outdoor units The operation LED flickers 1 time 2 sec The connection of the remote control cable is incorrect The unit does not start This is the same as the item 1 2 and 3 The unit does not start The unit starts once and then the unit stops The connection of the thermistor or other connectors is incorrect There is tripping of the protector The flickering indicator is different from the one above Check the alarm code table in the service manual Service personnel should do the checking The operation lamp Flickers 1 Time 1s Unit No FALU Alarm Code dd and Unit Code EGHLU flicker The connection of the remote control cable between Indoor Units is incorrect The unit does not start Check by the abnormality mode table in the Technical Catalog Do it by service people Back to O after the checking Instructions for the recovery when the fuse of the transmission circuit is blown out 1 Correct the wiring to the terminal board 2 Set the 1st pin of DSW7 on the indoor unit PCB to ON Only for RPK 1 0 1 5 Set the 2nd pin of DSW7 on the indoor unit PCB to ON Except Only RPK 1 0 1 5 RPK 1 0 1 5 e ON 12 114 SMGB0043 rev 1 04 2010 Test run HITACHI Service Manual Inspire the Next 6 3 Test run procedure using the wireless re
59. flash Evaporating temperature at heating s I E 4 Z 19 80 C Ambient air temperature 10 au d 19 80 C Cause of stoppage at inverter 11 i See table at the next page Control information 12 I r ZH Internal information of outdoor unit PCB Control information 13 H 1 i Internal information of outdoor unit PCB Inverter secondary current 14 Hg ZH 00 199 A Outdoor unit address 15 m H opo 00 15 16 00 100 In case of twin triple quad type unit Indoor unit expansion valve opening E H amp Hu In case that opening is 10096 the information of 2nd to the 4th indoor ni ii 00 flashes units is indicated repeatedly Liquid pipe temperature of indoor unit freeze 17 n nr m The right character of the indication protection Lr LEA 1197127 CC represents the indoor unit setting No Indoor unit intake air t t 19 7127 ec d de ndoor unit intake air temperature 18 Ut ru 2 C Twin A b Indoor unit discharge air temperature 2H zn 19 127 C Triple A b c 3 a 19 An EL ec Quad A b c d Cause of indoor unit stoppage 20 eH H See table at the next page 182 SMGBO0043 rev 1 04 2010 Troubleshooting HITACHI Service Manual Inspire the Next Cause of inverter stoppage 11 Cause of indoor unit stoppage 20 Indication Contents Indication Contents l IPM ISPM dipIPM error ud Operation OFF Power OFF Instantaneous over current H 4 Thermo OFF J Inverter fin thermis
60. indicator is ON and the operation is started Therefore press the RUN STOP switch and stop the operation Cancellation of EEPROM from step 3 11 The LCD changes as shown below and the remote control switch automatically cancels the EEPROM rr bt 12 The LCD changes as shown below v LL After several seconds have passed the remote control switch is automatically activated again In this case the operation is not started automatically 190 Troubleshooting Service Manual If the indicators or FF are displayed at the A part the remote control thermostat is abnormal If you press the RESET switch or you leave the switches for 15 seconds the data of EEPROM storage cell inside of the remote control switch is cleared At this time the number is displayed at the A part which is shown in the figure below When the number is displayed EEPROM is abnormal ri L ay pt ans me Ln If the number which is displayed at the A part is the checking does not proceed to the next item 7 NOTE In case that the operation is not automatically started when the remote control switch is activated again the detection circuit for the momentary stoppage may be abnormal However the detection circuit will not interfere with the normal operation There is a case where the operation is automatically st
61. is 16 1 5 18 is24 1 25 16 is25 2 5 24 lt lt 34 2 25 is32 4 34 is47 3 5 32 is40 6 47 is 62 5 5 40 is63 10 62 is78 8 63 i e 78 is 112 14 3 112 is 147 22 incase that current exceeds 63 A do not connect cables in series 7 NOTE Follow local codes and regulations when selecting field wires circuit breakers and earth leakage breakers Use the wires which are not lighter than the ordinary polychloroprene sheathed flexible cord code designation HO5RN F Use shielded wires for transmission between indoor and outdoor units and connect the shielded part to the earth screw in the electrical box of the indoor unit as shown below Select the main switches in according to the next table ELB Model Power source Max Current CB no poles A mA All Indoor Units 1 230V 50Hz 5A 6A RPI 8 10 1 230V 50Hz 10A 10A 2 40 30 RASC 3HVRNE 28A 40A 1 230V 50Hz RASC 5HVRNE 37A 50A 2 63 30 RASC 10HRNE 3N 400V 50Hz 33A 40A informed later ELB Earth switch CB Switch Except RPI 8 10HP 59 SMGBO0043 rev 1 04 2010 Electrical wiring Service Manual HITACHI Inspire the Next dopeauuo 3 cSq1sq VoM 180 Sd J93eaH aseayuel gt HD 10 i Jasuapuo gt D 199d YO ipis SMSA
62. is an indication for frequency inverter Capacity code of indoor unit Indication code Equivalent capacity HP 06 0 8 08 1 0 10 1 3 13 1 5 14 1 8 16 2 0 18 2 3 20 2 5 22 2 8 26 3 0 3 5 32 4 0 40 5 0 48 6 0 64 8 0 80 10 0 n indicates the total number of Indoor Units i a J3 01 64 01 when shipment DSW5 RSW2 decimal indication J4 00 40 00 when shipment DSW5 RSW2 indication with T 16 numbers The indication of 255 is normal The total current is displayed when several compressors are running In case of the inverter compressor the running current of the primary side of the inverter is displayed HITACHI Inspire the Next e Contents of the check mode 2 Troubleshooting Service Manual When more than three indoor units are connected to one remote control switch the latest data of only the first three indoor units that are connected serially are displayed If you press the part of the TEMP switch the next display appears If you press the part Q of the TEMP switch the previous display appears l Temperature indication Indoor unit air inlet nou 77 1 temp at thermistor Eg CC Indoor unit discharge 2 airtemp at thermistor Li of Lr il att CC Indoor unit heat 3 exchanger liquid H 4
63. is maintained for 30 seconds after the The alarm is displayed when the abnormal transmission is maintained for 30 seconds from the starting of the Investigate the cause of the overcurrent and take the necessary action when the fuses are blown out or the 1 In case that terminal resistance DSW5 1P is OFF when H Link connection is performed Set the terminal resistance to ON when CN8 is removed Set the terminal resistance to OFF when CN8 amp is reconnected Power supply Faston terminal 380 415V 50Hz between 1 and 3 of PCN1 on PCB 142 SMGB0043 rev 1 04 2010 Troubleshooting Service Manual 1 Is DSW5 1P terminal No Gel Iearadt resistance on PCB1 ON y Nes Is the voltage between the terminal No Is LED1 red on 1 and 3 of PCB1 Check the fuses of the PCB1 ON 220V or 240V 2 Outdoor unit power supply n pe Remove CN8 of Is connector PCB1 PCN2 CN1 forthe V Yes Plug PNC2 and CN11 transformer loosened correctly Is LED2 green Yes PCB1 ON Yes on E n gt Replace the fuse No No Is LED3 yellow gt on PCB1 flickering No d Faulty PEE more than once in 10 seconds Connect CN8 of PCB1 Is PCB1 ecce gt Set correctly ing Yes Yes Is LED3 yellow ON even IS FEDS on POR
64. less than the target and also the RASC expansion valve opening is The compressor is stopped and then the retry operation is performed after 30 minutes No Is the thermistor on top of 4 compressor normal gt Faulty thermistor Is the thermistor installed No i correctly on the compressor Install it correctly i Yes Is it at cooling or heating mode Heating l l when the alarm has occurred Heating operation l Cooling Yes 4 Cooling operation Yes Check the I U expansion valve opening and the temperature on the top of the compressor by the RASC unit PCB Yes i I U expansion valve opening 300pls Yes l Is the temperature on the top of compressor less than estimated condensation temp Yes Check the RASC expansion valve opening and the temperature on the top of the compressor by the RASC unit PCB i Yes RASC expansion valve opening lt 70pls 7 Is the temperature on the top of compressor less than estimated condensation temp Yes i No Plug the connectors Are the connectors for the indoor expansion valve connected properly roneri re Connector on I U PCB for ex valve properly Junction connector for ex valve No LU Indoor Unit lt Is the RASC fan normal gt Replace fan motor
65. lt 50m lt 70m L Piping length 7 NOTE Install the branch pipe at the location from where the piping length to the indoor units is of equal distance However when different piping lengths from the branch pipe to the indoor units due to building construction are required the difference between the two pipes should be less than 8 m e Single combination example based on RASC 3HVRNE and RPI models 42 SMGBO0043 rev 1 04 2010 Piping installation HITACHI Service Manual Inspire the Next RASC 3HVRNE RPI 3 0F SNeE IMANAN qa S xu i 9 53 Y ss 9 215 88 z O19 f D pH 3 m od S 09 I a2 E a Cooling Refrigerant Heating Refrigerant Installation Flare Nut Flow Flow Refrigerant Piping Connectiion Flange Connection Brazing Connection Line N Name of Item N Name of Item 1 Compressor 12 Stop valve for gas line 2 Heat exchanger 13 High pressure switch for protection 3 Liquid tank 14 Pressure switch for control 4 Strainer 15 Ambient thermistor 5 Distributor 16 Condenser pipe thermistor 6 Revercing valve 17 Discharge gas thermistor 7 Capilary tube 18 Indoor exchanger 8 Elec
66. maintained for 30 seconds from the starting of the RASC unit Is power fuse for RASC unit No EF1 or EF2 normal Yes y Disconnect CN6 of PCB1 y Is LED2 green on PCB1 No Replace fuse if blown Note Investigate the cause of fuse blown flashing Yes Reconnect CN6 of PCB1 Is LED2 green on PCB1 No gt Faulty PCB1 Faulty inverter PCB flashing Yes Does flashing speed become faster than before Yes Inverter PCB is normal Check the wiring again PCB1 Control PCB in RASC unit Inverter dipIPM RASC 3 5 HVRNE Inverter IPM RASC 10HRNE 145 SMGBO0043 rev 1 04 2010 Disconnecting or insufficient contact of the wiring between inverter PCB and PCB1 Faulty PCB1 T Faulty inverter PCB Disconnecting or insufficient contact of the wiring between inverter PCB and PCB1 HITACHI Inspire the Next Troubleshooting Service Manual Phenomenon Cause Check item Action Turn OFF the main switch Disconnected wires insufficient contacting or incorrect connection Between control PCB inverter PCB and FANM Power source wiring for the RASC unit Check the continuity of wires Check for looseness of the connection screws Check the connection No Replacing wires repairing tightening screws and incorrect wiring
67. minutes continuously this alarm is displayed The position is indicated below Is the thermistor THM8 Te connected to PCB1 Yes Is the resistance of THM7 between 0 2 kO and 500 kQ Yes No Connect it No Faulty thermistor Faulty PCB1 A Action Phenomenon Cause Check item Turn OFF the main switch Fault Check the resistance Faulty thermistor for the evaporating temperature Replace the thermistor if faulty during heating Incorrect connection Check the wiring to PCB Repair the wiring and the connections Faulty PCB Replace PCB and check the operation Replace PCB if faulty Thermistor resistance kQ Thermistor characteristics 160 SMGB0043 rev 1 04 2010 10 15 20 25 30 35 40 45 50 55 60 Air temperature C RASC 10HRNE Number Identification Thermistor for discharge gas temperature EE Thermistor for outdoor ambient temperature Oo Thermistor for evaporating temperature Troubleshooting Service Manual HITACHI Inspire the Next Alarm code Description mE Incorrect capacity setting or combined capacity between ind
68. on the 7 segment display when you press LUC i PSW2 and PSW3 3 After selecting the input output terminal name eet 2 Pal Pa e Factory setting select your required function by pushing the PSW1 i 4 After setting the pin 6 of DSW2 to OFF the selected contents are memorized in the PCB of PSW3 the outdoor unit and immediately afterwards Pu n the function selection mode is set to OFF The Lt memorized data is maintained even when the power supply wires are disconnected The connection details of each function as well as the required parts are described in the first section 87 SMGB0043 rev 1 04 2010 Available optional H ITACHI functions Inspire the Next Service Manual 5 1 3 Description of optional input signals Fixing operation mode heating cooling 1 2 This input function is fixed in terminals CN1 or CN2 of the PCB of the outdoor unit to use it as a cooling and heating mode CN1 must be set up as follows Short circuit between the terminals 1 and 2 of CN1 set heating mode Short circuit between the terminals 2 and 3 of CN1 set cooling mode After having pre fixed the established mode the remote control can only be used to adjust the temperatures Stoppage code d1 20 will be displayed if an attempt is made to change the operation mode of any of the indoor units with the remote control Example of wiring diagram of fixing the operation mode Outdoor unit PCB
69. pipe temp Te stabilization control Fan Step is controlled according to RASC liquid pipe temp and temp on the top of compressor activation RASC 3 10 H V RNE activation RASC 3 10 H V RNE Outdoor unit ran increased number of I U step up Increased number of I U step up Fan stop decreased number of I U step down decreased number of I U step down limited the lowest by outdoor temp 4 Way valve RVR OFF ON OFF Turn ON for 1 min at starting and after Turn ON for 1 min at starting and after Solenoid valve SVA a a nie switch SUR ON e estis conf switch Tum OF ra By Pass valve defrosting Solenoid Valve SVF Oil return Turn ON at compressor operation RASC 10HRNE Turn ON at compressor operation RASC 10HRNE I U Indoor unit Tc Te Condensing temperature Evaporating temperature Td Discharge temperature TI Liquid temperature Tg Gas temperature Cap Capacity Temp Temperature 64 SMGBO0043 rev 1 04 2010 Control system Service Manual The figure below shows the outline of the control system Wireless remote control switch Thermistor for inlet air Thermistor of discharge air Thermistor for gas pipe Thermistor for liquid pipe Remote control MCU Transmission circuit Wireless transmission circuit A D conversion circuit I I Remote control switch R
70. piping service cover by removing the three 3 fixing screws Pull up and remove the cover using the handle 2 Remove the CN5A connector on the PCB in the electrical box 3 Hold the expansion valve coil and slightly rotate then pull it up Refer to the figure below to replace the electrical valve The lock mechanism is equipped with the expansion valve coil Check to ensure that the expansion valve coil is locked 9 2 9 Removing expansion valve Expansion valve 1 Revome the piping service cover by removing the three 3 fixing screws Pull up and remove the cover using the handle Brazing part 2 Collect the refrigerant from the check joint according to the section Removing Compressor 3 Remove the coils according to the section Removing Expansion Valve Coil 4 Remove the brazing as shown in the figure below Electronic Expansion Valve EVO 2 brazing parts Perform the brazing to remove and reassemble the electronic expansion valve by cooling with wet cloth Protect the connecting wires and pipe insulation from brazing flame 5 Reassemble the parts in the reverse order of removing procedures 234 SMGB0043 rev 1 04 2010 Servicing H ITACH i Service Manual Inspire the Next 9 2 10 Removing reversing valve 1 Revome the piping service cover by removing the three 3 fixing screws Pull up and remove the cover using the handle Collect the refrigerant from the check joint according to the s
71. rated current X105 Overload control release at a current smaller than rated current X 88 Fin temperature increase The unit is stopped when the fin temperature is higher than 80 C 1 Phase 100 C 3 Phase Earth detection The unit is stopped when the compressor is earthing 241 SMGBO0043 rev 1 04 2010 10 HITACHI Inspire the Next 10 1 2 Inverter time chart Main circuit power source Frequency instruction Output voltage Soft start stop frequency Failure signal Activation of protection device Overload signal Charged indication Frequency i LOW Frequency HIGH All bit 1 All bit 1 operation ES Main parts Service Manual 242 gt The changing speed dependes on the outer setting Output 10 sec Activation recovery SMGB0043 rev 1 04 2010 Transmit error 30 sec Protection activation Main parts Service Manual 10 1 3 Protective function 1 Excessive high or low voltage for inverter a Level of detection b b When the voltage of direct current is greater than A V abnormalities are detected When the voltage of direct current is smaller than B V abnormalities are detected Function Power supply 400V 50Hz 50Hz 230V 50Hz A 750 440 B 350 194 HITACHI Inspire the Next When abnormalities are detected the inverter compressor is stopped and
72. system Take particular care to ensure all copper piping is clean and dry internally There is no refrigerant in the cycle of the indoor unit A CAUTION Material contamination Performance reduction Cap the end of the pipe when pipe is to be inserted through a hole Also do not put pipes on the ground directly without a cap or vinyl tape at the end of the pipe A V Moisture and particle contamination Performance reduction If piping installation is not completed until next day or over a longer period of time braze off the ends of the piping and charge with oxygen free nitrogen through a Schrader valve type access fitting Damage to cooper pipes Perfomance reduction Do not use insulation material that contents NH3 because NH3 damage the cooper pipes and can be a source of future leakage Dew in piping surface May result in slippery ground Completely insulate both refrigerant gas piping and liquid piping between the indoor units and the outdoor unit 40 SMGB0043 rev 1 04 2010 Piping installation Service Manual 2 5 2 Refrigerant piping range The piping selection and the distribution must be designed according to the following specifications Example of single and twin systems Single system Twin system Applicable range O U and the farthest I U Twin C Aor B eq Item RASC 3HVRNE RASC 5 10H V RNE Actual length
73. the noise filter by by unlocking the four 4 plastic holders 7 NOTE Disconnect all the wires connected with the smoothing capacitor CB CB1 CB2 CA The wire has polar characters Identify the wire mark band Number Identification and the indication on the smoothing capacitor when wire connecting Reactor Identify the terminal numbers with mark band When Magnet contactor reassembling the terminals have to be connected to the correct numbers If incorrectly connected malfunctions or SSR damages will occur Capacitors Noise filter s oo000 237 SMGB0043 rev 1 04 2010 HITACHI d Inspire the Next O OOOO Service Manual 9 3 Collecting refrigerant for replacing indoor unit When the refrigerant should be collected into the outdoor unit due to indoor outdoor unit relocation collect the refrigerant as follows 1 Attach the manifold gauge to the gas stop valve and the liquid stop valve 2 Turn ON the power source 3 Set the DSW1 1 pin of the outdoor unit PCB at the ON side for cooling operation Close the liquid stop valve and collect the refrigerant 4 When the pressure at lower pressure side gas stop valve indicates 0 01MPa 100mmHg perform the following procedures immediately Close the gas stop valve Setthe DSW1 1 pin at the OFF side To stop the unit operation 5 Turn OFF the power source
74. the same RCS SMGB0043 rev 1 04 2010 AR AR Not individual all units This function can be selcted for all indoor units controlled by the same RCS It is necessary to select HH AA before set Items marked with are not used Do not change its setting condition 00 Item Optional functions Setting Contents of parts Content 9 Eo Removal of heating temperature 00 Not available This function is used to eliminate the 4 calibration 01 Available C shift 9 m Circulator function at heating 00 Not available This function is to avoid the stratification P thermo OFF 01 Available of air 00 Not available This function is used to guard the hi Ead Hase minimun compressor when it frequently starts and ied operation time of compressor 01 Available sions y 00 Std 01 100 hours With this function is possible to change Q3 hH Change of filter cleaning time 02 1200 hours His Ame when the remote controller advise about when is necessary to 03 2500 hours change the air filter 04 No indication 00 Not available This function eliminates the possibility of RA AA Fixing the operation mode changing operation mode from RCS or 01 Available central control 00 Not available This function eliminates the possibility of RA AA be Fixing the setting temperature changing setting temperature fr
75. the tester to P of DIP IPM soldered part and to DIP IPM U V W terminals to measure the resistance Normal if all three terminals have 1 KQ or greater 6 Contrary to 5 touch of the tester to P of DIP IPM soldered part and to DIP IPM U V W terminals to measure the resistance Normal if all three terminals have 30 kQ or greater Resistance gradually increases during measurement 7 Touch of the tester to N of ISPM soldered part and to ISPM U V W terminals to measure the resistance Normal if all three terminals have 1 KQ or greater 8 Contrary to 7 touch of the tester to N ofDIP IPM soldered part and to DIP IPM U V W terminals to measure the resistance Normal if all three terminals have 30 kQ or greater Resistance gradually increases during measurement Internal circuit of ACT part of inverter module Non faulty if 9 13 are checked and satisfied Contact with specified terminals to measure Measure with 1 kO range of a tester Tester 7 NOTE DCLI DCL2 DO NOT use a digital tester T P LI ilL 9 Check items 1 8 External Appearance and Internal Circuit of 10
76. thermo OFF condition Stoppage cause code 10 will appear When the input terminal is opened during the demand current control the control of the input terminal is reset 88 SMGBO0043 rev 1 04 2010 Available optional functions H ITACHI Service Manual Inspire the Next 5 1 4 Description of optional output signals e Operation signal 5 This optional signal is used to pick up the operation signal It can be used to turn on or off complementary units of the air conditioning system such as fans humidifiers etc Connect the cabling and use the materials as shown in section Avaliable ports Note that the contact of auxiliary relay X3 is closed when an operation signal is issued Alarm signal 52 This optional signal is used to pick up the activation of safety devices Connect the cabling and use the materials as shown in section Avaliable ports Note that the contact of auxiliary relay X3 is closed when an operation signal is issued Compressor on signal Z3 This optional signal is used to pick up the signal when the compressor is ON It can be used to check how the compressor is running at all times It is very useful for locking the compressor when the fans are locked Connect the cabling and use the materials as shown in section Avaliable ports Note that the contact of auxiliary relay X3 is closed when an operation signal is issued Defrost operation signal Z This optional signal is used to pick up whe
77. transmit the signal code of stoppage cause to PCB1 Cancellation of protection function Transmission for signal code of stoppage cause is cancelled when a stopping order is given or main power source is cut off Abnormality of current sensor a Level of detection When current of the inverter compressor decreases lower than 0 5A during the inverter compressor frequency between 15Hz and 18Hz an abnormality is detected Function When abnormalities are detected the inverter compressor is stopped and transmit the signal code of stoppage cause to PCB1 Cancellation of Protection Function Transmission for signal code of stoppage cause is cancelled when a stopping order is issued or main power source is cut off Overcurrent protection for inverter a Level of detection When the current detected by current sensor reaches 150 of the rated current overcurrent is detected Instantaneous overcurrent When the current detected by current sensor exceeds 105 of the rated current continuously for 30 seconds or for 3 5 minutes in total during a 10 minutes period overcurrent is detected Electric thermal relay Function When abnormalities are detected the inverter compressor is stopped and transmit the signal code of stoppage cause to PCB1 Cancellation of protection function Transmission for signal code of stoppage cause is canceled by stopping order is issued or main power source is cut off Protection of IPM DIP IPM
78. wall or ceilings use suspension and clamping systems as shown in the following figure Heavy piping Piping along Instant suspension the wall installation work 36 SMGBO0043 rev 1 04 2010 Piping installation Service Manual 2 4 Piping connection HITACHI Inspire the Next 1 Stop valve is located on rear cover side of unit Before connecting refrigerant piping the stop valve protection cover shall be removed 2 It is recommended to use a tube bender for pipe bending work 3 For gas pipe connection use the factory supplied flange pipe Only for RASC 10HRNE RASC 3 5 HVRNE RASC10HRNE amp D Lares N Gas valve Met Ex aii valve m d 2 4 1 Tightening torque See tighten torque in the next table Size Tightening torque N m Valve p Pipe Allen A B c D size wrench size RASC 3 5 9 53 S HVRNE Fig a 3 8 4mm 8 16 5 40 14 18 E 7 IRASC 10HRNE Fig a Wen 5 mm 8 38 40 9 8 RASC 3 5 15 88 X HVRNE Fig a 5 8 5 mm 10 30 80 14 18 RASC 10HRNE Fig b E 10 mm 25 49 55 75 8938 Flange connection check specific instruction on flange piping connection paragraph 37 SMGBO0043 rev 1 04 2010 HITACHI Inspire the Next Fig a For opening and closing the spindle valve O Ring Rubber Seat Surface When fully closed d Go Z pu
79. will lead to a compressor failure DU Cil heater Terminal box 3 Remove the rubber cap and the thermistor on the top Thermistor of the compressor holder Holder 4 Remove the two 2 crankcase heaters by releasing the springs A CAUTION Explosion risk Can cause injuries Make sure that there is no positive pressure inside the pipes 5 Cut the pipe at the compressor side of the brazing part 6 Remove the cut pipe by using a burner after cutting 220 SMGBO0043 rev 1 04 2010 Servicing Service Manual 7 NOTE Completely clean the oil in case it has spread to other parts of the unit such as bottom base pipes and others Make sure that the pipes are cut before working with a burner Do not expose the refrigerant cycle to the atmosphere for a long period in order to avoid water and foreign particles entering into the refrigerant cycle After removing the compressor replace it quickly If it is exposed to the ambiance for a long period seal both suction and discharge pipes Remove the cap for the compressor just before replacing the compressor Before assembling the compressor seal the suction pipe and discharge pipe with tape to protect the compressor interi
80. 04 2010 HITACHI Inspire the Next Code Figure 0 60291105 60199286 S z 7E790211 7E790212 7E790213 7E790214 7E799907 ul 60290874 60290875 70513200 is 9 60xxxx11 gt CAN 2 a 7E891938 7E891935 70519000 HITACHI Inspire the Next Accessory Name HC A160 SMS SMS alarm warning device P N23WA Air panel for RCI FSN2E Air panel ENSAM for RCIM FSN2E Air panel Bois for RCD FSN2E Air panel paveR We for RCD FSN2E B 23H4 Adapter for deodorant filter F 23L4 K Antibacteria filter F 23L4 D Deodorant filter F 46L4 D Deodorant filter PDF 23C3 Duct connection flange PDF 46C3 Duct connection flange OACI 232 Fresh air intake kit PD 75 Fresh air intake kit 16 SMGBO0043 rev 1 04 2010 Code 70519100 70530000 60197160 60291574 60291575 60199790 60199791 60199793 60199794 60199795 60199796 60199797 60199798 Contents Service Manual Contents HITACHI Service Manual Inspire the Next Accessory Name Code Figure PI 23LS5 3 way outlet parts 60199799 a Ti 0 TKCI 232 T duct connecting kit 60199801 J TE 03N Branch pipe 70800007 TE 56N Branch pipe 70800009 TE 10N Branch pipe 70800004 QE 810N Branch pipe 70800006 17 SMGBO0043 rev 1 04 2010 Units Installation HITACHI Service Manual Inspire the Next 1 Units Installation This chapter provides information concerning the installation of outd
81. 1 Not used standard 00 ce 00 zt Not prepared 01 Not used standard 00 00 Not used Standard 00 EH Not prepared 01 02 F i ee cee 00 Available EL an operation control at cooling thermo OFF H PEN 02 Slow 3 rr Forced thermo ON stoppage at 00 Available 5 cooling 01 Not available 00 Eg Not prepared 01 Not used standard 00 00 Available EE Aut tic f d trol EE utomatic fan speed contro 01 Not available 00 No function 01 OFF timer by 1 hour i This function is used to set the OFF timer X aale 02 OFF timer by 2 hours HR HR FI Automatic serung Tor OFF timer z z function automatically when the unit is only available for PC P1HE m started by the remote control switch 23 OFF timer by 23 hours 24 OFF timer by 24 hours 3 aale f f 00 Main This function is used when to remote na wc ro i TENNER EEPE pol Remote control main ub SSting 01 Sub control are installed in one system ro rz to Not prepared Not prepared 5 En Hommir 00 Not available HR HR FH Mode lock 01 Avaliable This function eliminates the possibility of 00 N ilabl changing operation mode from RCS but RR HH FH Temp lock ovevalens it is possible from central control 01 Available Hmm 00 Not available HH HR FH Fan lock 01 Available This function eliminates the possibility of 00 Not available changing fan speed from RCS or central nm nau rc L lock control HM UE Wee 01 Available HR RH Fe Cooling temperature range l
82. 12 Are the contacts for comp Check the surface of each contact L1 L2 and L3 by viewing Is there any voltage 13 abnormality among L1 L2 L2 L3 and L3 L1 Check to ensure that voltage imbalance is smaller than 3 Please note that power source voltage must be within 380V or 220V 10 Is the comp oil acidified during 14 compressor motor burning Check to ensure that the oil color is not black 199 SMGBO0043 rev 1 04 2010 HITACHI Inspire the Next Troubleshooting Service Manual Additional Information for CHECK LIST ON COMPRESSOR Check item Additional information mechanism of the compressor failure 1 amp 2 The liquid refrigerant return volume to the compressor is controlled by the discharge gas temperature Td when compressor is operating If Td thermistor is disconnected the liquid refrigerant return volume will become small by detecting the temperature even if the actual discharge gas temperature is high Therefore this abnormal overheating by detecting the temperature operation will result in insulation failure of the motor winding 3 amp 4 Overcurrent control operating frequency control is performed by detecting current by the PCB2 In this case winding insulation failure will occur since control is not available in spite of actually high current 5 amp 6 The current sensor checks phase and adjusts output electrical wave in addition to th
83. 31 Air outlet temperature of the outdoor unit DB WB C DB C WB 32 High pressure switch kg cm G 33 Low pressure switch kg cm G 34 Operating voltage V 35 Operating current A 36 Instructions to the client for cleaning the air filter Done Not yet 37 Instructions to the client about the cleaning Done Not yet method 38 Instructions to the client about the operation Done Not yet 261 SMGBO0043 rev 1 04 2010 11 HITACHI Inspire the Next 11 10 Service and maintenance record using the 7 segment display Field work instruction Service Manual Data sheet for checking by 7 segment display Customer s name Date Outdoor unit model serial no RASC Serial no RASC Serial no Operation mode 2 Test run start time 3 Data collect start time 4 Read out data from 7 segment in Outdoor unit Protection control code Total capacity of I U connected CP Input output state of Outdoor micro computer SC 52C FAN1 FAN2 20A 52C FAN1 FAN2 20A 20F 21 CH PSH 20F 21 CH PSH Alarm code for abnormal stoppage of compressor AC Inverter order frequency to compressor H1 Indoor order frequency to compressor H2 Air flow ratio Fo O U expansion valve opening Eo Temp at the top of compressor Td Evaporating temp at heating TE Ambien
84. 4 NC EM Electronic thermal activation 4 x d EN Sei ra Inverter voltage decrease zum ra ut TL ra pes ra m Over voltage m LI ra ut E ra ro m Abnormal inverter transmission m gt ra Abnormal current detection 4 Li NC lt a Instantaneous power failure detection x gt ra Reset of micro computer for inverter TR aa ra nut Earth fault detection from compressor Only starting 4 Li 4 NC DUK i Li a DUK Abnormal power source phase Open phase Li pa lt Im DIO Inverter PCB abnormality gt ra 1 Li ri ri x n Li Li Abnormal transmission i gt ra t i ra Ln P lt ra Abnormal current detection aal nu P pa 1 Abnormal protective device x L an n nu eaten r2 LL i Lt t Other factors R ra 184 SMGBO0043 rev 1 04 2010 Troubleshooting Service Manual Protection control code on 7 segment display 1 Protection control code is displayed on 7 segment when a protection control is activated 2 Protection control code is displayed while function is working and goes out when released 3 When several protection control are activated code number with higher priority will be indicated see below for the p
85. AL m AL A B C AL A B C 2 Charge less piping length RASC 5 10H V RNE W additional charge quantity AL x p Indoor unit Indoor unit 2 9 Drain piping 1 Drain pipe location is indicated in the below figures RASC 3 5 HVRNE m 400 Drain Piping 48 SMGBO0043 rev 1 04 2010 Piping installation Service Manual HITACHI Inspire the Next RASC 10HRNE Drain Pipe x2 locations 520 E 614 2 2 Connect a siphon as shown in the figure below Pay special attention when connecting it to the unit proper installation work is needed in order to guarrantee connection pipes matching IB gt 75 mm NU a Y 2 Slope 2 a Plug 3 Fasten the siphon to the drain hose with an adhessive and a field supplied clamp 4 Prepare a draining pipe of 25 OD outer diameter for the draining line which shall be performed by a down slope of 2 5 Check to ensure that the water drains smoothly by pouring some water into the drain pan 6 Check to ensure that the water do not remain in the drain pan 7 Check the drain connections periodically once a year in order to detect water leakage 7 NOTE f the unit is installed in a cold area the drain water may freeze Ins
86. ASC TOHRNE iiirrc erret er aerei eee eerie did eerie EE FO Yee ek eet ev eur enge pia 228 9 2 4 Removing PIPING Service COVER 5 2 coire tette voe Ead iste ce eere E eode d ERR EX Da gk o EUER SUY ae De FP E Ue VER e 228 9 2 2 Removing fan service COVED c cccccceeeeeeceeeeeeceeeeeeecesaeaeeeeseeeaaeceeeeeeaaaeaeeeesecaeaeeeeseeeeeeeeeeseeecaeseeeeeeeaees 228 9 2 3 Removing electrical box service COVEN 1 s cccccscecesdecesecceueesebennendcedeceneedendeeesneeeseoeeesdeteensseseeesneensntere 228 9 2 4 Removing the outdoor unit fan motor ssssssssssssssseseseeene eene ennt eret en nnne nn nnns 229 9 2 5 Removing the combpresSsOF iiie eec ede e di Re IE EA ETER HERR IE CARERE cnt BE EE EP LCM E a DERE che ERRARE DENN Rue cris 231 9 2 6 Removing the high pressure switch PSH and pressure switch for control PSC 233 9 2 7 Removing reversing valve coil ssssseseeee enne enne nennen nere enne ener enne 233 9 2 8 Removing expansion valve coil emen nennen enne en nere enne nennen nnns 234 9 2 0 Removing expansion Valve iecit teet tek ei a Reese Due d CREER E YR Eee kae k E co Ce tu des unen e uude NR Mc cin 234 9 2 10 Removing reversing valve eene nennen nennen tenen ent nort neni tne bs tn dEE sn pna sa sa Es pensa IE Ren aste kis 235 9 2 11 Removing Solenoid valve oe reiecit ancenestetcaiceesnevacedescbecsevertepseterssbencnnectensvasteessbec
87. ASC unit due to indoor outdoor unit relocation collect the refrigerant as follows 1 Attach the manifold gauge to the gas stop valve and the liquid stop valve 2 Turn ON the power source 3 Set the DSW1 1 pin of the RASC unit PCB at the ON side for cooling operation Close the liquid stop valve and collect the refrigerant 4 When the pressure at lower pressure side gas stop valve indicates 0 01 MPa 100 mmHg perform the following procedures immediately Close the gas stop valve Set the DSW1 1 pin at the OFF side To stop the unit operation 5 Turn OFF the power source 35 SMGBO0043 rev 1 04 2010 Piping installation H ITACHI Service Manual Inspire the Next A CAUTION Incorrect pressure Compressor failure Measure the low pressure by the pressure gauge and keep it in a measurement higher than 0 01 MPa 2 3 Suspension of refrigerant piping Suspend the refrigerant piping at certain points and prevent the refrigerant piping from touching weak parts of the building such as walls ceiling etc If touched abnormal noises may occur due to the vibration of the piping Pay special attention in case of short piping length 1 15m a 1 Fire proof section treatment Indoor unit Do not fix the refrigerant piping directly with the metal fittings The refrigerant piping may expand and contract In order to fix the piping to
88. Bre 252 10 8 Scroll compressor sssssssssssssssssssesee ee eere en nnne rrtn nnn en sinn en nennen nnn nnne ns 254 10 8 1 Reliable mechanism for low vibrating and low sound ssssssssssssseeenmeen enn 254 10 8 2 Principle of compressiOFn iri iier roter cespite eee pue epos Rec AEE Cone A DD pede gra eR rad kn dra pad ER EEE 254 11 Field eu digi mem 255 11 1 Checking the power source and the wiring connection eeenn e 256 11 2 Burnt out compressor due to an insufficient refrigerant charge sssesse 256 11 3 Insufficient cooling performance when a long piping is applied sssesssssessssss 257 11 4 Abnormally high operation sound in the ceiling type indoor unit eseeeesesse 257 11 5 Alarm code 31 cene di dco dde ee da E LE de REL Ld e REL d a ERE d d 258 11 6 Not well cooling due to insufficient installation space for outdoor unit or inlet outlet air bypass 258 11 7 Caution in case of refrigerant leakage sssssssseee enne eene 258 11 7 1 Maximum permitted concentration of HFOs sssessssse eene eme enne nennen 258 11 7 2 Calculation of refrigerant concentration sssssssssssssssssseeeeee eene nnne nnne n nennen sns 259 11 7 3 Countermeasure for refrigerant leakage ssseseeene enne nennen nene 259 11 8 Maintenance WOIK
89. Defrosting operation Defrosting stop condition LU intake air temp Lower than set temp 2 C LU intake air temp Operation at slow fan speed MIF Operation at low fan speed MIF 74 Power to MOF ON DEFROST disappears lt Inverter Frequency of Comp s40Hz es Power to RVR ON No Higher than set temp 2 C LU fan operation LOW Power to MC OFF 2 30 C 9C Operation at setting fan speed MIF l 25 C to 30 C SMGB0043 rev 1 04 2010 Control system HITACHI Service Manual Inspire the Next 4 5 Standard control functions 4 5 1 Freezing protection during cooling process or dry operation Power supply Cooling or dry operation A Is compressor operated for more than 30 min The judging time varies under the condition Cooling or dry operation Gas pipe surface temp of indoor heat Higher than 0 C gt exchanger 4 Lower than 0 C No Is it continuous for more than 3 min Simultaneous operation MIF operation at set or single unit fan speed in case of dry operation MIF OFF for 6 min Individual operation Fully closed electronic exp valve in indoor unit Compresor operation frequency 0 Is it continuous for more than 3 min
90. Eon Co RE SERRE LEHRER aE EEA EE RO cE eR EE a Ee ABER DR EEEE 41 293 Refrigerant piping length rrr tte rH Fr Et REI ER S NER aoea RR EE ER RR SER RXRE PRESE RPM RM ERE X ME ieee 42 2 5 4 Refrigerant piping selection sssssssssssssssssessseeeneeeeee enitn nenne ten nnns nnt r nnne s s inen terenne 44 2 6 Twin and quad system installation sssseee nennen 45 2 6 1 Height difference between indoor units and distributor ees m 45 2 6 2 Installing distributor sessssssssssssseseeeeeee eene nnnm nn nh nne nnmrs lien nnns nlsi nentes ss sen neris eden nnn 45 2 7 Rasc unit factory refrigerant charge wo kg 47 2 8 Additional refrigerant charge calculation ssssseeee nen 47 29 Drain PIPING iaaa 48 7 SMGB0043 rev 1 04 2010 H ITACH I Contents Inspire the Next Service Manual 3 Electrical g pmt 51 Sills Genera CHECK RETE 52 3 2 Electrical wiring for outdoor units 2 cece eee eete eee cette ee etree eae ee eee ea ae eene nnne 53 3 2 1 Electrical wiring connection for outdoor units enm nee 53 3 2 2 Setting of DIP switches for outdoor unit ssssesseeeeeen nemen nnne nnns 54 3 3 Electrical wiring between indoor unit and outdoor unit sse n 57 cC MBUVI ET EE 58 3 5 Electrical wiring diagrams ss
91. Failure of PCB Check PCB using the self Replace if PCB fails The LED and the LCD on i check mode 1 Failure of PCB in the indoor unit or the remote control the remote control switch Switch remain ON 1 Refer to section 7 3 2 2 Refer to section 7 3 1 129 SMGBO0043 rev 1 04 2010 Troubleshooting H ITACHI Service Manual Inspire the Next Abnormal operation of the devices Cont Action Phenomenon Cause Check item Turn OFF the main switch Indoor cool load is greater than the cooling capacity Calculate the cool load Use a bigger unit Correctly charge the Gas leakage or shortage Measure superheat refrigerant after repairing of refrigerant the gas leakage Excessively small diameter tube or long piping Measure and check the field supplied pipes Use the correct pipes Incorrect activation of the Check whether or nat the temp difference exists Replace the check valve check ee gutdoan before after the check for the outdoor unit valve Check for clogging Remove the clogging Check the connection cord and the connector Replace the connector Failure or malfunction of Is there an operation Replace the coil the expansion valve sound from the coil Is the thermistor on the Replace the thermistor Insufficient cooling process compressor normal Excessively low suction pressure Is the thermistor installed Correctly install the correc
92. GBO0043 rev 1 04 2010 HITACHI Inspire the Next Abnormal operation of the devices Cont Troubleshooting Service Manual Phenomenon Cause Check item Action Turn OFF the main switch Insufficient heating process Indoor heat load is greater than the heating capacity Calculate the heat load Replace the unit with a bigger unit pressure Excessively low suction Gas leakage or insufficient refrigerant charge Measure superheat Correctly charge the refrigerant after the gas leakage check and repairing Excessively small diameter or long piping Measure the field supplied piping Use the specified pipes Failure or malfunction of the expansion valve Check for clogging Remove the clogging Check the connection cord and the connector Replace the connector Is there an operation sound from the coil Replace the coil Is the thermistor on the compressor normal Replace the thermistor Is the thermistor installed correctly on compressor Correctly install the thermistor Clogging of I U O U Check the temp difference between the Replace the strainer for the piping strainer inlet and the outlet of outdoor unit or the indoor unit strainer Clogging of suction Check the temp difference of each part Remove the clogging Is the outdoor unit heat exchanger clogged Remove the clogging Insufficient air flow thr
93. HH bH S NS For the RPK model the factory setting is 200 hours Fixing the operation mode 5 This function is used when changes in operation modes are not required When this function is valid the operation mode that has been set cannot be changed Fixing of setting temperature 5A This function is used when changes in setting temperature are not required When this function is valid the setting temperature that has been set cannot be changed Fixing of operation as exclusive cooling unit This function is used when exclusive cooling operation is required This function invalidates the heating operation and the automatic COOL HEAT operation as the operation of exclusive cooling unit Automatic COOL HEAT operation 4 This function is used to operate the unit with changing cooling and heating operation automatically This function is invalid when the outdoor unit is cooling only model or the function of fixing operation as exclusive cooling unit is valid 100 SMGBO0043 rev 1 04 2010 Available optional functions Service Manual Fixing of fan speed HITACHI Inspire the Next This function is used to fix the fan speed When this function is valid the fan speed is not changes by the remote control Switch DN GI Not prepared AH Cooling Setting Temperature Compensation 5 2 This function is used to provide the longer cooling operation time When this function is valid Thermo ON OFF is contr
94. HI Inspire the Next In order to avoid oxidation pay much careful attention to basic piping work control to avoid infiltration of moisture or dust during the refrigerant piping work Three principles Cause of failure Presumable failure Preventive action 1 Dry Water infiltration due to insufficient Icing inside tube at ex valve Pipe protection Keep good dryness protection at pipe ends Water choking 1 Pinching Dewing inside of pipes 2 Taping Insufficient vacuum pumping time Generation of hydration and l oxidation of oil Flushing J i Clogged strainer etc insulation Vacuum Drying failure and compressor failure One gram of water turns into gas approx 1000 Irs 2 at 1 Torr Therefore it takes long time to vacuum pump by a small vacuum pump Infiltration of dust or other through Clogging of expansion valve Pipe Protection 2 Clean the pipe ends capillary tube and filter 1 Mounting Caps No dust inside of pipes Oxidation film during brazing 2 Taping without blowing nitrogen Oxidation of oil 3 Pinching Insufficient flushing by nitrogen Compressor failure l after brazing l Flushing Insufficient cooling or heating compressor failure Brazing failure Refrigerant shortage Careful Basic Brazing Work 3 No leakage Failed flaring work and insufficient l No leakage shall exist torque of squeezing flare Performance decrease Basic Flaring Work Insufficient torque of squeezing Oxidation of oil l flanges wr Overheat
95. HITACHI Inspire the Next p i UTOPIA DC INVERTER RASC SERIES RASC H V RNE Service manual Wee Z pu RASC 3 5 HVRNE RASC 10HRNE HITACHI Inspire the Next Specifications in this manual are subject to change without note in order that HITACHI may bring the latest innovations to their customers Whilst every effort is made to ensure that all specifications are correct printing errors are beyond Hitachi s control Hitachi cannot be held responsible for these errors Contents HITACHI Service Manual Contents Model codes and description Units installation Piping installation Electrical wiring Control system Available optional functions Test run Troubleshooting Spare parts Servicing Main parts Field work instruction SMGB0043 rev 1 04 2010 Inspire the Next 0 o O N O a A C N BEI E Contents HITACHI Service Manual Inspire the Next 0 JEMEN HIER 19 1 1 RASG 38 TO ACV IRN 22 T1 12T TANS OMA ON ce sais eased es Seta eren bec sta edet rne bee eer caches erit re cose cnet ene cee hese eee 22 IPod 23 1 1 3 Installation space Initial check sseseeeneeneemm nme eene nnnm nene nnne nns 23 T14 Plage p OV O e E Q 24 1 1 5 Available configurations ccccccecccceceeeecaeeeeeeee
96. I e Inspire the Next Service Manual 10 4 High pressure protection device If the discharge pressure is excessively high the compressor and the component parts of the refrigeration cycle can be damaged Therefore in case that the discharge pressure is higher than 4 15MPa R4104 the protection control is activated and the compressor is stopped RASC 3 5HVRNE RASC 10HRNE High pressure Presure switch for Presure switch for High pressure switch PSH control PSC control PSC Switch PSH To condenser 1 For controlling the high pressure not to increase A excessively during heating operation the gas by z pass circuit and the air volume of the outdoor fan is controlled automatically 2 eR ux Er EI as 2 The gas by pass circuit which is composed of e 7 T the solenoid valve and the capillary tube for flow E F adjustment control the high pressure not to increase M S excessively by leading the high pressure gas to the low pressure side Capillary Solenoid valve The dotted zone marks the gas by pass circuit 248 SMGBO0043 rev 1 04 2010 Main parts Service Manual H ITACHI Inspire the Next 10 5 Noise filters NF The noise filter decreases the leakage of noise made by the inverter to the power supply side Ter
97. ISPM a Level of detection When some of the output terminals between U and V V and W W and U of IPM dip IPM ISPM are short circuited an abnormality is detected When the running current of IPM DIP IPM ISPM reaches maximum rated current x 105 an abnormality is detected When an internal temperature is measured by internal thermistor of IPM an abnormality is detected When the control voltage of IPM DIP IPM ISPM decreases an abnormality is detected Function 10 When abnormalities are detected the inverter compressor is stopped and the signal code of stoppage cause is transmitted to PCB1 Cancellation of protection function Transmission for signal code of stoppage cause is canceled when a stopping order is issued or main power source is cut off 243 SMGBO0043 rev 1 04 2010 Main parts HITACHI Inspire the Next Service Manual 5 Fin temperature increase a Level of detection When the temperature of internal thermistor exceeds more than 100 C an abnormality is detected b Function When abnormalities are detected the inverter compressor is stopped and the signal code of stoppage cause is transmitted to PCB1 c Cancellation of protection function Transmission for signal code of stoppage cause is canceled when a stopping order is issued or main power source is cut off 6 Earth detection a Level of detection When the starting current of the compressor reaches 80 of the o
98. OVING reversing Valve seni an EE say ES LER d Ue De Ep e ee stoesadans Bue Venus 224 9 1 11 REMOVING solenoid valve nier mH Er retento Ero PR es ERI REX ROESPREH trt RR A HERR ERIS 225 9 1212 ana idu 226 9 1 13 Removing electrical components sssssssseeee enne een nennen nnen eren nene nre 227 9 2 RASG 1T0HRNE ee rere rere ee Rt erp ber rn ne e RP aa Pee ie gud 228 9 2 4 Removing PIPING Sevice COVER oic etis teni aiir aniar ea Lnd eee RP GRE E FEBR iy Erbe e EPA einan ds 228 9 2 2 REMOVING fan service cover eee Doro Vie ede ces Dee aeo a aa cd cere ke ed EE ed ONE da aeai cud 228 9 2 3 Removing electrical box service Cover eme enne enne erre 228 9 2 4 Removing the outdoor unit fan motor eem eene enne enne enne 229 9 2 5 Removing the compressor c cesesscceseconceseeceressecesesenanserenesusesesencecnssaeecenaeesrescenaesdereesauertescseensanees 231 9 2 6 Removing the high pressure switch PSH and pressure switch for control PSC 233 9 2 7 Removing reversing valve coil ssssseeeene enne enne nennen nne nnne nennen nnns 233 9 2 8 Removing expansion valve coil essen eene enne enne enne 234 9 2 9 Removing expansion valve sessssseeeeeeene nene e enne nennen nennen ener enne nenne enn nennen 234 9 2 10 REMOVING reversing ValVe eiii tenter aan SEE BERE Ru ESL E R
99. Service Manual Alarm code Description Cooling overload high pressure switch will be activated The RUN LED flickers and ALARM is displayed on the remote control switch The unit number the alarm code and the unit code are alternately displayed on the set temperature section The unit number and the alarm code are displayed on the display of the outdoor unit PCB This alarm code is indicated when the protection device is activated at following condition Evaporation temperature of outdoor unit is more than 55 degree and top of compressor temperature is more than 95 degree No Is the voltage between PCN9 1 and 3 220V 240V Yes Check the following value by remote control switch 1 Top of compressor temperature 95 C or less 2 Liquid refrigerant piping temperature of indoor unit 55 C or less if exceeding the above value repair it 164 SMGBO0043 rev 1 04 2010 Thermistor resistance KQ Is protection device activated 90 80 70 60 50 40 30 20 0 15 Yes No Faulty PCB1 Faulty PCB1 Thermistor characteristics 74 o6 43 33 20 12 5 5 3 3 6 2 5 10 5 0 5 10 15 20 25 30 35 40 45 50 55 60 Ambient temperature 9C HITACHI Troubleshooting Service Manual Inspire the Next A
100. Stop of MOF Power to Y52C OFF Power to CMC OFF 1 Pressing RUN STOP Switch After 1 Yes for unit with drain pump min 20 sec Power to YH2 OFF Power to EHW OFF for unit with EHW 20 Power to MIF OFF D RUN STOP lamp OFF DRY set fan speed amp set temp indication continuously ON STOP Y Power to I U OFF gt Power to PCB in I U OFF gt Indication LCD OFF Power to O U OFF gt Power to PCB in O U OFF gt Power to CH OFF 69 SMGB0043 rev 1 04 2010 HITACHI Inspire the Next 4 4 2 Dry operation L U Indoor unit O U Outdoor unit Control system Service Manual NM Pressing RUN STOP epis gt A Switch increasing set temp Sito V Switch decreasing set temp Switch gt P t Temp U ON on the top Power to CH ON O U ON of comp gt 60 C a Power to CH OFF Auto louver 0 Reset Power to Power to PCB in Start of transmission between LU ON LU ON I U and O U p OFF Start of transmission between Higher than LU and remote control switch activation level Power to YH2 in 1 U ON MD ON Power to YH2 in ON mE F I U OFF Lower than activation level for unit with drain pump Setting at 5E DRY DRY indication Set temp indicated gt RunLED ON RUN is indicated
101. T if CN2 of PCB1 is removed Faulty PCB1 No p Check other indoor units Is LED 3 yellow on PCB1 flickering more than once in 10 seconds Y Does the refrigeration System setting between DSW4 RSW1 on PCB1 and DSW5 RSW2 on PCB1 match Y Does the alarm occur with all the indoor units Faulty PCB1 143 p gt Check the wiring between the Outdoor unit and the indoor units or the fuse EF1 for PCB1 Set correctly Faulty PCB1 SMGBO0043 rev 1 04 2010 1 In case that terminal resistance DSW5 1P is OFF when H Link II connection is performed Setthe terminal resistance to ON when CN8 is removed Setthe terminal resistance to OFF when CN8 is reconnected 2 Check item Power supply Faston terminal 380 415V 50Hz between 1 and 3 of PCN1 on PCB HITACHI Inspire the Next Outdoor unit Indoor unit HITACHI Inspire the Next Troubleshooting Service Manual Phenomenon Cause Check item Action Turn OFF the main switch Power failure or no power supply Measure the voltage using the tester Supply the power Blown out fuse for the power source or activation of the outdoor unit breaker Short circuit between wires Check the insulation material for breaks Remove the short circuit and replace th
102. U A xu Start of transmission between LU and remote control switch i HEAT indication a HIGH indication Air flow ee change over MEDIUM indication switcl switch LOW indication Pressing pu TEMP ZA Switch increasing set temp gt Set temp indicated V Switch decreasing set temp switch for unit with drain pump idi for gt MD ON Pressing RUN STOP Run LED ON RUN is indicated switch lt 4 hours lt 2 hours 2 4 hours 2 2 hours Temp on the top of comp Indication of unit stoppage cause d1 22 lt 50 C lt 30 C lt 40 C lt 30 C Test run Hot start protection is activated after 2 hours or 30 C Temp on the top of Standard operation Hot start protection is activated after 4 hours or 40 C on the top of comp 2 Ta 20 C LU air intake temp MIF operation at slow speed 72 Lower than set temp Higher than set temp 2 C Power to Power to __ gt Y52C ON CMC ON Power to Y21 Power to RVR ON ON Power to MC After 30 sec Higher Operation at LU air than 30 C Operation at slow fan speed discharge temp setting fan speed Lower than 25 C 25 C 30 C Operation at low fan speed SMGBO0043 rev 1 04 2010 Control system HITACHI Service Manual Inspire the Next LU Indoor unit
103. al wiring Connect the operation wiring to the units in the same refrigerant cycle The refrigerant piping and the control wiring should be connected to the same indoor units If the refrigerant piping and the control wiring are connected to the units in the different refrigerant cycle it may cause a abnormal operation Use twist pair wire more than 0 75 mm for operation wiring between outdoor unit and indoor unit and operation wiring between indoor units H Link connection It can be also used shielded pair wiring Shield shall be connected to earth only in one cable side Use shielded wires for intermediate wiring to protect the units from noise obstacle at length of less than 300 m and 3 size complied with local code Do not use more than 3 cores for operation wiring H Link Core sizes must be selected according to the national regulations Opena hole near the connection hole of power source wiring when multiple outdoor units are connected from one power source line The recommended breaker sizes are shown in Table of electrical data and recommended Wiring Breaker Size 1 O U Inthe case that a conduit tube for field wiring is not used fix rubber bushes with adhesive on the panel All the field wiring and equipment must comply with local and international codes A CAUTION Electrical hazard Can cause serious injuries All the field wiring and electrical components must comply with local codes 7 NOTE Incorre
104. ation Check for any abnormal activation sound Strainer Clog Check that there is no temperature difference between both ends Ground wire Ground line Check for the continuity to earth Oil heater Activation You should activate the oil heater at least twelve hours before the start up by turning ON the main Switch 260 SMGBO0043 rev 1 04 2010 Field work instruction Service Manual 11 9 Service and maintenance record HITACHI Inspire the Next No Check item Action Judgement 1 Is the service area sufficient Yes No 2 ls there a short circuit of the discharged air Yes No 3 Any heat influence Yes No 4 Is the ground wire connected Yes No 5 Refrigerant piping Good Not good 6 j Fixing the units Good Not good 7 Isthere any damage on the outer surface or the Yes No internal surface 8 Checking the screw and the bolts Tighten if loosened Tightened Not tightened 9 Tightening the terminal screws Tighten all the terminal screws with a Phillips Tightened Not tightened screwdriver 10 Are the compressor terminals tightly fixed Push all the terminals Pushed Not pushed 11 Insulation resistance Measure the insulation resistance with an Good Not good insulation resistance meter Comp andfan motor greater than 3MQ Others greater than 3MQ 12 Does the drain water flow smoothl
105. ation of unit stoppage cause d1 22 lt 4 hours lt 50 C lt 40 C Test Run o l lt 2 hours Temp lt 30 C Temp lt 30 C Hot start protection is activated o on the top of on the top of after 2 hours or 30 C comp comp Standard operation 240 C Hot start protection is activated after 4 hours or 40 C 2 4 hours 2 2 hours Temp on the top of comp lt Ta 20 C 2 Ta 20 C Power Y52C ON to MC Power to CMC ON for unit with EHW No for unit with drain pump to 1 Power to Power to YH2 in 9 EHW ON i I U OFF 68 Higher than set temp 2 C 2 5 C COOLING operation LU Air intake temp Outdoor temp Lower than set temp SMGBO0043 rev 1 04 2010 Control system HITACHI Service Manual Inspire the Next LU Indoor unit O U Outdoor unit gt Start of H AUTO LOUVER i Pressin eo bennn only for air pane AUTO LOUVER switch b Altematively or indoor unit with Logs e nr uM Stepof UU auto louver gt Stop of inverter Stop of MC s55 C on the top of Power to CH ON comp Ae Power to CH OFF Temp gt
106. bee Eee arae Fu edad a o En ED ap Ya OE E e Fou HERE HERR ER 217 9 1 2 Removing fan service COVED cccccceceeneceeeeeeeneeceeeecesaeaeceececeaaeceeeseeaaaeeeeeeseeeaeeeesecqeeeeeeeseeeaeeeeeeseeaees 217 9 1 3 Removing electrical box service Cover nennen enne errem 217 9 1 4 Removing the outdoor unit fan motor ssssssssssssssssseseeene eene enne enn ennt nennen nnns 218 9 1 5 Removing the COmpresSsOF iiie eene aa A Cu Re a EEE aaa aain 220 9 1 6 Removing the high pressure switch PSH and pressure switch for control PSC 222 9 1 7 Removing reversing valve coil ssssssssssssesssessseee eene ether nennen enne n nnne nn sinere 222 9 1 8 Removing expansion valve coil emen nennen enne nenne ener enne 223 9 1 9 REMOVING expansion Valve iiie tek ei a Reese Bund CURE EEEE ao Ce tu Res unen avi cE TNR Mc cia 223 9 1 10 Removing reversing valve 2cccscencsescceescenssncccreseasseeescnesteseecesnanessaceesndacradeaansssaecetasissazesarenssceenneeeers 224 9 1 11 Removing solenoid valve ssssssssssessssssssseseeen ener ennt nhnnr sehen tenen sns i nnn ne nene denen terne sese Ent 225 9 1 12 Removing the PCB ieiiret ttt REREHDR I EFRESREN TERR ESAE Er EELE EEPE PROE ERERM SENE SEEN EOE ERIS EEM EEEE EEEE iS 226 9 1 13 Removing electrical components ciere crinem etes eet autore nerunt eite da sorte penu asap red anii 227 92 R
107. between Single L Bn O U and the farthest I U Twin C A or B Equivalent length between Single Leq 45 26 Total piping length Lift between I U and Piping length from each I U A B m O U is higher H m O U H m O U is lower H m Lift between 1 U m 0 5 LU indoor unit 41 SMGBO0043 rev 1 04 2010 HITACHI Inspire the Next HITACHI Inspire the Next 2 5 3 Refrigerant piping length Piping installation Service Manual The refrigerant piping length between indoor units and outdoor units must be designed using the following chart Maintain the design point within the dark area of the chart which shows the height difference according to the piping length RASC 3HVRNE RASC 5 10H V RNE H m 30 When outdoor 49 unit is installed higher than indoor unit 10 10 20 30 When outdoor 45 unit is installed higher than indoor unit 10 L m 10 20 0 40 50 L m 10 10 When outdoor When outdoor unit is installed unit is installed lower than lower than indoor unit DSW2 DSW2 indoor unit DSW2 DSW2 DSW2 sten nm sh ed rites 0 5 m Setting before 0 5 m Setting before 30 50 m shipment shipment e Maximum piping length according to the unit Maximum piping length Mark Unit Bae nf Actual piping length Equivalent piping length RASC 3HVRNE lt 30m lt 45m L RASC 5 10 H V RNE
108. cated on the DIP IPM is OFF Do not touch the electrical components when LED201 Red is ON in order to avoid an electrical shock Do not touch the electrical components of the PCB directly O NOTE When handling the PCB take care of components Do not apply excesive force to them in order to avoid damaging the motherboard and failures 1 Remove the electrical box service cover by removing the nine 9 fixing screws Disconnect all the connectors in the PCB Remove the PCB by unlocking the four 4 plastic holders Pull out the PCB from the PCB plate 226 SMGB0043 rev 1 04 2010 Servicing Service Manual Screw Location of plastic holders Servicing Service Manual 9 1 13 Removing electrical components 1 A DANGER Electrical hazard Risk of death Check that the LED201 red located on the DIP IPM is OFF Do not touch the electrical components when LED201 Red is ON in order to avoid an electrical shock Do not touch the electrical components of the PCB directly 7 NOTE When handling the PCB take care of components Do not apply excesive force to them in order to avoid damaging the motherboard and failures Remove the electrical box service cover by removing the nine 9 fixing screws Remove the screw fixing the PCB plate and turn it towards the front side To remove the electrical components Re
109. cause of the alarm the compressor may be seriously damaged Alarm code Content of abnormality 02 Tripping of protection device in outdoor unit 07 Decrease in discharge gas superheat 08 Increase in discharge gas temperature 41 Cooling overload 42 Heating overload 47 Low pressure decrease protection activating You can check these alarms using the check mode 1 Follow the action that is indicated in each alarm chart You can clear these alarms only by turning OFF the main switch to the system However you must pay careful attention before starting because there is a possibility of causing serious damages to the compressors 175 SMGBO0043 rev 1 04 2010 Troubleshooting HITACHI Inspire the Next Service Manual 7 2 3 Troubleshooting in check mode FANIHIGH SWING SET TEMP Use the OK switch of the remote control in the following cases COOL MED SN pit BB TR 1 When the RUN LED is flickering HEAT b al IU DRY AC EAS SERVICE ABN F HRA 2 To trace back the cause of the malfunction after restarting from the AUTO vENTIHSTRG HIE TRUNITCHECK stoppage while the RUN LED is flickering dad ui 3 To check during the normal operation or during the stoppage 4 To monitor the inlet air temperature and the discharge air temperature MODE FAN SPEED TIMER Ai VENTI LOUVER DAY SCHEDULE C Ves Check mode 1 C
110. ch main part sssssssssesee nemen 187 7 3 1 Self checking procedure of PCB using the remote control switch ssseene 187 7 3 2 Self checking procedure of the Remote Control Switch 189 7 3 8 Checking procedure of other main parts sse eme enne nnne 191 123 SMGBO0043 rev 1 04 2010 Troubleshooting HITACHI Inspire the Next Service Manual 7 1 Initial troubleshooting 7 1 1 Checking using the 7 segment display e Simple checking procedure using the 7 segment display 1 Turn on all the indoor units which are connected to the outdoor unit 2 Turn on the outdoor unit 3 Auto addressing starts outdoor unit printed circuit board PCB 1 During the auto addressing you can check the following items using the 7 segment display of the outdoor unit a Disconnection of the power supply to the indoor unit b Duplication of the indoor unit number Normal case The 7 segment display of the outdoor unit is not indicated Abnormal case If there is something wrong the 7 segment display of the outdoor unit displays the following indications Cause Indication Remarks a The indoor units are not supplied r continues to flash after 30 seconds with power Li b Disconnection of the operating line r continues to flash after 30 seconds between the outdoor units and the Li t indoor units x E c Duplicated settings of the indoor unit number on the rotary swi
111. check joint 4 Disconnect the connector in the electrical box PCN13 PSC PCN8 PSH and disconnect Float Switch connector RPR Relay board and Magnetic Switch terminals 5 Disconnect the terminals from the pressure switches 6 Cut the high pressure switch and control pressure switch from the brazing neck using a burner 9 2 7 Removing reversing valve coil A DANGER Electrical hazard Risk of death Check that the LED201 red located on the DIP IPM is OFF Do not touch the electrical components when LED201 Red is ON in order to avoid an electrical shock Do not touch the electrical components of the PCB directly 1 Revome the piping service cover by removing the three 3 fixing screws Pull up and remove the cover using the handle 2 Disconnect the PCN6 connector on the PCB in the electrical box 3 Remove the reversing valve coil by removing the screw fixing the coil 233 SMGB0043 rev 1 04 2010 HITACHI Inspire the Next PSC PSH Reversing valve coil Screw HITACHI nid Inspire the Next Service Manual 9 2 8 Removing expansion valve coil A DANGER Electrical hazard Risk of death Check that the LED201 red located on the DIP IPM is OFF Do not touch the electrical components when LED201 Red is ON in order to avoid an electrical shock Do not touch the electrical components of the PCB directly 1 Revome the
112. ck the temperature The setting condition is showing below Setting condition Contents of parts 00 Not available 01 Available Fan lock F This function is used to lock the fan The setting condition is showing below Contents of parts Setting condition 00 Not available 01 Available 105 SMGBO0043 rev 1 04 2010 Available optional H ITACHI functions Inspire the Next Service Manual Louver lock 4 This function is used to lock the louver The setting condition is showing below Setting condition Contents of parts 00 Not available 01 Available Cooling temperature range limit F This function is used to set the the temperature range in cooling mode This function allows reducing the cooling range to configurate trough the remote control switch The setting condition is showing below Setting condition Contents of parts 00 Not available Working range is reduced in 1 C 01 increased the lower limit in 1 C Available 10 Working range is reduced in 10 C increased the lower limit in 10 C Example 19 C 30 C l 19 30 C Temp range at cooling standard e R a enc 20 30 C Min at cooling 1 C ee lg lt lt lt lt ___ __ gt l l 10 C 29 30 c Min at cooling 10 C le l I t possible to set temperature by remote controller SW lt gt impossible
113. contacts for comp Check the surface of each contact L1 L2 and magnetic switch CMC1 faulty L3 by viewing ie ere any voltage abnormalit Check to ensure that voltage imbalance is y 9 Y smaller than 3 Please note that power 13 among L1 L2 L2 L3 and L3 A L1 Source voltage must be within 380V or 220V 10 14 Is the comp oil acidified during Check to ensure that the oil color is not compressor motor burning black 121 SMGBO0043 rev 1 04 2010 HITACHI Inspire the Next Test run Service Manual Additional information for Check list on compressor Check item 1 amp 2 Additional information mechanism of compressor failure The liquid refrigerant return volume to the compressor is controlled by the discharge gas temperature Td when compressor is operating If Td thermistor is disconnected the liquid refrigerant return volume will become small by detecting the temperature even if the actual discharge gas temperature is high Therefore this abnormal overheating by detecting the temperature operation will result in insulation failure of the motor winding 3 amp 4 Overcurrent control operating frequency control is performed by detecting current by the PCB2 In this case winding insulation failure will occur since control is not available in spite of actually high current 5 amp 6 The current sensor checks phase and adjusts output electrical wave in addition to the above m
114. ct wiring Possible failure of PCB Pay attention to the connection of the operating line 57 SMGBO0043 rev 1 04 2010 Electrical wiring HITACHI Inspire the Next Service Manual e RASC 3 5 HVRNE Power source from the outdoor unit to the indoor unit Independent power source of outdoor unit and indoor unit Outdoor unit Outdoor unit of system no 0 of system no 0 mmi mnn ele E ip Operating line L Operating line twisted h K shielded pair cable or LJ twisted shielded pair cable A a shielded pair cable SELB s or shielded pair cable SELB GASET DCEV fnon Bole I DC5V non pole transmission o on p MES ELB transmission jen system 7 H Link system 3 cB pest ace Link system 7 E En fa y AA E 1 N XL i 1 N STEET 230V 50 Hz IHEHRE RE EAR 230V 50 Hz 3 MIEHBERE Eris N 3 2 A 8 No 0 TB No 1 Te Noo TB No 1 TB Indoor unit Indoor unit Indoor unit Indoor unit Remote R control Pa ili c 5 contr switch 2300 50 Hz i switch In RASC 3 SHVRNE Max 2 indoor units for refrigerant cycl
115. ction Phenomenon Cause Check item Turn OFF main switch Clogging of heat exchanger Remover clogging Check for dust on air filter Remove dust Insufficient air flow to heat exchanger of outdoor unit Check the service space Secure service space Check fan speed Outdoor fan cooling Indoor fan heating Replace fan motor if faulty d nol airaarie Make good circulation ceiling Remove short circuited air Excessively high temp air to TN outdoor unit heat exchanger Check for short circuited air Check for other Rasc Unit Remove Rasc Unit Faulty pressure Measure discharge pressure Switch Check continuity after Replace it if faulty decreasing of pressure Faulty high Insufficient M l Repair looseness pressure switch contacting cassure resistance Dy tester Replace connector burn Check connections Repair connections Activation of high pressure Switch due to excessively high Overcharged refrigerant Charge refrigerant correctly discharge pressure during cooling operation Check cycle operating temp Recharge refrigerant after Check ambient temp and vacuum pumping Mixture of non condensable gas in pressure refrigerant cycle Clogging of discharge piping Check for clogging Remove clogging Check for clogging Remove clogging Check connecting wiring and Replace connector connectors Faulty or malfunction of expansion Check operating soun
116. d eh is the same as the indication during check mode 3 Is current sensor faulty 1 Check to ensure that indication A1 and A2 are 0 during compressor stopping 4 IS current ne part on 2 Check to ensure that indication A1 and A2 are PCB2 faulty not 0 during compressor running 5 l the direction of current Check the direction gt by viewing Are power source wires U and 6 V inserted correctly into current sensor Check to ensure that wires are correctly inserted Is exp valve MV1 correctly connected Is exp valve coil MV1 correctly connected Check to ensure that MV1 to CN5A is correctly connected Check to ensure that each coil is correctly mounted on the valve Are the refrigeration cycle 9 and electrical wiring system incorrectly connected Check to ensure that refrigerant is flowing into indoor units by operating one refrigerating cycle only from the outdoor unit Is opening of exp valve Check the following by the check mode of outdoor units 1 Liquid pipe temp TL lt air intake temp Ti magnetic switch CMC1 faulty 1d completely closed locked during cooling operation 2 Liquid pipe temp TL gt air intake temp Ti during heating operation Check to ensure that liquid pipe temp is lower Is opening of exp valve fully than air intake temp of stopping indoor unit when 11 opened locked other indoor units are operating under cooling operation
117. d CB2 DCL or CMC No pe Be extremely carefull because of the high voltage Is the DC voltage over 460V Fu CE c cM c E d oc c US Yes Faulty Check capacitors CB1 2 Connect correctly No Normal Replace the capacitors Capacitors have high voltage Be extremely carefull 1 Faulty PCB2 Replace it 1 If the capacitor has a high voltage perform the high voltage discharge procedure Refer to section 7 3 4 2 Checking procedures of the diode module are displayed in item 7 3 4 148 SMGBO0043 rev 1 04 2010 Check the Wiring PCB2 and capacitors CB In case the wiring is correct replace the PCB2 Troubleshooting Service Manual HITACHI Inspire the Next Alarm code Description i H i Decrease of discharge gas superheat This alarm code is indicated as follows under 300pls at cooling operation for 30 minutes under 70pls at heating operation for 30 minutes The RUN LED flickers and ALARM is displayed on the remote control switch The unit number the alarm code and the unit code are alternately displayed on the set temperature section The unit number and the alarm code are displayed on the display of the RASC unit PCB The temperature on the top of the compressor is less than the target and also the I U expansion valve opening is The temperature on the top of compressor is
118. d Ue De apo ELET EENE 235 9 2 11 REMOVING solenoid valve conie HER Eee IER E ERR ER es ERI REX RO SERERE I rtR RR a HERR PEERS 235 9 22 12 aai due 236 9 2 13 Removing electrical components ssssssssseeneeenn ene nennen nnne nennen nene enn nennen 237 9 3 Collecting refrigerant for replacing indoor unit 238 10 Main parts ceasar aaa ea nnne nn nnns nnne senes nnne nnne nnne nnne enne nnne 239 LOHN TE 240 10 171 Specifications Of IRIVerter cocci roi tt conus tente tan UE pe RC Ea ga FEE Ene p ne t ra Eo Phu REEF RIOB NIC Pme x antaii 240 1051 2 Inverter time Catt eee 242 10 1 3 Protective eim He 243 JOUET DFeim 244 19 2 oM ahdiccenenaine 245 10 SMGBO0043 rev 1 04 2010 Contents HITACHI Service Manual Inspire the Next 10 3 Electronic expansion valve ssssssssssssssseseseeeeenen eene nme nennen nennen neeren nennen 247 O 10 3 1 Electronic expansion valve for outdoor unit ssseeeeem eene 247 10 4 High pressure protection device sssssssssssssseeneeeeeee ne ener nnnm nnns 248 10 5 Noise EuccIQ B 249 10 6 Capacitor CB1 CB2 o rainira noiera naan e iN ea a enne nnnm nenne ener rennen enne rne 252 107 coge
119. d from Replace coil valve coil Check discharge gas thermistor Replace thermistor Check attaching state 2 Reattach thermistor discharge gas thermistor Liquid line stop valve of gas line Check stop valves Fully open stop valve stop valve are not in operation Replace outdoor unit Check expansion valve expansion valve Locking up outdoor unit expansion actuation valve closure NOTE This alarm code is indicated when the outdoor unit protective device is activated by high discharge pressure during cooling operation Accordingly when this alarm code is indicated there is high possibility of high pressure switch actuation and the above troubleshooting actions are based on such cases 165 SMGBO0043 rev 1 04 2010 HITACHI Inspire the Next Troubleshooting Service Manual Alarm code Description Lit Heating overload UL high pressure switch will be activate The RUN LED flickers and ALARM is displayed on the remote control switch The unit number the alarm code and the unit code are alternately displayed on the set temperature section The unit number and the alarm code are displayed on the display of the outdoor unit PCB temperature of indoor unit is more than 55 C and top of compressor temperature is more than 95 C This alarm code is indicated when the protection device is activated at following condition Liquid refrigerant pi
120. d models are listed in the Eurovent Certification Online Directory www eurovent certification com HITACHI Inspire the Next SMGB0043 rev 1 04 2010 Printed in Spair
121. devices can be activated 94 SMGB0043 rev 1 04 2010 Available optional Service Manual functions H ITACHI Inspire the Next 5 2 Available optional functions through the remote control switch PC ART 5 2 1 Optional function setting The remote control switch is changed to the optional setting mode by the following procedures Programming with the PC ART The optional signals are programmed using the remote control switch Programming and setting mode Make sure the unit is stopped Press the OK and the RESET switches on the remote control switch simultaneously more than 3 seconds and the remote control switch is changed to the field setting mode The SERVICE indication is displayed and Zi flickers below it SET TEMP zn LL Selecting SERVICE 7 When in the programming and setting mode press the TEMP or the TEMP amp switch and the number that flickers below the SERVICE indication will change 4 gt 42 Set the flickering number to 7 maintain it during 7 seconds or press the OK switch and the remote control switch will change to optional setting mode Selection of indoor unit In SERVICE 01 selection mode the indication of the remote control switch will change as shown in the figure below 5 Q The i P indication is activated O The address of the indoor unit for which the optional function is to be set is indicated in the segments
122. display of the Outdoor unit PCB This alarm code is displayed when the thermistor is short circuited less than 0 24 kO or cut greater than 840 kQ during the cooling process or the heating process The system is automatically restarted when the fault is removed Is THM3 connected to of PCB intake Yes Is the resistance of THM3 between 0 24kO and 840kO Faulty PCB Phenomenon Faulty freeze protection thermistor 153 Faulty PCB No Connect it Faulty thermistor Freeze protection thermistor THM3 In case of 4 way Refer to the thermistor cassette Cause Fault Incorrect connection resistance in alarm 11 Check item Check the resistance Check the connection Replace PCB and check the operation SMGBO0043 rev 1 04 2010 Action Turn OFF the main switch Replace the thermistor if faulty Repair the wiring and T connections Replace PCB if faulty HITACHI Inspire the Next Troubleshooting Service Manual Alarm code Description Lt Abnormal operation of the thermistor for the indoor unit heat exchanger gas 4 pipe temperature gas piping thermistor is removed The RUN LED flickers and ALARM is displayed on the remote control switch e The unit number the alarm code and the unit code are alternately displayed on the set temperature section The unit number and the alarm code are displa
123. door units other obstacles such as the growing grass and the pieces of paper which might restrict the airflow Piping connection Leakage Check for the refrigerant leakage at the piping connection Cabinet Stain and lubrication Check for any stain and any lubrication Remove the stain and the lubrication Fixing screw Check for any loosened screw or any lost screw Fix the loosened screws and the lost screws Insulation material Check for any peeled thermal insulator on the cabinet Repair the thermal insulator Electrical equipment Activation Check for an abnormal activation of the magnetic contactor the auxiliary relay the PCB and others Line condition Pay attention to the working voltage the working amperage and the working phase balance Check for any faulty contact that is caused by the loosened terminal connections the oxidized contacts the foreign matter and other items Check the electrical insulation resistance Control device and protection device Setting Do not readjust the setting in the field unless the setting is maintained at a point that is different from the point listed in the section 4 Safety and control device of SM For Outdoor unit 1 Compressor Sound and vibration Check for abnormal sounds and vibrations Activation Check that the voltage drop of the power supply line is within 1596 at the start and within 296 during the operation Reverse valve Activ
124. e DSW5 Transmission setting of end terminal resistance Function Setting position Remarks Setting before shipment Cancellation Setting before shipment pin 1 setted ON In case of having 2 or more RASC units connected to the same H Link set for the second unit pin 1 OFF If only one RASC unit is used no setting is required DSW6 Power source setting Jumper setting 56 Function Setting position Remarks RASC 3 5 HVRNE 220 240V M setting before 12 shipment No setting is required RASC 10HRNE 380 415V Ju setting before 12 shipment Jumper Function Remarks JP1 Cut Anual cooling mode JP5 Cut Simultaneous defrost prevention SMGB0043 rev 1 04 2010 Electrical wiring Service Manual Electrical wiring HITACHI Service Manual Inspire the Next 3 3 Electrical wiring between indoor unit and outdoor unit Connect the electrical wires between the indoor unit and the outdoor unit as shown below Check to ensure that the terminal for power source wiring terminals L1 to L1 and N to N of each terminal board AC230V and intermediate wires Operating line terminals 1 to 1 and 2 to 2 of each terminal board DC5V between the indoor unit and the outdoor unit are connected correctly If not some component will be damaged Follow local codes and regulations when performing electric
125. e In RASC 3 5HVRNE Max 2 indoor units for refrigerant cycle TB Terminal board cB Circuit breaker ELB Earth leakage breaker Field wiring Field supplied yx Optional accessory e RASC 10HRNE Independent power source of outdoor unit and indoor unit Outdoor unit of system no 0 Power source from the outdoor unit to the indoor unit Outdoor unit of system no 0 apu 2 mmm 9 5 7 Opes Lu Mcd twisted shielded pair cable shielded Pur able SEB L or shielded pair cable 4 P 3 3 ELB T DCS5V non pole Sy e DCSV non pole transmission EE cm T cr ELB transmission H LINK system Hs H Link system GcB 2 cB lA 7 m ELB x o L2 N 1 2 o i2 N 1 2 A 8 6 il2lale o o i2 N 112 A o i2 u Noo m Indoor unit i oH EER Noo TB Indoor unit als E Not Te Indoor unit No1 TB Indoor unit 3 IN 3 N 400V 50 Hz 400V 50Hz Remote 4 Remote x w control a yy control switch 230V 50 Hz switch Ss V Max 4 indoor units for refrigerant cycle Max 4 indoor units for ref
126. e Manual 5 3 Available optional functions through the remote control switch PC ARH 1 Switching to optional setting mode Press the MODE and FAN SPEED buttons at the same time for at least 3 seconds when the air conditioning unit is off The screen will change as shown in the diagram when optional setting mode is activated Press the TEMP Vv 2 Changing options and setting elements button to select setting Press V TEMP to change certain setting elements when elements shown To change setting options press the TEMP button Consult the following table for setting elements and options Press the TEMP A 3 Cancelling the function selection mode button to change the To return to normal mode from 2 press the MODE and setting options FAN SPEED buttons at the same time Optional setting elements Code Element Setting 00 Normal temperature setting 4 C hi Cancelling heating temperature setting 01 Cancelled temperature setting 02 Temperature setting 2 C 1 gt 00 Off ILLI as Automatic cooling heating mode 01 On 00 Off Lh Indoor fan increase 01 High 1 02 High 2 00 Off ra Remote control thermostat 2 01 Switch from indoor inlet thermistor to remote control thermostat cH 02 Unit control using the average value of the indoor inlet thermistor and the remote control thermostat Fg Set
127. e above mentioned items If fault occurs the output electrical wave becomes unstable giving stress to the motor winding resulting in winding insulation failure 7 amp 8 During a cooling operation SH is controlled by MV of each indoor units During a heating operation Td is controlled by MV1 If expansion valves are incorrectly connected correct control is not available resulting in compressor seizure depending on liquid refrigerant returning conditions or motor winding insulation failure depending on overheating conditions 10 If the refrigeration cycle and electrical system are incorrectly connected abnormally low suction pressure operation is maintained or abnormally high discharge pressure operation is maintained resulting in giving stress to the compressor since their correct control is not available If the expansion valve and electrical system are incorrectly connected abnormally low suction pressure operation is maintained or abnormally high discharge pressure operation is maintained resulting in giving stress to the compressor since their correct control is not available 11 The compressor may be locked due to the liquid return operation during the cooling operation 12 In the case that the contacting resistance becomes big voltage imbalance among each phase will cause abnormal overcurrent 13 In this case overcurrent will occur efficiency will decrease or the motor winding will be excessivel
128. e as rated current Yes No Is current applying to Restart operation after crankcase heater applying current Yes Yes Is refrigerant charged Charge refrigerant a excessively correctly No Is lock of indoor expansion valve Yes opened at cooling operation Restart expansion Is lock of Outdoor expansion valve valve opened at heating operation No p Check the compressor Is pressure excessively high Check the stop valves and expansion valve Check for clogging at 1 Perform the high voltage discharge work by referring heat exchanger to the item 7 3 4 before checking and replacing the inverter PCB R Check the fan 170 SMGBO0043 rev 1 04 2010 Troubleshooting Service Manual HITACHI Inspire the Next Alarm code Description Abnormal operation of the current transformer 0A detection The RUN LED flickers and ALARM is displayed on the remote control switch The unit number the alarm code and the unit code are alternately displayed on the set temperature section The unit number and the alarm code are displayed on the display of the Outdoor unit PCB This alarm code is displayed when the current transformer is abnormal 0A detection or 5A alarm condition and the alarm has more than three occurrences in 30 minutes Condition of activation When the frequency of the c
129. e burner flame when brazing the connection pipes 9 For brazing the compressor connection pipes first cool down the compresor piping side covering it with wet clooth Then brazing material will not enter into the compressor If the brazing material enters the compressor it will cause compressor failures 10 Reassemble the parts in the reverse order of the indicated removing procedures Tighten the screws U V and W for compressor wires with 2 5N m Fix the lead wire firmly 7 NOTE Fix the lead wire for the compressor firmly using a cable tie to aviod contacting the metal sheet sharp edges and the high temperature piping A WARNING Risk of fire Smokes and other damages may occur All compressor pipes must be brazed to be connected to the refrigerant circuit Ensure that all the sourrounding is free of flammable objects and liquids when performing piping brazing work 232 SMGBO0043 rev 1 04 2010 ff ir 1 Oil heater Terminal box Details for compressor terminals Fix it with screw Compressor wires 3 wires Servicing Service Manual 9 2 6 Removing the high pressure switch PSH and pressure switch for control PSC 1 Remove the eight 8 fixing screws of the inlet protector net 2 Remove the electrical service cover by unscrewing the three 3 fixing screws Pull up and remove the cover using the handle 3 Collect the refrigerant from the
130. e check valve is broken Check for a leakage of the check valve on the discharge gas side DSW4 4 enforced stoppage of the compressor ON so that the compressor will not run although the running command is sent from the remote control switch Check that variation of Ps on the outdoor unit PCB is 17 seconds Make sure that the Ps increase is within 0 03 Mpa in two minutes after the Ps increase at the stoppage during approximately five minutes Also make sure that Pd gt Ps 0 03 MPa or Ps smaller a 2 minutes Time When you stop the compressor for replacing You can check the leakage of the check valve by means of the Ps variation because the SVA opens so that the discharge gas side of the inverter compressor can connect to the low pressure side 0 03 Mpa 2 minutes is within the permissible limits for the check valve on the discharge gas side The leakage of the check valve may cause an incorrect brazing due to the gas pressure at the brazing of the discharge piping If the compressor replacing mode is performed again set the DSW4 4 to OFF and keep the DSWA 4 at the OFF side during ten minutes Then start according to the procedure No 6 10 Collect the refrigerant by means of the refrigerant collection Perform either A or B depending on the process 10 A The leak rate at the process 10 is within the specification Collect the refrigerant only at t
131. e damage The insulation for the drain pipe must be selected in order to ensure that the vapor is sealed and in order to prevent the condensation forming 2 2 Piping work connection considerations 2 2 1 Piping materials 1 In order to avoid supply problems in terms of local regulations and quality prepare locally supplied copper pipes 7 NOTE Incase of using copper pipes for piping sections bigger than 19 05 mm 3 4 inches flaring work cannot be performed If necessary use a joint adapter Select clean copper pipes Make sure there is not dust and moisture inside Blow the inside of the pipes with oxygen free nitrogen to remove any dust and foreign materials before connecting the pipes After connecting the refrigerant piping seal the open space between Knockout hole and refrigerant pipes by using insulation material as shown below 28 SMGBO0043 rev 1 04 2010 Piping installation Service Manual HITACHI Inspire the Next Insulation material f y Field supplied Unit side y O refrigeration pipe E S Insulation material Insulation material A CAUTION Several hazards due to contamination or impacts Can cause serious injury Do not use a saw and a grindstone or other tools which cause copper powder When cutting p
132. e eee al TFA TRO ga PEA oi al T iil ii 1d5d SETI SO X ig m 88 QD dojiossaiduioy Burdig avJ opino 3 6WHL SWHL WHL tal LAW jap Moe 3NHAH S 9SVM 10 Wesbeip BULIM Je2u329 3 L S E 60 SMGB0043 rev 1 04 2010 HITACHI Inspire the Next CAERE EAEAN Taaa aadd Electrical wiring Service Manual
133. e enne nnns 60 3 5 1 Electrical wiring diagram for RASC 3 S HVRNE sse een nennen eene nennen 60 3 5 2 Electrical wiring diagram for RASC 10HRNE sse enne nnne ren nennen 61 A QOO SUSIBITI ccu tton recess leitet e tL So d IE IN M RUM d DU M IEEE 63 4 1 Device control system 5 inicia estie dee teu ex Hike db eee tu eta Re died nee 64 4 2 RASC 3 10 H V RNE PCB 5 5 reete tinte eate pene ERE Tene Sex Bree e HEREIN IEEE ERE ERE Ye de PERDERE 66 4 3 Protection and safety control cnc denen tete t entree taa ee eaa eR E e ERR CERRAR due 67 4 4 Standard operation sequence sssssssssssssssssssessereerene nennt nnne n nen eneme nennen nenne 68 Lc neve Beeren 68 4 4 2 Dry No s r lilo REM 70 44 3 Heating operatlon i etr EHE HEIL cade S VIF RH ESL OM uL SEHE ONERE Ie Ea e ERE ante inet 72 4 4 4 Defrost operation control sssssssssssessssseseeeennnenenenn nnne nennen cs een nennen nnne i i a isis isi iare e senes 74 4 5 Standard control functions nenne ennemi nn nennen nnne 75 4 5 1 Freezing protection during cooling process or dry operation sssee m 75 4 5 2 Prevention control for excessively high discharge gas temperature ssssssssssssess 76 4 5 3 Outdoor unit electrical expansion valve control emnes 77 4 5 4 Activation of protection device control
134. e falls down to 10 C in cooling operation Compressor stop In this case stoppage code N 24 is given 92 SMGB0043 rev 1 04 2010 Available optional Service Manual functions H ITACHI Inspire the Next Optional functions jumper Fixing cooling mode When this function is activated the operation mode is fixed in cooling mode Thermo ON is only available for COOL or DRY mode at indoor unit The minimum temperature is 5 C To activate this option the jumper JP4 of the outdoor unit PCB1 must be cut Alternative defrost mode When one outdoor unit is connected with one H LINK system with other outdoor units is under defrosting the other outdoor units defrosting is cancelled After one outdoor unit defrosting is completed another outdoor unit starts defrosting operation To activate this option the jumper JP5 of the outdoor unit PCB1 must be cut R407C piping If you are using conventional R410A refrigerant instead of R407C refrigerant pressure will be increased To avoid pressure increase will activate this function To activate this option the jumper JP6 of the outdoor unit PCB1 must be cut 93 SMGB0043 rev 1 04 2010 Available optional H ITACHI functions Inspire the Next Service Manual 5 1 6 Outdoor units available optional functions Optional functions Optional function Explanation This function regulates the outdoor unit consumption to 50 70 or 100 If the required power is above t
135. e fuse Short circuited wire to ground Measure the insulation resistance Remove the short circuit to ground and replace the fuse Faulty comp motor Measure the resistance between the wires and the insulation resistance Replace the comp and the fuse Faulty outdoor unit fan motor Measure the resistance between the wires and the insulation resistance Replace the outdoor unit fan motor and the fuse Blown out fuse for control circuit or activation of outdoor unit breaker Short circuit between wires Check the insulation material for breaks Remove the short circuit and replace the fuse Short circuit of the control circuit to ground Measure the insulation resistance Remove the short circuit and replace the fuse Faulty solenoid coil for the magnetic switch for the comp motor Measure the resistance of coil Replace the magnetic switch and the fuse Failure of the outdoor unit fan motor Measure the resistance between the wires and the insulation resistance Replace the outdoor unit fan motor and fuse Faulty transformer Measure input voltage Replace transformer Disconnected wires insufficient contacting or incorrect connection Between outdoor unit and indoor unit Power source wiring for the outdoor unit Check the continuity of the wires Check for looseness of the connection screws Check the terminal nos Replacing wires repairing and
136. e heat load Check for hot air near the ceiling heating Reduce the heat load or use a bigger unit Provide good circulation Check for short circuited air heating Remove the short circuited air Check for other Rasc Unit Remove the Rasc Unit Faulty high pressure Faulty pressure Measure the discharge pressure Check the Replace the pressure switch switch switch continuity after the if faulty decrease of the pressure Insufficient Measure the resistance Fix the looseness contacting using the tester Replace the connector Incorrect connection Check the connections Repair the connections 139 SMGBO0043 rev 1 04 2010 HITACHI Inspire the Next Troubleshooting Service Manual Faulty or malfunction of the expansion valve Check the connect wiring and the connectors Action Phenomenon Cause Check item Turn OFF the main switch Check for clogging Remove the clogging Replace the connector Check the operation sound from the coil Replace the coil Check the discharge gas thermistor Replace the thermistor Check the attaching state of the discharge gas thermistor Reattach the thermistor Activation of the high pressure Switch due to the excessively high discharge pressure Faulty gas bypass solenoid valve Check for clogging Replace the gas bypass solenoid valve Overcharged refrigerant Mixture of the non conde
137. e reverse order of removing procedures contained in this chapter When SFV is removed fix it according to the section Removing the Reversing Valve and the Solenoid Valve contained in this chapter 224 SMGB0043 rev 1 04 2010 Servicing Service Manual Reversing valve Cover by wet cloth Reversing valve Servicing HITACHI Service Manual Inspire the Next 9 1 11 Removing solenoid valve 1 Remove the six 6 screws of the side cover Slide the cover downward Remove the electrical service cover by unscrewing the nine 9 fixing screws Slide the service cover downward and remove it using the handle Collect the refrigerant from the check joint according to the section Removing compressor in this chapter Remove the solenoid valve coil by unscrewing the fixing screw Remove the brazing and flare nuts Using a blowtorch and previously cooling the pipe side with wet cloth in order to avoid brazing material entering the reversing valve Perform the brazing to remove and reassemble the solenoid valve Protect the connecting wires and pipe insulation from the brazing flame Remove the flare nuts with two spanners to avoid twisting Reassemble the parts in the reverse order of removing order of removing procedures 225 SMGB0043 rev 1 04 2010 HITACHI Inspire the Next 9 1 12 Removing the PCB A DANGER Electrical hazard Risk of death Check that the LED201 red lo
138. e running This results in a different setting of the total indoor unit capacity in the same refrigerant cycle Countermeasure All the main switches for the indoor units were always ON 11 6 Not well cooling due to insufficient installation space for outdoor unit or inlet outlet air bypass Question and answer for the field work Example 5 Not cooling well due to insufficient installation space for outdoor unit or inlet outlet air bypass Phenomenon Cooling operation was well performed through the intermediate season However the cooling operation was not well available when the outdoor temperature was higher than 35 C Cause Hot discharge air re circulation In this case though the outdoor temperature was 35 C the actual suction air temperature was nearly 50 C and protection system from excessively high suction pressure was activated the frequency of the compressor was decreased and the cooling capacity was also decreased accordingly Countermeasure Ensure that inlet and outlet is not bypassed use grilles in opposite directions if necessary Ensure that intlet and outlet air in opened spaces never near walls 11 7 Caution in case of refrigerant leakage The installers and those responsible for drafting the specifications are obliged to comply with local safety codes and regulations in the case of refrigerant leakage 11 7 1 Maximum permitted concentration
139. e the Next Service Manual 1 1 2 Center of gravity When the unit is lifted manually using the handles do not remove the wooden base from the unit to prevent its overturning Pay attention to the center of gravity shown in the figures below 480 1100 265 1 E A Is p S EE ae o i e l mA o m o El U RASC 3 5 HVRNE RASC 10HRNE O gt Air inlet O gt Air outlet 1 1 3 Installation space Initial check Installation on the floor Installation in the ceiling NOTE O All measuring units are in milimetres mm 23 SMGB0043 rev 1 04 2010 H ITACH I Units installation Inspire the Next OOOO Service Manual 1 1 4 Place provision Concrete foundation Installation on the floor Foundation shall be on levelled surface and it is recommended to be 100 300mm higher than ground level Install a drainage around foundation for smooth drain When installing the unit fix it by M10 anchor bolts Use vibration proof rubber approx 60 degree between the unit and foundation Drain water might turn into ice on cold weather areas Therefore when installing the unit on a roof or a veranda avoid to drain on a public area since it may become slippery Check to ensure that the foundation is water proof In other case apply water proofing measures Install the unit so that
140. e unit number and the alarm code are displayed on the display of the Outdoor unit PCB This alarm code is displayed when the thermistor is short circuited less than 0 24 kQ or cut greater than 840 kQ during the cooling process or the heating process The system is automatically restarted when the fault Is THM2 connected to intake of PCB Yes Is the resistance of THM2 between 0 24kO and 840kO Faulty PCB Phenomenon Faulty air outlet thermistor Faulty PCB 152 No Connect it Faulty thermistor Cause Fault Incorrect connection SMGB0043 rev 1 04 2010 Check item Check the resistance Check the connection Replace PCB and check the operation Indoor unir air inlet thermistor THM2 Ww In case of 4 way cassette Action Turn OFF the main switch Replace the thermistor if faulty Repair the wiring and connections Replace PCB if faulty Troubleshooting Service Manual HITACHI Inspire the Next Alarm code Description 1 Abnormal operation of the thermistor for the indoor unit heat exchanger Wf liquid pipe temperature freeze protection thermistor The RUN LED flickers and ALARM is displayed on the remote control switch The unit number the alarm code and the unit code are alternately displayed on the set temperature section The unit number and the alarm code are displayed on the
141. econd HIGH uus COOL nm Lt Abnormal operation 3 Ht ATC CHECK After 1 second To next page 187 SMGBO0043 rev 1 04 2010 PAN OH ase penis s ic Hear Low BEBE RARAS DRY kic m A Bee olaren E ERT p esseri RUN zog RUNISTOP TEMP O A 96 MODE FAN SPEED TIMER RESET C VENTI LOUVER DAY SCHEDULE 1 OK OOU YSA Contents Normal Abnormality open circuit short circuit etc in circuit for Air inlet temp thermistor Discharge air temp thermistor Liquid pipe temp thermistor Remote thermistor abnormality Gas pipe temp thermistor Remote sensor Transmission of central station EEPROM Zero cross input failure Max three types of abnormal operations indicated Transmission of indoor units during this checking operation Transmission of outdoor unit Internal thermostat fan input failure PSW input failure PSH protection signal detection circuit Phase detection Transmission of inverter High pressure sensor Comp discharge gas temp thermistor Low pressure sensor Heat exchanger evaporation temp thermistor Ambient air temp thermistor HITACHI Inspire the Next Indoor unit PCB Outdoor unit PCB HITACHI Inspire the Next Troubleshooting Service Manual If you are using a wireless remote c
142. ected Sp RS i temp is the same as the indication during check mode 3 Is current sensor faulty 1 Check to ensure that indication A1 and A2 are 0 during compressor stopping 4 IS current sensing part on PCB2 2 Check to ensure that indication A1 and A2 faulty are not 0 during compressor running Is the direction of current MC 5 sensor CTU CTV reverse Check the direction gt by viewing dis peg Vand Check to ensure that wires are correctly 6 V inserted correctly into current inserted sensor 7 Is exp valve MV1 correctly Check to ensure that MV1 to CN5A is connected correctly connected Is exp valve MV1 coil Check to ensure that each coil is correctly 8 correctly connected mounted on the valve Are the refrigeration cycle Check to ensure that refrigerant is flowing into 9 and electrical wiring system indoor units by operating one refrigerating incorrectly connected cycle only from the outdoor unit Check the following by the check mode of outdoor units 10 Is opening of exp valve 1 Liquid pipe temp TL lt air intake temp completely closed locked Ti during cooling operation 2 Liquid pipe temp TL gt air intake temp Ti during heating operation Check to ensure that liquid pipe temp is lower 11 Is opening of exp valve fully than air intake temp of stopping indoor unit opened locked when other indoor units are operating under cooling operation 12 Are the
143. ection Removing compressor Remove the reversing valve coil according to the section Removing reversing valve coil Remove one 1 fixing screw for the valve mounting plate Remove the stop valve at the gas side from the valve mounting plate by removing the two 2 screws Remove the reversing valve assemblies from the 4 brazed parts where it is fixed Remove the brazing of the reversing valve and the stop valve at the gas using a blowtorch Cool down the piping side covering it with wet cloth in order to avoid brazing material entering the reversing valve Protect the connecting wires and pipe insulation from the brazing frame Remove the reversing valves from its assemblies 4 brazed parts X Perform the brazing with a blowtorchto remove and reassemble the reversing valve by cooling the pipes first with wet cloth in order to avoid brazing material entering the reversing valve Reassemble the parts in the reverse order of removing procedures contained in this chapter When SFV is removed fix it according to the section Removing the Reversing Valve and the Solenoid Valve contained in this chapter 9 2 11 Removing solenoid valve 1 Revome the piping service cover by removing the three 3 fixing screws Pull up and remove the cover using the handle Compressor Reversing valve P Cover by wet cloth T Reversing valve Perform the brazing to remove and reassemble the solenoid valve Protect the c
144. elay circuit DIP switch option circuit If this troubleshooting is performed in the system using the central station the indication of the central station may change during this procedure However this is not abnormal After this troubleshooting the memory of the abnormal operation occurrence counter which was described 188 SMGBO0043 rev 1 04 2010 Troubleshooting Service Manual 7 3 2 Self checking procedure of the Remote Control Switch Cases where the CHECK switch is used HITACHI Inspire the Next 1 If the remote control switch displays a malfunction 2 For the regular maintenance check No LCD indication Indicating 1 Turn ON the power source period sec Simultaneously press the following 1 FAN Se sg OE TT 1 three switches During the operation en i you can press the switches E 2 MODE IVENTIIH STRG 2I of TEMP Only for the cancellation O A 2 1 of EEPROM press the Font e following three switches COOL ON 000 mmn PO simultaneously during the changes of the LCD 4 The LCD changes as shown in the e eem LL E like right figure TEMP 3 1 6 After the LCD changes as shown in HEAT 7777 Ai rr the right figure the RUN i
145. em 7 3 4 3 Turn ON the No 1 switch of the dip switch DSW1 on PCB2 when restarting with disconnecting the terminals of the compressor After troubleshooting turn OFF the No 1 switch of the dip switch DSW1 on PCB2 4 Use the silicon grease provided as accessory Service parts No P22760 172 SMGBO0043 rev 1 04 2010 Troubleshooting Service Manual HITACHI Inspire the Next Alarm code Description H Temperature increase in the inverter fin The RUN LED flickers and ALARM is displayed on the remote control switch time is displayed The retry operation is performed twice Conditions When the temperature of the thermistor for inverter fin excess 100 C RASC 10HRNE 80 C RASC 3 5 HVRNE 3 times in 30 minutes this alarm is indicated and the operation is stopped In the case the occurrence is smaller than 2 times retry is performed The unit number the alarm code and the unit code are alternately displayed on the set temperature section The unit number and the alarm code are displayed on the display of the outdoor unit PCB If the alarm code 51 or 54 occurs three times within 30 minutes the alarm code which occurred for the third Yes Restart the operation Does it trip soon No Yes Is the heat exchanger of the Is thermistor short circuit or faulty Yes No Replace the dipIPM ISPM IPM 1 y Replace the thermistor gt Rem
146. ement volume 5 7 m h of the air conditioning system using the refrigerant Model Tonnes RASC 3HVRNE 1 67 RASC 5HVRNE 2 27 RASC 10HRNE 4 11 4 Pay a special attention to the place such as a basement etc where refrigerant can stay since refrigerant is heavier than air General example of application System A System B Outdoor unit Outdoor unit System A Refrigerant 60 kg Height 2 5m Gas leak detector Opening 0 075 m 1 1 Fan 2 m min 259 SMGB0043 rev 1 04 2010 Field work H ITACH l instruction Inspire the Next Service Manual Room R kg V m C kg m Countermeasure A 50 300 0 17 B 110 1 000 0 11 C 60 125 0 48 0 075 m opening D 60 125 0 48 0 075 m opening C D 60 350 0 17 E 60 100 0 6 2 m min fan linked with gas leak detector 11 8 Maintenance work For the indoor unit and outdoor unit 1 Fan and fan motor Lubrication All the fan motors are prelubricated and sealed at the factory Therefore no lubrication maintenance is required Sound and vibration Check for abnormal sounds and vibrations Rotation Check the clockwise rotation and the rotating speed Insulation Check the electrical insulation resistance Heat exchanger Clog Inspect the heat exchanger at regular intervals and remove any accumulated dirt and any accumulated dust from the heat exchanger You should also remove from the out
147. emote control MCU Indoor unit MCU JE tH E Transmission circuit Transmission A s HITACHI Inspire the Next Multiple signals Suction gas pressure sensor Single signals Discharge gas pressure sensor Eis Operation signals Thermistor for outdoor temperature Discharge gas thermistor Y prem for heating evaporation temp PSC erence rey dtd Protection circuit Y Power source o0 A D conversion circuit I 4 lt Inverter power section c 2s gt EA E Outdoor unit MCU Inverter control E MCU E Wise es Relay ame Fan control poe fece ei Relay drive SSR circuit drive circuit circuit e Y Y Y Indoor unit 9 O Outdoor unit To the transmission of the next indoor unit or the next Outdoor unit H Link e Symbol Name Symbol Name MC Motor for compressor CH Crankcase heater MIF Motor for indoor fan CT Current transformer MOF Motor for outdoor fan RVR 4 Way valve MS Motor for auto louver SVA Solenoid valve MV Electronic expansion valve PSC Pressure switch for control CMC Compressor magnetic contactor SSR Solid state relay Thyristor control 65 SMGBO0043 rev 1 04 2010 HITACHI Inspire the Next 4 2 RASC 3 10 H V RNE PCB Control system
148. ent However make sure that the stop valves are closed completely Connect the indoor unit and the outdoor unit with field supplied refrigerant piping Connect the gauge manifold using charging hoses with a vacuum pump or a nitrogen cylinder to the check joints of the liquid line and the gas line stop valve Check for any gas leakage at the flare nut connection by using nitrogen gas to increase the pressure at 4 15 MPa inside of the field supplied piping Operate the vacuum pump for 1 to 2 hours until the pressure decreases lower than a pressure of 756 mm Hg in vacuum For charging refrigerant connect the gauge manifold using charging hoses with a refrigerant charging cylinder to the check joint of the liquid line stop valve Charge the proper quantity of refrigerant according to the piping length Calculate the quantity of the refrigerant charge Fully open the gas line stop valve and slightly open the liquid line stop valve Charge refrigerant by opening the gauge manifold valve Charge the required refrigerant within the difference range of 0 5kg by operating the system in cooling Fully open the liquid line stop valve after completing refrigerant charge Continue cooling operation for more than 10 minutes to circulate the refrigerant Remove the close plate from the stop valve and hook the attached open plate at the stop valve 34 SMGB0043 rev 1 04 2010 Piping installation Service Manual HITACHI Inspire the Next
149. entioned items If fault occurs the output electrical wave becomes unstable giving stress to the motor winding resulting in winding insulation failure 7 amp 8 During a cooling operation SH is controlled by MV of each indoor units During a heating operation Td is controlled by MV1 If expansion valves are incorrectly connected correct control is not available resulting in compressor seizure depending on liquid refrigerant returning conditions or motor winding insulation failure depending on overheating conditions If the refrigeration cycle and electrical system are incorrectly connected abnormally low suction pressure operation is maintained or abnormally high discharge pressure operation is maintained resulting in giving stress to the compressor since their correct control is not available 10 If the expansion valve and electrical system are incorrectly connected abnormally low suction pressure operation is maintained or abnormally high discharge pressure operation is maintained resulting in giving stress to the compressor since their correct control is not available 11 The compressor may be locked due to the liquid return operation during the cooling operation 12 In the case that the contacting resistance becomes big voltage imbalance among each phase will cause abnormal overcurrent 13 In this case overcurrent will occur efficiency will decrease or the motor winding will be excessively heated
150. er heat loaa ngar Remove the Rasc Unit the outdoor unit Correctly charge the Excessively charged Expansion valve opening refrigerant refrigerant Excessively high discharge pressure Non condensate gas in Check each temp and Charge the refrigerant after cycle each pressure the vacuum pumping Clogging nrc Check for clogging Remove the clogging Check for clogging Remove the clogging Insufficient cooling process Check the connection Replace the connector cord and the connector Is there an operation Failure or malfunction of so nd from the coil Replace the coil the expansion valve Is the thermistor on the Replace the thermistor T compressor normal Is the thermistor Correctly install the installed correctly on the thermistor compressor Check the temp difference at the inlet and Replace the 4 way valve Malfunction or internal leakage of the 4 way valve the outlet of the 4 way valve Malfunction Check the Temp or internal leakage of the Dinerenee Detwael ine Replace the 4 way valve 4 way valve Inlet and the Outlet of 4 Way Valve Excessively low suction pressure Failure of solenoid valve Check refrigerant leakage Replace solenoid valve for bypass of solenoid valve Check the expansion Replace the failed valve of the indoor unit in expansion valve of the Discharge temp of the indoor unit is unstable the same system indoor unit 131 SM
151. er is kept in the clean condition such as the heat exchanger is rinsed with drain water Automatic fan speed control This function is used to economize the operation The fan speed is automatically controlled when the room temperature is near the setting temperature Available for PC ART and all indoor units except RPI 8 0 10 0 FSN2E Fan speed setting Fan speed High High Mid Low Mid Mid Low Low Low No charge 104 SMGBO0043 rev 1 04 2010 HITACHI Available optional functions Inspire the Next Service Manual Automatic setting for OFF timer F This function is used to turn on the OFF timer of the indoor units Setting condition Contents of parts 00 Not available OFF timer not set 01 Turns OFF after running for 1 hour Available 24 Turns OFF after running for 24 hour Remote control main sub setting F 2 This function is used to set two remote control switches in a same installation one in main mode and the other one in sub mode Setting condition Contents of parts 00 Main 01 Sub The remote control switch is set as main The remote control switch is set as sub Mode lock FE This function is used to lock the operation mode The setting condition is showing below Contents of parts Setting condition 00 Not available 01 Available Temperature lock F 3 This function is used to lo
152. erant from the check joint of the high pressure side 15 Open the liquid stop valve and the gas stop valve completely when you finish the vacuum 16 Make sure that the power is turned OFF and attach the following items the power supply wire the thermistor the crankcase heater the 63H wiring the panel and the nut 17 Setthe DSW back to the original setting Make sure that all the wirings to the compressor are connected correctly 18 Recharge the refrigerant that is collected in the If the replacement of the compressor takes more than two process by the stop valve of the liquid side during the cooling at the TEST RUN mode hours an additional change of the refrigerant is necessary Additional change replacing time 2 hours x 0 5kg 265 SMGBO0043 rev 1 04 2010 11 Hitachi Air Conditioning Products Europe S A Ronda Shimizu 1 Polig Ind Can Torrella 08233 Vacarisses Barcelona Espa a Hitachi units certifies that our product have fulfilled EU consumer safety health and environmental requirements Hitachi Air Conditioning Products Europe S A is certified with ISO 9001 by AENOR Spain for its Quality Management accordance with the standard ISO 14001 by AENOR Spain for its Environmental Management systems accordance with the standard E Hitachi participates in the Eurovent Certification Program for designation of the relevant family products the certified data of certifie
153. erature of the chamber is 60 C to 110 C 10 8 2 Principle of compression 1 The gas is inhaled from the inlet port at the outer frame of the fixed scroll 2 The gas inside of the compression space is compressed toward the center of the scroll 3 The compression space is minimum at the center of the scroll and the gas compressed at the maximum is discharged from the outlet port of at the center of the scroll 4 The above procedures suction compression discharge is repeated continuously Gas Rotating scroll 4 Compression space gt Fixed scroll Suction procedure Discharge process A i Compression process 254 SMGBO0043 rev 1 04 2010 Field Work Instruction Service Manual 11 Field Work Instruction 11 Field icu dinge me 255 11 1 Checking the power source and the wiring connection ese e 256 11 2 Burnt out compressor due to an insufficient refrigerant charge sss 256 11 3 Insufficient cooling performance when a long piping is applied ssssssssssssssss 257 11 4 Abnormally high operation sound in the ceiling type indoor unit eseeeesssse 257 11 5 Alarm Code Perecer dae eem eren uode nea Lid e HR LLL heared un edu eid ei 258 11 6 Not well cooling due to insufficient installation space for outdoor unit or inlet outlet air bypass 258 11 7 Ca
154. erature of the internal thermostat for the indoor fan motor is higher than 130 C Does the indoor No fan run Yes Yes No TANT No Is the continuity present at the Is the fan motor internal thermostat of the indoor gt hot Replace the motor fan motor i Yes No Is the connection bad at the Repair the wiring and connector the connections Is the coil resistance of the fan No motor normal Replace the motor Yes Check the indoor temperature If the indoor temperature is unusual take a suitable action to reduce the indoor temperature Phenomenon Action Turn OFF the main switch Cause Check item Activation of the internal thermostat for the indoor unit fan motor Measure the coil resistance and the insulation resistance Faulty indoor unit fan motor Replace the motor if faulty Check the continuity after the fan motor temperature decreases to room temp Replace the fan motor if Fauli there is no continuity Correct looseness Replace the connectors Measure the resistance Faulty internal thermostat using the tester Insufficient contacting Incorrect connection Check the connections Repair the connections 155 SMGBO0043 rev 1 04 2010 H ITACHI Troubleshooting Inspire the Next Service Manual Alarm code Description H Activat
155. erform the test run If this is the case the TEST RUN indication of the remote d Heating intermediate ON control switch may flicker This is season ul B iu a not abnormal Set DSW1 1 2 and 3 ON 1234 The setting of DSW1 is not required for the test run from the remote control switch 2 Forced stoppage of compressor When DSW1 4 is ON during the compressor operation Set DSW1 4 ON ON the compressor stops W H m m operating immediately and Manual OFF of 1234 the indoor unit is under the Dg not turn ON and OFF the Thermo OFF condition When DSW1 4 is OFF the compressor starts to operate after the cancellation of the 3 minute guard compressor compressor frequently 117 SMGB0043 rev 1 04 2010 Test run HITACHI Inspire the Next OOO Service Manual 6 5 Normal operation pressure You can check the excess or the deficiency of the refrigerant in comparision with the following charts and actual pressure measurement The following checking procedure is useful during test run and maintenance work Nominal value MPa RCI RCD RPI RPC RPK Pd 2 82 2 85 2 82 2 81 2 78 Cooling zs Ps 0 93 0 95 0 91 0 90 0 88 Pd 2 67 2 96 2 80 2 97 3 12 Heating Ps 0 67 0 68 0 67 0 67 0 69 i Pd 2 75 2 75 2 77 2 74 Cooling Ps 0 80 0 80 0 79 0 79 5 HP i Pd 2 59 2 71 2 60 2 49 Heating Ps 0 61 0 62 0 60 0 59 Heatin
156. erter printed circuit board and the control printed circuit board is not performed during 30 seconds the stoppage cause is d1 05 and the alarm code 04 may be displayed If the transmission between the indoor unit and the outdoor unit is not performed during three minutes the Indoor Units are stopped In this case the stoppage cause is d1 06 and the alarm code 03 may be displayed Inthe system 20 will be indicated at the diference between indoor units Countable up to 99 Over 99 times 99 is always displayed O NOTE Ifa transmission error continues for three minutes one is added to the occurrence counter The memorized data can be cancelled by the method which is explained in section 7 3 1 self checking procedure of PCB using the remote control switch 178 SMGB0043 rev 1 04 2010 Abnormal operation I dX v 15 occurrence counter im I Il Instantaneous power SS 16 failure occurrence rH rere de LL Lt Lt counter in indoor unit Transmission error occurrence counter rT rr 17 between remote L LL control switch and indoor unit Abnormal operation 18 occurrence counter on LL rn im I Lal Lt inverter Indication of automatic louver condition IT var 19 Louver sensor J Li LI 4 4 1 L r Normal Vt 1i I Abnormal Troubleshooting Service Manual Compressor press
157. esh E 2 With humidifier indication only KPI Precooling preheating period KPI E Gas sensor econofresh E Not prepared 5 Indoor fan operation timer after cooling operation sttopage This function is used to prevent dew condensation SLOW indoor fan operation for 60 minutes or 120 minutes depending on the setting while cooling operation is stopped Additionally it is effective to prevent fangs or abnormal odor E Not prepared 103 SMGBO0043 rev 1 04 2010 Available optional H ITACHI functions Inspire the Next Service Manual EQ Fan operation control at heating thermo OFF lt 2 This function is used to prevent the perception of cold draft by reducing indoor fan speed at heating thermo OFF Setting Condition Fan Operation at Thermo OFF 00 LOW 01 SLOW If THM4 remote sensor is connected the fan speed will be stop during heating thermo OFF Not prepared i Not prepared 77 Fan operation control at cooling thermo OFF A This function is used to control odor diffusion and humidity level indoor fan speed at cooling thermo OFF Setting Condition Fan Operation at Thermo OFF 00 Operation at Setting Fan Speed 01 LOW 02 SLOW Forced thermo on stoppage at cooling This function is used to stop operation by forced thermo ON when cooling operation is stopped It is effective to prevent abnormal odor because the heat exchang
158. essure side and low pressure side changes by operation mode Cooling Heating Operation Operation Check joint for gas stop valve Low pressure High pressure Check joint for piping O High pressure Low pressure Vx Exclussive for vacuum pump and Check joint for liquid stop valve 9 refrigerant charge 7 NOTE Be careful that refrigerant and oil do not splash to the electrical parts when removing the charge hoses 33 SMGBO0043 rev 1 04 2010 Piping installation H ITACHI Service Manual Inspire the Next The below figures show examples of 3 5 HP and 10HP RASC 3 5 HVRNE case RASC 10HRNE case 2 2 6 Refrigerant charge quantity A WARNING Explosion risk Can cause serious injury or death Some types of gases are extremely dangerous and can cause an explosion It is recommended that compressed air nitrogen or refrigerant be used for these types of tests Check to ensure that no pressure exists inside the stop valve before removing the flange Use refrigerant R410A in the refrigerant cycle Do not charge oxygen acetylene or other flammable and poisonous gases into the refrigerant cycle when performing a leakage test or an air tight test e Evacuation and refrigerant charge Evacuation and refrigerant charging procedure should be performed according to the following instructions The stop valve has been closed before shipm
159. esulting in clogged expansion valves etc 46 SMGBO0043 rev 1 04 2010 Piping installation Service Manual 2 7 Rasc unit factory refrigerant charge wo kg HITACHI Inspire the Next Rasc unit factory refrigerant charge wo kg is the next O U MODEL Wo Factory Charge Kg RASC 3HVRNE 2 8 RASC 5HVRNE 4 0 RASC 10HRNE 9 0 7 NOTE In case of the actual piping length is less than 5 m total refrigerant quantity should be according to the table below O U MODEL Refrigerant quantity Kg RASC 3HVRNE 2 3 RASC 5HVRNE 3 3 RASC 10HRNE 7 4 2 8 Additional refrigerant charge calculation e Seethe following table Wo e p OU MEDE Factory Charge Kg Charge less Length m Compensating Rate kg m RASC 3HVRNE 2 8 20 0 06 RASC 5HVRNE 4 0 30 0 06 RASC 10HRNE 9 0 30 0 12 e Single system Calculate piping length AL m RASC 5 10H V RNE AL Piping Length Charge less piping length a No additional charge is required AL lt b Additional charge is required AL2 W additional charge quantity AL 2 x p Indoor unit 47 SMGB0043 rev 1 04 2010 Piping installation H ITACHI Service Manual Inspire the Next Example AL 45m RASC 5HVRN 30m W additional charge quantity 45 30 x 0 06 0 9 kg RCI 5 0FSN2E e Twin system Calculate piping length
160. explosion will occur It is recommended that oxygen free nitrogen be charged for these types of tests cycle when performing a leakage test or an airtight test These types of gases are extremely dangerous Insulate the unions and flare nuts at the piping connection part completely Insulate the liquid piping completely to avoid a decrease of performance if not it will cause sweating on the surface of the pipe Charge refrigerant correctly Overcharging or insufficient charging could cause a compressor failure 2 Check for refrigerant leakage in detail If a large refrigerant leakage occurred it would cause difficulty with breathing or harmful gases would occur if a fire were being used in the room Ifthe flare nut is tigthened too hard the flare nut may crack after a long time and cause refrigerant leakage O NOTE During the brazing work a lot of oxidation film will be generated inside of the pipes if no oxygen free nitrogen gas is blown through the pipes This film will be flecked off after operation and will circulate in the refrigeration cycle resulting in clogged expansion valves etc This coud origin problems in the compressor 2 2 5 Caution of the pressure by check joint When the pressure is measured use the check joint of gas stop valve and use the check joint of liquid piping in the figure below At that time connect the pressure gauge according to the following table because of high pr
161. for timer setting time indication and ADDS is indicated below O The refrigerant cycle number of the outdoor unit for which the optional function is to be set is indicated in the segments for timer setting time indication and RN is indicated below O The indication of the setting temperature is turned OFF In previous point a press the TEMP switch or the TEMP switch of the remote control switch and the indoor unit for which the optional function is to be set can be changed 7 NOTE The indoor unit can be selected among the indoor units connected to the remote control switch If both the indication of the address and the refrigerant cycle number is AA the settings of all the indoor units are the same c After selecting the indoor unit leave the condition for 7 seconds or press the OK switch the remote control switch is changed to the optional setting mode 95 SMGBO0043 rev 1 04 2010 Available optional H ITACHI functions Inspire the Next Service Manual Changing the optional signals and setting conditions a Atthe optional setting mode the indication on the remote control switch is changed as shown below O The indications of ADDS and RN are turned OFF O The setting condition of the optional function is indicated in the segments of the time indication of the timer setting O The item number of the optional function is indicated in the segment for the set tempera
162. g operation pressure correction values for models RASC 3 5 H V RNE Operating Pressure Correction Value S 0 8 256 0 7 S dU RE a 0 5 SS 20 a SETA 40 3 SN 0 2 air pi RE 0 1 SM E uS 150 A 0 1 s 0 2 r Od 0 4 f foe 0 5 0 8 0 7 prai S 0 8 f D 0 2 o 0 1 0 Z 0 1 a 0 2 0 3 gt 0 5 10 18 Ca Outdoor Inlet Temp WB 118 SMGB0043 rev 1 04 2010 Test run Service Manual Cooling operation pressure correction values for models RASC 3 5 H V RNE Operating Pressure Correction Value HITACHI Inspire the Next a a amp 02 oy Temp 9B a7 T ai sour door eer 5 i 336 The outdoor air flow io 0 310 control is activated when 91 A the outdoor temperature Pa 290 is 300 or lower E 0 2 S 0 3 o 0 4 0 12 37 E S 0 10 re E 330310 270 Duis gt 290 3 0 06 S T 0 04 ae e 0 02 NY a gt AS a 0 0 02 ES S S 0 04 0 06 Z 2 0 08 0 10 c 0 12 0 14 15 16 17 18 19 20 21 22 23 ndoor Inlet
163. he set value the capacity of the indoor unit will be reduced proportionally to the power consumption of the outdoor Fixing the energy saving unit It can even come to a thermostatic stop if necessary This function can be configured using an external or request function internal signal depending on the needs of the installation Configuration by external signal is very useful for setting up groups of outdoor units The internal signal is useful for setting up a single outdoor unit Thermostatic stoppage order Low speed defrost Me this function is activated the indoor fan speed at defrost mode changes to slow instead of stopping the adjustment This function decreases the sound levels of the outdoor units by reducing the maximum working frequency of Low noise setting the compressor Cooling Heating Night mode low noise This function reduces the sound level of the outdoor units by decreasing the maximum working frequency of operation the compressor and the fan airflow according to the outside temperature only for cooling mode Change 9f defrost This function changes the defrosting operation conditions It is especially useful in cold areas operation conditions When the air discharge temperature of the indoor unit is less than or equal to 10 C in cooling mode the fans stop and the frequency of the outdoor unit is reduced thereby preventing any discomfort to the occupants of the room When this function is activated the compre
164. he casing Visually inspect it Adjust the position of the fan runner Faulty Installation Check that each part is tightly fixed Tightly fix each part Liquid ref compression Abnormal sound from the Adjust the suction gas temp and pressure Ensure superheat compressor P Wear or breakage of the internal comp parts Abnormal sound from the inside of the compressor Replace the compressor No heating by the oil heater Check the resistance oil heater fuse Replace the oil heater or the fuse Humming sound from the magnetic conductor Check the surface of the contacts Replace the magnetic switch Abnormal vibration of the cabinets Check each fixing screw Tightly fix each screw Outdoor fan does not operate when the compressor operates Indoor fan does not operate when the compressor operates Obstacle at the Outdoor fan Check the obstacles Remove the obstacles Watching condition for the heating process Discharge pressure does not increase higher than 1 5 Mpa due to the insufficient refrigerant Wait for the switching of the 4 Way valve 1 3 minutes Check the operation pressure 1 If the 4 Way valve does not switch check for insufficient refrigerant Add the refrigerant Disconnected wiring for the indoor fan Check the wiring Connect the wiring correctly 1 Refer to chapter 10 of TC 134 SMGBO0043 rev 1 04
165. he indoor No 4 1 Turn OFF the power before checking the connectors f 2 L Check the POHITBGIOIS 1 If not PCB and the fan motor may be damaged an run Indoor unit PCB CN550 CN500 Also the LED4 must be turned OFF before starting this check to avoid electric shock PCB1 Control PCB in Outdoor Unit PCB Indoor unit PCB Is LED4 on Yes Insuffcient voltage for PCB OFF Faulty PCB microcomputer gt Replace PCB Y No 2 Is DC power DE Sen 5V and GND of PCB 75 to 5 supply for PCB Faulty PCB is the voltage between 12V and GND of PCB Replace PCB correctly 2 11 9 to 12 8V Use a tester Is DC power supply 280V for PCB correctly 3 Is DC power supply 15V for PCB correctly 4 Is fan motor speed control command to fan motor correctly 5 Faulty fan motor Replace it 157 Note Use the following check points writen in Japanese on the PCB Refer to the figure 5V next to DSW5 12V next to HA connector GND next to IC6 do not use 280V15V GND 3 Is the voltage between CN550 1 and CN550 3 of PCB 280V 10 Use a tester Faulty PCB GND 280V 15V3 amp ICN550 Ice Indoor Unit PCB p 4 Is the voltage between CN550 3 and CN550 4 of PCB 14 8V to 15 8V Use a tester Faulty PCB gt Replace PCB Yes Faulty PCB c9 Disconnect
166. he low pressure side B The leak rate at the process 10 is greater than the specification Collect all the refrigerant of the outdoor unit side by means of the machine The discharge of the refrigerant in the atmosphere is strictly forbidden Make sure that the refrigerant is collected by the collector Keep a note of the quantity of the collected refrigerant 264 SMGBO0043 rev 1 04 2010 Field work instruction Service Manual HITACHI Inspire the Next No Procedure Remarks 11 After collecting the refrigerant remove the change Make sure that there is no pressure increase of the hose collector side of the low pressure side so that low pressure sides after collecting the refrigerant the low pressure side of the refrigerant cycle willbe Make sure that the refrigerant cycle is the atmosphere the atmosphere pressure pressure Otherwise problems such as the blowing of gas and the suction of the cutting material may occur when you are removing the compressors 12 Turn OFF the main switch of the outdoor unit 13 Perform the replacement of the compressor and the Make sure that you follow the instructions change of the refrigerant oil according to the section replacing the compressor 14 Perform the vacuum from the check joint of the If you collect the refrigerant only on the low pressure side low pressure side A in 11 You cannot perform the vacuum of the refrig
167. he remote control switch Check the remote control switch using the self check mode 1 Replace the remote control Switch if the remote control Switch is faulty Disconnected wire to PCB Failure of PCB in the indoor unit Check the connectors Correctly connect the wires and the remote control switch Failure of PCB Check PCB using the self check mode 2 Replace PCB if it failed 1 Refer to section 7 3 2 2 Refer to section 7 3 1 126 SMGBO0043 rev 1 04 2010 Troubleshooting HITACHI Service Manual Inspire the Next 7 1 4 Abnormal operation of the devices Phenomenon Cause Action Turn OFF the main switch Check item RUN LED is ON and the LCD is indicated However the system does not operate For example the indoor fan the outdoor fan or the compressor does not operate Disconnected coil Failure of the indoor unit Measure the coil resistance using the tester Replace the indoor unit fan motor Burnt out coil fan motor Measure the insulation resistance Disconnected coil Failure of the Outdoor unit Measure the coil resistance using the tester Replace the Outdoor fan motor Burnt out coil unit fan motor Measure the insulation resistance Failure of the magnetic switch for the Outdoor unit fan motor Insufficient contacting Measure the voltage between the contacting parts Replace PCB for the Ou
168. hooting Service Manual SMGBO0043 rev 1 04 2010 Code No Category Type of Abnormality Main Cause Overload cooling RASC unit pipe thermistor temp is higher than 55 C and 41 possible activation of high pressure the compressor top temp is higher than 95 C outdoor device unit protection device is activated Heating ovelioad If I U freeze protection thermistor temp is higher than 42 Pressure 9 55 C and compressor top temp is higher than 95 C high pressure device may be activated SES 5 outdoor unit protection device is activated F Stoppage due to excessive decrease of evaporating 47 Enabling of erue r en temperature Tem lt 35 C is activated 3 times in one P P hour motor locked in heating operation IPA Clogging of heat exchanger Locked compressor i Aclivation or overcurrent protection Excessive refrigerant charge Failure of Inverter PCB 51 Abnormality in inverter current sensor Failure of Control PCB or Inverter PCB ends Inverter PCB Abnormality Inverter AONO fOr prETeeH OCIO Compressor failure heat exchanger clogged Abnormal inverter fin thermistor Heat exchanger clogged 54 Increase in inverter fin temperature Abnormal Rasc Unit fan Failure of Fan Motor 55 Inverter Abnormality Failure of Inverter PCB 59 Inverter Abniormal inverter Tin thermistor Loose connector short circuit in disconnected cable for the temperature of inverter fi
169. hours to warm the compressor oil by the oil heater Check to ensure the operating temperature Cooling operation Indoor DB21 5 C and above Indoor WB16 C and above Outdoor DBO C and above Heating operation Indoor DB27 C and below The compressor is NOT available within 4 hours after turning ON the power supply Stoppage code d1 22 If the compressor should be within 4 hours turn ON the power and wait for more than 30 seconds Press PSW1 and PSW3 on the outdoor PCB simultaneously for more than 3 seconds The forced thermo OFF function d1 22 is canceled and the compressor operation is available 113 SMGBO0043 rev 1 04 2010 HITACHI Inspire the Next Test run Service Manual 6 2 Test run procedure using the remote control switch Turn ON the power source of the indoor units and the outdoor units Set the TEST RUN mode by means of the remote control switch Press the MODE switch and the OK switch simultaneously for more than three seconds a If the TEST RUN indication and the counting number of the connected units to the remote control switch for example Z1 5 are displayed on the remote control switch the connection of remote control cable is correct Go to O b If no indication or 72 appears or if the number of the units that is displayed is smaller than the actual number of the units there is some abnormal operation Go to Operation LED
170. ical equipameni niri RIDERE HEOEREER EE ERIT ERREERAR AREE FOND EMPER ERRARE danac iaiia ii 206 9 SMGBO0043 rev 1 04 2010 Contents HITACHI Inspire the Next Service Manual 8 2 RASG TOHRNE irent rte ne ERE E rear nra nde eR RR ee Re nne ad be RA 208 82 1 Ca pinetand FaN en e a E a eE Aaa S Eriin 208 8 2 2 REMGerant Cycle iid dicii p be Dol a a E cesa baee a EE EE EES 210 8 2 3 Blectrcal equipment iiiorenIe Dite e Imo emm ier pr 212 CENE TN PR T 215 9 1 RASC 3 5 HVRNE i trennen egere e nto nee eee nn nnn e e EXER Ee Rr ke nee Ede RA 217 9 1 1 REMOVING piping ServiCe COVER iicet additato iiianoe Rea DR setewast inais 217 9 1 2 REMOVING fan service cOVer iiie Een dote rdi See Viene aaa a du eds DR uue le Le SCR RR ETE E EIS QUT aani 217 9 1 3 Removing electrical box service Cover nemen enne rne errem enne 217 9 1 4 Removing the outdoor unit fan motor emen enne enne 218 9 1 5 Removing the compressor ssssssee eene eem n enne en nere n nnne nennen nre enne en nennen nnns 220 9 1 6 Removing the high pressure switch PSH and pressure switch for control PSC 222 9 1 7 Removing reversing valve coil sssseee ene emen enne en nne enne 222 9 1 8 Removing expansion valve coil enne ennemi nnne eere 223 9 1 9 Removing expansion valve esssseeeeenenen nene nennen enne en neret en rrr en nne n nnne ener 223 9 1 10 REM
171. ice Manual Inspire the Next Alarm code Description Ard Abnormality of protective circuit for protection l bt outdoor unit The RUN LED flickers and ALARM is displayed on the remote control switch The unit number the alarm code and the unit code are alternately displayed on the set temperature section The unit number and the alarm code are displayed on the display of the outdoor unit PCB This alarm code is indicated when AC 220V or 240V is supplied to voltage PCN9 1 and 3 on PCB1 in the outdoor unit during CMC is opened Is 220VAC or 240VAC No LX applied PCN9 1 and 3 during Faulty PCB1 stoppage G3 b A Yes PCB1 is normal N14 CN15 PCN10 PCN13 PCN8 Check wiring SEG _ faa f e O gt connection rr CIE qb mme Bays except PCB1 an bt 14 ETT 2 Z Gg pswe ee Ysec mpa poi 2 y2oa Hi 2 7888 PSW2 n B 2 vs EErEE E 6 9 6 9 m eswi GOC Lun oxo von alle Beono ogogg KL 5 i eo UM tans Bander 8 Sorry 99g Ypes m R101 Lud N 1i3iss D R103 Phenomenon Cause Check item acion Turn OFF main switch Faulty PCB1 Check PCB1 by seft checking Replace PCB1 163 SMGB0043 rev 1 04 2010 HITACHI Inspire the Next Troubleshooting
172. ice Manual Inspire the Next 4 5 7 Preheating control of compressor Operation rl Temp on the gt 55 C top of comp s 55 C CH ON on the comp 2 60 C A CH OFF 4 5 8 Prevention control for high pressure increase This function is performed to prevent the abnormal condition Alarm 02 when the outdoor air flow is decreased by a seasonal wind against air outlet When the CMC is ON during cooling operation PSC is ON and Te is 2 than Te1 4 C forced thermo off operation will be performed Te Outdoor liquid pipe temperature Te1 i o liquid pipe temperature when PSC is ON PSC ON 3 60 MPa However if it occurs more than 6 times during operation forced thermo off operation will not be performed Cause of stoppage will be 13 d1 13 81 SMGB0043 rev 1 04 2010 Available Optional Functions H ITACHI Service Manual Inspire the Next 5 Available Optional Functions 5 Available optional functions sss nennen nennen nnne 83 5 1 JRASC 3 10 A VIRNE UNIS citta rt eee nee nnn a enr a ge e P e E TEA 84 5 1 1 AVailable Ors p ge 84 RECEDIT wn e 86 5 1 3 Description of optional input signals sese eene nnne nnn nennt 88 5 1 4 Description of optional output signals ssssssssssssssessssesenenen ener enne nnne t nnne
173. imit 00 10 Standard 00 1 10 C HR RH Fd Heating temperature range limit 00 10 Standard 00 1 10 C Heat 00 5 C 9 FE eating automatic operation 01 10 C temp 02 15 C 5 2 2 Optional functions of the remote control switch Removal of heating temperature calibration A This function is used when the temperature settings of the remote control switch and the suction air temperature of the indoor unit are required to be equal In standard heating operation the suction air temperature is higher than the room temperature therefore the suction air temperature is calibrated at 4 C Indicated setting temperature suction air temperature 4 C return to 0 C This is useful when the thermistor at the suction side of an Indoor Unit is removed and installed into another place Circulator function at heating thermo OFF 7 If fan speed LOW is selected at heating thermo OFF the air of the room might become stratified because warm air stagnates near the ceiling In this case it is recommended that the circulator function explained below be used Circulator function The function keeps the fan speed at thermo OFF at the same level as thermo ON In this case air movement in the room 99 SMGBO0043 rev 1 04 2010 Available optional H ITACHI functions Inspire the Next Service Manual will be kept on the same level as thermo ON ensuring a homogenous air distribution In the case that an auto louver is equipped th
174. in the ceiling type indoor unit Phenomenon The operation sound at the HIGH speed was abnormally high Cause Countermeasure The indoor units were installed without the ducts Since there scarcely was any external static pressure an abnormally big air volume was supplied This resulted in a higher air speed through the heat exchanger Damper Indoor unit N a A Filter z Af Y In order to reduce the airflow rate a plate that is used as a damper at the discharge gas side was added Remarks Note that the running current is increased when no external pressure is given to the indoor unit This results in an overheating 257 SMGBO0043 rev 1 04 2010 11 Field work H ITACH l instruction Inspire the Next Service Manual 11 5 Alarm code 31 Question and answer for the field work Example 4 Alarm code 31 Phenomenon Alarm code 31 sometimes occurred and the system stopped Cause The combination of the indoor units and the outdoor unit was the following ON Power source Y on e OFF oN Lm ION This system was used in a tenant building One of tenant s customers turned off the main switch for the indoor unit while other indoor units ar
175. ing of compressor Basic Flange Connecting Work Insufficient cooling or heating 4 compressor failure Air Tight Test Holding of Vacuum Comes from page 2 5 2 2 3 Suspension of refrigerant piping Suspend the refrigerant piping at certain points and prevent the refrigerant piping from touching weak parts of the building such as walls ceiling etc If touched abnormal noises may occur due to the vibration of the piping Pay special attention in case of short piping length 1 15m I i B Pee Fire proof section i treatment Indoor unit In order to fix the piping to wall or ceilings use suspension and clamping systems as shown in the following figure 31 SMGBO0043 rev 1 04 2010 HITACHI Inspire the Next 2 2 4 Brazing work Piping installation Service Manual The most important work in the refrigerant piping installation work is the brazing of the pipes If it accidentally occurs a leakage due to a careless brazing process it will cause clogged capillary pipes or serious compressor failure It is important to control the clearance of the pipe fitting portion as shown below In the case that a cooper tube expansion jig is used following dimensions should be secured In order to guarantee a proper brazing neck between different pipes surfaces accurate pipe dimensions after the expansion process see the following table
176. ion of the protection device for the indoor fan motor RCI RCIM The RUN LED flickers and ALARM is displayed on the remote control switch The unit number the alarm code and the unit code are alternately displayed on the set temperature section and the alarm code is indicated on the display of the Outdoor unit PCB This alarm code is indicated when the following condition occurs thre times in 30 minutes Indoor fan rotates less than 70 rpm for 5 seconds during operation When the cause is checked using this flow chart confirm that fan speed setting is Hi Check the connectors PCB1 CN1 CN19 PCN1 PCN7 PCB2 CN201 CN202 PCN201 PCN202 PCN203 N Faston Does the indoor fan run Insuffcient voltage for PCB2 DC 280V Faulty PCB2 9 Replace PCB2 Is LED1 on PCB2 OFF Is the voltage between Vcc 15 and GND1 of PCB2 15V 10 Faulty PCB2 Replace PCB2 Is DC power supply for PCB2 correctly Is LED4 on Insufficient voltage for PCB 1 Yes Faulty PCB1 or Replace PCB1 or PCB1 OFF transformer i transformer No Is the voltage between Vcc05 and Is DC power s
177. ipes secure the part for brazing in accordance with both national and local regulations Use security glasses and gloves for cutting or welding works e Piping Connection When connecting liquid piping for units with piping longer than 15 meters apply a piping size of 9 53 mm 3 8 inches Fix the connecting pipe as shown in the following figure using the insulation attached to the Indoor Unit Fix this part with Use the flare nut of the indoor unit Insulate this part with the attached insulation the attached cord band or with tape Field supplied refrigerant piping IIIA LLL Wi i A i OILI Insulation attached to indoor unit Make flares after attaching flare nut to the connecting pipe in the multi kit package Brazing Field supplied insulation 7 NOTE A system with no moisture or oil contamination will give maximum performance and lifecycle compared to a poorly prepared system Take particular care to ensure that all copper piping is clean and dry internally To ensure this blow oxygen free nitrogen through the pipes When inserting a pipe through any hole protect the end with a cap Do not put pipes on the ground directly without a cap or vinyl tape at the end of the pipe 29 Correct Incorrect cui rr SMGBO0043 rev 1 04 2010 Piping installa
178. is operation will be also held on when the heating is turned thermo OFF O NOTE Perceptions of coolness heat and air flow are subject to personal preferences and behaviours Itis therefore recommended to discuss this with customers thoroughly and then set the unit accordingly Enforced 3 minutes minimum operation time of compressor 4 When a compressor frequently starts and stops in short intervals this function should be used to guard the compressor By setting this function the mode of a minimum 3 minutes operation will be added The mode of a minimum 3 minutes stoppage is standard In case of SET FREE this function is standard even when setting is not available 7 NOTE When the safety device is activated or the ON OFF switch is pressed the compressor is stopped immediately Change of filter cleaning time The period for filter sign indication is set for each indoor unit model when shipping The filter sign is indicated according to the filter cleaning time factory setting However this filter cleaning time can be changed depending on the condition of the filter as shown in the next table Period for filter sign indication Approx 100 hours Approx 1200 hours Approx 2500 hours No indication oaa pt aaway cassette Changed period Changed period Factory setting Changed period Liquid crystal display on Ad vu 3 du Hi bor mum remote control switch RE ze e
179. is signal allows to pre fix the operation mode in this case the heating mode F Fixing the heating independently of what the indoor unit requests If the indoor units request the oposite CN1 and CN2 mode mode than the outdoor unit the compressor will not start This is very useful to set up a unique operation mode This signal allows to pre fix the operation mode in this case the cooling mode 3 Fixing the cooling independentlyof what the indoor unit requests If the indoor units request the oposite CN1 and CN2 mode mode than the outdoor unit the compressor will not start This is very useful for computer rooms where the cooling mode is fixed throughout the year Demand th rmo This signal allows to stop the compressor if it reaches a certain power as well as to 3 OFF put the indoor unit in Thermo OFF This is very useful for installations with high power CN1 and CN2 consumption This signal allows to control the stoppage of the compressor and the fans of the indoor H Forced stoppage as well as outdoor units This is very useful when used with the alarm signals of the fire CN1 and CN2 prevention systems Current ontrol This signal allows to regulate current consumption and establish an average 5 o consumption of 5096 of the rate point This is very useful for installations that run CN1 and CN2 demand 50 24 hours a day G rr nteantiel This signal allows to regulate current consumption and establish an average E demand 75 consumption of 75 of
180. istor i i Indoor unir air inlet N s thermistor THM1 Yes X Incase of 4 way NI cassette Faulty PCB Action Phenomenon Cause Check item Turn OFF the main switch Fault Check the resistance Replace the thermistor if faulty Faulty air inlet thermistor Incorrect connection Check the connection Repair the wiring and the connections Faulty PCB Replace PCB and check the operation Replace PCB if faulty 82 g NOTE Thermistor resistance KO 40 0 15 10 5 0 5 10 15 20 25 30 35 40 45 50 55 60 Air temperature C This data is applicable to the following thermistors f Indoor unit discharge air temperature 2 Indoor unit liquid refrigerant temperature 3 Indoor unit air inlet temperature 4 Outdoor temperature Outdoor unit inlet air temperature 5 Outdoor unit evaporating temperature 6 Indoor unit gas piping Thermistor characteristics 151 SMGBO0043 rev 1 04 2010 HITACHI Inspire the Next Troubleshooting Service Manual Alarm code Description 1 Abnormal operation of the thermistor for the indoor discharge air UL temperature air outlet thermistor is removed The RUN LED flickers and ALARM is displayed on the remote control switch The unit number the alarm code and the unit code are alternately displayed on the set temperature section Th
181. itch SW3 factory supplied RUN FILTER Remove two screws and open the case PC ALHZ Hole for Switch COOL cable Switch HEAT amy Mau 1234 DIP switch SW3 2O 110 Remove the base Remove two screws and open the case SMGBO0043 rev 1 04 2010 PC ALHD Switch COOL Switch HEAT lewercency RUN DEF FILTER TIMER PC ALHC Switch COOL Switch HEAT Posh 34 DIP switch SW3 factory supplied Remove two screws and open the case ii ij 1 Remove the base 2 Remove two Screws and open the case 123 DIP switch ERGENCY SW3 S any coo HEAT lel DEF TIMER O O O 0 RUN FILTER ee Test Run Service Manual H ITACHI Inspire the Next 6 Test Run SENI 00 PTT TUE 111 6 1 Checking procedure before the test run ene emeeenemnenn 112 6 2 Test run procedure using the remote control switch 114 6 3 Test run procedure using the wireless remote control switch sssssssssssssssss 115 6 4 Test run procedure from the outdoor unit side 117 6 5 Normal operation pressure ssssssssssssseseeeeeeee ne eterne nnne rere tnr n nnne nennen nnns 118 roue Sd RE 120 111 SMGBO0043 rev 1 04 2010 Test run HITACHI Inspire the Next O OOOO Service Manual
182. its see flow static pressure chart 21 SMGBO0043 rev 1 04 2010 Units installation HITACHI Inspire the Next Service Manual 1 1 RASC 3 10 H V RNE 1 1 1 Transportation A CAUTION Malfunction Unit failure Do not put any foreign material into the unit and make sure that none exists inside the unit before the installation or test run Hanging method When hanging the unit ensure its balance and lift it up smoothly and safely Do not remove any packing materials until the unit is positioned Hang the unit under packing condition with two ropes as shown in the figure below Do not remove the plastic band or the Wire rope corrugate paper frame Pass the wire ropes through each lifting hole in the base as shown A WARNING Crush hazard Can cause seriour injury Lift the unit with 2 wire ropes and without removing its factory packaging Make sure that the unit is lifted smoothly and does not lean Do not attach lifting equipment to the plastic band or the corrugated paper frame since the ropes might slip or break the materials 7 NOTE Make sure that the exterior of the unit is adequately protected with cloth or paper Do not hold the unit with the handles or the air outlet parts Steel plates may be deformed Use gloves 22 SMGBO0043 rev 1 04 2010 HITACHI Units installation Inspir
183. ivation in Rasc Unit 03 Abnormality a meer KG Incorrect wiring Failure of PCB Tripping of fuse Power UA and Rasc Unit or indoor units supply OFF Transmission Abnormal operation between inverter 04 and Transmission failure between inverter PCBs control PCB 05 Power source Abnormality of power source wiring Incorrect Wiring Voltage drop due to excessively low Voltage drop in power supply Incorrect wiring 06 Voltage drop n m or high voltage in Rasc Unit or insufficient capacity of power supply wiring 07 Drop in discharge gas overheating Excessive refrigerant pug Expansion valve lock Cycle d Par Insufficient refrigerant charge refrigerant leakage 08 Increase in discharge gas temperature Expansion valve closed or clogged 11 Inlet air thermistor 12 Outlet air thermistor i Failure of thermistor sensor connection 13 Sensor in Anti freeze thermistor 14 indoor unit Gas pipe thermistor 19 Protection device for fan motor is Fallure af tan motor triggered 20 Compressor thermistor 22 Sensor of Rasc Unit Outside air thermistor Failure of thermistor sensor connection 24 Evaporation thermistor 31 Incorrect setting nr Unit and indoor Incorrect setting of capacity code 35 System Incorrect setting of indoor unit number Duplication of indoor unit number 38 RASC Unit circuit protection abnormality Failure of indoor unit PCB incorrect wiring connection to indoor unit PCB 135 HITACHI Inspire the Next Troubles
184. k sssssseseeneene eene nennen 30 2 2 3 Suspension of refrigerant piping sessesseeeeene emen enne nnrnen nennen nennt 31 PE NEEICriUopdqeE 32 2 2 5 Caution of the pressure by check joint enemies 33 2 2 0 Refrigerant charge quantity iiic airia ieia riaria raa 34 2 2 f Purnpdown refrigerant irre rettet ret rtt rr E PERRRU ERREUR HERE RE SER ERSEREPIR EPA RE M EFE RENE EREDRA RAE teed 35 2 3 Suspension of refrigerant piping sss mener nnnm 36 2 4 PIPING CONMEGCUON 22 200 escccncecesved ccccedaededecensacecedessadedecersugatadecsgibdadevesed i ai iiaia i iia eieaa E 37 7A 34 Tightening Tordue oer Eee e Fee rein rn Dm a e aa O r E 37 2 4 2 Flange piping connection only for RASC 10HRNE seesseeeeeeeeneen menn nene 39 2 5 Piping and refrigerant charge ere tnr enn ene RC ee RR Ren ERE ERE e RR r RR RR R de 40 EXERCI ICJsetrg 40 2 5 2 Refrigerant piping range ssssssssssssssssessssseseeeneen EEEE EEESE EENES EE SENEE ESEESE EAEAN enisi in nnn nnne sinn 41 2 5 3 Refrigerant piping length ici rene titre te sce qute nei eden ex te aa lies ken kn deb ces 42 2 5 4 Refrigerant piping SElECtION 00 2 2 cece ce ceeeeceee eee ee cee ee eee eeceae cess eee eaaeaeeeesecaaaeeeeeesecaeeeeeeseeaeaeeeeeeseeaeeeeeeeees 44 2 6 Twin and quad sys
185. l functions of the remote control switch ssssssssssssssssssseeeeeeenenn enne enne 99 5 3 Available optional functions through the remote control switch PC ARH ssssss 108 5 31 Alanmiindication oc aed eae elec ened eased ee lee een ay 109 5 4 Available optional functions through wireless remote control switch PC LH3A receiver 110 0 Test TU cese oer e RUE Rx e lenin Fo Gu eR UR EVA RUNE XR EROR Eug vi VR ER ER PURA 111 6 1 Checking procedure before the test run nemen 112 6 2 Test run procedure using the remote control switch 114 6 3 Test run procedure using the wireless remote control switch ssssssssssssssss 115 6 4 Test run procedure from the outdoor unit side ssssssssssssssesseeeeeeeens 117 6 5 Normal operation pressure sssssssssssssessseeee emere nennen enne aa EA arat 118 Mee jc ETE 120 NEK RICO peer ees 123 TA Anitial troubleshooting rire e hae A 124 7 1 1 Checking using the 7 segment display essen ener ennt 124 7 1 2 Failure of the power supply to the indoor unit and the remote control switch sussss 125 7 1 8 Abnormal transmission between the remote control switch and the indoor unit 126 7 1 4 Abnormal operation of the devices sssssssssssssssssseeeen nnne ene nenne nnns nsns nn ns 127 7 2 Troubleshooting pr
186. l switch with timer Remote control switch with timer Central control Programmable timer Wireless remote control switch Optional remote controller Receiver kit for RCI FSN2E on the panel Receiver kit for RCD FSN2 on the panel Receiver kit for RCI RCD RPC RPI RPK RPF I FSN2E on the wall Receiver kit for RCIM FSN2E on the panel 14 SMGB0043 rev 1 04 2010 Code 70510000 7E899954 60291479 60291482 60291056 60291486 60291464 60291467 60291473 60291476 Contents Service Manual Image not available Contents Service Manual Accessory PSC 5HR PCC 1A PRC 10E1 PRC 15E1 PRC 20E1 PRC 30E1 THM R2AE HARC BXE A HARC BXE B HARC MOD BUS HC A64BNP CSNET WEB V3 TS001 WEB SCREEN PCA 1IO 15 Name H LINK relay Optional function connector 2 pin extension cord 2 pin extension cord 2 pin extension cord 2 pin extension cord Remote sensor THM4 Lonwork BMS Interface 7 inputs up to 6 units Lonwork BMS Interface 4 inputs up to 32 units Integration with installations with intelligent control Building Management System Gateway Interface to LON WORKS BMS systems Integration with installations with intelligent control Building Management System Gateway Interface to BAC NET BMS systems Control System 15 inch touch screen display Integration of teams into H Link SMGB0043 rev 1
187. lary Unit 29 Flange Assy 30 Capillary 31 Condenser Assembly 32 Check Valve 33 Oil Separator 34 L Tank Assembly 35 Compressor E656DHD 65D2 36 MG SW 37 Resistor 38 Resistor 39 Resister 209 SMGBO0043 rev 1 04 2010 HITACHI Inspire the Next HITACHI naga Inspire the Next OSSO Service Manual 8 2 2 Refrigerant Cycle View from S 54 55 Drawing N EPN200809 210 SMGB0043 rev 1 04 2010 Spare parts Service Manual No Description Remarks 40 SVB Assy 40 1 Body 20 Solenoid Valve 40 2 Harness SVA2 SVA2 Solenoid Valve Coil 41 SVF Assy 41 1 Body Solenoid Valve 41 2 Harness SVF SVF Solenoid Valve Coil 42 4 Way Valve Reversing Valve 43 Harness RVR RVR Reversing Valve Coil 44 Reactor DCL 45 Transformer TF 46 Circuit Breaker 47 End Clamp 48 PV041 Assy For Inverter 49 Printed Circuit Board Main PO052 Assy 50 RPP Relay 51 Inverter Fin For Inverter 52 SSR 53 Heat Sink 54 Drain Pan Assembly Assembly 55 B Base Assy Assembly 56 Back Cover Assy Assembly 57 E Box Cover Assy Assembly 58 Front Cover Assy Assembly 59 L Back Corner Assy Assembly 60 L Corner Assy Assembly 61 L Cover Assy Assembly 62 Inlet Air Frame Assy Assembly 63 Outlet Air Frame Assy Assembly 64 R C
188. m Service Manual 4 5 5 Outdoor Unit fan control during cooling operation Operation 10 sec 100 air flow volume 1 Fan step at start Pressure switch for control ON Is fan operated more than 3 min Pipe surface temp of HITACHI Inspire the Next g NOTE This sequence is for the standard operation 1 Fan step at start outdoor unit heat exchanger 40 C Pipe surface temp of outdoor unit heat exchanger gt 50 C Yes Step up 79 Pressure switch for control ON One step up Is it continuous for more than 3 min 3 10HP gt 3 min SMGBO0043 rev 1 04 2010 Is it continuous for more than 1 min Outdoor temp Tao Air flow ratio Tao lt 2 C 15 2 C lt Tao lt 12 C 25 12 C lt Tao lt 22 C 40 22 C lt Tao lt 27 C 60 27 C lt Tao lt 32 C 80 32 C lt Tao lt 37 C 100 37 C lt Tao 110 y Two steps up Fan steps MOF 2 1 ON regulation HITACHI Inspire the Next 4 5 6 Outdoor unit fan control during heating operation Operation Y 10 sec 100 air flow vol ume Air flow ratio 30 area 1 1 Inlet air temp of indoor unit C Air flow ratio 10096 Air flow ratio
189. me of compressor described in item 3 is the standard function This function is used to cancel the enforced 3 minutes minimum operation time of compressor function Remote control switch thermistor 2 This function is used to control the unit by the built in thermistor of the remote control switch remote control thermistor instead of the thermistor for suction air Set it at I P or TZ when you use it p T However even when this function is set at i or i if the temperature detected is abnormal due to the failure of the remote control thermistor etc the indoor unit suction air thermistor is used automatically 101 SMGBO0043 rev 1 04 2010 Available optional H ITACHI functions Inspire the Next Service Manual rg D Not prepared Not prepared 3 Selection of forced stoppage logic 04 This function is used to select the logic of the contact for forced stoppage signal input The setting condition and the logic of the contact are as shown below Setting condition Logic of Activation contact l Sequence contact Open Close 00 Contact A uie Normal Enforced stoppage 01 Contact B Ennead Normal stoppage Not prepared 7 zi Not prepared Change of Louver Swing Angle iF This function is used to change the Louver swing angle Setting Louver Swing Angle Purpose ec Air Di
190. minals indicated with LOAD are connected to the inverter side and terminals indicated with LINE to the power supply side RASC 3 5 HVRNE 1 230V 50Hz Items Specifications Model ALFB 14930 3M Rated current AC 230V 30A Permissible temperature range 25 C to 85 C General dimensions 188 5 1 0 E 170 0 5 Line Load Earth wiring e o e 5 0MAX Circuit diagram Line Load 10 249 SMGBO0043 rev 1 04 2010 HITACHI Inspire the Next RASC 10HRNE 3N 400V 50Hz Main parts Service Manual 45 MAX Items Specifications Model 15 KPT2 Rated current AC 250V 15A Permissible temperature range 25 C to 85 C General dimensions A 94 2 4X 15PKT2 24O0VAC 15A e L E O s A D 25 MAX Circuit diagram Line 250 SMGB0043 rev 1 04 2010 Main parts Service Manual RASC 10HRNE 3N 400V 50Hz HITACHI Inspire the Next Items Specifications Model ALFB 16830 2FB Rated current AC 415V 27A Permissible temperature range 20 C to 85 C General dimensions A amp lt gt a nl Ok OUT pic lel Ae mr m L2 amp g 15m j MEELI ae E e mg m a Circuit diagram 251 SMGB0043 rev 1 04 2010 10 HITACHI Inspire the Next 10 6 Capacitor CB1 CB2 Main pa
191. mote control switch NOTE Ifthe wired remote control switch is used or if multiple units SET FREE DC INVERTER and utopia series are operating simultaneously you cannot perform the test run by means of the remote control switch If that is the case perform the test run by means of the wired remote control switch 1 Perform the test run after completing the installation a Set the batteries for the remote control switch b Turn ON the power source of the indoor units and the outdoor units c The yellow LED on the receiver of the indoor unit flickers 0 25 seconds ON 0 25 seconds OFF Then the yellow LED turns OFF While the LED is flickering the unit will not operate because the unit is initializing HITACHI 2 Setthe TEST RUN mode by pressing the SET switch and the OFF TIME switch simultaneously for more than three seconds The LCD should look like the LCD Mone CRUNST ran on the right figure The TEST RUN mode is not operating 3 Setthe operation mode by pressing the MODE switch The TEST RUN mode is operating 4 Operate the test run by pointing the transmitter 6 towards the receiver of the indoor unit Then press the RUN STOP switch When the indoor unit receives the We commands the yellow LED of the receiver will turn on briefly Make sure that the commands are received well and the selected mode 3 is set correctly
192. move the reactor by removing the four 4 Screws Disconnect the wiring connected to the magnet contactor and remove the magnet contactor by unscrewing the two 2 screws Disconnect the wiring connected to the SSR and remove the SSR by unscrewing the two 2 screws Disconnect the fasten connection to the capacitor and remove the capacitor by unscrewing the two 2 screws Disconnect the wiring connected to the noise filter Remove the noise filter by holding the expanded part of the holders 6 pieces with long nose pliers 7 NOTE Disconnect all the wires connected with the smoothing capacitor CB CB1 CB2 CA The wire has polar characters Identify the wire mark band and the indication on the smoothing capacitor when wire connecting Identify the terminal numbers with mark band When reassembling the terminals have to be connected to the correct numbers If incorrectly connected malfunctions or damages will occur 227 SMGB0043 rev 1 04 2010 HITACHI Inspire the Next Number Identification Reactor Magnet contactor SSR Capacitor o000 9 Noise filter HITACHI d Inspire the Next Service Manual 9 2 RASC 10HRNE 9 2 1 Removing piping service cover Remove the main parts according to the following procedures 7 NOTE Toreassemble perform the procedures in reverse To pre
193. mperature at the top of compressor gt 1070C gt indicate P5 Li rn Frost formation protection TL lt 2 C Over 3 minutes gt Frequency decrease TL liquid piping temperature of indoor unit d ma Unbalance power source detecting Inverter output current gt 13A 380A gt frequency decrease ui gt i Current demand control Inverter output current gt 2 A gt frequency decrease In case of demand control setting C n Low pressure decrease protection Low pressure switch for control is activated gt frequency decrease ui TA Y Cold draft protection TO s 10 C and e 2 2 6 gt frequency decrease Pd 0 1 Ps 0 1 TO outlet temperature of indoor unit ui Inverter retry Automatic stoppage of transistor module activation of electronic thermal or abnormal current sensor When activating 3 times in 30 minutes 48 51 53 or 54 alarm is indicated ui T ra Inverter retry Insufficient excessive voltage at inverter Circuit or PCB connector part When activating 3 times in 30 minutes 06 or 55 alarm is indicated O NOTE control During protection control except during alarm stoppage the protection control code is indicated The protection control code is indicated during protection control and turns off when canceling the protection
194. n b1 Indoor unit No setting Incorrect unit No setting Over 64 indoor units setting by refrigerant cycle No or indoor unit address EE Compressor Compressor protection alarm Compressor failure 136 Troubleshooting HITACHI Service Manual Inspire the Next 7 2 2 Troubleshooting by alarm code Alarm code Description i H Activation of the safety device in the indoor unit The RUN LED flickers and ALARM is displayed on the remote control switch The unit number the alarm code and the unit code are alternately displayed on the set temperature section The unit number and the alarm code are displayed on the display of the RASC unit PCB This alarm code is displayed when the contact between 1 and 2 of CN14 is not closed over 120 seconds during the cooling process the heating process or the fan operation RCI RCIM RCD RPC RPI RPF I No Activation of the safety Is DC24V applied to both ends of R24 device such as float Switch FS or incorrect wiring Yes THM1THM2 THM3THM4THMS5 THM6 o LED1 LED2 CN4 O O Faulty PCB CN12 ed LL 1L Ts 8 CN13 a O a fe FO Action Phenomenon Cause Check item Turn OFF the main switch Check the drain pump Remove the clogged High drain level Clogging of the drainage and drain discharge boss foreign particles T Check the continuity Fault when the drain level is dida Switch Activation of the float low T
195. n defrosting turns on It is very useful to check if the indoor unit is in thermo OFF Connect the cabling and use the materials as shown in section Avaliable ports Note that the contact of auxiliary relay X3 is closed when an operation signal is issued 5 1 5 Optional functions Programming The optional signals are programmed through the PCB of the outdoor unit Setting of the optional signals The optional signals of the outdoor unit are set up from the PCB of the outdoor unit and push switches PSW1 PSW2 and PSW3 Selecting the optional function 1 While the outdoor unit is ON set the following DIP switches on the printed circuit board of the indoor unit as follows set pin 5 of DSW2 to ON Because of these settings the function selection mode becomes available and the following indication appears on the 7 segment display A o o bt L d Fixing of demand function Available This indicates that the fixing of demand function is available 2 By pressing push switches PSW2 and PSW3 you change the input output terminal name The flowcharts shown on the next page reflects the changes on the 7 segment display when you press PSW2 and PSW3 See the flowcharts on the next page After selecting the terminal of the function setting select the availability function by pressing the PSW1 4 After setting the pin 5 of DSW2 to OFF the selected contents are memorized in the PCB of the o
196. n outlet air frame by removing the twelve 12 screws and the three 3 screws fixing the upper cover Remove the outlet air frame cover 2 Remove the fan service cover by removing the three 3 fixing screws 3 Remove the two 2 screws at one side of the fan unit feet from the side of the fan service cover 4 Remove the side cover by removing the eight 8 Screws 5 Open the fan motor electrical wiring cover by removing the four 4 screws using a screwdriver 229 SMGB0043 rev 1 04 2010 Screws Bolts HITACHI Inspire the Next Power wires HITACHI dins Inspire the Next Service Manual 6 Unscrew the power wires and clearly identify them 7 Remove the other two 2 screws at the other side of the fan unit feet Now the fan motor unit is free 8 Proceed to release the fan unit from the bottom base Electrical of the Outdoor unit Then begin to turn and pull out the box fan unit as shown in the photos A CAUTION Lifting hazard Single person operation could cause injury Fan unit weight is approx 30Kg Use two man lift Always wear gloves when performing mechanical works 9 Reassemble the parts in the reverse order of removing order 230 SMGB0043 rev 1 04 2010 Servicing Service Manual 9 2 5 Removing the compressor NOTE If the outdoor unit and upper obstacle such as the ceiling is too close less than 1 meter it is necessary to disconnect
197. n the figure below Thermistor characteristics 90 80 74 70 Thermistor 60 resistance 50 KQ 43 40 33 30 26 20 20 16 12 5 10 53 36 Js 0 15 10 5 0 5 10 15 20 25 30 35 40 45 50 55 60 Ambient temperature 9C 246 SMGB0043 rev 1 04 2010 ee HITACHI Service Manual Inspire the Next 10 3 Electronic expansion valve 10 3 1 Electronic expansion valve for outdoor unit Micro computer Pulse motor Pulse signal 2 Phase permanent magnetic pulse motor Control 0 to 500 pulse by 1 pulse Refrigerant flow control Needle Precise control Items Specifications Applicable to the models For the main cycle of RASC 3 10 H V RNE Type UKV 10 0 USRT series UKV 5 0USRT series for MVB Refrigerant R410A Working temperature range 30 C 65 C operation time of the coil less than 50 Mounting direction Drive shaft in vertical direction within an angle of 45 as maximum Flow direction Reversible Drive method 4 Phase canned motor method Rated voltage DC12V 1 8V 83PPS pulse width at ON 36mm sec OFF 60mm sec Baye condition 1 2 phase excitation Coil resistance each phase 46Q 10 at 20 C Wiring diagram drive circuit and activation mode Wiring diagram Activation 10 247 SMGBO0043 rev 1 04 2010 HITACH
198. naeeeeeeeaececeeeaaaaeaeeeeegecaeceeeeeecaeceseeseeeaeaeeeeeeeenaeeeeeeee 25 1 1 6 DUCE COMMOCKON e 26 2 PIII Wie pr ULT 27 2 1 General NOES eccna iet ee uae nae a Ee EER Ra ener ned 28 2 2 Piping work connection considerations ssssssseeene enne 28 2 21 PIPING Matera e tae dee 28 2 2 2 Three principles on refrigerant piping work sssesseseenenn eene eren nnns 30 2 2 3 Suspension of refrigerant piping sssini ninen iioi enm nennen nennen neret enne 31 2247 crie ER 32 2 2 5 Caution of the pressure by check joint nene nennen neret nennen 33 2 2 6 Refrigerant charge quantity eee enne nnrren nennen nene ennnr nre 34 2 2 7 Pump down refrigerant ice Lee ie e De reote teste be caes guste eR a TER Denuo e o co pega cia 35 2 3 Suspension of refrigerant piping sssssssssssssssseessee enne nnns 36 2 4 PIPING COnnection irren actore ERR eR ERR eaten det aaueeed RR DL UR RR RR ROEH E E RRERUE UE TRA 37 24 4 Tightening torque erento Ere pere Fe EE ee der tese late SE Fed tu tar vea sno roe rige Fue 37 2 4 2 Flange piping connection only for RASC 10HRNE seeseeeeeeeeneen nennen errem 39 2 5 Piping and refrigerant charge ssssessssseeeneneemeenen mener nennen nennen nn 40 291 CI rensettsjee 40 2 5 2 Refrigerant piping range socii eec eo uoi
199. ndicator flickers twice PIG METTE ake M 4 m it 4 1 H LLL Ayna ADDS RNKAR cman SERVICE ABNML ERUN TE SerTEMD 3 Low BERGE xa IZI Pa LIH The LCD changes as shown below AIC Perea Gig DENT CUIRE Press all the switches 13 switches UT one by one Every time you press the switch the number of the indication of the part 7 NOTE 5 A in the figure below increases one Unless all the switches are pressed the checking does not proceed to the ONN next item og Ll Z You can press the switches in any order T Pressing two or more switches simultaneously is invalid and not counted The LCD changes as shown below E 7 NOTE The remote control switch automatically starts to check the In case that the transmission circuit is abnormal the LCD remains as transmission circuit shown in the left figure and the checking does not proceed to the next item 6 189 SMGBO0043 rev 1 04 2010 HITACHI Inspire the Next The LCD changes as shown below The detected temperature of the remote control thermostat is displayed at the A part in the figure below C Uit L4 The LCD changes as shown below 1 bt LI The LCD changes as shown below Mme LL After several seconds have passed the remote control switch is automatically activated again 10 When the remote control switch is activated again the RUN
200. ng service cover Thermistor Thermistor Thermistor Rubber cap Th Thermistor t fixing plate HITACHI Inspire the Next 5 Cut the pipe at the compressor side of the brazing part 6 Remove the cut pipe by using a burner after cutting Servicing Service Manual Cut here 7 NOTE Completely clean the oil in case it has spread to other parts of the unit such as bottom base pipes and others Make sure that the pipes are cut before working with a burner Do not expose the refrigerant cycle to the atmosphere for a long period in order to avoid water and foreign particles entering into the refrigerant cycle After removing the compressor replace it quickly If it is exposed to the ambiance for a long period seal both suction and discharge pipes Remove the cap for the compressor just before replacing the compressor Before assembling the compressor seal the suction pipe and discharge pipe with tape to protect the compressor interior from foreign particles Remove the tape when connecting the pipes WJH 7 Remove the four 4 nuts fixing the compressor and remove the compressor When doing this pay special attention not to touch or deform the sorrounding pipes 8 Isolate the wires and electrical components to protect them from th
201. ng valve Compressor motor RASC 3 5 HVRNE Model code Resistance C 105 52 52 50Hz Kec 105 52 51 60Hz ken VPV MOAJ502B1 50Hz kou VPV MOAG579A1 60Hz ee STF 01AJ502D1 50Hz pp us STF 01A1511A1 60Hz ae E655DHD 65D2 380 415V 21 E655DHD 65A2 220V bri Part name Unit models Solenoid valve of gas bypass 3 8 Solenoid valve of gas bypass 1 4 Reversing valve Compressor motor RASC 10HRNE Model code Resistance 105 52 52 50Hz eros 105 52 51 60Hz brc VPV MOAJ502B1 50Hz ps VPV MOAG579A1 60Hz DC STF 01AJ502D1 50Hz pris STF 01A1511A1 60Hz peo E655DHD 65D2 380 415V boss E655DHD 65A2 220V hd 198 SMGB0043 rev 1 04 2010 Troubleshooting HITACHI Service Manual Inspire the Next e Checking procedure for the compressor CHECK LIST ON COMPRESSOR Client Model Date Is THM9 correctly connected 1 THMS8 discharge gas viewing 2 Check to ensure the 7 segment indication of Serial No Production date Checker No Check item Check method Result Remarks 1 Is wire of thermistor correctly connected by sensor CTU CTV reverse thermistor Td when comp is operating Td temperature of THM9 1 Check to ensure that thermistor on the top of PLUR Is thermistor THM9 comp is correctly mounted by viewing 2 2 Check to ensure that actually measured temp disconnecte
202. ngle Liquid 12 7 1 2 9 53 3 8 Quad QE 810N Liquid 12 7 1 2 9 53 3 8 44 SMGBO0043 rev 1 04 2010 Piping installation Service Manual HITACHI Inspire the Next 2 6 Twin and quad system installation 2 6 1 Height difference between indoor units and distributor Install all indoor units at the same height When the height difference between the indoor units due to building construction is necessary this should be less than 0 5 meters Install the branch pipe at the same height of indoor units or lower but never higher Sample Twin system Height difference between two indoors Smaller than 2 0 5m Indoor units l Branch pi pipe gS m Y Smaller than 0 5 mm 2 6 2 Installing distributor 1 Install the distributor supplied by Hitachi on request A tee can not be installed instead of a branch pipe Sample Twin system Installing the distributor Fix the branch pipe horizontally to the pillar wall or ceiling Piping must not be fixed rigidly to the wall as thermal expansion and contraction can cause pipe fracture Sample Twin system To indoor Horizontal unit Horizontal 3 m u To indoor 8 Sp unit c MC o gt WJ Horizontal To outdoor Fixing the branch Fixing the branch unit pipie to the surface pipe to ceiling or of pillar or wall beam 7 NOTE Fixthe piping from outside of insulation or inserting absorber between the pipe and a fixing metal
203. nnne nnns 89 5 1 5 Optional TUnctlOns ee istius shits aw nie De pea nece DUX a ARRAS LEEUC RARE E Rae RENE LE 89 5 1 6 Outdoor units available optional functions ssssssssssssssssseseneeeeee nennen enne nnns 94 5 2 Available optional functions through the remote control switch PC ART sssssss 95 5 2 1 Optional function settilig riori reet a eveudchoes tees Hdd eeseee recat areas 95 5 2 2 Optional functions of the remote control switch ssssssssssssssssseseseeeeeenetn enne nnne 99 5 3 Available optional functions through the remote control switch PC ARH sesser 108 5 3 1 Alami INGICAION Dtm 109 5 5 4 Available optional functions through wireless remote control switch PC LH3A receiver 110 83 SMGB0043 rev 1 04 2010 HITACHI Inspire the Next 5 1 RASC 3 10 H V RNE Units Available optional functions Service Manual The system has eight input and five output signals that are programmed in the PCB of the outdoor unit using connectors CN1 and CN2 for the input signals and CN7 for the output signal Connectors CN1 and CN2 have two and one ports respectively to configure three input options out of the eight options the system has Input connector CN1 has two ports to configure two input options out of the five options the system has The system has ten optional functions that are programmed in the PCB of the outdoor unit 5 1 1 A
204. not oil existing pipe inside may ignite Do not expose the refrigerant cycle to the atmosphere for a long period in order to avoid mixing the water and foreign particles into the refrigerant cycle After removing compressor replace it quickly If exposed for a long period seal the suction pipe and discharge pipe Remove the cap for the compressor just before replacing the compressor Before mounting the compressor seal the suction pipe and discharge pipe with a tape to protect the compressor from foreign particles Remove the tape at pipe connection 216 SMGBO0043 rev 1 04 2010 Servicing Service Manual 9 1 RASC 3 5 HVRNE HITACHI Inspire the Next 9 1 1 Removing piping service cover Remove the main parts according to the following procedures 7 NOTE Toreassemble perform the procedures in reverse To prevent contamination of the refrigerant with water or If necessary seal pipe ends using caps or tape 1 foreign particles do not expose open to atmosphere for long periods Remove the eleven 11 fixing screws 2 Slide the service cover downward and remove it 3 Pay attention while handling the cover and do not fall it off 9 1 2 Removing fan service cover 1 Remove the nine 9 fixing screws Slide the service cover downward and remove it using the handle Pay attention while handling the cover and do not fall it off 9 1 3 Rem
205. nsate gas in the refrigerant cycle Check the cycle operation temp Check the air temp and the pressure Charge the refrigerant correctly Recharge the refrigerant after the vacuum pumping Clogging of the discharge piping Check for clogging Remove the clogging Liquid line stop valve or gas line stop valve is not in operation Check the stop valves Fully open the stop valves Clogging of the check valve Check for clogging Replace the check valve 140 SMGBO0043 rev 1 04 2010 Troubleshooting Service Manual HITACHI Inspire the Next Alarm code Description i lc Abnormal operation of picking up phase signal The RUN LED flickers and ALARM is displayed on the remote control switch The unit number the alarm code and the unit code are alternately displayed on the set temperature section The unit number and the alarm code are displayed on the display of the RASC unit PCB This alarm is displayed when the main power source phase is reversely connected or one phase is not connected Single phase and 3 phases Yes Correctly connect each phase of y Is there any phase which is not connected PCB1 is normal the power source Yes Reverse phase connection Correctly connect each phase of Only 3 phases unit the power source PCB1 is normal No Faulty PCB1 or othe
206. o Connect it PCB Yes Is resistance of THM3 and THM8 between 0 24kQ and 500kQ Yes Is gas leaking Yes Repair leaks of gas No Faulty thermistor Y No Recharge refrigerant dn NN c E 2 NN N d 168 SMGB0043 rev 1 04 2010 Troubleshooting Service Manual HITACHI Inspire the Next Thermistor of indoor unit Evaporating thermistor of Action Phenomenon Cause Check item Turn OFF main switch Faulty freeze protection Fault Check resistance Replace thermistor if faulty outdoor unit Incorrect connection Check wiring to PCB Repair wiring and connections Faulty PCB Outdoor unit indoor unit Replace PCB and check operation Replace PCB if faulty Excessively low suction pressure in vacuum Liquid line stop valve is not open before operation Check stop valve Fully open stop valve Faulty or malfunction of expansion valve Check for clogging Remove clogging Check connecting wiring and connectors Replace connector Check operating sound from coil Replace coil Check discharge gas thermistor Replace thermistor Check attaching state of discharge gas thermistor Reattach thermistor Refrigerant leakage Check each temp and pressure Charge refrigerant after vacuum pumping Check gas leakage part Correctly cha
207. ocedure ssssssssssseeee ee eene emen nemen nen nennen nere nen 135 TD Ape LECCE 135 7 2 2 Troubleshooting by alarm code 00 0 eee ceeeeeeeeeeeeeeeeeeeaeeeeeaaeeeeeeeeeaeeeseaaeeesieeeenaeeesesaeeesneeeeneaneeseeaees 137 7 2 3 Troubleshooting in check mode sssssssee eene eem nennen nennen enne enne erre nnns 176 7 2 4 Troubleshooting using the 7 segment display c ccceeceeeceececeeeeeeaeeeeeeeeaaeaeeeeeeeeceeeeeeseeeaeeeeeneeaees 182 7 2 5 Cause of inverter stoppage sssssssssssssssssseseseeenenen eene ener eh EEES EEE innere istnd e nnn nn sene Eent 184 7 3 Procedure for checking each main part ssssssssesee eee 187 7 3 1 Self checking procedure of PCB using the remote control switch ssenee 187 7 3 2 Self checking procedure of the Remote Control Switch 189 7 3 3 Checking procedure of other main parts c ccccecececeeceeeeeeeeeeeeeeeeneaeeeeeesesaeaeseeeeceeeeeeeeseseaeeeeeeeeaees 191 B Spare Dalscosserone ttc di net ine ase obra Pine cree d Vane P ders EN ERU RENATA RENE ERU EE E EN E VR eR dE RUE 201 8 1 RASC 3 5 AVIRNE rci irapa nn En to p Re EY EY Ne eX ERE a Ene ER ER AR a n RATE Xa FREE GREATER HE S Aen sates Eo kae Ei 202 81 1 GCabinetand Fari cio roin Eten ee eae mer ccr n cr erii eee Datus ete eee ee 202 8 1 2 Refrigerant Cycle aine aee esu ce cose eek Ce a aeai ee Ee aces aeo Fra aeiaai 204 8 1 3 Electr
208. of HFCs The refrigerant RA10A charged in the RASC series system is an incombustible and non toxic gas However if leakage occurs and gas fills a room it may cause suffocation 258 SMGBO0043 rev 1 04 2010 Field work instruction H ITACHI Service Manual Inspire the Next The maximum permissible concentration of HFC gas R410A in air is 0 44 kg m according to EN378 1 Therefore some effective measure must be taken to lower the R410A concentration in air below 0 44 kg m in case of leakage 11 7 2 Calculation of refrigerant concentration 1 Calculate the total quantity of refrigerant R kg charged in the system by connecting all the indoor units in the rooms to be air conditioned 2 Calculate the room volume V m of each room 3 Calculate the refrigerant concentration C kg m of the room according to the following equation R R Total quantity of refrigerant charged kg C V Room volume m V C Refrigerant concentration 0 44 kg m for R410A 11 7 3 Countermeasure for refrigerant leakage The facility must have the following features in case of a refrigerant leakage occurs 1 Provide a shutterless opening which will allow fresh air to circulate into the room 2 Provide a doorless opening of 0 15 or more size to the floor area 3 There must be a ventilator fan connected to a gas leak detector with a ventilator capacity of 0 4 m min or higher per Japanese refrigeration ton compressor displac
209. olled under the lower temperature conditions than the setting temperature indicated value of the remote control Switch Setting Temperature for Room Temperature Control at Cooling Setting Condition Actual Control Temperature 00 Standard Remote Control Switch Setting Temperature Indicated Value 01 Remote Control Switch Setting Temperature Indicated Value 19C 02 Remote Control Switch Setting Temperature Indicated Value 2 C O NOTE The setting temperature lower limit after compensation is 19 C Not prepared 4 Not prepared Az Not prepared 5 Not prepared Z Not prepared 7 Z Not prepared i 3 Drain pump in heating when the humidifier is installed Z This function is used to operate the drain pump in heating operation High speed 5 This function is used to increase the fan speed due to the high ceiling Only available for RCI and RCD Units In case of RPI units this setting is used to select the static pressure High speed at heating thermo OFF 2 This function is used to increase the fan speed with function 5 when thermo OFF in heating operation The fan speed is not increased when thermo OFF in heating operation at the function X 5 setting Only available for RCD units Canceling the enforced 3 minutes minimum operation time of compressor 1 i ri In case of SET FREE the enforced 3 minutes minimim operation ti
210. om RCS 01 Available or central control eee un Fixing of operation as exclusive 00 Not available This function eliminates heating mode n 1 TENS cooling unit 01 Available from RCS or central control 00 Not available This function changes automatically from HH RAI Automatic COOL HEAT operation HH RA hi u i peration Toq Available cool to heat 00 Not available This function eliminates the possibility of RH HR bt Fixing the air volume changing fan speed from RCS or central 01 Available control br Not prepared 00 Not available Standard no compensation 3 hh S er T 01 Available Compensation in 1 C 02 Available Compensation in 2 C 00 AL Not prepared a Not used standard 00 00 hd Not prepared T Not used standard 00 00 hE Not prepared m Not used standard 00 Ld Not prepared Ce Not prepared La Not prepared 97 HITACHI Inspire the Next Available optional functions Service Manual Item Optional functions Setting Contents of parts Content 9 ru Drain pato in heat 00 Not available This function is used to activate the drain LH pump g 01 Available pump in heating mode 00 Medium static pressure m factory setting This function is used to change the Static pressure selection static pressure levels from the remote 01 High static pressu
211. omenon Cause Check item Turn OFF the main switch Failure of the thermistor Check the thermistor Replace or correctly Failure of the discharge m using the self check mode connect the wiring when air temp thermistor amp e Disconnected wire of the 2 it is abnormal thermistor Indoor fan speed does not change Failure of the remote control switch Replace if it failed Check it using the self check mode 1 Failure of PCB for the indoor unit Replace if PCB fails f Failure of thermistor Failure of thermistor for outdoor evaporating temp during heating Disconnected wire of thermistor Replace or correctly connect when it is abnormal Disconnected 4 way valve Measure the resistance Fail coil of coil oe Replace the 4 way valve 4 way valve NN Incorrect activation of Enforced power supply 4 way valve No defrost operation mode is available during Disconnected control wires Correctly connect the the heating process or between indoor unit and Check the connectors AA the defrost operation outdoor unit wimg continues Disconnected wiring to Check Hie sonneciom Correctly connect the PCB wiring Failure of the outdoor its of PCB lida Check PCB using the self Replace PCB when Failure of PCB z the check mode is not check mode 1 available Disconnected wiring to Check te connectors Correctly connect the PCB wiring Failure of the indoor unit of PCB T
212. ompressor is maintained at 15 18Hz after the compressor is started one of the absolute values of the running current at each phase U U V and V is less than 1 5A including 1 5A Restart the operation How is the compressor operation when you restart the compressor Power wiring of the comp is not p through CT Pass the wires through CT Compressor stops immediately Faulty PCB2 nearly 18Hz Replace PCB2 2 Compressor does not No operate P7 is displayed 1 Check ISPM dipIPM IPM Is the coil resistance No of the comp normal Replace the compressor Yes T Is output of ISPM IPM or dipIPM correct Or is the voltage between U V V W and W U Replace PCB2 if faulty 1 P7 is shown at 7 segment on the Outdoor unit PCB 2 Perform the high voltage discharge work by referring to the item 7 3 4 before checking and replacing the inverter parts 171 SMGBO0043 rev 1 04 2010 HITACHI Inspire the Next Troubleshooting Service Manual Alarm code Description Z ot Protection activation of IPM or DiplPM and PCB2 RASC 3 5 HVRNE and RASC 10HRNE Conditions Short circuited or grounded or or Control voltage decrease The RUN LED flickers and ALARM is displayed on the remote control switch The unit number the alarm code and the unit code are alternatel
213. on can not be activated 5 Indoor temperature setting for energy saving This function can be activated when the customer wants to reduce the system power consumption The setting temperature will be increased or decreased depends if it is in cooling or heating mode Setting defrosting at low speed Using this option you can select the speed of the indoor unit fan during the defrost period Fan speed during defrosting Discharge air Standard temperature C situation 30 Indoor unit fan stoppage during 25 defrosting Setting Q airflow Optional situation T Speed of the Low indoor unit fan at Q slow mode during Slow the defrosting Stoppage E 28 2 e VE p 3 3 P E i E o OE o o o I Os a I Low noise setting This function can be activated and then the compressor frequency is set lower than the normal setting This function can activate in cooling or heating mode 91 SMGBO0043 rev 1 04 2010 HITACHI Inspire the Next e Night shift low noise Available optional functions Service Manual When you set the operation mode to night mode low noise which is used especially during the nighttime the cooling capacity is decreased to 60 You should use the night shift operation only when the remaining cooling capacity can supply the requested temperature e Outdoor fan Maximum rotation rotating speed 50 100
214. onnecting wires and pipe insulation from 2 Collect the refrigerant from the check joint according to the brazing flame the section Removing compressor in this chapter Remove the flare nuts with two spanners to avoid 3 Remove the solenoid valve coil according to the twisting section Removing coils for reversing valve and solenoid valve in this chapter Reassemble the parts in the reverse order of removing order of removing procedures 4 Remove the brazing and flare nuts Using a blowtorch and previously cooling the pipe side with wet cloth in order to avoid brazing material entering the reversing valve 235 SMGB0043 rev 1 04 2010 HITACHI dias Inspire the Next OOOO Service Manual 9 2 12 Removing the PCB A DANGER ray ge Electrical hazard Risk of death Check that the LED201 red located on the DIP IPM is OFF Do not touch the electrical components when LED201 Red is ON in order to avoid an electrical shock Do not touch the electrical components of the PCB directly 7 NOTE When handling the PCB take care of components Do not apply excesive force to them in order to avoid damaging the motherboard and failures 1 Revome the electrical box service cover by removing the three 3 fixing screws Pull up and remove the cover using the handle Disconnect all the connectors in the PCB Remove the PCB by pressing the expanded parte of the four 4 pla
215. ontrol switch with the built in receiver part of the wall type indoor unit and you need to perform the above checking perform the following procedure 1 Turn OFF the power supply 2 Disconnect the connector CN25 on PWB M 3 Connect the PC ART 4 Turn ON the power supply After finishing the checking turn OFF the power supply again and reconnect the connectors according to the previous situation before the checking From previous page ok If there is a next unit Press Press TEMP ne B v HIGH 1234 COOL y al Hiper 3 After 1 to 5 seconds Tm HIGH ts i Result LUL lt pt ATC ATC CHECK CHECK After 1 second Repeat gt I LI gt gt al ml bt o4 LL Release PCB check mode RESET O Press o NOTE If this indication continues and the alarm code not connected to the remote control switch uA HIGHI s 12348 CooL mone T LE HE ADDS RN pt DN AIC CHECK PCB in indoor unit PCB in outdoor unit before will be deleted 4 t is not displayed this means that each one of indoor unit is Check the wiring between the remote control switch and the indoor unit In this troubleshooting procedure checking of the following parts of the PCB is not available relay circuit DIP switch option circuit fan circuit protection circuit r
216. ontrol system HITACHI Service Manual Inspire the Next 4 3 Protection and safety control Compressor and fan motor protections The following devices and their combinations protect the compressor and fan motor This switch cuts out the operation of the compressor when the discharge pressure exceeds the setting This band heater protects against the oil carry over during the cold starting as the band heater is energized while the compressor is stopped Internal thermostat that is embedded in the fan motor winding this internal thermostat cuts out the operation of the fan motor when the temperature of the fan motor winding exceeds the setting High pressure switch Oil heater Fan motor protection RASC Safety and control device setting Model RASC 3HVRNE RASC 5HVRNE RASC 10HRNE 0 05 0 05 0 05 Cut out MPa 4 15 4 15 4 15 High pressure switch for compressor 0 15 0 15 0 15 Cut i MPa 0 15 0 15 10 15 uem 3 20 3 20 3 20 0 01 0 01 0 01 Cut out MPa 2 85 2 85 2 85 Pressure switch for by pass T x x Cut in MPa 3 60 3 60 3 60 0 15 0 15 0 15 1 230V 50Hz A 40 50 Fuse 3N 400V 50Hz A 40x2 Cranckcase heater Output W 40x2 40x2 40x1 CCP timer Non adjustable Setting time min 3 3 3 Fan motor fuse A 10 10 12 MCB ifi T a Cut out C 130 130 145 merino eer Cut in C 60 110 60 110 70 MCB Magnetic Circuit Breaker
217. oor unit with Wey aes ud oe ek dane es ee a Stop of DNUS auto louver gt Op O gt Stop of inverter Je Stop of MC Temp lt 55 C gt on the top of Power to CH ON comp z 60 C gt Power to CH OFF Stop of MOF Power to Y52C OFF 9 Power to CMC OFF 1 Pressing RUN STOP Switch L 3 MD OFF After 3 Yes for unit with drain pump min 20 sec Power to YH2 OFF Power to EHW OFF for unit with EHW 20 Power to MIF OFF RUN STOP lamp OFF DRY set fan speed amp set temp indication continuously ON STOP Y Power to LU OFF L 77 Power to PCB in I U OFF Indication LCD OFF Power to O U OFF a Power to PCB in O U OFF Power to CH OFF 71 SMGBO0043 rev 1 04 2010 HITACHI Inspire the Next 4 4 3 Heating operation Control system Service Manual LU Indoor unit O U Outdoor unit Power t Power to PCB i idis s55 C SEI pod et n on the top Power to CH ON O U ON O U ON of comp I gt 60 C Power to CH OFF Only for I U with Auto louver 0 Silo bW Reset Start of transmission between EN __ OT L I U and O
218. oor units 1 Units Installation mmmmmmnmnnnnnnnnnnnennn nnn nnns 19 Ti RASCI 10OHAVRN E EE 22 JE Mransp rtatiO M si ea daa a ed adaa d e Guerin ede iaeaea ra edeneda irie 22 11 2 Center OF Gravity RP RC 23 1 1 3 Installation space Initial Ghieck cii iii tirer ep i edad eee ae aitai iaaa 23 11 4 Place proviSiODi eroi o Ree ER end b Pe pe tee rrt i a Ae as eed 24 1 1 5 Available confIguratlonis rus cuc eidem ce rapta grt eec eati ed Eae iere edidi rica ce e eu eua a eee oe edge tag auda 25 1 1 6 Duct connection 19 SMGBO0043 rev 1 04 2010 Units installation HITACHI Inspire the Next Service Manual A DANGER Electrical hazard Risk of death Before gaining access to terminals or performing any maintenance operation turn OFF all power switches and disconnect all supply circuits Check that the LED201 red located on the DIP IPM is OFF Do not touch the electrical components when LED201 Red is ON in order to avoid an electrical shock Do not touch the electrical components of the PCB directly A WARNING Damage by water Electrical hazard Install the unit indoors to prevent water contact The water proof class is IPXO Install the unit where no high level of oil mist salty air or sulphurous atmosphere exists Attach a water proof cover in order to prevent water getting into the uni
219. oor units and lod outdoor unit Outdoor unit capacity setting is not correct The RUN LED flickers and ALARM is displayed on the remote control switch The unit number the alarm code and the unit code are alternately displayed on the set temperature section The unit number and the alarm code are displayed on the display of the outdoor unit PCB This alarm code is indicated when the total indoor unit capacity is not equal to the combined outdoor unit capacity Is DSW3 on the outdoor unit PCB1 set correctly Yes Is DSW3 on the outdoor unit PCB set correctly Yes Total capacity of the indoor unit s is wrong No Set the capacity for PCB1 Set the capacity for PCB Phenomenon Cause Action Check item Turn OFF main switch T Incorrect capacity setting of indoor unit Check combination of indoor units and capacity setting on Correctly set dip switch DSW3 PCB Incorrect capacity setting of outdoor unit Check capacity setting on outdoor unit PCB Correctly set dip switch DSW3 Total indoor unit capacity connected to the outdoor unit is beyond permissible range Check outdoor unit model by calculating total indoor units capacity Ensure that total indoor unit capacity is from 80 to 120 O NOTE DSW2 is not equipped with some models 161 SMGB0043 rev 1 04 2010 Inca
220. opped after the automatic operation when the remote control switch is activated again SMGBO0043 rev 1 04 2010 Troubleshooting HITACHI Service Manual Inspire the Next 7 3 3 Checking procedure of other main parts e RASC 3 5 HVRNE Procedure for checking the DIP IPM High voltage discharge is an imperative work for replacing parts A WARNING DIP IPM A Electrical hazard Can cause serious injuries Perform the high voltage discharge procedure as described 1 Turn OFF the main switches and wait for three minutes Make sure that no high voltage exists If LED201 is ON after start up and LED201 is OFF after ein turning OFF power source the voltage will decrease soldering iron lower than DC50V b q 2 Connect connecting wires to an electrical soldering Coninecung ties iron M 3l 3 Connect the wires to terminals P and N on DIP IPM Discharging is started resulting in hot soldering iron Pay attention not to short circuit between terminal P and N
221. or from foreign particles Remove the tape when connecting the pipes Remove the four 4 nuts fixing the compressor and remove the compressor When doing this pay special attention not to touch or deform the sorrounding pipes Isolate the wires and electrical components to protect them from the burner flame when brazing the connection pipes For brazing the compressor connection pipes first cool down the compresor piping side covering it with wet clooth Then brazing material will not enter into the compressor If the brazing material enters the compressor it will cause compressor failures 10 Reassemble the parts in the reverse order of the indicated removing procedures Tighten the screws U V and W for compressor wires with 2 5N m Fix the lead wire firmly 7 NOTE Fix the lead wire for the compressor firmly using a cable tie to aviod contacting the metal sheet sharp edges and the high temperature piping A WARNING Risk of fire Smokes and other damages may occur All compressor pipes must be brazed to be connected to the refrigerant circuit Ensure that all the sourrounding is free of flammable objects and liquids when performing piping brazing work 221 SMGB0043 rev 1 04 2010 HITACHI Inspire the Next Details for compressor terminals Fix it with screw Compressor wires 3 wires HITACHI Inspire the Next 9 1 6 Removing the high pressure switch
222. order of removing procedures 223 SMGB0043 rev 1 04 2010 HITACHI Inspire the Next Electronic expansion valve coil Expansion valve Brazing part HITACHI Inspire the Next 9 1 10 Removing reversing valve 1 Remove the six 6 screws of the side cover Slide the cover downward Remove the electrical service cover by unscrewing the nine 9 fixing screws Slide the service cover downward and remove it using the handle Collect the refrigerant from the check joint according to the section Removing compressor Remove the reversing valve coil according to the section Removing reversing valve coil Remove one 1 fixing screw for the valve mounting plate Remove the stop valve at the gas side from the valve mounting plate by removing the two 2 screws Remove the reversing valve assemblies from the 4 brazed parts where it is fixed Remove the brazing of the reversing valve and the stop valve at the gas using a blowtorch Cool down the piping side covering it with wet cloth in order to avoid brazing material entering the reversing valve Protect the connecting wires and pipe insulation from the brazing frame Remove the reversing valves from its assemblies 4 brazed parts X Perform the brazing with a blowtorchto remove and reassemble the reversing valve by cooling the pipes first with wet cloth in order to avoid brazing material entering the reversing valve Reassemble the parts in th
223. ormal PCB1 broken gt Faulty CMC1 Yes Check activation of the following safety devices and the power source wiring Check item Remove the cause after checking Connector No Pin No 1 High pressure switch PCN9 1 to 3 PSH 4 15MPa 41 5 kgf cm G 2 Is the power source line reverse phase or open phase If the wiring is incorrect perform the wiring correctly again 138 SMGB0043 rev 1 04 2010 Troubleshooting Service Manual HITACHI Inspire the Next Phenomenon Cause Check item Action Turn OFF the main switch Activation of the high pressure switch due to the excessively high discharge pressure Insufficient air flow to the heat exchanger Outdoor heat exchanger during the cooling process or indoor heat exchanger during the heating process Check the heat exchanger for dust or for clogging Check the air filter for dust Remove the dust or the clogging Remove the dust Check for any obstacles at the inlet or the outlet of the heat exchanger Remove the obstacles Check the service area Secure service area Check the speed Outdoor fan cooling indoor fan heating Replace the fan motor if faulty Malfunction of the expansion valve Disconnected of the connector Fix the looseness or reconnect the connector Fully closed and locked Replace the expansion valve Excessively high temp air to the indoor unit Calculate th
224. orner Assy Assembly 65 R Cover Assy Assembly 66 Upper Cover Assy Assembly 67 RAIL 68 Spacer 69 Holder 70 Clamp 71 Fuse Holder 72 Spacer 73 Push Spacer 74 Push Spacer 75 Push Spacer 76 Band 77 Rubber Bush 78 Bush 79 Collar 211 SMGB0043 rev 1 04 2010 HITACHI Inspire the Next Spare parts Service Manual HITACHI Inspire the Next 8 2 3 Electrical equipment View from Q uy NP TEES 4 Olg y A wt via X WSs Legs 03 Exploded view from R Drawing N EPN200809 212 SMGBO0043 rev 1 04 2010 Spare parts Service Manual 213 No Description Remarks 80 Thermistor For Inverter 81 R Back Cover Assy Assembly 82 Special Nut 83 Condenser Stay 1 84 Condenser Stay 2 85 Handle 86 S Valve Protection Stay 87 Foot Assy Assembly 88 Fan Duct Connection 89 FS Stay 90 Float Switch 91 C Heater 92 Pipe SC1 Unit 93 Pipe SC2 Unit 94 G Valve Assy 95 L Valve Assy 96 4 Way Valve Assy 97 Pipe C Assy 98 Pipe D Assy 99 Pipe S Assy 100 Pipe E 101 L Pipe 3 102 Rubber Cap 103 RC Cover 104 Cover SMGBO0043 rev 1 04 2010 HITACHI Inspire the Next Servicing HITACHI Service Manual Inspire the Next Ores BD UV ICING M 215 Css 217 9 1 1 Removing piping Service COVER 2 coetui tiun irse
225. ou press the part A of the TEMP switch If you press the part 7 of the TEMP switch the previous indication is shown Indication of the category code Indication of the temperature etc Temperature indication Normal Temperature displayed 177 4 Indoor unit temp L setting C a ee LL Indoor unit air inlet 2 temp at thermistor hiz ci i C Indoor unit discharge i 3 air temp at thermistor h 4 C tS iun Indoor unit heat 4 exchanger liquid pipe h H ci i temp C en iid 5 Temperature at remote LIT Ar sensor C Lt ml bn al 6 Outdoor unit ambient LIT r1 temp C LU UL Indoor unit heat e 7 exchanger gas pipe h i d temp C 2a Outdoor unit _ 8 evaporating temp h H l i d during heating C ae yes 9 Control information h H Discharge gas temp 10 at the top of the comp lH H chamber C T Thermo temp of the Li m remote control switch LU LL mal SMGBO0043 rev 1 04 2010 Abormal or nu NT NC Li Li o a ni 3 Thermistor is open circuited or PCB is defective 2H Temp for top of comp r Thermistor is short circuited or PCB is defective
226. ough the outdoor unit heat exchanger Are there any obstacles at the inlet or the outlet of outdoor unit Remove the obstacles Is the service area for the outdoor unit sufficient Secure a sufficient service area Check the speed of the outdoor unit fan Replace the fan motor Excessively low air temp through the outdoor unit heat exchanger Check for any short circuited air to the outdoor unit Remove the cause of the short circuited air Defrosting is insufficiently Check the thermistor for the defrost operation completed Replace the thermistor for the defrost operation 132 SMGBO0043 rev 1 04 2010 Troubleshooting HITACHI Service Manual Inspire the Next Abnormal operation of the devices Cont Action Phenomenon Cause Check item Turn OFF the main switch Check the filter for a Remove the clogging clogging Insufficient air flow to Check for any obstacles the indoor unit heat at the inlet or the outlet of Remove the obstacles exchanger the indoor unit Check the indoor fan Replace the fan motor speed Excessively high air temp f Check whether or not the Remove the cause of to the indoor unit heat Excessively high short circuited air exists the short circuited air discharge pressure exchanger Excessively charged Check the refrigerant Correctly charge the refrigerant quantity 1 refrigerant Non condensate gas in Check
227. ove the clogging outdoor unit clogged No Faulty PCB2 or thermistor 1 Perform the high voltage discharge work by referring to the item 7 3 4 before checking and replacing the inverter components 173 SMGB0043 rev 1 04 2010 Replace it Troubleshooting HITACHI l Inspire the Next Service Manual Alarm code Description IPM or PCB2 abnormality The RUN LED flickers and ALARM is displayed on the remote control switch The unit number the alarm code and the unit code are alternately displayed on the set temperature section The unit number and the alarm code are displayed on the display of the outdoor unit PCB In case that the abnormality of alarm code 55 occurs four times within 30 minutes the alarm code of abnormality occurred for the fourth time is indicated Retry operation is performed up to third time of abnormality occurrence Conditions When the transmitting abnormality occurs between dipIPM or IPM and PCB2 this alarm is indicated and the operation is stopped Troubleshooting Replace the PCB2 174 SMGBO0043 rev 1 04 2010 Troubleshooting Service Manual HITACHI Inspire the Next Alarm code Description re Lr Compressor protection This alarm code is displayed when one of the following alarms occurs three times within six hours If the outdoor unit operates continuously without removing the
228. oving electrical box service cover Remove the nine 9 fixing screws Slide the service cover downward and remove it using the handle Pay attention while handling the cover and do not fall it off 217 SMGB0043 rev 1 04 2010 Piping service cover Fan service cover Drain pipe Electrical box service cover Handle HITACHI Inspire the Next 9 1 4 Removing the outdoor unit fan motor 1 Remove the electrical box service cover 2 Remove the PCB plate by removing it s screw Turn the PCB plate towards the front side 3 Disconect all the wires to the DIP IPM according to the dotted marks in the photo A DANGER Electrical hazard Risk of death Check that the LED201 red located on the DIP IPM is OFF Do not touch the electrical components when LED201 Red is ON in order to avoid an electrical shock Do not touch the electrical components of the PCB directly PCB plate DIP IPM 4 Remove the four 4 screws fixing the DIP IPM Draw the DIP IPM towards the front side and leave it in a clear and safe place to prevent any damage 5 Through the hole left by the DIP IPM remove the three 3 M5 screws located inside the unit in the middle of the fan stay 7 NOTE Pay special attention to the edges of the plates when removing these screws Always wear gloves when performing mechanical works 6 Remove float switch assembly from
229. ower supply Prevention for Cooling Discharge Air temperature decrease i This function is used to change Thermo ON OFF conditions at cooling operation and prevent discharge air temperature decrease In the result the perception of cold draft is eliminated Thermo OFF Conditions a Cooling Operation including Dry Operation and b Indoor air discharge temp lt 11 C has been kept for 3 minutes Thermo OFF when discharge air temperature is low Thermo ON Conditions a Indoor discharge air temp gt 13 C and b Thermo ON depends on indoor discharge air temperature Not Thermo ON when discharge air temperature is low Prevention for Heating Discharge Air temperature decrease d 5 This function is used to prevent discharge air temperature decrease by lowering actual fan speed than the indications on the remote control switch Indications on Remote Control Switch Actual Fan Speed HIGH MEDIUM MEDIUM LOW LOW LOW 5 Room Temperature Control for Energy Saving c5 When outdoor temperature air thermistor is detecting that the air conditioning load is low from the outdoor temperature This function is used to automatically save energy Nor prepared i For the following optional functions please refer to Econofresh or KPI proper service manual Ventilation mode KPI E All fresh operation econofresh Increasing supply air volume KPI Enthalpy sensor econofr
230. pansion valve coil A DANGER Electrical hazard Risk of death Check that the LED201 red located on the DIP IPM is OFF Do not touch the electrical components when LED201 Red is ON in order to avoid an electrical shock Do not touch the electrical components of the PCB directly 1 Remove the piping service cover by removing the eleven 11 fixing screws 2 Remove the electrical box service cover by removing the nine 9 fixing screws 3 Remove the CN5A connector on the PCB in the electrical box 4 Hold the expansion valve coil and slightly rotate then pull it up Refer to the figure below to replace the electrical valve The lock mechanism is equipped with the expansion valve coil Check to ensure that the expansion valve coil is locked 9 1 9 Removing expansion valve 1 Revome the piping service cover by removing the three 3 fixing screws Pull up and remove the cover using the handle 2 Collect the refrigerant from the check joint according to the section Removing Compressor 3 Remove the coils according to the section Removing Expansion Valve Coil 4 Remove the brazing as shown in the figure below Electronic Expansion Valve EVO 2 brazing parts Perform the brazing to remove and reassemble the electronic expansion valve by cooling with wet cloth Protect the connecting wires and pipe insulation from brazing flame 5 Reassemble the parts in the reverse
231. pansion valve is set at the specified opening 5 Normal opening of the electronic expansion valve Coling operation Heating operation e 480 pulse 100 1 Setoftarget temperature TdSH 20 25 C 2 Simulation PI control for the electronic expansion valve The electronic expansion valve opening is controlled so that the thermistor temperatures for the compressor can reach the target temperature 77 SMGB0043 rev 1 04 2010 HITACHI Inspire the Next 4 5 4 Activation of protection device control Control system Service Manual Excessively high drain water level FS OFF V Power to H2 OFF YH2 Close c MD ON Ae Alarm of I U PCB Overcurrent to MC Excessively high discharge gas temp Alarm of O U PCB High pressure Excessively high gt temp of I U fan ITI open gt motor Overcurrent gt 5A to Blown fuse Power to control circuit EFR1 EFS1 transformer OFF 8 Blown fuse EF1 EF2 4 15 MPa PSH Open H1 Y52C OFF y E r gt High temperature of CMC OFF inverter fin Excessively high current to MOF 78 SMGBO0043 rev 1 04 2010 RUN light flickers MIF stop Light and LCD are not indicated MC OFF MOF OFF Control syste
232. parts If contacted electrical parts will be damaged Y52C Y21 To start checking press PSW2 switch for more than NE three seconds Y20B FAN1 To proceed checking press the PSW2 switch 4D 4d To back to the previous item press the PSW3 switch Y20A1 YCH To cancel this checking press the PSW2 switch for 7 NB 7 N ev more than 3 seconds PSH Manual defrost V A SEG1 PSW1 PSW2 PSW3 Item Indication data Item z 7 Check No Indic Indic Contents Total capacity of indoor unit connected 01 LH Bg 00 96 Input output state of outdoor micro computer 02 z r E Indicates only for the segments corresponding to the equipment in the at n figure See figure above Alarm code for abnormal stoppage of ca nuu compressor 03 ro LUCI Alarm code on compressor Inverter order frequency 04 bt nt 30 115 Hz to compressor Ee t __ In case that frequency is higher than 100Hz the last two digits flicker Indoor order frequency Le nt 30 115 Hz to compressor 05 rue t in case that frequency is higher than 100Hz last two digits flicker F Tr mn 00 100 96 PI tow ralio m J CU AN Incase that air flow ratio is 100 00 flashes E zn 00 100 96 Qutdoorynit expansion valve opening 07 Incase that expansion valve opening is 100 00 flashes roa nu 00 142 9C Teper Mine atthe tap Ot epa pressor eR JH HE In case that temperature is higher than 100 C the last two digits
233. ping Is the voltage between PCN9 1 and 3 220V 240V Is protection device activated Faulty PCB1 Yes Yes Yes EI Is CMC ON more than 3 seconds No gt Faulty PCB1 jg Check the following value by remote control switch 1 Top of compressor temperature 95 C or less 2 Liquid refrigerant piping temperature of indoor unit 55 C or less if exceeding the above value repair it Action Phenomenon Cause Check item Turn OFF main switch Clogging of Heat exchanger Check for dust on air filter Remove it Activation of high pressure Check for any obstacle at inlet or Switch due to excessively high Insufficient air flow to heat outlet of heat exchanger discharge pressure during exchanger of indoor unit heating operation Check the service space Secure service space Check fan speed Outdoor fan cooling Replace fan motor if faulty Indoor fan heating 166 SMGBO0043 rev 1 04 2010 Troubleshooting Service Manual H ITACHI Inspire the Next 4 Action Phenomenon Cause Check item Turn OFF main switch Calculate heat load Reduce heat load or use a bigger unit Check for hot air near the ceiling Make good circulation Excessively high temp air to indoor unit heat exchanger Check for short circuited air Remove short circuited air Check for other RASC Unit Remove RASC Unit
234. ps and the other units are under the It is abnormal if the liquid pipe pressure does not increase and the outlet temperature of the expansion valve decreases after the cooling process starts It is abnormal under the following conditions after the heating process for more than 30 minutes the discharge gas temperature of the compressor is not 10 C higher than the condensing temperature and there is no other faults such as an excessive charge of refrigerant and others 196 SMGB0043 rev 1 04 2010 Troubleshooting Service Manual e Checking procedure for the electrical coil parts Abbreviations used for colors HITACHI Inspire the Next Black Brown Red Yellow Green Blue Grey Orange White BLK BRN RED YEL GRN BLU GRY ORN WHT Fan motor of the outdoor units Power s pus zs Outdoor units t Electrical wiring diagram Wiring No Resistance Q consumption o e i i j BLU 0 O BLK 8 67 796 RASO SMVRNE 399 W i BLU BRN 10 50 7 i e o e i I T BLU 0 O BLK 3 47 7 ere uN i BLU 0 6 BRN 5 99 7 i e o e i i BLKO OwHT 2 26 7 RASC 10HRNE 1500 W BLKO ORED 7 20 7 i e 197 SMGBO0043 rev 1 04 2010 HITACHI Inspire the Next Other parts Troubleshooting Service Manual Part name Unit models Solenoid valve of gas bypass 3 8 Solenoid valve of gas bypass 1 4 Reversi
235. ption the two first louver 02 High ceiling 5 steps position will be not available o 00 Not available This function retains the settings of the d ON OFF 1 unit power supply i unit if power supply is interrupted The 01 Available unit will start when power is restored rZ Not prepared 00 Not available This function retains the settings of the 9 a4 Restart function after power unit if power supply is interrupted The ES failure 01 Available unit will restart when power is restored if the unit was ON before the power failure Q9 nd Prevention cooling for discharge 00 Not available ili air temperature decrease 01 Available 9 m Prevention heating for discharge 00 Not available Ehe air temperature decrease 01 Available 9 AE Room temperature control for 00 Not available ES energy saving 01 Available di Not prepared 00 07 Not used standard 00 ES Not prepared Su 00 Not available e Eh indege ian operation Umer anar 01 60 minutes This function delays the indoor fan start cooling operation stopage 02 120 minutes 00 EG Not prepared 01 Not used standard 00 98 SMGBO0043 rev 1 04 2010 Available optional functions H ITACHI Service Manual Inspire the Next Item Optional functions Setting Contents of parts Content Fan operation control at heating 00 rH ru thermo OFF 0
236. r cause see below e RASC 3 5 HVRNE RASC 10HRNE Voltage for unit to Voltage for unit to be suspended be suspended 3 Running voltage 4 Running voltage 207 to 253V 342 to 456V gt gt gt Setting voltage Setting voltage Less than 187V Less than 323V z Action Phenomenon Cause Check item Turn OFF the main switch Check it according to the Replacing WITOS opes tightening screws or correct Reverse or single phase Activation of reverse phase electrical wiring wiring sensor in the RASC unit Faulty RASC unit PCB Replace PCB if faulty 141 SMGBO0043 rev 1 04 2010 HITACHI Inspire the Next Troubleshooting Service Manual Alarm code Description i H 4 Abnormal transmission between the indoor units and the outdoor unit micro computer is automatically reset outdoor unit breaker for the outdoor unit is activated Refer to the next page Note from next page Check item The RUN LED flickers and ALARM is displayed on the remote control switch The unit number the alarm code and the unit code are alternately displayed on the set temperature section The unit number and the alarm code are displayed on the display of the outdoor unit PCB This alarm is displayed when an abnormal operation is maintained for three minutes after the normal transmission between the indoor units and the outdoor unit Also an abnormal operation
237. r than 1 5A When the frequency is 15 to 18Hz after starting Cause of abnormality Failure of current sensor Failure of IPM DIP IPM ISPM Failure of compressor fan motor Disconnected wiring SMGB0043 rev 1 04 2010 Main parts Service Manual HITACHI Inspire the Next Protection function RASC 3HVRNE Overcurrent protection for inverter Rated Current x 150 7 ay Rated Current x 105 2 L h 10us 50ms 30s Time RASC 5HVRNE Detecting current is more than 150 of the rated current Rated current x 150 i Rated current x 105 4 Time RASC 10HRNE 1 2 Detecting current is more than 150 of the rated current Rated Current x 15096 Rated Current x 10596 1 Short circuit trip of arm 2 Instantaneous overcurrent trip 3 Instantaneous overcurrent trip 4 Electronic thermal trip Condition is maintained longer than 30 seconds or accumulated longer than 3 minutes during 10 minutes sampling time Protection of IPM IPM has four protection function for self protection 1 Some of the output terminals between U and V V and W W and U hasa short circuit 2 Running current reaches the maximum rated current 3 Abnormal temperature is measured by internal thermistor 4 Control voltage decreases abnormally Overload control Overload control as a current greater than
238. rature heat source Sharp fins Risk of injury Aluminium fins have very sharp edges Pay attention to the fins in order to avoid injury Use gloves Mount suspension bolts using M10 W3 8 as size as shown below Insert 100 to 150 kg Concrete a Steel beam Anchor bolt Steel Anchor bolt W3 8 W3 8 or M10 or M10 Concrete beam Steel beam 20 SMGBO0043 rev 1 04 2010 Units installation HITACHI Service Manual Inspire the Next NOTE This appliance is not intended to be used by people including children with reduced physical sensory or mental capabilities or lack of experience and knowledge unless they have been given supervision and instruction concerning the use of the appliance by a person responsible for their safety For easy operation and maintenance install the unit with sufficient clearance around it as shown in the next pages Transport the package as close as possible to the intallation location before unpacking Make sure that the foundation is flat levelled and strong enough 1 Install the unit in a place where no seasonal wind might directly blow into the outdoor fan Install the unit in a restricted area not accessible by the general public Cleaning liquid shall be collected after cleaning operation Hitachi indoor units are designed for free air discharge Static Pressure Pst 0 except ducted indoor units as RPIM which require to be connected to discharge air ducts For these un
239. re uH controller on the RPI units L5 02 Low static pressure 00 Normal mE Increasing fan speed RCD 01 Ihcreasinasbeed d This function is used to change the fan RCI mg sp speed due to the high ceiling 02 Increasing speed 2 00 Not available This function is used to increase the fan ru el e Lh Hi speed at heating thermo OFF 01 Available speed when Thermo OFF Cancelling of enforced 3 minutes 00 Not available This function is used to cancel the AJ Lr minimum operation time of enforced 3 minutes minimum operation compressor 01 Available time of compressor Control by indoor 00 A suction thermistor 01 Control by thermistor of 3 ru Thermistor of remote control remote controlswiteh This function is used to control the unit 7 switch Control by average with the thermistor of remote control value of indoor 02 suction thermistor and thermistor of remote control switch La Not prepared LH Not prepared 00 Forced stoppage input A ng gn ra Selection ot forced stoppade ladle contact With this function we select the forced FU nnm m ppag g ol Forced stoppage input B stoppage logic contact LE Not prepared 00 pL Lu Not prepared 01 Not used standard 00 m 00 LE Not prepared oj Not used standard 00 00 Standard 7 steps Draft prevention 5 For draft prevention option the two last rc 01 be Lr Change of louver swing angle steps louver position will be not available i For high celing o
240. ress the HEAT switch again in order to stop the heating process 7 NOTE During the emergency operation the yellow LED blinks 0 5 seconds ON 0 5 seconds OFF c Alarm code display If some malfunction occurs because of the activation of a safety device or any other reason the red RUN LED blinks 0 5 seconds ON 0 5 seconds OFF Refer to the chapter 7 2 1 for the alarm code table The alarm code displays the number of blinks of the green DEF LED and the yellow FILTER LED as shown bellow Green DEF LED Digit 2 of the alarm code blinks Yellow FILTER LED Digit 1 of the alarm code blinks Alphabet code A 10 blinks B 11 blinks C 12 blinks etc Example P Alarm code a Tey Yellow FILTER LED Green DEF LED DEF LED blinks three times 0 5 seconds ON 0 5 seconds OFF FILTER LED blinks 5 times 0 5 seconds ON 0 5 seconds OFF The red RUN LED 1 second ON 1 second OFF means that there is an abnormal transmission between the indoor units and the outdoor unit 116 SMGBO0043 rev 1 04 2010 Test run HITACHI Service Manual Inspire the Next 6 4 Test run procedure from the outdoor unit side The test run procedure from the outdoor unit side is shown below You can set this DIP switch while the power source is ON Setting of dip switch before shipment DSW1 1 Cooling Pin 1 ON 2 Heating Pin 1 2 ON ON 3 Cooling inte
241. ressor E01972 1 E305ALD 27A2 32 Compressor E01973 1 E405ALD 36A2 33 Fan Motor E01974 1 DC 950W 4P 34 Fan Motor E01975 1 DC 350W 4P 35 MG SW P24721 1 1 36 SV Assy E01976 1 1 36 1 Body P25246 1 1 Solenoid Valve 36 2 Coil Harness 20 E02017 1 1 SVA Solenoid Valve Coil 37 C Heater E01977 2 2 38 4 Way Valve P26337 1 1 Reversing Valve 203 SMGB0043 rev 1 04 2010 HITACHI Inspire the Next HITACHI Inspire the Next 8 1 2 Refrigerant Cycle 29 28 65 90 20 f 21 y 70 2 3 79 OG 39 36 Spare parts Service Manual 76 36 1 36 2 Y 45 315 2 38 i J Ha NUES a 18 HH 204 M SMGBO0043 rev 1 04 2010 p Drawing N EPN200809 Spare parts Service Manual No Description Remarks 39 Coil Harness 21 RVR Reversing Valve Coil 40 Transformer TF 41 Reactor DCL 42 Reactor DCL 43 Printed Circuit Board Main PO052 Assy 44 Inv Fin Assy DIP IPM 25A PV051 Assy 45 Inv Fin Assy DIP IPM 17A PV051 Assy 46 SSR 47 Radiation Fin 48 Float Switch 49 Drain Pan Unit 50 Side Cover 1 Assy Assembly 51 Side Cover 3 Assy Assembly 52 Side Cover 2 As
242. ressor chamber THM9 Yes Is the thermistor installed No correctly on the compressor p Install it correctly Yes No Is gas leaking gs Correctly charge refrigerant Yes Repair leaks of gas gt Correctly charge refrigerant Thermistor 200 resistance KQ 100 0 25 50 100 125 150 Temperature 9C Thermistor resistance characteristics 150 SMGBO0043 rev 1 04 2010 Troubleshooting Service Manual HITACHI Inspire the Next Alarm code Description Abnormal operation of thermistor for the indoor unit air inlet temperature UC air inlet thermistor The RUN LED flickers and ALARM is displayed on the remote control switch The unit number the alarm code and the unit code are alternately displayed on the set temperature section The unit number and the alarm code are displayed on the display of the Outdoor unit PCB This alarm code is displayed when the thermistor is short circuited less than 0 24 kQ or cut greater than 840 kQ during the cooling process or the heating process The system is automatically restarted when the fault is removed Is THM1 connected to intake No of PCB Connect it Yes Is the resistance of THM1 No between 0 24kQ and 840kQ e Faulty therm
243. rev 1 04 2010 Spare parts Service Manual i es i ao 2 2z 22 23 83 B grs z e Pf No Description PART No Qty Qty Remarks 1 Terminal Board E01818 1 1 2 Harness PS E01958 1 1 PSH Pressure Switch High 3 Harness PSC E01959 1 1 PSC Pressure Switch Control 4 Fuse P24776 1 40A 5 Fuse P24728 1 50A 6 Fuse E01960 1 1 10A 7 Electrical Wiring Diagram E01961 1 Assembly Components Harness Steel Plates 8 Electrical Wiring Diagram E01962 1 Assembly Components Harness Steel Plates 9 Capacitor P20444 1 18uF 10 Capacitor P22531 1 30yF 11 Thermistor P22520 1 1 TA 12 Thermistor P23507 1 1 TE 13 Thermistor P22573 1 1 TD 14 Noise Filter P26446 1 1 15 EVO Assy E01963 1 1 15 1 Expansion Valve P24691 1 1 15 2 EXPV Coil P24655 1 1 15 3 Strainer P25037 2 2 16 S Valve 5 8 E01964 1 1 Gas Line 17 S Valve 3 8 E01525 1 1 Liquid Line 18 Check JA P25044 1 1 19 Strainer P24398 1 1 20 V P Rubber 1 P17308 4 4 21 V P Rubber 2 P13109 4 4 22 Protector Net 1 E01965 1 1 Inlet 23 Protector Net 2 E01966 1 1 Outlet 24 Fan Assy L E01846 1 1 Fan Casing Runner left 25 Fan Assy R E01843 1 1 Fan Casing Runner right 26 Fan Unit E01967 1 Assembly 27 Fan Unit E01968 1 Assembly 28 Condenser E01969 1 Assembly 29 Condenser E01970 1 Assembly 30 L Tank E01971 1 1 Assembly 31 Comp
244. rge refrigerant after repairing gas leakage Faulty RASC fan at heating operation Faulty RASC fan motor Measure coil resistance and insulating resistance Replace RASC fan motor if faulty 169 SMGBO0043 rev 1 04 2010 H ITACHI Troubleshooting Inspire the Next Service Manual Alarm code Description H H Overcurrent protection activation Turn OFF power and Yes disconnect U V W from No is there any cause of No Restart operation compressor terminals instantaneous voltage Check the Does it trip soon Turn ON 1 of DSW1 on PCB2 decrease P compressor IPM or diplPM and restart It trips D it trip 1 immediately ipi i Yes p Check the power It trips after a Yes it source capacity certain period trips Replace the PCB2 Y IPM or diplPM 1 In case of 400V 50Hz No Is the power supply voltage 400V 10 In case of 230V 50Hz Is the power supply voltage 230V 10 Yes In case of 400V 50Hz No Is the power supply voltage 323V during operation In case of 230V 50Hz Is the power supply voltage 187V during operation Check the capacity and gt No Yes wiring of the power source Is it 170V single phase or 340V 3 phases or more during operation when other devices are operating Yes i 7 As eS No Is the compressor running current the sam
245. rigerant cycle TB cB ELB Terminal board Circuit breaker Earth leakage breaker 7 Field wiring e Field supplied yy Optional accessory 3 4 Wire size Recomended minimum sizes for field provided wires Power source cable size Transmitting cable size Model Power source Max Current EN60 335 1 MLFC EN60 335 1 MLFC LU e o e All indoor units 5A 0 75 mm 0 5 mm 1 230V 50Hz RPI 8 10 10A 1 5 mm RASC 3HVRNE 1 230V 50Hz 28A 6 mm 3 5 mm 0 75 mm 0 5 mm RASC 5HVRNE 1 230V 50Hz 37A 10 mm 5 5 mm RASC 10HRNE 3N 400V 50Hz 33A 10 mm 5 5 mm Except RPI 8 10 The wire sizes marked in the table with are selected by 125 of the maximum current of the unit according to the European Standard EN60 335 1 58 SMGB0043 rev 1 04 2010 Electrical wiring HITACHI Service Manual Inspire the Next The wire sizes marked in the table with are selected by 125 of the maximum current of the unit according to the wire MLFC Flame Retardant Polyflex Wire manufactured by HITACHI Cable Ltd Japan Incase that the power wires are connected in series add each unit maximum current and select the wire size according to the next table Selection according to Selection according to MLFC EN60 335 1 at cable Temp Of 60 C Current i A Wire Size mm Current i A Wire Size mm Is6 0 75 Ix 15 0 5 6 is10 1 15 is18 0 75 10
246. rigerant from the check joint of the liquid stop valves the discharge gas side during the cooling process If the liquid stop valve is fully open it is difficult to charge the additional refrigerant Do not charge the refrigerant from the gas stop valve 256 SMGBO0043 rev 1 04 2010 Field work instruction Service Manual HITACHI Inspire the Next 11 3 Insufficient cooling performance when a long piping is applied Question and answer for the field work Example 2 Insufficient cooling performance when a long piping is applied Phenomenon Sufficient cooling was not available for an indoor unit that was located at the farthest position Cause Countermeasure If the location of an outdoor unit is 20 meters lower than the location of the indoor units resetting of the DIP switch DSW3 is required However no setting was performed Therefore the largest discharge pressure was not increased This resulted in an insufficient cooling performance for the indoor unit Indoor units Insufficient cooling Outdoor unit The setting of the DSW2 was changed Remarks Pay special attention to the size of liquid pipe Refer to piping work in TC for details 11 4 Abnormally high operation sound in the ceiling type indoor unit Question and answer for the field work Example 3 Abnormally high operation sound
247. ring 7 Make sure that each wire terminal L1 L2 L3 and N or L1 and N for single phase is correctly connected at the power Source 112 SMGB0043 rev 1 04 2010 Test run HITACHI Service Manual Inspire the Next NOTE Make sure that the field supplied electrical components main switch fuse fuse free breaker earth leakage breaker wires conduit connectors and wire terminals have been properly selected according to the electrical data in the technical catalog of the unit Also make sure that the field supplied electrical components comply with the national codes and the local codes Use the shielded cables for the field wiring in order to avoid the electrical noise The length of the shielded cable should be less than 1 000 m The size of shielded cable should comply with the local codes Make sure that the terminals for the power supply wiring L1 to L1 and N to N of each terminal board for AC380 415V R to R and T to T of each terminal board for AC220V and the terminals for the intermediate wires between the indoor unit and the outdoor unit Operating Line terminals of each terminal board for DC12V coincide correctly Otherwise you may damage some components Check to ensure that the crankcase heater is turned ON for more than 4 hours The operation is not available within 4 hours after turning ON the power supply Check to ensure that the main source has been ON for more than 12
248. riority order a Higher priority is given to protection control related to frequency control than the other lt Priority order gt High pressure increase protection Over current protection Cold draft protection Low pressure ratio control at cooling operation HITACHI Inspire the Next b In relation to retry control the latest retrial will be indicated unless a protection control related to frequency control is indicated Code Protection control Code Protection control Dx La Low pressure ratio control at cooling operation x ui ut High pressure ratio control at heating operation High pressure increase protection ut t Frost formation protection n 4 a Unbalance power source detecting pa Li Current demand control x x Jal Ex Over current protection Low pressure decrease protection x Cold draft protection r1 Ix EM IPM fin temperature increase protection Li i D Discharge gas temperature increase protection Retry indication continues for 30 minutes unless a protection control is indicated Retry indication disappears if the stop signal comes from all rooms Code Protection control Li ri I za x pad rt Inverter retry O NOTE The protection control code being indicated on 7 segment di
249. rious injuries Perform the high voltage discharge procedure as described Magnetic contactor Inverter module ISPM Reactor Capacitors LED 201 Noise filters e Procedure using an analog tester Rectification parts of internal circuit of ISPM common f o P1 Checking the diode module A RA R S 1 By touching the side of the tester to the P1 T terminal of ISPM and the side of the tester to R A A and S of ISPM measure the resistance If all the ET resistances are more than 1 KQ it is normal 2 Bytouching the side of the tester to the P1 E Li s SUE uus terminal of ISPM and the side of the tester to R 7 ml oe I ll 5 and S of ISPM measure the resistance If all the e el mego o OD o resistances are more than 100 kQ it is normal em e oo e 3 By touching the side of the tester to the N VUE palesa V c terminal of ISPM and the side of the tester to R and S of ISPM measure the resistance If all the resistances are more than 1 KO it is normal 4
250. rmediate season poe Pin 1 3 ON 123 Heating intermediate season Pin 1 2 3 ON 5 Manual compressor OFF Pin 1 4 ON A WARNING Electrical hazard Can cause serious injuries Do not touch any other electrical components while you are setting the switches on the PCB NOTE Set all the DIP switches of DSW1 to OFF after completing the test run Dip switch seting Operation Remarks 1 Setting operation mode Make sure that the indoor units start to operate in accord with the a Cooling ON test run of the outdoor unit 6 Set DSW1 1 ON If you start the test run from the outdoor unit and you stop the test run from the remote control Switch the test run function of the remote control switch is cancelled However the test run function of the outdoor unit is not cancelled If the more than one indoor unit is connected with one remote control 0 NE on AD The indoor unit automatically starts to operate when the test run of the outdoor unit is set You can perform the ON OFF operation from the b Heating SET DSW1 1 and 2 ON NOE on NI Test run c Cooling intermediate ON ee MU MIN A Switch all the units start the test season B m iu m 3 Continuous operation durinc run at the same time Therefore Set DSW1 1 and 3 ON 1234 p 9 turn OFF the power source so that 2 hours is performed without the Thermo OFF condition the indoor units do not p
251. rmer Primary side 220 230 or 240 V Secondary side o o G z e gt o c G gt E o 3 Isthe wiring loosened or incorrectly connected Check the wiring connection on the PCB Thermistor connectors Connector of the remote control cable Connector of the transformer Each connector in a high voltage circuit Check the connectors according to the electrical wiring diagram 11 2 Burnt out compressor due to an insufficient refrigerant charge Question and answer for the field work Example 1 Burnt out compressor due to an insufficient refrigerant charge Phenomenon Cause After commissioning the alarm code 08 sometimes occurred and the compressors were burnt out after operating for two months The refrigerant piping work was performed during the summer season The additional refrigerant was not sufficiently charged from the discharge gas side This insufficient refrigerant charge resulted in the overheating of the discharge gas and the oil deterioration which was finally due to the separated operation despite the alarm code 08 Countermeasure 1 The compressor was replaced with a new compressor 2 The correct refrigerant amount was charged according to the refrigerant piping length and the connected indoor units Remarks Additional refrigerant charge Open the liquid stop valves slightly when you charge the additional ref
252. rts Service Manual This part is used for changing the alternative current to the direct current for the inverter Connect two capacitor in line and used RASC 10HRNE 3N 400V 50Hz Items Specifications Models LNX2G472MSEAHE Capacity of static electricity 4700 uF Rated voltage 400 VDC Permissible temperature range 25 C to 95 C 150 10 7 Reactor DCL zd 063 5 This part is used for changing the alternative current to the direct current for the inverter RASC 3 5 HVRNE 1 230V 50Hz Items Specifications Characteristics 0 68 mH 15 at 1kHz Rated current 25A Direct resistance 31 mo Permissible temperature range 20 C to 60 C 252 SMGBO0043 rev 1 04 2010 Main parts Service Manual RASC 10HRNE 3N 400V 50Hz HITACHI Inspire the Next Items Characteristics Specifications 1 0 mH 10 at 1 kHz Rated current 30A Direct resistance 22 8 MQ 20 at 20 C Permissible temperature range 20 C to 65 C 66 74 253 SMGBO0043 rev 1 04 2010 85 max 10 HITACHI e Inspire the Next OOOO Service Manual 10 8 Scroll compressor 10 8 1 Reliable mechanism for low vibrating and low sound 1 The rotating direction is definite 2 The pressure inside of the chamber is high pressure and the surface temp
253. ry side Replace the transformer Replace the cable or repair the Disconnected cable of the remote control switch Connect the cable cable Insufficient connection or incorrect connection of the indoor Insufficient contacting at the unit EOB connectors of the remote control Insufficient connection Check the connectors Correctly connect the connector switch or incorrect connection of the indoor unit PCB in the remote control switch Check the remote control switch Replace the remote control T Pollut ol INe Emote CONOS WIGN using the self check mode 1 switch if it failed Unconnected wires to PCB Check the connectors Correctly connect the wires Failure of PCB Check PCB using the self check Failure of PCB mode 2 Replace PCB if it failed Take action according to the procedure that is displayed in Incorrect wiring connection TEST RUN 1 Refer to section 7 3 2 2 Refer to section 7 3 1 125 SMGBO0043 rev 1 04 2010 HITACHI Inspire the Next Troubleshooting Service Manual 7 1 3 Abnormal transmission between the remote control switch and the indoor unit RUNLED on the remote control switch Flickering every 2 seconds Phenomenon Cause Check item Action Turn OFF the main switch Disconnection or insufficient contacting of the remote control cable Check the cable and the connections Repair the cable or connect the cable Failure of t
254. s do not accept certain settings or do not have the functions that relate to the activated settings Check the available settings beforehand Note down the option selected in the settings column on the table 5 3 1 Alarm indication The run LED green will flash The LCD screen will show the following information No of indoor unit affected by the alarm Alarm code Unit model No of indoor units connected to the system 7 NOTE For more information on alarm indications check the installation and operation manual for the outdoor unit 109 SMGBO0043 rev 1 04 2010 HITACHI Inspire the Next Available optional functions Service Manual 5 4 Available optional functions through wireless remote control switch PC LH3A receiver You can adjust the following optional functions with the DIP switches of the receiver PC RLH8 9 11 1 Only for PC ALHD 11 13 DIP switch Optional function 1 2 3 4 Setting of sub receiver part O Identifying the indoor unit O 1 g NOTICE Turn OFF all the power sources before setting the DIP switches Setting of sub receiver part For this optional function set pin marked with O to ON PC RLH8 9 11 13 Open the lid of case by removing two screws so that the following functions are available PC ALH Switch COOL Switch HEAT TT DIP sw
255. scharge Angle Air 00 Approx 30 to 60 Standard Operation Discharge 01 Approx 30 to 50 Draft Prevention Angle 02 Approx 40 to 60 For High Ceiling Power supply ON OFF 1 4 This function is used to start and stop the unit according to the power supply ON OFF When this function is used in the condition that there is no person to operate the unit make the system with monitoring for disaster prevention 7 NOTE The unit is started and stopped according to the power supply ON OFF due to the power failure When the power failure is occurred during stoppage by the remote control switch operation the unit is started again automatically after the power supply is recovered Not prepared dz Restart function after power failure 3 This function is used to start the unit operation again automatically when the power supply is recovered after the power failure over 2 seconds The standard unit is started operation again automatically with all the same operating conditions such as operation mode etc in case of the power failure within 2 seconds The compressor unit is started operation again after three minutes guard in addition to 2 seconds power failure as a maximum 102 SMGBO0043 rev 1 04 2010 Available optional functions H ITACHI Service Manual LLL Inspire the Next 7 NOTE Incase of power failure during the unit stoppage the unit is stopped after recovering the p
256. se of H LINK system this alarm code is indicated when DSW4 RSW1 for refrigerant system setting on the outdoor unit PCB and DSW5 RSW2 for refrigerant system setting on the indoor unit PCB are incorrectly set In this case set correctly DSW4 RSW1 DSW5 and RSW2 after turning OFF main switch HITACHI Inspire the Next Troubleshooting Service Manual Alarm code Description zr at ot Incorrect indoor number setting The RUN LED flickers and ALARM is displayed on the remote control switch The unit number the alarm code and the unit code are alternately displayed on the set temperature section The unit number and the alarm code are displayed on the display of the outdoor unit PCB This alarm code is indicated 3 minutes after power is supplied to the outdoor unit when the indoor unit no connected to the outdoor unit is duplicated by setting of RSW This alarm code is indicated when 5 or more indoor units are connected to one outdoor unit O NOTE Incase of H LINK system this alarm code is indicated when DSW4 RSW1 for refrigerant system setting on the outdoor unit PCB and DSW5 RSW2 for refrigerant system setting on the indoor unit PCB are incorrectly set In this case set correctly DSW4 RSW1 DSW5 and RSW2 after turning OFF main switch DSW2 is not equipped with some models 162 SMGBO0043 rev 1 04 2010 Troubleshooting HITACHI Serv
257. splay is changed to an alarm code when the abnormal operation occurs Also the same alarm code is indicated on the remote control switch 185 SMGB0043 rev 1 04 2010 HITACHI Inspire the Next e Activating condition of protection control code For following the conditions as the temperature change etc the control of frequency etc is performed to prevent the abnormal conditions by the protection control The activating conditions of protection control are shown in the table below Troubleshooting Service Manual Code Protection control Activating condition Remarks ui TI r4 Low pressure ratio control at cooling operation Compression ratio lt 2 2 gt frequency increase Pd 0 1 Ps 0 1 x High pressure ratio control at heating operation Compression ratio gt 7 5 frequency decrease Pd 0 1 Ps 0 1 Li ni V High pressure increase protection High pressure switch for control is activated frequency decrease Dx PUN Over current protection Inverter output current gt 1 A gt frequency decrease ut EUM dipIPM ISPM or IPM temperature increase protection Inverter fin temperature RASC 3 5 HVRNE gt 80 C RASC 10HRNE gt 100 C gt Frequency decrease vui DC Discharge gas temperature increase protection Temperature at the top of compressor is high frequency decrease Te
258. ss the main power switch is OFF Check that the earth wire is securely connected tagged and locked in accordance with national and local codes Check and test to ensure that if there is more than one source of power supply that all are turned OFF Check to ensure that the indoor fan and the outdoor unit have stopped before electrical wiring work or periodical check is performed Check to ensure that the screws of the terminal block are tightly tightened A CAUTION Damage to wires Risk of fire Protect the wires drain pipe and electrical parts from rats or other small animals If not protected rats may damage unprotected parts Wrap the accessory packing around the wires and plug the wiring connection hole with the seal material to protect the product from any condensed water and insects Tightly secure the wires with the cord clamp inside the indoor unit Lead the wires through the knockout hole in the side cover when using conduit Secure the cable of the remote control switch with the cord clamp inside the electrical box Electrical wiring must comply with national and local codes Contact your local authority in regards to standards rules regulations etc Check that the ground wire is securely connected Electrical hazard Risk of fire Connect a fuse of specified capacity 7 NOTE In case of performing a test run operation take especially care because some security features
259. ssor is stopped and the indoor units are on thermo OFF Protection against cold air discharge 1 Protection against cold air When the discharge temperature of the air in the indoor unit is less than or equal to 10 C in cooling mode the discharge 2 compressor stops and alarm no 24 appears This function controls the outdoor unit consumption in the following way Wave function setting It allows a consumption of 10096 for 20 minutes The following 10 minutes it goes down to 7096 and then alternates between 100 and 70 indegrunit SE cO This function reduces the power consumption of the indoor unit according to the temperature temperature setting Piping for the R407C If you use conventional R407C piping instead of the R410A the piping pressure will increase This function is activated in order to avoid this pressure increase Alternation in defrost This function is useful in an installation consisting of various outdoor units placed in the same H LINK The mode activation defrost mode is activated alternately in each outdoor unit Fixing the cooling mode This function sets the cooling mode the indoor unit will only start when the system is on COOL or DRY Fixing the heating mode This function sets the heating mode the indoor unit will only start when the system is on HEAT or DRY FAN This function provides information on the units operation operation alarm compressor ON defrosting signals Signal capture so the necessary
260. stic holders using long nose pliers as shown in the picture below Pull out the PCB from the PCB plate Location of plastic holders 236 SMGB0043 rev 1 04 2010 Servicing H ITACH i Service Manual spire the Next 9 2 13 Removing electrical components A DANGER Electrical hazard Risk of death Check that the LED201 red located on the DIP IPM is OFF Do not touch the electrical components when LED201 Red is ON in order to avoid an electrical shock Do not touch the electrical components of the PCB directly 7 NOTE When handling the PCB take care of components Do not apply excesive force to them in order to avoid damaging the motherboard and failures 1 Revome the piping service cover by removing the three 3 fixing screws Pull up and remove the cover using the handle 2 Remove the two 2 screws fixing the PCB plate and turn it towards the front side 3 To remove the electrical components Remove the reactor by removing the four 4 Screws Disconnect the wiring connected to the magnet contactor and remove the magnet contactor by unscrewing the two 2 screws Disconnect the wiring connected to the SSR and remove the SSR by unscrewing the two 2 screws Disconnect the fasten connection to the capacitor and remove the capacitor by unscrewing the two 2 screws Disconnect the wiring connected to the noise filter Remove
261. stor module 1 By bonding P to UVW or N to UVW no continuity and no variation on voltage drop should appear 2 By bonding P to UVW or N to UVW continuity and variation on voltage drop nearly 0 405 should be displayed and the same value in all cases Not the same value means that the diode module is damaged e Checking capacitors CB1 amp CB2 A DANGER Electical hazard Can cause serious injuries or death Before installing the electrical wiring or before performing a periodical check turn OFF the main switch of the unit Turn off the unit and wait for the LED 201 to be off before touching the components Prevent from touching the capacitors terminals High voltage should be present before discharging them If it s possible check the capacitance of each capacitor 4700UF 20 between 3760yF to 5640uF A visual check of the pressure valve of capacitors must be done to ensure it s integrity Normality Swelling of pressure valve It is not recommended to check tension PN Power source x V2 PC CN is nearly equal to PN 2 R1 amp R2 1 If the value is different Capacitor could be damaged by overload 04 alarm could be displayed if low supply voltage CN for ISPM control part is present 195 SMGBO0043 rev 1 04 2010 H ITACHI Troubleshooting Inspire the Next Service Manual 2 R1 2 9 50 amp R2 14 00 If these values are different the capacitors will be no
262. switch Faultv float switch Faulty contactin Measure the resistance Fix the looseness and y y 9 using the tester Replace the connector Faulty connection Check the connections Repair the connection Check PCB using the Faulty indoor unit PCB self check mode 1 Replace PCB if faulty 1 Refer to section 7 3 1 and 7 3 3 Alarm code 01 is not displayed at the RPK series 137 SMGB0043 rev 1 04 2010 Troubleshooting HITACHI Inspire the Next Service Manual Alarm code Description i H d Activation of the safety device in the RASC unit The RUN LED flickers and ALARM is displayed on the remote control switch The unit number the alarm code and the unit code are alternately displayed on the set temperature section The unit number and the alarm code are displayed on the display of the outdoor unit PCB This alarm is indicated when one of safety devices is activated during compressor running Does CMC1 ON No Is the voltage 240V No No when starting or 220V existing at Is the protective Faulty PCB1 the 1 to 3 of PCN9 device still operating during Y52C is ON Yes Yes Yes Yes Does CMC1 turn No Is the protective ON for more than dnce st ind Faulty PCB1 3 seconds evice stiil operating No Y No Is the CMC1 coil S N
263. sy Assembly 53 E Box Cover Assy Assembly 54 U Cover 2 Unit Assembly 55 Fan Cover Unit Assembly 56 Side Stay Cover Assy Assembly 57 Valve Cover 1 Assy Assembly 58 Valve Cover 2 Assy Assembly 59 Wiring Cover 60 Corner Cover Assy Assembly 61 B Base Assy Assembly 62 U Cover 1 Assy Assembly 63 Suction Cover 1 Assy Assembly 64 D Cover Assy Assembly 65 Comp Base 66 Thermistor For Inverter 67 Fuse Holder 68 Handle 69 Rubber Bushing 70 Special Nut 71 Spacer KGPS 72 Fan Partition Plate 73 Holder 74 Capillary Assy 75 SV Stay 76 Side Partition Plate 77 FS Stay 78 Fuse Holder 79 Pipe Assy 80 Casings Stay 205 SMGBO0043 rev 1 04 2010 HITACHI Inspire the Next HITACHI Inspire the Next 8 1 3 Electrical equipament Surface Surface I I Age n 4445 66 amp Surface oa Spare parts Service Manual 14 69 9X9 71 67 OG 206 SMGB0043 rev 1 04 2010 m 799 84 Drawing N EPN200809 Spare parts Service Manual 207
264. t Setting of the optional signals The optional signals of the outdoor unit are set up from the Input setting 1 lt Factory setting PCB of the outdoor unit and push switches PSW1 PSW2 CN1 1 2 J and PSW3 PSW1 Selection of the input signal m Powe pos If the below setting change is required on site perform t rH the following instructions 1 While the outdoor unit is ON set the following DIP Input setting 2 y lt Factory setting switches on the printed circuit board of the outdoor CN1 2 3 xL Pa im unit as follows set pin 6 of DSW2 to ON Because of these settings the function selection mode PSW1 7 i x SET PSW2 PSW3 becomes available and the following indication appears on the 7 segment display E n Input setting 3 lt q Factory setting CN2 1 2 J 4 Pid 4 gt 40 4 t y PSW1 Input output Function No SET poe pews terminal n r1 Lt This indicates that function No 1 set heating mode is set at input 1 Output setting 1 a Factory setting 5 CN7 1 2 Ft 2 By pressing the push switches PSW1 PSW2 a PSW1 and PSW3 you change the input output terminal SET PSW2 PSW3 name The flowchart shown on the side reflects the n n changes
265. t OOS LLL Service Manual e RASC 10HRNE rtm L1 L2 L3 N 1 2 ACc400v DC5V Power Transmission wires wires ue Transmission Power wires Earth Terminal Clamp Power wires h wires 3 2 2 Setting of DIP switches for outdoor unit Quantity and location of DIP switches The PCB in the outdoor unit is operating with 5 types of DIP switches 1 slide switch and 3 push switches The location is as follows SEGI B B PSWI PSWe PSW3 KOKA RE 7 NOTE The mark y indicates position of dips switches Figures show setting before shipment or after selection Before setting dips switches firstly turn off power source and set the position of the dips switches If the switches are set without turning off the power source the contents of the setting are invalid 54 SMGB0043 rev 1 04 2010 Electrical wiring HITACHI Service Manual Inspire the Next e DSW1 Test run Function Setting position Remarks ON Setting before shipment waa 1234 l ON Continuous operation during Test run for cooling LT 2 hours is performed without thermo OFF The 3 minutes guard ON for compressor protection is Test run for heating AREE not effective during the test run 1234 operation ON The compressor is OFF during this
266. t air temp To Cause of stoppage at inverter iT Inverter secondary current A2 O U address nA Indoor unit unit no 1 I U expansion valve opening EA Liquid pipe temp of I U Freeze protection LA I U intake air temp iA I U discharge air temp oA Cause of I U stoppage dA Indoor unit unit no 2 I U expansion valve opening EA Liquid pipe temp of I U Freeze protection LA I U intake air temp iA I U discharge air temp oA Cause of I U stoppage dA Indoor unit unit no 3 I U expansion valve opening EA Liquid pipe temp of I U Freeze protection LA I U intake air temp iA I U discharge air temp oA Cause of I U stoppage dA Indoor unit unit no 4 I U expansion valve opening EA Liquid pipe temp of I U Freeze protection LA I U intake air temp iA I U discharge air temp oA Cause of I U stoppage dA O U Outdoor unit I U Indoor unit FAN1 FAN2 Constant speed fan 52C CMC PSH High pressure switch 20A Solenoid valve SVA 20F Solenoid valve SVF 21 Reversing valve RVR CH Oil heater Multiply 1 8 by the code on the 7 segment 262 SMGB0043 rev 1 04 2010 Field work instruction Service Manual 11 11 Service and maintenance record by remote control switch Data sheet for checking by remote control switch Time I U model U serial no I U no alarm code Check Check T mode 1 mode 2 B Temp indication
267. t properly charged Resistance between P1 amp TB3 2kQ white resistance in the ISPM In case that Mg SW 52C CMC 1 is not ON the compressor current will travel through these resistances and they will be broken Mg SW 52C CMC1 should be checked Check the resistance between the primary and secondary terminal where the contact point is melted for Mg SW 42C If there is continuity the contact is melted and 52C is broken NG Reactor resistance can be messured between TB3 and RB 0 20 Checking this component is not necessary 7 NOTE Both digital or analog testers are valid to check the values Noise filter does not affect ISPM directly so is not necessary to check it when ISPM fails e Checking procedure for the electronic expansion valve Indoor unit electronic expansion valve Outdoor unit electronic expansion valve Check the liquid pipe temperature during the heating process It is abnormal if the temperature does not increase Locked with fully closed It is abnormal if the liquid pipe pressure does not increase during the cooling process It is abnormal under the following condition the temperature of the freeze protection thermistor becomes lower than the suction air temperature when the unit which is under Locked with slightly open cooling process Electronic expansion valve Freeze protection thermistor gt Locked with fully open chechink sto
268. t ro r1 Not available protection 1 F Lt Li PSW1 SET PSW2 PSW3 Available Cold draft oy r1 Not available protection 2 F Li PSW1 SET PSW2 PSW3 Available Available optional HITACHI functions Inspire the Next Service Manual Fixing of demand function This function regulates the running current of the outdoor unit If the demanded current is above the set current the indoor unit capacity is reduced The running current can be regulated both from internal signal The capacity regulation is 50 75 100 This function can be activated when the demand is selected at one of input terminal indications and 3 r a In case that multiple demand functions are set the input terminal indications v and 3 The demand running current is selected with 5 amp 1 PSW1 Wave function setting This function regulates the power consumption of the outdoor unit While this function is activated the maximum limit of running is changed as shown bellow Electricity consumption at cooling 10096 Electricty i consumption 1 at cooling 50 1 75 L 20 min 10 min 20 min 10 min 20 min 10 min 20 min This function can be activated when the demand is selected at one of input terminal indications and 3 The minimum limit of running current control is according to the set value of the demand function If the demand function is not set at the input terminal indication this functi
269. t when installing Risk of explosion A fire may occur Use of inflammable agent may cause explosion or fire For cleaning operation use non inflammable and nontoxic cleaning liquid Oxygen deficiency Toxic gases may be produced Work with sufficient ventilation Working in an enclosed space is dangerous Toxic gas may be produced when cleaning agent is heated to high temperature by e g being exposed to fire Electric shock Electrical hazard In order to avoid electric shock or fire pay attention not to clamp cables when attaching the service cover Electrical hazard Electrical discharge This unit contains condensers that might remain charged once the unit is switched off Wait at least five minutes after the stop of the unit before to start any cleaning or maintenance operation allowing the discharge of the condensers A CAUTION Malfunction Unit failure When installing more than one unit together keep clearance of more than 50 mm between units and avoid obstacles that could hamper air intake Malfunction Short circuit Keep cleareance of more than 3000 mm between the wall without vent holes and air inlet outlet Electromagnetic contamination Equipment failures Install the unit as far as possible being at least 3 meters from electromagnetic wave radiator such as medical equipment Overheat of the unit Malfunction Install the unit in the shade or not exposed to direct sunshine or direct radiation from high tempe
270. tall an electric heater field supplied at the drain connection 49 SMGB0043 rev 1 04 2010 Electrical Wiring H ITACHI Service Manual Inspire the Next 3 Electrical Wiring This chapter describes the procedures to carry out the electrical wiring connections for outdoor units 3 eure Ic Pm 51 SEU MEECI TIE SPENT UTI IEETE Em 52 3 2 Electrical wiring for outdoor units ssssseseenenenne AEREE AANE ene 53 3 2 1 Electrical wiring connection for outdoor units ssssseeeeeeneene enm nennen 53 3 3 2 2 Setting of DIP switches for outdoor unit sessseeeenemeem e enne 54 3 3 Electrical wiring between indoor unit and outdoor unit sssee e 57 34 Wire SiZe m 58 3 5 Electrical wiring diaQramMs c cece cere e reenter eerie eee e eee eee ee enter eee naaeeeeeeseeeessnaeeeeesenaaes 60 3 5 1 Electrical wiring diagram for RASC 3 S HVRNE sssssseeeeeeenenen nene nennen nennen enne 60 3 5 2 Electrical wiring diagram for RASC 10HRNE sssssssseeeeeneen eene nene nennen eere nennen 61 51 SMGBO0043 rev 1 04 2010 Electrical wiring HITACHI Inspire the Next OOOO Service Manual 3 1 General check A DANGER Electrical hazard Can cause serious injuries or death Do not connect or adjust any wiring or connections unle
271. taverte 235 9 2 12 REMOVING the PCB osorioi saiit t HR ERR isla SERRE EAE HRS HERE apccecanes Ie ERR SERIE ErEM daraga een ESEE aaiae 236 9 2 13 Removing electrical components c cniseee crinem etienne eet autore nerui k n aiiai 237 9 3 Collecting refrigerant for replacing indoor unit em 238 215 SMGBO0043 rev 1 04 2010 HITACHI d Inspire the Next Service Manual A DANGER Electrical hazard Risk of death Before performing any of the service operations described in this chapter turn all the main switches off and place security lockers or convenient warning indicators in order to prevent them from turning on accidentally Check and be sure that the LED201 Red on the inverter PCB is OFF for all electrical maintenance Do NOT touch the electrical components when the LED201 Red on the inverter PCB is ON to avoid electrical shock A WARNING Crush hazards Can cause serious injuries Incase of sharped edged parts as covers use security gloves to avoid getting injured Incase of blocked or stucked parts use appropiated tools and eventually lubricants to release them When performing brazing work besides security gloves it is a must to wear convenient eye protection 7 NOTE All compressors are connected by brazing Check to ensure whether there are flammable things around or not when using a burner for pipe connections if
272. tch Fault Check resistance Replace thermistor if faulty Faulty top of compressor thermistor Incorrect connection Check wiring to PCB1 Repair wiring and connections Faulty PCB1 Replace POBI and check Replace PCB1 if faulty operation 158 SMGB0043 rev 1 04 2010 Troubleshooting Service Manual HITACHI Inspire the Next Alarm code Description zi LEE Abnormal operation of the inlet air temperature thermistor RASC unit outdoor ambient thermistor The RUN LED flickers and ALARM is displayed on the remote control switch The unit number the alarm code and the unit code are alternately displayed on the set temperature section The unit number and the alarm code are displayed on the display of the RASC unit PCB This alarm code is displayed when the thermistor is short circuited less than 0 2 kQ or cut greater than 500 kQ during the operation However this alarm occurs during the test run mode only In the case that the thermistor is abnormal during the operation the operation continues based on the assumption that the outdoor temperature is 35 C cooling 6 C heating Is the thermistor THM7 TA connected to PCB1 Yes Is the resistance of THM7 between 0 24 kO and 500 kO Yes Faulty PCB1 Connect it gt Faulty thermistor Thermistor characteristics 90 80 74 Q M o 60 50 43 40 33
273. tch RSW Refer to the section 7 2 2 Troubleshooting using the alarm code for the description of the alarm code 35 124 SMGB0043 rev 1 04 2010 Troubleshooting HITACHI Service Manual Inspire the Next 7 1 2 Failure of the power supply to the indoor unit and the remote control switch The LED and the LCD are not indicated Not operated If the fuses are blown out or a breaker is activated investigate the cause of the overcurrent and take the necessary action Action Phenomenon Cause Check item Turn OFF the main switch Measure the voltage using the Power failure or power is not ON voltmeter Supply the power Short circuit supplied between Check for any uncovered part of Remove the cause of the short T the wires the wires circuit and replace the fuse Blown out fuse or activation of the breaker at the power source Measure the insulation Remove the cause of the short Short circuit of the wires to earth aor resistance circuit and replace the fuse Short circuit supplied between Check for any uncovered part of Remove the cause of the short the wires the wires circuit and replace the fuse Blown out fuse at the control circuit Ms Short circuit of the control circuit Measure the insulation Remove the cause of the short to earth resistance circuit and replace the fuse Measure the voltage at the Failure of the transformer at the indoor unit side seconda
274. tdoor unit Failure of the comp motor Measure the resistance between two wires Failure of the comp Replace the compressor Check for an abnormal sound from the comp Failure of the magnetic switch for comp Insufficient contacting Check that the magnetic Switch activates correctly or not Replace the magnetic switch Disconnected wiring to PCB Failure of one of PCBs Correctly connect the Check the connections nk wiring Failure of PCB Check PCB using the self check mode 1 Replace PCB if it failed The comp does not stop or start even if the setting temperature on the LCD changes to 3 Failure of thermistor Failure of air inlet thermistor Disconnection of thermistor Abnormal operation of the remote control switch cord Replace or correctly connect the wires if abnormal operation exists Check it by self checking 2 Failure of the indoor unit PCB Check PCB using the self check mode 1 Replace PCB if it failed 127 SMGBO0043 rev 1 04 2010 HITACHI Inspire the Next Abnormal operation of the devices Cont Troubleshooting Service Manual Phenomenon Cause Check item Action Turn OFF the main switch Incorrect optional setting The comp does not stop or start even if the setting temperature on LCD changes to 3 Check the setting condition of remote control thermostat using the optional set
275. tem installation seessesee nem nemen 45 2 6 1 Height difference between indoor units and distributor ees e 45 2 6 2 Minstalling CISt DULOM c 45 2 7 Rasc unit factory refrigerant charge wo kg 47 2 8 Additional refrigerant charge calculation ssssssseee nenne 47 PA EBISI Nel EEUU 48 27 SMGBO0043 rev 1 04 2010 Piping installation H ITACHI Service Manual Inspire the Next 2 1 General notes Connect all pipes as close as possible to the unit so that disconnection can be easily performed when required Install the drainage in accordance with national and local codes Do not install the drain pipe in an up slope position Installing it like this the drain water cannot be evacuated and will flow back to the unit causing a possible leakage when the operation is stopped Always install the unit higher than the exit of the pipe Making this so the water will flow easily to the outside Incorrect rising part INCORRECT SS Incorrect up slope It is recommended to use flexible joints for the piping of water inlet and outlet so vibration will not be transmited Do not connect the drain pipe with the sanitary piping the sewage piping or any other drainage piping The drain pipe will require insulation if it is installed in a location where the ambient humidity may condensate on the drain pipe outer surface This condensation could drop and caus
276. terminals for transmission 1 and 2 Burning surface Heat wounds Do not touch any of the parts at the discharge gas side with your hands because the compressor chamber and the pipes at the discharge gas side are hot at a temperature higher than 90 C Electrical discharge Can cause serious injuries Do not touch any electrical components for more than three minutes after turning OFF the main switch e Checking procedure 1 Make sure that the stop valve of the gas line and the stop valve of the liquid line are fully open 2 Make sure that there is no refrigerant leakage The flare nuts sometimes loosen because of the vibration during the transportation 3 Make sure that the refrigerant piping and the electrical wiring belong to the same system Make sure that the setting of the unit number of DSW1 DSW6 and RSW1 of indoor units correspond to the system 4 Make sure that the setting of the DIP switches on the printed circuit board of the indoor units and the outdoor units are correct Especially pay attention to the setting of the lift between the indoor units and the outdoor units Refer to chapter 3 Electrical Wiring for details 5 Make sure that the switch on the main power source has been ON for more than twelve hours in order to warm the compressor oil by means of the oil heater 6 Check whether or not the electrical wiring of the indoor units and the outdoor units are connected as shown in chapter 3 Electrical Wi
277. the RUN STOP switch again MODE NOTE O E time switch in the Remote control TEST RUN operation ignores the temperature limitation and ambient temperature during heating operation to have a continuous operation but the protections are alive Therefore the protection may activate when the heating TEST RUN operation is performed in high ambient temperature TEST RUN operation time can be modifyed increased depressing the RUN STOP O b If the unit does not start or if the operation LED on the remote control switch is flickering there is some abnormal operation Go to O RCS indication Unit condition Fault Inspection points after the power source is OFF The operation LED flickers 1 time 1 sec and the unit number and the alarm code 03 flicker The power source of outdoor unit in not turned ON The connect wires of the operating line are incorrect or loosened The unit does not start 1 The connection order of each terminal board The fuse on the PCB may have blown out due to an incorrect wiring g NOTE Recovering method of FUSE for operating circuit There is a fuse FUSE4 on Indoor Unit PCB1 EF1 on Outdoor unit PCB1 to protect operating circuit on the PCB when the power lines are connected to operating lines If fuse is melted operating circuit can be recovered once by setting the dip switch on the PCB as shown in 2 The screw fastening of
278. the drain outlet parts are slightly approx 20 mm lower than the other side in order to avoid incorrect drain discharge Mark Anchor bolt pitch Model 3 5HP 10HP A mm 1250 1770 B mm 1300 1113 N Description 1 Unit e a this portion of the bolt Otherwise it will i e an obstacle to remove the service cover aj Mortar hole 0100 x Depth 150 bi 4 Anchor bolt M10 a 6 Drainage Wide 100 x Depth 150 e 6 Drainage 2 Yo Vibration proof rubber Suspended unit Installation in the ceiling Suspend the unit as the drawing indicates Ensure that ceiling can resist the unit weight which is indicated in the specification label Install the unit so that the drain outlet parts are slightly approx 20 mm lower than the other side in order to avoid incorrect drain discharge 24 SMGBO0043 rev 1 04 2010 Units installation Service Manual Mark Sling bolt pitch Model 3 5HP 10HP A mm 1250 1770 B mm 1300 1113 Sling bolt M10 HITACHI Inspire the Next A WARNING Unit fall down Can cause serious injury or death If the unit is suspended in the ceiling ensure that the place for installation is strong enough If not reinforce the place with beams etc more than 150 kg for one sling bolt 1 1 5 Available configurations Different configurations are available for RASC unit only changing
279. the drain pan by removing the two 2 screws 218 SMGB0043 rev 1 04 2010 Servicing Service Manual 2 Screws LED 201 M5 Screws Servicing l HITACHI Service Manual Inspire the Next 7 Remove the three 3 screws fixing the fan stay and slowly begin to draw it towards by paying attention to the wiring and the drain pan When half of the fan unit is out disconnect the Screws connector for the fan motor and pull out the fan motor unit completely A CAUTION Lifting hazard Single person operation could cause injury Fan unit weight is approx 30Kg Use two man lift 8 Once with the fan unit on the floor remove the four 4 screws at the back side of the casing and remove the stay 9 Turn the casing so the screws fixing each fan motor are visible and remove the screws 4 per fan Also remove the bolt fixing each motor shaft 10 Remove the fan motor by removing the fixing bolts and fixing brackets Connector 11 Reassemble the parts in the reverse order of removing order 7 NOTE Pay special attention when placing the whole set again inside the unit as there are some flat steel pieces to hold the whole spare part at the end of the rail Push the set to wall and at the same time push it inside See photo besides Always wear gloves when performing mechanical works Bolt Screws Fixing brackets 219 SMGB0043 rev 1 04 2010
280. the inlet outlet air panels and fan position for the case of RASC 10HRNE e Air inlet modification optional Changing air inlet is only necessary to interchange the indicated panels position Both panels use screws to be fixed to unit chasis 25 View from top Factory supplied SMGBO0043 rev 1 04 2010 option H ITACH I Units installation Inspire the Next Service Manual e Air outlet modification option only for RASC 10HRNE Changing air outlet is necessary to interchange panels too Fan outlet panel is attached to fan structure which must be mounted as follow Change panel 1 1 6 Duct connection Install the duct with down slope to prevent entry of rain water Also provide insulation for duct and connection in order to prevent dew formation i E j 1 50 or more T l E B 3 F 26 SMGB0043 rev 1 04 2010 Piping Installation HITACHI Service Manual Inspire the Next 2 Piping Installation This chapter provides information about the procedures to perform water piping work connections for outdoor units 2 Piping installation ERROR PT 27 2 2 1 General MOS eos rece etre Ernie rte ba ER ba vae EEANN ENANAR 28 2 2 Piping work connection considerations sssesseee enne 28 221 Piping matenalS apes 2 G MH 28 2 2 2 Three principles on refrigerant piping wor
281. the rate point This is very useful for installations that run CN1 and CN2 7 24 hours a day C rrentcontrol This signal allows to regulate current consumption and establish an average demand 100 consumption of 100 of the rate point This is very useful for installations that run CN1 and CN2 24 hours a day Output signals Ind Output signal Application Port N setting ri o x application N setting This signal allows to pick up the machine s operation signal This is very useful to start i Operation signal up additional systems such as humidifiers fans and other additional air conditioning CN7 systems D2 Alarm signal This signal picks up the machine s alarm This is very useful to warn that an alarm has CN7 been tripped n3 Compressor ON This single allows to pick up the compressor s operation signal It is very useful for CN7 Ha signal checking signals during remote control operation and for the interlock of the outdoor unit m Defrost operation This signal allows to pick up the defrosting of the unit This is very useful to know how Li A Son BOT CN7 signal the indoor unit is operating if there is an abnormal situation 7 NOTE Do not set same function 01 04 to multiple input port 86 SMGBO0043 rev 1 04 2010 Available optional functions H ITACHI Service Manual Inspire the Next Programming The optional signals are programmed through the PCB of the outdoor uni
282. the refrigerant Recharge the refrigerant m after the vacuum ref cycle quantity 1 pumping Insufficient heating ppm Cloggi f the disch ogging o the discharge Check for clogging Remove the clogging pr piping Check the temp difference at the inlet and the outlet of the 4 way valve Malfunction or internal leakage of the 4 way valve Replace the 4 way valve Check the temp difference at the inlet and Malfunction of the check valve of the outdoor unit theoutlet of the check Replace the check valve valve Check the temp Excessively high suction Malfunction or internal difference at the inlet and Replace the 4 way valve pressure leakage of 4 way valve the outlet of the 4 way valve Check the expansion Replace the failed Discharge temp of the indoor unit is unstable valve of the indoor unitin expansion valve of the the same system indoor unit 1 Refer to chapter 7 of TC 133 SMGB0043 rev 1 04 2010 Troubleshooting HITACHI Inspire the Next Service Manual Abnormal operation of the devices Cont Phenomenon Cause Check item Action Turn OFF the main switch Cooling or heating process with an abnormal sound Foreign particles inside of the fan casing Visually inspect it Remove the foreign particles Indoor unit fan runner is hitting the casing Visually inspect it Adjust the position of the fan runner Outdoor unit fan runner is hitting t
283. the refrigerant piping after collecting all the refrigerant from the check joint Ilf it S possible move the unit to ensure more service space for servicing the compressor Do not deform any piping when you are removing the covers If you deform the piping the welded portion may be broken 1 Revome the piping service cover by removing the three 3 fixing screws Pull up and remove the cover using the handle 2 Open the sound insulation cover wrapped around the compressor and remove the terminal box cover at the compressor fixed by one 1 screw Disconnect the compressor wires in the terminal box 7 NOTE Make sure that the fasten terminals for the compressor are normal Any lack of grip should lead to a change of the old terminals for new ones It is recommended to clamp the fasten terminals to improve the contact Check and take Note of each terminal number and indications for its correct connection at the reasembling process If wires are connected in incorrect order it will lead to a compressor failure 3 Remove the rubber cap and the thermistor on the top of the compressor 4 Remove the two 2 crankcase heaters by releasing the springs A CAUTION Explosion risk Can cause injuries Make sure that there is no positive pressure inside the pipes 231 SMGBO0043 rev 1 04 2010 HITACHI Inspire the Next Sound proof cover Compressor Pipi
284. tightening the screws and the correct wiring Faulty PCB Outdoor unit indoor unit Disconnected wires to PCB Check the connections Correctly connect the wires Faulty PCB Replace PCB if faulty Incorrect wiring Disconnected wire insufficient contacting Check the continuity and the looseness of connection screws Replacing wires repairing and tightening the screws Incorrect wiring Check the terminal Nos Correctly connect the wires 1 PCB1 output voltage Voltage Vcc 12 GND2 12VDC Vcc 05 GND1 5 VDC Vcc 15 GND1 15 VDC Vcc 24 GND1 24 VDC Vcc 12T GND1 12 VDC 144 SMGB0043 rev 1 04 2010 Troubleshooting Service Manual HITACHI Inspire the Next Alarm code Description ri H Abnormal transmission between Inverter PCB and RASC unit PCB1 The RUN LED flickers and ALARM is displayed on the remote control switch The unit number the alarm code and the unit code are alternately displayed on the set temperature section The unit number and the alarm code are displayed on the display of the RASC unit PCB This alarm is displayed when the abnormal operation is maintained for 30 seconds after the normal transmission between the RASC unit PCB1 and inverter PCB Also the abnormal operation is maintained for 30 seconds after the micro computer is automatically reset The alarm is displayed when the abnormal transmission is
285. ting Setting and control 00 Control using the indoor thermistor for the suction air 01 Control using the thermostat of the remote control switch 02 Control using the average value of the indoor thermistor for the suction air and the thermostat of the remote control switch If the thermostat of the remote control switch is not used set at 00 Incorrect input output setting Check setting condition of i1 and i2 by input output setting Setting and ontrol 01 Room thermostat cooling 02 Room thermostat heating In case that room thermostat is not used set for input signal actuallt used If no signal is used set at 00 1 Refer to section 7 3 2 2 Refer to section 7 3 1 3 Even if the remote control switches are normal the compressor does not operate under the following conditions 1 Indoor temp is lower than 21 C or Outdoor temp Is lower than 5 C during the cooling process DB 2 Indoor temp is higher than 27 C DB or Outdoor temp is higher than 15 C WB during the heating process 3 When a cooling or heating process signal is given to the Outdoor unit and a different mode as heating or cooling process signal is given to the indoor units 4 When an emergency stop signal is given to Outdoor unit 128 SMGB0043 rev 1 04 2010 Troubleshooting HITACHI Service Manual Inspire the Next Abnormal operation of the devices Cont Action Phen
286. ting primary and secondary remote 00 Primary controls 00 Secondary Er Minimum setting for cooling temperature 00 Normal temperature margin x 3 01 10 Minimum cooling limit 1 C 10 C E Maximum setting for heating temperature 00 Normal temperature margin xe 4 01 10 Maximum heating limit 1 C 10 C 00 Show ts 4 Hi Maintenance alarm 01 Hide 4 T 00 Show Li He No automatic control indication 01 Hide 00 Operation mode change off hide operation mode factory setting H3 Operation mode change restriction 5 01 Operation mode set by the central control unit FAN mode 02 Unlimited operation n 00 Air conditioning only HH he m fatal heat 01 Ventilation only 9 y 02 Air conditioning ventilation iii Central control available after forced 00 Off im stoppage 01 On 1 Certain indoor units do not accept the setting 02 2 If installed on a bedside table use the setting 00 3 Applies to FAN COOL and DRY modes 4 Applies to HEAT mode 5 01 is only available when using a remote control Do not use this setting when using two remote controls primary secondary 108 SMGBO0043 rev 1 04 2010 Available optional functions Service Manual HITACHI Inspire the Next NOTE When connecting several indoor units the same settings are applied to all units To change the settings wait at least three minutes after switching the power on Some indoor and outdoor unit
287. tion H ITACHI Service Manual Inspire the Next If the piping installation is not completed until the next day or even over a longer period of time braze off the ends of the piping and charge the pipe with oxygen free nitrogen through a Schrader valve type access fitting to prevent moisture and particle contamination entering Do not use insulation material that contents NH3 NH3 can damage the cooper pipe material and can be a source of future leakages Insulation Attach the pipe insulation to each branch using vinyl tape Attach also insulation to field supplied pipes in order to prevent the capacity decrease according to the ambient air conditions and dewing on the low pressure pipe surface 7 NOTE When polyethylene foam is applied it is recommended the usage of a wall thickness of 10 mm for the liquid piping and 15 mm to 20 mm for the gas piping Perform the insulation work after the pipe surface temperature decreases to the room temperature if not the insulation material may melt Ifthe ends of the piping system are open after ending the piping work attach caps or vinyl bags securely to the ends of the piping avoiding moisture and dust entering 2 2 2 Three principles on refrigerant piping work In case of using refrigerant R410A in the refrigeration cycle the refrigeration oil should be of a synthetic type one 30 SMGBO0043 rev 1 04 2010 Piping installation Service Manual HITAC
288. tly on compressor thermistor Clogged strainer X he chec the temp Replace the strainer in the indoor unit clogging at difference at the inlet and inticarunit the low pressure piping the outlet of the strainer Clogging at the low Check the temp Remove the clogging pressure piping difference Check for clogged air filter Clean the air filter Insufficient air flow to the indoor unit heat exchanger A 9 ENEK for aM obStacIS at Remove the obstacles the inlet or the outlet Insufficient speed of the Replace the fan motor Excessively low air temp indoor unit fan motor to the indoor unit heat exchanger Short circuited indoor Remove the cause of the unit air short circuited air 130 SMGB0043 rev 1 04 2010 HITACHI Troubleshooting Inspire the Next Service Manual Abnormal operation of the devices Cont Action Phenomenon Cause Check item Turn OFF the main switch Clogging of the outdoor unit heat exchanger Remove the clogging Obstacles at the inlet or 5 the outlet of the outdoor Remove the obstacles Insufficient air flow to unit heat exchanger the outdoor unit heat h Pxgaanger Is the service area for the Eu Secure the service area outdoor unit sufficient Correct fan speed Replace the fan motor Short circuited air to the Remove the cause of the Excessively high air temp outdoor unit short circuited air to the outdoor unit heat exchanger Any oth
289. to set temperature by remote controller SW 106 SMGBO0043 rev 1 04 2010 Available optional functions H ITACHI Service Manual Inspire the Next Heating temperature range limit F This function is used to set the the temperature range in heating mode This function allows reducing the Heating range to configurate trough the remote control switch The setting condition is showing below Setting condition Contents of parts 00 Not available Working range is reduced in 1 C decreased 01 imit in 1 the upper limit in 1 C Available 10 Working range is reduced in 10 C decreased the upper limit in 10 C Example 19 C 30 C l 19 30 C l Temp range at heating standard 19 29 C BL Min at heating 1 C lt _ lt lq M l ON 19 20 cl 10 C in at heating rep ek ee es Se ee gt possible to set temperature by remote controller SW impossible to set temperature by remote controller SW Heating automatic temperature range limit F 5 This function is used to avoid anti froze water pipe protection The unit will be activated from setting temperature until 19 C The setting condition is showing below Setting condition Contents of parts 00 Not available 01 Setting temperature 5 C 02 Available Setting temperature 10 C 03 Setting temperature 15 C 107 SMGB0043 rev 1 04 2010 Available optional H ITACHI functions Inspire the Next Servic
290. tor protection activation ng Alarm H Electronic thermal activation B3 Freeze protection overheating protection a Inverter voltage decrease nmi Instantaneous power failure at outdoor ue Lt ot m unit E Over voltage Er HA Instantaneous power failure at indoor unit m Abnormal transmission Stoppage of cooling operation due to low H Abnormal current detection nn outdoor air temperature adii Stoppage of heating operation due to Hn Instantaneous power failure detection high outdoor air temperature 4 Reset of micro computer for inverter Ut Demand thermo OFF i Earth fault detection from compressor a Retry for Pd increase prevention 3 Open phase detection 5 Vacuum discharge gas temperature increase retry iH Inverter malfunction Retry due to discharge gas SUPERHEAT lt DON decrease a mr Inverter malfunction IPM error retry instantaneous over Inverter malfunction current of inverter retry electronic thermal activation of inverter retry abnormal current sensor of inverter retry lt TM rn 4 al Transmission error Li Abnormal current detection Retry due to inverter voltage decrease Retry due to Inverter Overvoltage ni x n Li Abnormal protective device m Li Other retry m me Different operation mode between indoor O NOTE og outdoor units Only for individual twin triple quad types 7
291. tronic expansion valve 19 Strainer 9 Solenoid valve 20 Electronic expansion valve 10 Check joint 21 Distributor 11 Stop valve for liquid line 43 SMGB0043 rev 1 04 2010 Piping installation H ITACHI Service Manual Inspire the Next 2 5 4 Refrigerant piping selection Select the piping connection sizes according to the following procedures Between outdoor unit and branch pipe Select the same pipe connection size as the pipe size of the Outdoor unit Between branch pipe and indoor unit Select the same pipe connection size as the pipe size of the indoor unit Gas piping Liquid Distributor size piping size Twin Quad RASC 3HVRNE 15 88 5 8 9 53 3 8 TE 03N RASC 5HVRNE 15 88 5 8 9 53 3 8 TE 56N RASC 10HRNE 25 4 1 12 7 1 2 TE 10N QE 810N Unit For RASC 10HRNE units use a reducer pipe in the following installations Pipe Installation m type Distributor Type Dimensions Sinale Gas 25 4 1 22 2 7 8 9 Liquid 12 7 1 2 9 53 3 8 Twin TE 56N Liquid 9 53 3 8 6 35 1 4 Quad QE 810N Liquid 12 7 1 2 9 53 3 8 Piping size for indoor unit The piping size for indoor unit are as follows Pipe Installation S Reduer X 9 v type Distributor Type zm Tm mm in mmy in Qa b Gas 25 4 17 22 2 7 8 Si
292. tronic expansion valve of outdoor units is are opened to return the liquid refrigerant to the compressor through the accumulator decreasing compressor temperature If the compressor upper part temperature increases exceeding 132 C even if an electronic expansion valve opens the compressor is stopped in order to protect the compressor Resistance value of 200 200 R25 200kQ B 3920k e 100 S p E D 14 2 5 3 0 25 30 100 132 150 Temperature C Resistance characteristics of thermistor for discharge gas overheating protection In cooling operation the above function is also available d If compressor upper part temperature increases excessively the protection control is activated and the compressor is stopped according to the following method Operation Upper part temperature of compressor Defecting period Cooling Over 132 C 10 minutes continuously Over 140 C 5 seconds continuously Heating Over 132 C 10 minutes continuously Over 140 C 5 seconds continuously Defrosting Over 132 C 5 seconds continuously Thermistor for outdoor ambient temperature The thermistor resistance characteristics are shown in the figure below Thermistor for evaporating temperature of outdoor unit in heating operation for defrosting The characteristics for the thermistor is the same with the value of outdoor ambient temperature thermistor as shown i
293. ture indication b Press the DAY V switch or the SCHEDULE A switch Then the port indication at the segments for time indication of the timer setting changes as shown below Select the port for allocating the input signal and the output signal When pressing SCHEDULE A switch When pressing DAY v switch c Press the OK switch Then the input signal code and the output signal code at the segments for the setting temperature indication changes as shown below Select the input signal and the output signal that you need to allocate to the port When pressing the OK Switch na nia LL ee Lc mo r3 Return to normal mode from the optional functions setting mode Press the RESET switch to memorize the optional functions settings and return to normal mode e Selection of other indoor unit When in optional settings mode press the TEMP switch or the TEMP switch the condition of the remote control switch is changed so that the Indoor Unit can be selected to set the optional function described above 96 SMGBO0043 rev 1 04 2010 Available optional functions Service Manual Setting items of the optional functions HITACHI Inspire the Next Legend 3 Individual 1 nr cre t i uv Not individual Not used O NOTE Individual This function can be selected individually for each indoor unit controlled by
294. upply E PCB1 Faulty PCB1 or GND of PCB1 5V 5 gt Replace PCB1 or correctly transformer Is the voltage between Vcc12 and transformer GND of PCB1 12V 10 Remove CN201 on PCB2 isisiendie essa Is the voltage between CN201 3 Mos io i e to Yes and GND1 more than 1V fan motor correctly Faulty fan motor gt Replace fan motor Is there voltage between GND of PCB1 and PC1 2 of PCB2 EPA pope Faulty PCB2 Replace PCB2 PCN202 m PC1 2 PC Faulty PCB1 rt Ls dj LED CN200 CN202 CN201 3 PCB2 Yes Replace PCB1 PCN203 CN202 CN201 LED4 PCB1 CM19 Transformer 156 SMGB0043 rev 1 04 2010 Troubleshooting Service Manual HITACHI Inspire the Next Alarm code Description 7 Activation of the protection device for the indoor fan motor RPK The RUN LED flickers and ALARM is displayed on the remote control switch The unit number the alarm code and the unit code are alternately displayed on the set temperature section The unit number and the alarm code are displayed on the display of the outdoor unit PCB1 This alarm code is displayed when the following conditions occurs three times in 30 minutes Indoor fan rotates less than 70rpm for 5 seconds during operation Set air flow volume Hi before starting this check Does t
295. ure Te C 8 Check the pressure Discharge pressure Pd kg cm G Suction pressure Ps kg cm G 9 Check the voltage Rated voltage V Operating voltage L1 L2 V L1 L3 V L2 L3 V Starting voltage V V Phase imbalance 1 Vm 10 Check the compressor input running current Input kW Running current A 11 Is the refrigerant charge adequate 12 Do the operation control devices operate correctly 13 14 15 Do the safety devices operate correctly Has the unit been checked for refrigerant leakage Is the unit clean inside and outside 16 Are all the cabinet panels fixed 17 Are all the cabinet panels free from rattles 18 19 Is the filter clean Is the heat exchanger clean 20 Are the stop valves open 21 Does the drain water flow smoothly from the drain pipe 120 SMGBO0043 rev 1 04 2010 Test run HITACHI Service Manual Inspire the Next Checklist on compressor CLIENT MODEL DATE Serial No Production date Checker No Check item Check method Result Remarks Is THM9 correctly connected THMS Discharge gas thermistor 1 Is wire of thermistor correctly connected by viewing 2 Check to ensure the 7 segment indication of Td when comp is operating Td Temperature of THM9 Is thermistor THM9 1 Check to ensure that thermistor on the top of comp is correctly mounted by viewing 2 2 Check to ensure that actually measured disconn
296. ure frequency indication 20 Discharge pressure Li od 1 high x 0 1 MPa 4 Y UL 21 Suction pressure low E roe x 0 01 MPa FUZ L l RUN al ad al 22 Control information 23 Operation frequency ewe Ltx Hz 1 Y to Indoor unit capacity indication 24 Indoor unit capacity 1 H H ti H 25 Outdoor unit code J Tul Fry ji 26 Refrigerant cycle yvi l number Lt LU 27 Refrigerant cycle ue ror number LU Lt Lt Expansion opening indication 28 Indoor unit expansion valve opening Im I LL Outdoor unit EE a 29 expansion valve l cz H H 7 MV1 opening 96 Z 7 Outdoor unit T 30 expansion valve 4 H H MV2 opening 96 cam Z7 Outdoor unit e 31 expansion valve H i i1 f MVB opening 96 Estimated electric current indication 32 Compressor running I t TIT current A J I L er Returns to temperature indication 179 SMGBO0043 rev 1 04 2010 HITACHI Inspire the Next This is an indication for internal information for the remote control switch This does not have any specific meaning The total frequency is displayed when several compressors are running This
297. urrent data will be displayed Check mode Check mode 2 The data which was held immediately before the failure will be displayed Pres OK for more than 3 seconds The indication will delay as the transmission between the remote control switch and the indoor unit takes about ten seconds All the data may be displayed as FF or i or 255 Normal mode These transient data which are produced temporarily by the software do not affect the device functions at all The alarm code may also be displayed as F F HIGH s ER The alarm code that identifies the last fault that has occurred in Unit number n ggi rn 2 the displayed unit and alarm code The unit number of the connected unit or the unit number for AIC displayed us which the checking mode was selected previously ADDS Number of the indoor unit in no cycle After n F e RN No refrigerant cycle ithin seven seconds to chec 2 i another unit Forward Press the switch to increase from 00 to 01 to 02 Backward coo ow Press the O switch to decrease from 15 to 14 to 13 Check mode 1 pt m Dex hw Press amp to see the previous indication Press to see the next indication HIGH e iss F4 COOL nn E 1 HROS ATC CHECK Pres OK for more than 3 seconds y Press to see the next data
298. utdoor unit and immediately afterwards the function selection mode is set to OFF The memorized data is maintained even when the power supply wires are disconnected 5 89 SMGB0043 rev 1 04 2010 HITACHI Inspire the Next 0 r9 Fixing of demand rm r1 function Lt LL pl PSW1 SET PSW2 PSW3 Wave function nme r1 setting Li LL Li PSW1 SET PSW3 SET Indoor temperature rm r1 setting for energy mad saving bn I pt PSW1 SET PSW2 PSW3 Slo defrost setting r1 LUI bt PSW2 PSW1 PSW3 L Low noise settings C D PSW2 PSW1 PSW3 Lh S 90 SMGB0043 rev 1 04 2010 Not available Available Not available Available Not available Available Not available Available Not available Available 2 r0 Available optional functions Service Manual Night shift rm r1 Not available yell Lt PSW1 SET PSW2 PSW3 Available Defrost condition 1 Not available pt it Lt PSW1 SET PSW2 PSW3 Available SEG2 SEG1 Fixing of frequency LI ad r1 Not available JUL Lt PSW1 SET PSW2 PSW3 Available Cold draf
299. ution in case of refrigerant leakage ssssssseeeeenne nemen nnns 258 11 7 1 Maximum permitted concentration of HFOs sssesssseeeeeeeneenee enne enne 258 11 7 2 Calculation of refrigerant concentration sss ennt nennen nnne inneren nns 259 11 7 3 Countermeasure for refrigerant leakage ssssseeeeene enne 259 11 8 Maintenance WOrK iiic dinde t dde AANE ER Ld d ER Ld Ld d 260 11 9 Service and maintenance record sesssssssssesses EEEE enne enne 261 11 10 Service and maintenance record using the 7 segment display sseesse 262 11 11 Service and maintenance record by remote control switch seee 263 11 12 Pump down method for replacing the compressor sssssssss eem 264 255 SMGBO0043 rev 1 04 2010 HITACHI Inspire the Next 11 HITACHI Inspire the Next WAL Field work instruction Service Manual Checking the power source and the wiring connection Check the following items in the case of abnormal operation No Check item Procedure fuse cut out 2 Is the secondary 1 Is the breaker of the power source on the transformer correct Check the secondary voltage of the breaker and the fuse by means of a tester Disconnect the sedcondary side of the transformer and check the voltage by means of a tester Indoor unit transfo
300. vailable ports The system has the following input and output ports Setting of the port Content in the PCB of the Remarks Outlet indoor unit 1 d 1 2 of CN1 B Contact 1 ie 2 3 of CN1 i Contact 1 2 of CN2 B 97 Contact 3 alai 1 2 of CN7 R DC 12V 5 3 lo 2 3 1fo O lag 1 3 of CN7 zo 1 De12V Connection The system has the following connections Input connections Output connections Indication Connections Indication Connections 12 ssi Lt 12 CN1 500 Vo 230 V CNT S55 m X1 Zl l 12 5 X1 2m x3 a I et th 23 S81 J LL 13 CN1 600 Vo 230 V ON oa n X1 ZN 23 me e 1 S 1 3 x1 LR dpi 7 xs ft 12 SS1 CN2 600 Vo 230 V y X1 12 X1 84 SMGB0043 rev 1 04 2010 Available optional functions H ITACHI Service Manual Inspire the Next Specification of the components for a correct installation Component Manufacturer or specifications Remarks OMRON mini power relay model MY1F or Voltage bet
301. vent contamination of the refrigerant with water or foreign particles do not expose open to atmosphere for long periods f necessary seal pipe ends using caps or tape 1 Remove the three 3 fixing screws 2 Slide the service cover upward Then pull up and remove it using the handle Screws 3 Pay attention while handling the cover and do not fall it off 9 2 2 Removing fan service cover 1 Remove the three 3 fixing screws 2 Slide the service cover upward Then pull up and remove it using the handle Screws 3 Pay attention while handling the cover and do not fall it off 9 2 3 Removing electrical box service Screws cover 1 Remove the three 3 fixing screws L 2 Slide the service cover upward Then pull up and remove it using the handle 3 Pay attention while handling the cover and do not fall it off 228 SMGB0043 rev 1 04 2010 Servicing Service Manual 9 2 4 Removing the outdoor unit fan motor A DANGER Electrical hazard Risk of death Check that the LED201 red located on the DIP IPM is OFF Do not touch the electrical components when LED201 Red is ON in order to avoid an electrical shock Do not touch the electrical components of the PCB directly 7 NOTE Pay special attention to the edges of the plates when removing the screws Always wear gloves when performing mechanical works 1 Remove the fa
302. vercurrent protection value an abnormality is detected b Function When abnormalities are detected the inverter compressor is stopped and the signal code of stoppage cause is transmitted to PCB1 c Cancellation of protection function Transmission for signal code of stoppage cause is canceled when a stopping order is issued or main power source is cut off 10 1 4 Overload control a Level of detection When the output current exceeds 105 of the maximum output current an abnormality is detected b Function An overload signal is issued when output current exceeds 105 of the maximum output current and the frequency decreases For 10 seconds after the output current decreases lower than 88 of the rated current the operation is performed with the compressor frequency limited to the upper level frequency when the output current decreases lower than 88 of the rated one However if the frequency order is smaller than the maximum value the operation is performed according to the order c Cancellation of protection function After the operation described in the above item b is performed for 10 seconds this control is canceled 244 SMGBO0043 rev 1 04 2010 Main parts
303. ween relay terminals 12 Vdc 75 mA equivalent Auxiliary relay X3 Voltage between terminals of the 230V 5 mA SS1 x1 x2 contact example Manual type contactor Optional part PCC 1A capable of connecting the JST XHP 3 connector Wire control Voltage 12V DC 0 5 mm Wire power Voltage 230V 2 0 mm 3P connector cable Five wires with connectors as one set 7 NOTE The connection of the input signal is only an example Keep the CN1 and CN2 wires as short as possible Do not run the wires along 230 V 400 V CA power cables separately install them at a distance of more than 30cm The cables may intersect If you install the wires along a power supply wire insert the wires in a metal conduit tube and ground one end of the tube The maximum wiring length is 70 m If you use this function it is recommended that you use safety devices such as an electrical leakage breaker or a smoke detector 85 SMGBO0043 rev 1 04 2010 Available optional H ITACHI functions Inspire the Next Service Manual 5 1 2 Configuration Available optional signals H V RNE units have the following signals that are described in the following table These signals are set up through the PCB of the outdoor unit Input signals Ind Input signal Application Port N setting ri o x application N setting Th
304. y Check the smooth flow by pouring some water Good Not good 13 Check for a leakage in the compressor Check for any leakage Good Not good 14 Check for a leakage in the outdoor heat ditto Good Not good exchanger 15 Check for a leakage in the indoor heat ditto Good Not good exchanger 16 Check for a leakage in the 4 way valve ditto Good Not good 17 Check for a leakage in the check valve ditto Good Not good 18 Check for a leakage in the accumulator ditto Good Not good 19 Check for a leakage in the strainer ditto Good Not good 20 Check for a leakage in the electronic expansion ditto Good Not good valve 21 Check for a leakage in the piping ditto Good Not good 22 Check the direction of the fans By viewing the airflow volume Good Not good 23 Voltage among each phase Higher than AC220V Good Not good 24 Vibration and sound Check the fan the compressor the piping and Good Not good others 25 Activation of each operation mode Check the activation of the COOL switch the Good Not good HEAT switch the STOP switch and the TEMP Switch 26 High pressure cut out switch Check the actual activation value Good Not good 27 Check the activation of the drain up mechanism Check the activation during the cooling process Good Not good 28 Air inlet temperature of the indoor unit DB WB C DB C WB 29 Air outlet temperature of the indoor unit DB WB C DB C WB 30 Air inlet temperature of the outdoor unit DB WB C DB C WB
305. y displayed on the set temperature section The unit number and the alarm code are displayed on the display of the RASC unit PCB IPM or Dip IPM and PCB2 have detecting function of abnormality This alarm is indicated when the transistor module detect the abnormality 7 times in 30 minutes including 7 Retry operation is performed up to the occurrence of 6 times Abnormal current to the transistor module such as Abnormal temperature of the IPM or Dip IPMand PCB2 Turn off power disconnect No U V W from compressor Check the compressor If there is a short circuit terminals and restart Does the protecting function activate 3 Yes Faulty Check the IPM or Dip IPM 1 2 Good Is the silicon grease coated all over between the IPM or Dip IPM and the radiated fin between phase lines replace the compressor Good Faulty Check the PCB2 Replace IPM or Dip IPM Replace IPM and PCB2 No Coat the silicon grease to all the touched face between the IPM and the radiated fin fully 4 Yes Is the heat exchanger ET Yes gt of outdoor unit incu d Remove clogging No gt Replace the PCB2 1 Perform the high voltage discharge work by referring to the item 7 3 4 before checking and replacing the inverter components 2 Regarding replacing or checking method for inverter components refer to the it
306. y heated 14 In the case it will result in motor burning or compressor seizure 200 SMGB0043 rev 1 04 2010 Spare Parts HITACHI Service Manual Inspire the Next 8 Spare Parts Bu Opare DAMS EET 201 8 1 RASC 3 5 HVRNE c ccccccce cece eee eee cece eeaeeaeceeee eee taaaaaaaaeaneeeceeeeeeedsaaaaaeaaeaeeeseeseeeeeeeeeseessenaeees 202 EE S Sa I hECLU 202 8 1 2 Refrigerant Cycle unie pL r E EE peo EAR P Der ke AT o dS Pe Roe cR NA DERIE 204 8 1 3 EBlectrical equipameht irre e PERIERE IRURE ER beider Ea areira iraa ie 206 82 Ciel c rE 208 pu EE S IIERPAI REE DL T 208 8 2 2 cudeus c 210 8 2 3 Electrical equipment 201 SMGBO0043 rev 1 04 2010 HITACHI canes Inspire the Next Service Manual 8 1 RASC 3 5 HVRNE 8 1 1 Cabinet and Fan Drawing N EPN200809 202 SMGB0043
307. yed on the display of the Outdoor unit PCB This alarm code is displayed when the thermistor is short circuited less than 0 24 kQ or cut greater than 840 kQ during the cooling process or the heating process The system is automatically restarted when the fault Is THM5 connected to intake No of PCB Connect it Yes Is the resistance of THM3 En between 0 24kQ and 840kQ a Faulty thermistor Heat exchanger gas Refer to the thermistor pipe thermistor THM3 resistance in alarm 11 In case of 4 way cassette Faulty PCB Action Phenomenon Cause Check item Turn OFF the main switch Fault Check the resistance Replace the thermistor if faulty Faulty gas piping thermistor Incorrect connection Check the connection Repair the wiring and connections Replace PCB and Faulty PCB check the operation Replace PCB if faulty 154 SMGB0043 rev 1 04 2010 Troubleshooting Service Manual HITACHI Inspire the Next Alarm code Description 7 Activation of the protection device for the indoor fan motor except RCI RCIM and RPK The RUN LED flickers and ALARM is displayed on the remote control switch The unit number the alarm code and the unit code are alternately displayed on the set temperature section The unit number and the alarm code are displayed on the display of the Outdoor unit PCB This alarm code is displayed when the temp

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