Home

Part 2 of 2 - MHG Heating

1. 25 50 75 100 120 Temperature C OCH533A 42 MEM NN Linear expansion valve 1 Operation summary of the linear expansion valve Linear expansion valve opens closes through stepping motor after receiving the pulse signal from the outdoor controller board Valve position can be changed in proportion to the number of pulse signal Connection between the outdoor controller board and the linear expansion valve Outdoor controller board DC12V EEY Gray 1 rece Q d BEEN 4 Orange zd T NE NU 3 i 1 5 pes Be Q 1 Black 5 AE S 5 i ye Y Uh ep Connector LEV A AVAYAY A LEV B Output pulse signal and the valve operation Output DS Opening a valve 8 gt 7565554535218 Closing a valve 1525354555657 8 1 axe When linear expansion valve operation stops all output phase become OFF 2 Linear expansion valve operation When the switch is turned on 700 pulse closing valve signal will be sent till it goes to amp point in order to define the valve position gt pe The pulse signal is being sent for about 20 seconds O Q When the valve moves smoothly there is no sound or vibration 2 I occurring from the linear expansion valve however when the 6 pulse number moves from to or when the valve is locked E more sound can be heard S i No sound is heard when the pulse numb
2. OCS T SQ u BW 7 d P SW H3 L 1134 3SION NIMOL 93N k c Lap GD1 Connect to the earth LH INO GD3 Connect to the earth CNAC2 AC230V Connect to the outdoor controller circuit board CNAC a LAO GAO EAD PAO L L Li 1 ELE Pape AOT L07 CNDC DEREN seas J Connect to the 7 outdoor controller PINK circuit board CNDC ns CNCT Primary current Connect to the out gon ASUN Ex door power circuit SE behoed Ri board CN5 CNL FHI FH2 Connect to the ACLA NO LO1 LO2 LO3 Connect to the POWER SUPPLY outdoor converter LO1 LO2 LO2 LO3 LO3 LO1 AC400V OUTPUT circuit board N IN Connect to the outdoor converter circuit board and ACL L1 IN ACL2 ACL3 OCH533A 4T MM M Outdoor power circuit board Brief Check of DIP IPM and DIP PFC PUHZ SW75VHA UK Usually they are in a state of being short circuited if they are broken PUHZ SW75VHA BS UK Measure the resistance in the following points connectors etc If they are short circuited it means that they are broken 1 Check of DIP IPM 2 Check of DIP PFC Note The marks L N N1 IN2 P1 P2 U LV and W shown in the diagram are not actually printed on the board R S U V W Connect to the ACL Connect to the compressor MC 230V AC Voltage among phases 5V to 180V AC LD1 LD2 280 380V DC Connect to Connect to ear the earth
3. 00 is displayed in case of no postponement display Postponement code display Blinking During postponement Lighting Cancellation of postponement Code 00 is displayed in case of no postponement display When no error history 0 and are displayed by turns Code display 3 Outdoor pipe temperature Liquid TH3 4 Discharge thermistor TH4 6 2 phase pipe TH6 7 Ambient temperature TH7 Code 8 Outdoor heatsink TH8 display 34 Comp surface thermistor TH34 0 255 When it is 100Hz or more hundreds digit tens digit and ones digit are displayed by turns Example When 125Hz 0 5 secs O 5secs 2 secs 1 gt 25 sep pec EMI Hz The black square lil indicates a switch position SW2 setting Display detail Explanation for display N N LEV A opening pulse on error occurring 0 480 When it is 100 pulse or more hundreds digit tens O digit and ones digit are displayed by turns Example When 130 pulse 123456 0 5 secs 0 5secs 2 secs 1 gt 30 LIL Pe ee Indoor room temperature TH1 on error occurring ON 8 39 123456 Indoor pipe temperature Liquid TH2 39 88 on error occurring When the temperature is 0 C or less and O 39 88 temperature are displayed by turns Example When 15 C 123456 0 5 secs O 5secs 2 secs QE gt 15 gt U feel Pressure saturation temperature Tesus 39 88 on error occurring When the temperature is 0 C
4. CWPKW a CED LTD Of s pol i ORI TRL TAB connector on X52CA Connect to the RS resistor TB L1 TB L2 TB L3 CN4 Connect to the Detection of primary Connect to the Connect to the outdoor outdoor controller current Connect to outdoor converter converter circuit board the outdoor noise filter circuit board CN7 L1 OU L2 OU L3 OU circuit board CN4 circuit board CNCT 400V AC CN2 CN6 Connect to the outdoor controller circuit board CN2 Thermistor D Power circuit board Transmitting Heat sink TH8 signal to the controller board 0 5V DC 2 9 Zero cross signal 0 5V DC Not used 16V DC 16V DC 0 9 0 0 6 0 8 OCH533A 50 MEM Outdoor converter circuit board PUHZ SW100YHA UK PUHZ SW100YHA BS UK PUHZ SW120YHA UK PUHZ SW120YHA BS UK CK OU L1 IN N IN L1 A1 Connect to the CK capacitor Connect to the noise filter Connect to the ACL1 circuit board LO1 No T n N IM ma L 1 IN L1 A1 9 8 cT cos M j See00 2e e jo 0 P200 PCI T un TEC ge ee gis 82 e SLL o 4 9906 o 946 amp rloo d E 1C120 E 88 Jerse z o i _ o EE 9 59 go go ooog o Ps E i oE EU o d 4 o L oo o MA o o ocra e O 3 ols a E ci Ps a CIi00 a Ol e 5 E a E Jo o a o B 3 e a CJ e 7 eo aD 586860 e c C ewor3 o Oooooo CN9 ui CEDE o rw gs Ca c e o o o eo
5. ON OCH533A 53 MM NM Display function of inspection for outdoor unit The blinking patterns of both LED1 green and LED2 red indicate the types of abnormality when it occurs Types of abnor mality can be indicated in details by connecting an optional part A Control Service Tool PAC SK52ST to connector CNM on outdoor controller board Display 1 Normal condition l Pa Outdoor controller board A Control Service Tool Unit condition EM l LED1 Green LED2 Red Indication of the Indication of the display When the power is turned on the power is turned on Lighted Lighted Alternately blinking display blinking display When unit stops Lighted Not lighted Operation mode When compressor is warming up Lighted Not lighted When unit operates Lighted Lighted C5 H7 etc 2 Abnormal condition Indication Error s controller board Error l Contents Inspection method 1 2 blinking Connector 63L is open Check if connector 63H or 63L on the outdoor controller Connector 63H is open board is not disconnected Check continuity of pressure switch 63H or 63L by tester inki inki Ag of I F or FTC or outdoor unit TEE 2 blinking 1 blinking nena wie KO No pumbe af Check if I F or FTC or outdoor connecting wire is connected indoor units 4 units or more correctly Miswiring of iE 7 FTC or outdoor unit adl Check if 4 or more I F or FTC units are connected to connecting wire converse wiring or ou
6. 5 x 12 and remove the back cover panel 5 Remove the electrical parts box See Photo 3 6 Remove 3 valve bed fixing screws 4 x 10 and 4 ball valve Compressor and stop valve fixing screws 5 x 16 then remove the valve fixing nut bed 7 Remove 3 right side panel fixing screws 5 x 12 in the rear of the unit then remove the right side panel 8 Recover refrigerant 9 Remove 4 welded pipes of power receiver inlet and outlet 10 Remove 2 receiver leg fixing screws 4 x 10 Separator fixing screw Note Recover refrigerant without spreading it in the air OCH533A 13 MEM MN PUHZ SW100YHA UK PUHZ SW100YHA BS UK PUHZ SW120YHA UK PUHZ SW120YHA BS UK OPERATING PROCEDURE PHOTOS amp ILLUSTRATION 1 Removing the service panel and top panel Top panel 1 Remove 3 service panel fixing screws 5 x 12 and slide Top panel fixing screws pr service panel fixing screws the hook on the right downward to remove the service NR an D panel DWA b 2 Remove screws 3 for front 3 for rear 5 x 12 of the top ino iube panel and remove it Screws 4 Service panel Fan grille Grille fixing fi 1 Screws Service panel fixing screws 2 Removing the fan motor MF1 MF2 1 Remove the service panel See Photo 1 2 Remove the top panel See Photo 1 3 Remove 5 fan grille fixing screws 5 x 12 to detach the fan grille See Photo 1 4 Remove a nut for right handed sc
7. In case of replacing thermistor Ambient TH7 replace it together with thermistor 2 phase pipe TH6 since they are combined together Refer to No 4 above to remove thermistor 2 phase Sensor holder pipe Removing the thermistor Liquid TH3 and thermistor Photo 6 Discharge TH4 thermistor Comp surface TH34 o 1 Remove the service panel See Photo 1 Liquid thermistor 2 Disconnect the connectors TH3 white and TH4 white TH34 red on the controller circuit board in the electrical parts box 3 Loosen the clamp for the lead wire in the rear of the elec trical parts box See Photo 4 4 Pull out the thermistor lt Liquid gt TH3 and thermistor lt Discharge gt TH4 from the sensor holder Removing the thermistor lt Comp surface TH34 5b Remove the compressor cover upper and pull out the thermistor Comp surface TH34 from the holder of the compressor Comp surface Comp surface Dischage thermistor TH34 thermistor TH4 OCH533A 66 OPERATING PROCEDURE PHOTOS 7 Removing the 4 way valve coil 2184 LEV coil LEV A LEV B 1 Remove the service panel See Photo 1 2 Remove the top panel See Photo 1 3 Remove the electrical parts box See Photo 3 Removing the 4 way valve coil 4 Remove 4 way valve coil fixing screw M5 x 6 5 Remove the 4 way valve coil by sliding the coil toward you 6 Disconnect the connector 2184 green on the controller
8. N Overvoltage error 01 123456 Undervoltage error 02 Input current sensor error L phase open error Code Abnormal power synchronous signal 3 PFC error SW75VHA display Overvoltage Undervoltage Overcurrent PFC IGBT error SW VHA Undervoltage Display examples for multiple errors Overvoltage 01 Undervoltage 02 03 Undervoltage 02 Power sync signal error 08 0A L phase open error 04 PFC error 10 14 OCH533A 60 O l O O The black square lll indicates a switch position SW2 setting Display detail Explanation for display ON i 123456 ON k 123456 ON 123456 ON 123456 ON 123456 123456 ON 123456 OCH533A DC bus voltage 180 370 SW75 100 120V 300 750 SW100 120Y Error postponement code history 2 of outdoor unit Error postponement code history 3 of outdoor unit Error code history 3 Oldest Alternate display of abnormal unit number and code Error thermistor display When there is no error thermistor is displayed Operation frequency on error occurring 0 255 Fan step on error occurring 0 10 61 180 370 8W75 100 120V 300 750 SW100 120Y When it is 100V or more hundreds digit tens digit and ones digit are displayed by turns V Postponement code display Blinking During postponement Lighting Cancellation of postponement Code
9. Remove the LEV See Photo 7 6 Recover refrigerant 7 Remove the welded part of LEV 10 Removing the high pressure switch 63H 1 Remove the service panel See Photo 1 Recover refrigerant without spreading it in 2 Remove the top panel See Photo 1 the air 3 Remove 3 right side panel fixing screws 5 x 12 in the The welded part can be removed easily by rear of the unit and remove the right side panel removing the right side panel 4 Pull out the lead wire of high pressure switch When installing the 4 way valve and LEV 5 Recover refrigerant cover it with a wet cloth to prevent it from 6 Remove the welded part of high pressure switch heating 120 C or more then braze the pipes so that the inside of pipes are not oxidized When installing the high pressure switch cover it with a wet cloth to prevent it from heating 100 C or more then braze the pipes so that the inside of pipes are not oxidized OCH533A 72 OPERATING PROCEDURE PHOTOS 11 Removing the reactor DCL and capacitor CE 1 Remove the service panel See Photo 1 2 Remove the top panel See Photo 1 3 Remove the electrical parts box See Photo 3 Removing the reactor 4 Remove 4 reactor fixing screws 4 x 10 and remove the reactor Removing the capacitor 4 Remove 2 capacitor band fixing screws 4 x 10 and remove the capacitor Reactor The reactor and capacitor is attached to the rear of the fixing electrical parts
10. TOKYO BLDG 2 7 3 MARUNOUCHI CHIYODA KU TOKYO 100 8310 JAPAN Copyright 2012 MITSUBISHI ELECTRIC CORPORATION Distributed in Oct 2012 No OCH533 REVISED EDITION A New publication effective Oct 2012 Distributed in Sep 2012 No OCH533 Specifications are subject to change without notice Made in Japan
11. 1 2 Remove the top panel See Photo 1 3 Disconnect the connector TH7 6 red on the controller circuit board in the electrical parts box 4 Loosen the 2 wire clamps on top of the electrical parts box See Photo 5 5 Pull out the thermistor Ambient TH7 from the sensor holder Lead wire of thermistor Ambient TH7 Note In case of replacing thermistor Ambient TH7 replace it together with thermistor 2 phase pipe TH6 since they are combined together Sensor holder Refer to No 5 above to remove thermistor 2 phase pipe 7 Removing the thermistor Liquid TH3 thermistor Discharge TH4 and Thermistor Liquid TH3 thermistor Comp surface TH34 1 Remove the service panel See Photo 1 2 Disconnect the connectors TH3 white and TH4 white TH34 red on the controller circuit board in the electrical parts box 3 Loosen the clamp for the lead wire in the rear of the electrical parts box See Photo 5 4 Pull out the thermistor Liquid TH3 and thermistor Discharge TH4 from the sensor holder Removing the thermistor lt Comp surface TH34 5 Remove the sound proof cover upper for compressor 6 Pull out the thermistor Comp surface TH34 from the holder of the compressor shell Thermistor Motor for compressor Thermistor Comp surface MC Discharge TH34 TH4 OCH533A 16 OPERATING PROCEDURE PHOTOS 8 Removing the 4 way va
12. 1 Indoor unit 2 1 P8 Abnormality of indoor units Indoor unit 3 A0 A7 Communication error of M NET system Indoor outdoor communication error Signal receiving error Outdoor unit Indoor outdoor communication error Transmitting error Outdoor unit EA Miswiring of indoor outdoor unit connecting wire excessive number of indoor units 4 units or more iswiring of indoor outdoor unit connecting wire converse wiring or disconnection OCH533A 56 Pipe temperature Liquid TH3 40 90 Discharge temperature TH4 3 217 Output step of outdoor FAN 0 10 The number of ON OFF times of com pressor 0 9999 Compressor integrating operation times 0 9999 Compressor operating current 0 50 Compressor operating frequency 0 255 LEV A opening pulse 0 480 Error postponement code history 1 of outdoor unit Operation mode on error occurring The black square lil indicates a switch position 40 90 When the coil thermistor detects OC or below and temperature are displayed by turns Example When 10C 0 5secs 0 5secs 10 11 5 Ep 3 217 When the discharge thermistor detects 100 C or more hundreds digit tens digit and ones digit are displayed by turns Example When 105C 0 5 secs 0 5secs 1 05 EE 0 9999 When the number of times is 100 or more hundreds digit tens digit and ones digit are displayed by turns Example When 4250
13. 17 T 30 C Pressure saturation temperature Tesus 39 88 39 88 When the temperature is OC or less and temperature are displayed by turns C Ambient temperature TH7 39 88 39 88 When the temperature is OC or less and temperature are displayed by turns Outdoor heatsink temperature TH8 40 200 40 200 When the temperature is OC or less and temperature are displayed by turns When the thermistor detects 100 C or more C hundreds digit tens digit and ones digit are displayed by turns Discharge superheat SHd 0 255 0 255 When the temperature is 100 C or more hundreds digit tens digit and ones digit are displayed by Cooling TH4 Tesus turns Heating TH4 Tesus Sub cool SC 0 FFFE in hexadecimal notation 0 130 When more than FF in hex 255 in decimal the number is displayed in order of 16 s and 16 s and Cooling Tesus TH3 16 s and 16 s places Jede Heating Tesus TH2 Example When 5000 cycles d O Z zx N ise A C1 O 0 5 secs 0 5 secs 2 secs 9 C4 LIL pu o vj Input current of outdoor unit 0 500 K When it is 100 or more hundreds digit tens digit and ones digit are displayed by turns 0 1 A 123456 Y LEV B opening pulse 0 480 When it is 100 pulse or more hundreds digit tens Pulse digit and ones digit are displayed by turns 123456 U9 error detail history latest
14. 6 Remove an electrical parts box fixing screw 4 x 10 and detach the electrical parts box by pulling it upward The electrical parts box is fixed with 2 hooks on the left and 1 hook on the right Electrical parts box Terminal block Controller circuit Electrical parts TB1 board C B box fixing screws OCH533A 65 OPERATING PROCEDURE PHOTOS 4 Removing the thermistor 2 phase pipe TH6 Photo 4 1 Remove the service panel See Photo 1 U a pipes TH6 2 Remove the top panel See Photo 1 Electrical parts box Clamp 3 Disconnect the connector TH7 6 red on the controller circuit board in the electrical parts box 4 Loosen the clamp for the lead wire in the rear of the electrical parts box 5 Pull out the thermistor 2 phase pipe TH6 from the sensor holder Note In case of replacing thermistor 2 phase pipe TH6 replace it together with thermistor Ambient TH7 since they are combined together Refer to No 5 below to remove thermistor Ambient 5 Removing the thermistor lt Ambient gt TH7 Photo 5 1 Remove the service panel See Photo 1 2 Remove the top panel See Photo 1 3 Disconnect the connector TH7 6 red on the controller circuit board in the electrical parts box 4 Loosen the clamp for the lead wire in the rear of the electrical parts box See Photo 4 5 Pull out the thermistor Ambient TH7 from the sensor holder Lead wire of thermistor Ambient TH7 Note
15. Indoor 3 39 88 Indoor pipe temperature Cond Eva THS 3 Indoor 3 39 88 Controlling status of compressor operating frequency 63 0 255 When the temperature is 100 C or more hundreds digit tens digit and ones digit are displayed by turns Example When 150 C 0 5 secs 0 5secs L 1 50 0 130 When the temperature is 100 C or more hundreds digit tens digit and ones digit are displayed by turns Example When 115 C 0 5 secs 0O 5secs 1 1D 0 999 When it is 100 minutes or more hundreds digit tens digit and ones digit are displayed by turns Example When 415 minutes Minut 0 5 secs O 5secs 2 secs Aoc 4 gt 15 LIL es 39 88 When the temperature is 0 C or less and temperature are displayed by turns 19 7 When the temperature is 0 C or less and temperature are displayed by turns 39 88 When there is no indoor unit 00 is displayed The following code will be a help to know the operating status of unit The tens digit Display Compressor operating frequency control Primary current control Secondary current control The ones digit In this digit the total number of activated control is displayed sl l i isplay erature rise of discharge temperature erature rise of condensing temperature EN ial erature rise of heatsink Example The following controls are activated Primary current c
16. a adjustable wrench h Power 11 Remove the welded pipe of compressor inlet and outlet Compressor N receiver then remove the compressor fixing nut Separator d M 3 a a fixing screw 3 P a k n dn D e Compressor Note Recover refrigerant without spreading it in the air Compressor Receiver leg fixing nut Receiver leg fixing screws 13 Removing the power receiver Photo 12 1 Remove the service panel See Photo 1 2 Remove the top panel See Photo 1 3 Remove 2 front cover panel fixing screws 5 x 12 and remove the front cover panel See Photo 2 1 4 Remove 2 back cover panel fixing screws 5 x 12 and remove the back cover panel 5 Remove the electrical parts box See Photo 3 6 Remove 3 valve bed fixing screws 4 x 10 and 4 ball valve and stop valve fixing screws 5 x 16 then remove the valve bed 7 Remove 3 right side panel fixing screws 5 x 12 in the rear of the unit then remove the right side panel 8 Recover refrigerant 9 Remove 4 welded pipes of power receiver inlet and outlet 10 Remove 2 receiver leg fixing screws 4 x 10 See Photo 11 Note Recover refrigerant without spreading it in the air Outlet Power receiver OCH533A 69 PUHZ SW100VHA UK PUHZ SW100VHA BS UK PUHZ SW120VHA UK PUHZ SW120VHA BS UK OPERATING PROCEDURE PHOTOS amp ILLUSTRATION 1 Removing the service panel and top panel Photo 1 Top panel fixing screws Top panel 1 Remove 3 servi
17. board in the electrical parts box Removing the LEV coil 4 Remove the LEV coil by sliding the coil upward 5 Disconnect the connectors LEV A white and LEV B red on the controller circuit board in the electrical parts box 8 Removing the 4 way valve 1 Remove the service panel See Photo 1 2 Remove the top panel See Photo 1 3 Remove the electrical parts box See Photo 3 4 Remove 3 valve bed fixing screws 4 x 10 and 4 ball valve and stop valve fixing screws 5 x 16 and then remove the valve bed 5 Remove 3 right side panel fixing screws 5 x 12 in the rear of the unit and then remove the right side panel 6 Remove the 4 way valve coil See Photo 7 7 Recover refrigerant 8 Remove the welded part of 4 way valve Note 1 Recover refrigerant without spreading it in the air Note 2 The welded part can be removed easily by remov ing the right side panel Note 3 When installing the 4 way valve cover it with a wet cloth to prevent it from heating 120 C or more then braze the pipes so that the inside of pipes are not oxidized 9 Removing the LEV 1 Remove the service panel See Photo 1 2 Remove the top panel See Photo 1 3 Remove the electrical parts box See Photo 3 4 Remove 3 valve bed fixing screws 4 x 10 and 4 ball valve and stop valve fixing screws 5 x 16 and then remove the valve bed 5 Remove 3 right side panel fixing screws 5 x 12 in the rear of the
18. box SEINS Photo 9 Reactor Electrical parts box DCL Capacitor CE Capacitor band fixing screws 12 Removing the compressor MC 1 Remove the service panel See Photo 1 Photo 10 2 Remove the top panel See Photo 1 3 Remove 2 front cover panel fixing screws 5 x 12 and remove the front cover panel See Photo 3 4 Remove 2 back cover panel fixing screws 5 x 12 and remove the back cover panel 5 Remove the electrical parts box See Photo 3 6 Remove 3 valve bed fixing screws 4 x 10 and 4 ball valve and stop valve fixing screws 5 x 16 then remove the valve a l gt bed WES E DA JS vave 7 Remove 3 right side panel fixing screws 5 x 12 in the Valve bed Sw E 721 E d bed fixing rear of the unit then remove the right side panel PASS d Er E 8 Remove 3 separator fixing screws 4 x 10 and remove f y B the separator 9 Recover refrigerant 10 Remove the 3 points of the motor for compressor fixing nut using a spanner or a adjustable wrench 11 Remove the welded pipe of motor for compressor inlet and outlet then remove the compressor Note Recover refrigerant without spreading it in the air A w Compressor MC receiver 13 Removing the power receiver 1 Remove the service panel See Photo 1 2 Remove the top panel See Photo 1 3 Remove 2 front cover panel fixing screws 5 x 12 and remove the front cover panel See Photo 3 4 Remove 2 back cover panel fixing screws
19. expansion valve firmly Otherwise pipe may break OCH533A 44 a 10 7 TEST POINT DIAGRAM Outdoor controller circuit board PUHZ SW75VHA BS UK CNDC PUHZ SW100VHA BS UK CABG SBOV Connect PUHZ SW1 00YHA BS UK board for VHA connect PUHZ SW120VHA BS UK Vcc TEST POINT Tom nee IMSUBOSIMTOI Ae TEST PONTO voltage between pins of YHA CNDC voltage between pins of C5E PUHZ SW120YHA BS UK cep bc tsv DC250V 380V Vsp TEST POINT voltage between pins of C5A C5B DC 0V when stopped DC 1 6 5V when operated Vre TEST POINT voltage between right CNS Indoor outdoor unit connecting wire 63H pins of PC5C and PC5D High pressure pin 3 and pin 4 switch CNAC TH6 Thermistor 2 phase pipe TH Thermistor lt Ambient gt to Power supply for outdoor controller circuit board 230V AC to Power supply for indoor and outdoor unit connection wire 230V AC CN2 Connect to the outdoor power circuit board CN2 Power circuit board Transmitting signal to the controller circuit board Thermistor lt Outdoor pipe gt Thermistor lt Discharge gt 63HS High pressure sensor TH34 vor Thermistor O eres signal lt Comp surface gt 3 0 Not used LEV A B iS BE WOH OO A Linear expansion valve 6 8 16V DC 16V DC 9 O 0 0 0 4 2184 Four way valve 63L Low pressure switch SW100 120 SW4 Test
20. if noise entered into I F or FTC or outdoor connecting wire Re check error by turning off power and on again 1 Error code displayed on remote controller x2 Refer to Technical manual of ATW I F FTC OCH533A 54 Indication Error Outdoor controller board ss Error TEN TEE Detailed rererence LED Green LED2 Red E P ad U2 Check if stop valves are open P 24 Check if connectors TH4 TH34 LEV A and LEV B on outdoor controller 3 blinking 1 blinking Abnormality of comp surface thermistor TH34 and discharging boad ara nob dS colo iod temperature TH4 Abnormality of superheat due U7 to low discharge temperature 2 blinking Abnormal high pressure High U1 pressure switch 63H operated Abnormal low pressure Low pressure switch 63L operated 3 blinking Abnormality of outdoor fan motor rotational speed Protection from overheat operation TH3 U 4 blinking Compressor overcurrent breaking Start up locked Measure resistance values among terminals on indoor valve and outdoor linear expansion valve using a tester P 25 Check if indoor outdoor units have a short cycle on their air ducts P24 Check if connector 63H 63L on outdoor controller board is not disconnected Check if heat exchanger and filter is not dirty Measure resistance values among terminals on linear expansion valve using a tester U ho N Check the outdoor fan motor Check if connector TH3 on outdoor controller boar
21. o8 i 5 E M H CDLIDDLI Hg 9 eU Wr e 2 2 lela o S CN7 o Connect to the outdoor power circuit board CN7 mio G a L mi o o o RIO LED RGOODOO2 Q L1 A2 L2 A2 L3 A2 L1 OU L2 OU L3 OU Connect to the ACL1 ACL2 ACL3 Connect to the outdoor power circuit board TB L1 L2 L3 OCH533A 91 10 8 FUNCTION OF SWITCHES CONNECTORS AND JUMPERS 1 Function of switches The black square Bil indicates a switch position Type of pL qe by the RENE NE operation mp 1 ro e a 2 Abnormal history clear Clear Normal Off or operating 3 ON ON ON 123456 123456 1234596 Refrigerant address 0 1 2 When power supply ON aa switc mun 5 Em mW 6 1234590 123456 123456 SWA EX l Under suspension Co model select Following SW5 6 reference OFF xm A Oper em Lor o m Nofunction function W7 3 Nofunction IES SW7 Breakersze EN Eg 2 Function switch Setting of demand control 3 Both for indoor unit Breaker size setting DE and outdoor unit Only for outdoor unit Onlv SW75 OFF 25A Default When power supply ON y OFF ONJON 16 k Momm o om W5 CHEN I e e e o Power failure When r ly ON switch E SWs6 paa CT T E cem d SW5 8 EN 1 Forced defrost should be done as follows Change the DIP SW1 1 on the outdoor controller board from OFF to ON C Forced def
22. operation SW5 Function switch 3 Model select 1 a dr le i Lo J Modo select P SW1 Forced defrost detect history record reset refrigerant address CN4 Transmission to out door power circuit board CN4 i ITAI A a MM a m M HH CN52C SW9 SWP SW7 Connect to the outdoor noise CN51 Function switch Pump down Demand control setting filter circuit board SW75V External signal output M the outdoor power circuit Compressor operating signal bn board SW100 120V Abnormal signal ee anes Only for SW VHA o 9 Input of external contact po OCH533A 45 MEM Outdoor noise filter circuit board PUHZ SW75VHA UK PUHZ SW75VHA BS UK El E2 Connect to the earth LI NI Voltage of 230V AC is input Connect to the terminal block TB1 E3 CNAC1 CNAC2 Connect to 230V AC the earth Connect to the outdoor controller circuit board CNAC CN5 Primary current Connect to the outdoor power circuit board CN5 52C relay signal Connect to the outdoor controller circuit board CN52C LO NO Voltage of 230V AC is output Connect ACL OCH533A 46 MEM Outdoor noise filter circuit board PUHZ SW100YHA UK PUHZ SW100YHA BS UK PUHZ SW120YHA UK PUHZ SW120YHA BS UK LI1 LI2 LIS NI POWER SUPPLY LI1 LI2 LI LIS LI3 LI 1 AC400V input LI1 NI LI2 NI LI3 NI AC230V input Connect to the terminal block TB1 l laesi dV
23. the outdoor controller circuit board CNDC CN2 Connect to the outdoor controller circuit board CN2 D Outdoor power circuit board Transmitting signal to the outdoor controller circuit board 0 5V DC Zero cross signal 0 5V DC Thermistor Connect from the Primary current detection 3 0 Not used lt Heatsink gt outdoor controller Connect to the outdoor 8 8 46V DC 4 TH8 circuit board noise filter circuit board 16V DC RUSO CN4 CN5 OCH533A 48 MEM NM Outdoor power circuit board PUHZ SW100VHA UK PUHZ SW100VHA BS PUHZ SW120VHA UK PUHZ SW120VHA BS CN4 Connect to the outdoor controller circuit board CN4 UK UK CN2 Brief Check of POWER MODULE Usually they are in a state of being short circuited if they are broken Measure the resistance in the following points connectors etc If they are short circuited it means that they are broken 1 Check of POWER MODULE D Check of DIODE circuit Check of IGBT circuit L2 Check of INVERTER circuit Note The marks R S P N1 U V and shown in the diagram are not actually printed on the board Connect to the outdoor controller circuit board CN2 1 5 Transmitting signal to outdoor controller circuit board 0 5 V DC 2 5 Zero cross signal 0 5 V DC 3 4 18 V DC 6 5 16 V DC 7 5 16 V DC N2 CN52C CNDC Conn
24. valve fixing screws 5 x 16 then remove the valve bed 4 Remove 4 right side panel fixing screws 5 x 12 in the rear of the unit then remove the right side panel 5 Remove the LEV See Photo 8 6 Recover refrigerant 7 Remove the welded part of LEV 11 Removing the high pressure switch 63H 1 Remove the service panel See Photo 1 2 Remove the top panel See Photo 1 3 Remove 3 right side panel fixing screws 5 x 12 in the rear of the unit and remove the right side panel 4 Pull out the lead wire of high pressure switch 5 Recover refrigerant 6 Remove the welded part of high pressure switch OCH533A Tf Recover refrigerant without spreading it in the air The welded part can be removed easily by removing the right side panel When installing the 4 way valve and LEV cover it with a wet cloth to prevent it from heating 120 C or more then braze the pipes so that the inside of pipes are not oxidized When installing the high pressure switch cover it with a wet cloth to prevent it from heating 100 C or more then braze the pipes so that the inside of pipes are not oxidized OPERATING PROCEDURE PHOTOS 12 Removing the reactors ACL1 ACL2 ACL3 Photo 12 1 1 Remove the service panel See Photo 1 2 Remove the top panel See Photo 1 Front panel Screw Controller circuit 3 Remove the 6 screws screw and 9 5 x 12 that fix the front panel and remove the front panel See Ph
25. 0 times 425 x100 times 0 5secs 0 5secs 4 gt 25 gt 0 0 9999 When it is 100 hours or more hundreds digit tens digit and ones digit are displayed by turns Example When 2450 hours 245 x10 hours 0 5 secs 0 5secs 2 45 EET 0 50 Omit the figures after the decimal fractions 0 255 When it is 100Hz or more hundreds digit tens digit and ones digit are displayed by turns Example When 125Hz 0 5 secs 0 5secs L 1 25 e 0 480 When it is 100 pulse or more hundreds digit tens digit and ones digit are displayed by turns Example When 150 pulse 0 5secs 0 5secs L 1 50 e Postponement code display Blinking During postponement Lighting Cancellation of postponement 00 is displayed in case of no postponement Operation mode of when operation stops due to error is displayed by setting SW2 like below SW2 ON 123456 2 Secs 2 Secs 2 Secs 2 Secs 2 Secs 2 Secs 100 times Code display Code display The black square lil indicates a switch position SW2 setting Display detail Explanation for display Pipe temperature Liquid TH3 on error 40 90 occurring When the coil thermistor detects OC or below ON 40 90 and temperature are displayed by turns Example When 15 C e 123456 0 5 secs O 5secs 2 secs L i eel re E Compressor temperature TH4 or 3 217 discharge temperature TH4 on error When
26. Check method of DC fan motor fan motor outdoor controller circuit board Notes High voltage is applied to the connecter CNF1 2 for the fan motor Pay attention to the service Do not pull out the connector CNF1 2 for the motor with the power supply on It causes trouble of the outdoor controller circuit board and fan motor Self check Symptom The outdoor fan cannot turn around Fuse check Check the fuse F5 on outdoor controller board Did the fuse blow V No Wiring contact check Contact of fan motor connector CNF1 2 V Is there contact failure Yes gt V No Power supply check Remove the connector CNF1 2 Measure the voltage in the outdoor controller circuit board Replace outdoor controller board C B ae eg and fan motor MF1 2 TEST POINT Voc between 1 and 4 of the fan connector Voc DC250 330V TEST POINT Vcc between 5 and 4 of the fan connector Vcc DC15V V Is the voltage normal Yes gt Replace the fan motor Jy Yes OK eX END Check the operation of fan gt END Replace outdoor controller board Y NG ap Replace outdoor controller board OK Check the operation gt V NG Replace the fan motor 10 6 HOW TO CHECK THE COMPONENTS lt HIGH PRESSURE SENSOR gt Vout V MULTI CONTROLLER BOARD 5V DC PRESSURE Output Vout DC MPa OCH533A 41 A lt Thermistor feature chart gt 50 Low temperature the
27. LEV B 4 way valve coil 2194 1 Remove the service panel See Photo 1 LEV coil 2 Remove the top panel See Photo 1 d LEV A Removing the 4 way valve coil 3 Remove 4 way valve coil fixing screw M5 x 6 4 Remove the 4 way valve coil by sliding the coil toward you 5 Disconnect the connector 2184 green on the controller circuit board in the electrical parts box Removing the LEV coil 3 Remove the LEV coil by sliding the coil upward 4 Disconnect the connectors LEV A white and LEV B red on the controller circuit board in the electrical parts box 8 Removing the 4 way valve 1 Remove the service panel See Photo 1 Charge plug 2 Remove the top panel See Photo 1 Low pressure 3 Remove 3 valve bed fixing screws 4 x 10 and 4 ball Photo 8 valve and stop valve fixing screws 5 x 16 then remove the valve bed LEV coil 4 Remove 4 right side panel fixing screws 5 x 12 in the EV BJ rear of the unit then remove the right side panel 5 Remove the 4 way valve coil See Photo 7 6 Recover refrigerant 7 Remove the welded part of 4 way valve 9 Removing LEV 1 Remove the service panel See Photo 1 2 Remove the top panel See Photo 1 3 Remove 3 valve bed fixing screws 4 x 10 and 4 ball valve and stop valve fixing screws 5 x 16 then remove the valve bed 4 Remove 4 right side panel fixing screws 5 x 12 in the rear of the unit then remove the right side panel 5
28. USTRATION 6 Remove the terminal cover and disconnect the compres Photo 3 2 sor lead wire 7 Remove 2 electrical parts box fixing screws 4 x 10 and detach the electrical parts box by pulling it upward The electrical parts box is fixed with 2 hooks on the left and 1 hook on the right Electrical ats box Electrical parts box fixing screw 4 Disassembling the electrical parts box Electrical 1 Disconnect all the connectors on the controller circuit board Photo 4 1 WA parts box 2 Remove the 3 screws screw and G that fix the plate equipped with the outdoor controller circuit board and the electrical parts box screw from the front and the screw and from the bottom of the electrical parts box See Photo 4 1 and 4 2 3 Slide the plate in the direction of the arrow A and remove it See Photo 5 4 Remove the lead wires from the clamp on the bottom of the electrical parts box See Photo 4 3 Screw D 5 Remove the 3 screws screw and that fix the bottom side of the electrical parts box and remove the bottom side plate by sliding in the direction of the arrow B Xf See Photo 4 3 and 4 4 SE Controller 6 Remove the noise filter circuit board from the electrical circuit board parts box Then remove the 2 screws screw and C that C B fix the plate equipped with the noise filter circuit board and converter circuit board See Photo 4 5 Note When reassembling the electri
29. cal parts box make sure the wirings are correct Photo 4 2 Clam Bottom plate of Photo 4 3 E gem p electrical parts vm box Screw Screw S 1 S u d crew fj a Screw M b f m Electrical parts B 7 box Heatsink gt Bottom plate of electrical parts box Photo 4 4 EI m Photo 4 5 Electrical parts box Noise filter circuit board Converter N F circuit board CONV B p Screwd Screw a Power circuit board P B F EAF AN i g Nest L 1 Noise filter circuit board N F OCH533A 19 OPERATING PROCEDURE PHOTOS 5 Removing the thermistor 2 phase pipe TH6 Photo 5 1 Remove the service panel See Photo 1 2 Remove the top panel See Photo 1 Thermistor Electrical parts box lt 2 phase pipe gt TH6 3 Disconnect the connector TH7 6 red on the controller w ML i lr hme a io gt a cee fa d 3 i ES j N r g i j i v Hi i 5 circuit board in the electrical parts box 4 Loosen the 2 wire clamps on top of the electrical parts box 5 Pull out the thermistor 2 phase pipe TH6 from the sensor holder 4 VE Note In case of replacing thermistor 2 phase pipe TH6 replace it together with thermistor Ambient TH7 since they are combined together Refer to No 6 below to remove thermistor Ambient 6 Removing the thermistor Ambient TH7 1 Remove the service panel See Photo
30. ce panel fixing screws 5 x 12 and slide M the hook on the right downward to remove the service ED Service panel panel b fixing screws 2 Remove screws 3 for front 3 for rear 5 x 12 of the top Grille LL WEE lt Service panel fixin panel and remove it EE Fan grille fixing ilf Screws 1 Service panel fixing screws 2 Removing the fan motor MF1 MF2 Photo 2 1 Front panel Photo 2 2 1 Remove the service panel See Photo 1 2 Remove the top panel See Photo 1 3 Remove 5 fan grille fixing screws 5 x 12 to detach the fan grille See Photo 1 4 Remove a nut for right handed screw of M6 to detach the propeller See Photo 2 1 5 Disconnect the connectors CNF1 CNF2 on controller circuit board in electrical parts box 6 Remove 4 fan motor fixing screws 5 x 20 to detach the fan motor See Photo 2 2 Fan Propeller Fan motor fixing screws motor 3 Removing the electrical parts box Photo 3 1 Remove the service panel See Photo 1 2 Remove the top panel See Photo 1 3 Disconnect the indoor outdoor connecting wire from termi nal block 4 Disconnect the connector CNF1 CNF2 LEV A and LEV B on the controller circuit board lt Symbols on the board gt CNF1 CNF2 Fan motor LEV A LEV B LEV lt Diagram symbol in the connector housing gt Thermistor Liquid TH3 Thermistor Discharge TH4 Thermistor 2 phase pipe Ambient TH6 7 High press
31. connect the connector TH7 6 red on the controller circuit board in the electrical parts box 4 Loosen the clamp for the lead wire in the rear of the electrical parts box See Photo 4 5 Pull out the thermistor lt Outdoor gt TH7 from the sensor holder Note In case of replacing thermistor lt Ambient gt TH7 replace it together with thermistor lt 2 phase pipe gt TH6 since they are combined together Refer to No 4 above to remove thermistor lt 2 phase pipe gt Sensor holder 6 Removing the thermistor lt Liquid gt TH3 and thermistor Photo 6 lt Discharge gt TH4 thermistor lt Comp surface gt TH34 Thermistor lt Liquid gt TH3 1 Remove the service panel See Photo 1 2 Disconnect the connectors TH3 white and TH4 white TH34 red on the controller circuit board in the electrical parts box 3 Loosen the clamp for the lead wire in the rear of the electrical parts box See Photo 4 4 Pull out the thermistor Liquid TH3 and thermistor Discharge TH4 from the sensor holder Removing the thermistor lt Comp surface TH34 5 Remove the sound proof cover upper for compressor 6 Pull out the thermistor Comp surface TH34 from the holder of the compressor shell Thermistor Motor for compressor Thermistor Comp surface MC Discharge TH34 TH4 OCH533A 11 OPERATING PROCEDURE PHOTOS 7 Removing the 4 way valve coil 2194 and LEV coil Photo 7 T LEV A
32. d is disconnected Check if stop valves are open Check looseness disconnection and converse connection of compressor wiring Measure resistance values among terminals on compressor using a tester Check if outdoor unit has a short cycle on its air duct Check if unit is filled with specified amount of refrigerant Compressor overcurrent breaking Abnormality of current sensor P B Abnormality of power module 5 blinking Open short of discharge thermistor TH4 and comp surface thermistor TH34 Open short of outdoor thermistors U TH3 TH6 TH7 and TH8 6 blinking Abnormality of heatsink temperature 7 blinking Abnormality of voltage Check if connectors TH3 TH4 TH6 TH7 and TH34 on outdoor controller board and connector CN3 on outdoor power board are not disconnected Measure resistance value of outdoor thermistors 3 Check if indoor outdoor units have a short cycle on their air ducts P25 Measure resistance value of outdoor thermistor TH8 C c1 co A IL U ToO co r Check looseness disconnection and converse connection of compressor wiring Measure resistance value among terminals on compressor using a tester Check the continuity of contactor 52C Check if power supply voltage decreases Check the wiring of CN52C amp Check the wiring of CNAF Check if connectors CN20 CN21 CN29 and CN44 on indoor controller board are not disconnected Measure resistance value of indoo
33. ect to the smoothing 52C driving signal 280 380 V DC capacitor CB Connect to the outdoor Connect to the outdoor Power module controller circuit board controller circuit board CN52C CNDC E2 E3 U V W Connect to the compres sor MC Voltage among phases 10 V 180 V AC OCH533A Connect to the earth en HAND ING A LIT y lf II _ i eil IP DCL1 DCL2 El E4 CNAC1 CNAC2 NI LI Connect to the smooth Connect to DCL Connect to the 230 V AC Voltage of 230 V AC is ing capacitor CB earth Connect to the out input Connect to the ter door controller circuit minal block TB1 board CNAC 49 Outdoor power circuit board Brief Check of POWER MODULE PUHZ SW100YHA UK Usually they are in a state of being short circuited if they are broken Measure the resistance in the following points connectors etc PUHZ SW100YHA BS UK If they are short circuited it means that they are broken PUHZ SW120YHA UK 1 Check of DIODE MODULE PUHZ SW120YHA BS UK 2 Check of DIP IPM Note The marks j HED WES IN2 P1 P2 LU V and shown in the diagram are not actually printed on the board TB N1 TB U TB V TB W Connect to the CK capacitor Connect to the compressor MC Voltage among phases 10V 400V AC Diode module DIP IPM is E NS HD
34. er moves from 6 to in case coil is burnt out or motor is locked by open phase gt Close OBS i Sound can be detected by placing the ear against the screw driv er handle while putting the screw driver to the linear expansion i valve 500 pulse Opening a valve all the way I I M Pulse number Extra tightning about 32 pulse OCH533A 43 yO 3 How to attach and detach the coil of linear expansion valve lt Composition gt Linear expansion valve is separable into the main body and the coil as shown in the diagram below Stopper Main body Coil Lead wire lt How to detach the coil gt Hold the lower part of the main body shown as A firmly so that the main body does not move and detach the coil by pulling it upward Be sure to detach the coil holding main body firmly Otherwise pipes can bend due to pressure lt How to attach the coil gt Hold the lower part of the main body shown as A firmly so that the main body does not move and attach the coil by inserting it downward into the main body Then securely attach the coil stop per to main body At this time be careful that stress is not added to lead wire and main body is not wound by lead wire If the stopper is not firmly attached to main body coil may be detached from the main body and that can cause defective operation of lin ear expansion valve To prevent piping stress be sure to attach the coil holding the main body of linear
35. f pipes are not oxidized High pressure switch 63H 11 Removing the reactor ACL 1 Remove the service panel See Photo 1 Photo 10 2 Remove the top panel See Photo 1 Reactor fixing screws 3 Remove the electrical parts box See Photo 3 4 Remove 4 reactor fixing screws 4 x 20 and remove the reactor The reactor is attached to the rear of the electrical parts box Reactor ACL Electrical parts box Reactor fixing screws P OCH533A 68 OPERATING PROCEDURE PHOTOS 12 Removing the compressor MC Photo 11 1 Remove the service panel See Photo 1 2 Remove the top panel See Photo 1 3 Remove 2 front cover panel fixing screws 5 x 12 and remove the front cover panel See Photo 2 1 ie E 4 Remove 2 back cover panel fixing screws 5 x 12 and Valve bed M mf 1 T remove the back cover panel fixing screw Wa Se INC L wi 5 Remove the electrical parts box See Photo 3 ca E di Ji T 6 Remove 3 valve bed fixing screws 4 x 10 and 4 ball valve d LB P and stop valve fixing screws 5 x 16 and then remove the AE L8 sr ES Valve bed valve bed IB ls 22 fixing 7 Remove 3 right side panel fixing screws 5 x 12 in the VANE DEU F A TARNE rear of the unit then remove the right side panel 8 Remove 3 separator fixing screws 4 x 10 and remove the separator 9 Recover refrigerant 10 Remove the 3 points of the compressor fixing nut using a Separator spanner or
36. l and remove it Top panel fixing screws Top panel o 4 pp Fan grille Service panel Grille fixing screws fixing screws 2 Removing the fan motor MF1 1 Remove the service panel See Photo 1 2 Remove the top panel See Photo 1 3 Remove 5 fan grille fixing screws 5 x 12 to detach the fan grille See Photo 1 4 Remove a nut for right handed screw of M6 to detach the propeller See Photo 2 1 5 Disconnect the connector CNF1 on controller circuit board in electrical parts box 6 Remove 4 fan motor fixing screws 5 x 20 to detach the fan motor See Photo 2 2 Photo 2 1 Photo 2 2 Fan Propeller motor Fan motor fixing screws Front panel Fan motor Front panel fixing screws fixing screw 3 Removing the electrical parts box 1 Remove the service panel See Photo 1 2 Remove the top panel See Photo 1 3 Disconnect the indoor outdoor connecting wire from terminal block 4 Disconnect the connector CNF1 LEV A and LEV B on the controller circuit board Symbols on the board CNF1 Fan motor LEV A LEV B LEV 5 Disconnect the pipe side connections of the following parts e Thermistor Liquid TH3 Thermistor Discharge TH4 e Thermistor Ambient 2 phase pipe TH7 6 Thermistor lt Heatsink gt TH8 High pressure switch 63H e 4 way valve coil 2184 e Thermistor Comp surface TH34 5 Remove the terminal cover and disconnect the compressor lead wire
37. lve coil 2184 and LEV coil Photo 8 LEV A LEV B 4 way valve coil 4 way valve coil x 1 Remove the service panel See Photo 1 fixing screw 2184 2 Remove the top panel See Photo 1 LEV coil LEV A Removing the 4 way valve coil 3 Remove 4 way valve coil fixing screw M5 x 6 4 Remove the 4 way valve coil by sliding the coil toward you 5 Disconnect the connector 2184 green on the controller circuit board in the electrical parts box 4 way valve Removing the LEV coil 3 Remove the LEV coil by sliding the coil upward 4 Disconnect the connectors LEV A white and LEV B red on the controller circuit board in the electrical parts box 9 Removing the 4 way valve 1 Remove the service panel See Photo 1 2 Remove the top panel See Photo 1 3 Remove 3 valve bed fixing screws 4 x 10 and 4 ball valve and stop valve fixing screws 5 x 16 then remove the valve bed 4 Remove 4 right side panel fixing screws 5 x 12 in the rear of the unit then remove the right side panel 5 Remove the 4 way valve coil See Photo 8 6 Recover refrigerant 7 Remove the welded part of 4 way valve Charge plug Low pressure Photo 9 LEV coil LEV B High pressure switch 63H 4 way valve AA OW FF 10 Removing LEV 1 Remove the service panel See Photo 1 2 Remove the top panel See Photo 1 3 Remove 3 valve bed fixing screws 4 x 10 and 4 ball valve and stop
38. ndition and the meaning of error code by controlling DIP SW2 on A Control Service Tool Operation indicator SW2 Indicator change of self diagnosis SW2 setting Display detail Explanation for display ON 123456 Digital indicator LED1 working details Be sure that the 1 to 6 in the SW2 are set to OFF 1 Display when the power supply ON When the power supply ON blinking displays by turns 1 second Wait for 4 minutes at the longest interval 2 When the display lights Normal operation Operation mode display Lightin Lighting SW2 ON Senne Initial setting 123456 The tens digit Operation mode The ones digit Relay output Display Operation Model O OFF FAN J H HEATNG HEATING a DEFROSTING C5 is displayed during replacement operation Display during error postponement Postponement code is displayed when compressor stops due to the work of protection device Postponement code is displayed while error is being postponed 3 When the display blinks Inspection code is displayed when compressor stops due to the work of protection devices isplay Contents to be inspected During operation o Set 1 TAbnormal high pressure 63H worked S CSOO W UO 2 Abnormal high discharging temperature and shell thermistor shortage of refrigerant 3 Openishort circuit of discharging thermistor TH4 and comp surface thermistor TH34 ea onan
39. on sound 3 to 4 dB lower than that of usual Adding a commercial timer or on off switch contactor setting to the CNDM connector which is optional contactor for demand input located on the outdoor controller board enables to control compressor operation frequency The performance depends on the load of conditioned outdoor temperature How to wire Low level sound priority mode circuit Insulate this point securely as Adaptor for external this is not used signal input PAC SC36NA Outdoor unit Purchased locally controller board l Relay supply D swi NDM E SW1 Switch x X Relay Contact spec DC1mA Max 10 m including local wiring 1 Make the circuit as shown above with Adaptor for external signal input PAC SC36NA 2 Turn SW1 to on for Low level sound priority mode Turn SW1 to off to release Low level sound priority mode and normal operation b On demand control Local wiring Demand control is available by external input In this mode power consumption is decreased within the range of usual 0 100 How to wire Basically the wiring is the same as a Connect an SW 1 which is procured at field to the between Orange and Red 1 and 3 of the Adaptor for external signal input PAC SC36NA and insulate the tip of the brown lead wire It is possible to set it to the following power consumption compared with ratings by setting the SW7 1 2 SW wra E OFF 096 Operation stop
40. ontrol LED Preventive control for excessive tempe rature rise of condensing temperature Preventive control for excessive tempe rature rise of heatsink The black square Bil indicates a switch position SW2 setting Display detail Explanation for display Comp surface temperature TH34 3 217 U9 Error details To be shown while error call is deferred ON 123456 OCH533A 3 217 When the comp shell thermistor detects 100 C or more hundreds digit tens digit and ones digit are displayed by turns Example When 105 C 0 5 secs O 5secs 2 secs 1 05 LIE ee Description Display No error 00 Overvoltage error 01 Undervoltage error Input current sensor error Li phase open error Abnormal power synchronous signal PFC error SW75VHA Code Overvoltage Undervoltage Overcurrent PFC IGBT error SW VHA Undervoltage Display examples for multiple errors Overvoltage 01 Undervoltage 02 03 Undervoltage 02 Power sync signal error 08 0A L phase open error 04 PFC error 10 14 display 64 11 DISASSEMBLY PROCEDURE PUHZ SW75VHA UK PUHZ SW75VHA BS UK OPERATING PROCEDURE PHOTOS amp ILLUSTRATION 1 Removing the service panel and top panel Photo 1 1 Remove 3 service panel fixing screws 5 x 12 and slide the hook on the right downward to remove the service panel 2 Remove screws 3 for front 3 for rear 5 x 12 of the top pane
41. or less and ON temperature are displayed by turns Example When 15 C 1533 4 5 8 0 5 secs O 5secs 2 secs Jp 416 00 Ho 2 phase pipe TH6 on error occurring 39 88 39 88 When the temperature is 0 C or less and ON temperature are displayed by turns Example When 15 C 123456 0 5 secs O 5secs 2 secs E 45 Siig MEE Ambient temperature TH7 on error 39 88 occurring When the temperature is 0 C or less and ON 39 88 temperature are displayed by turns Example When 15 C 123456 0 5 secs O 5secs 2 secs 715 00 Outdoor heatsink temperature TH8 on 40 200 1 error occurring When the temperature is 0 C or less and 40 200 temperature are displayed by turns ON When the temperature is 100 C or more hundreds digit tens digit and ones digit are displayed by turns 123456 OCH533A 62 The black square Bil indicates a switch position SW2 setting Display detail Explanation for display Discharge superheat on error occurring O 123456 ON 123456 O 123456 ON 123456 ON 123456 ON N N 1 123456 OCH533A SHd 0 255 Cooling TH4 Tesus Heating TH4 Tesus Sub cool on error occurring SC 0 130 Cooling Te3Hs TH3 Heating Tesus TH2 Thermo on time until error stops 0 999 Indoor pipe temperature Liquid TH2 3
42. oto 3 4 Remove the 2 screws screw and both 4 x 10 that fix the separator screw W from the valve bed and screw from the bottom of the separator and tilt the separator to the side of the fan motor slightly See Photo 12 1 and 12 2 5 Disconnect the lead wires from the reactor and remove the 4 screws screw that fix the reactor to remove the reactor See Photo 12 3 and 12 4 Note 1 The reactor is very heavy 4kg Be careful when handling it Note 2 The reactor box is also removable Reactor box Separator Screw p Photo 12 3 Propeller Reactor box Reactor box 4 way valve Reactors ERBEN OCH533A 78 Photo 12 4 board C B Electrical parts box a ana 3 IZ Valve bed UL LLLI JE HET a A Compressor jal cay ae TAA MC Terminal cover Cover panel fas a Front Cover panel fixing screws Screw 9 MM OPERATING PROCEDURE PHOTOS 13 Removing the compressor MC Photo 13 1 Remove the service panel See Photo 1 2 Remove the top panel See Photo 1 3 Remove 2 front cover panel fixing screws 5 x 12 and remove the front cover panel See Photo 3 1 4 Remove 2 back cover panel fixing screws 5 x 12 and Ds remove the back cover panel x 5 Remove the electrical parts box See Photo 3 X 6 Remove 3 valve bed fixing screws 4 x 10 and 4 ball valve Nh j and stop valve fixing screws 5 x 16 and then remove the N val
43. r of connected indoor units are dis played Unit Capacity setting display Displayed as an outdoor capacity code Capacity SW75V Code display SW100V 100Y SW120V 120Y Single phase 3 phase O Single phase 2 3 phase The ones digit Setting details Display details Defrosting switch O Normal 1 For high humidity Outdoor unit setting information The tens digit Total display for applied setting Setting details Display details H P Cooling only O H P 1 Cooling only Code display Example When heat pump 3 phase and defrosting normal are set up 20 is displayed Indoor pipe temperature Liquid TH2 1 39 88 Indoor 1 When the temperature is OC or less 39 88 temperature are displayed by turns 11 5 and Indoor pipe temperature Cond Eva 39 88 TH5 1 When the temperature is OC or less and Indoor 1 temperature are displayed by turns 39 88 Indoor pipe temperature Liquid TH2 2 39 88 Indoor 2 When the temperature is OC or less and 39 88 temperature are displayed by turns C Indoor pipe temperature Cond Eva 39 88 TH5 2 When the temperature is OC or less and Indoor 2 temperature are displayed by turns 39 88 Indoor room temperature TH1 8 39 59 The black square lil indicates a switch position SW2 setting Display detail Explanation for display Indoor setting temperature 17 30
44. r thermistors Check if connector CN31 CN4F on indoor controller board is not disconnected Measure resistance value of indoor thermistors eco resistance value among terminals on drain up machine using a tester Check if drain up machine works amp Check drain function Indoor drain overflow protection P Check if indoor unit has a short cycle on its air duct Check if heat exchanger and filter is not dirty Measure resistance value on indoor and outdoor fan motors Check if the inside of refrigerant piping is not clogged 3 blinking Freezing cooling overheating heating protection 4 blinking Abnormality of pipe temperature Check if indoor thermistors TH2 and TH5 are not disconnected from holder Check if stop valve is open E Check converse connection of extension pipe on plural units connection Check if indoor outdoor connecting wire is connected correctly on plural units connection 4 blinking 1 blinking Abnormality of room temperature thermistor TH1 P1 P2 Abnormality of pipe temperature 2 blinking Abnormality of drain sensor DS P4 5 x1 Error code displayed on remote controller x2 Refer to service manual for indoor unit OCH533A 55 MM M Outdoor unit operation monitor function When optional part A Control Service Tool PAC SK52ST is connected to outdoor controller board CNM Digital indicator LED1 displays 2 digit number or code to inform operation co
45. rew of M6 to detach the propeller See Photo 2 1 5 Disconnect the connectors CNF1 CNF2 on controller circuit board in electrical parts box 6 Remove 4 fan motor fixing screws 5 x 20 to detach the fan motor See Photo 2 2 Photo 2 1 Front panel Photo 2 2 Fan Propeller Fan motor fixing screws motor Fan motor fixing screws 3 Removing the electrical parts box Photo 3 1 Remove the service panel See Photo 1 2 Remove the top panel See Photo 1 Controller circuit Front panel eae alla board C B Screw 3 Disconnect the indoor outdoor connecting wire from terminal block 4 Disconnect the connector CNF1 CNF2 LEV A and LEV B on the controller circuit board lt Symbols on the board gt CNF1 CNF2 Fan motor LEV A LEV B LEV 5 Disconnect the pipe side connections of the following parts e Thermistor Liquid TH3 e Thermistor Discharge TH4 Thermistor 2 phase pipe gt TH6 Thermistor lt Ambient gt TH7 e Thermistor Comp surface TH34 High pressure switch 63H High pressure sensor 63HS Low pressure switch 63L e 4 way valve coil 2184 OCH533A 14 cover Electrical parts box Noise filter circuit board N F Terminal block TB1 block TB2 Valve bed Compressor MC Terminal ac Cover panel Front Cover panel fixing screws Continued to the next page O From the previous page OPERATING PROCEDURE PHOTOS amp ILL
46. rmistors e Thermistor lt Liquid gt TH3 e Thermistor lt 2 phase pipe gt TH6 e Thermistor lt Ambient gt TH7 D O Q CO Thermistor RO 15kQ 3 B constant 3480 2 1 1 Rt 15exp 3480 57341 273 OC 15kQ 30C 4 3kQ 10C 9 6kQ 40C 3 0kQ 20C 6 3kQ 10 25C 5 2kQ Resistance k NO 20 10_0 10 20 30 40 50 Temperature C Medium temperature thermistor 200 Thermistor lt Heatsink gt TH8 Thermistor R50 17kQ 2 150 B constant 4150 3 ST 1 1 Rt 17exp 4150 57344 393 3 OC 180kQ 5 n 25C 50kQ oc 50 C 17kQ 70C 8kQ 90C 4kQ 50 0 25 50 75 100 125 Temperature C High temperature thermistor US Thermistor Discharge TH4 e Thermistor Comp surface TH34 400 Thermistor R120 7 465kQ 296 o p B constant 4057 2 Q 300 1 1 Q Rt 7 465exp 4057 573411 393 a 20C 250kQ 70C 34kQ 9 200 30C 160kQ 80C 24kO 40C 104kQ 90C 17 5KQ 50C 70kQ 100C 13 0kQ 60C 48kQ 110C 9 8kQ 100 0
47. rost will start by the above operation if all these conditions written below are satisfied Heat mode setting 10 minutes have passed since compressor started operating or previous compulsory defrosting finished Pipe temperature is less than or equal to 8C Forced defrost will finish if certain conditions are satisfied Forced defrost can be done if above conditions are satisfied when DIP SW1 1 is changed from OFF to ON After DIP SW1 1 is changed from OFF to ON there is no problem if DIP SW1 1 is left ON or changed to OFF again This depends on the service conditions 2 Power failure automatic recovery can be set by either remote controller or this DIP SW If one of them is set to ON Auto recovery activates Please set Auto recovery basically by remote controller because all units do not have DIP SW Please refer to the indoor unit installation manual x3 SWT 1 2 are used for demand control SW7 1 2 are effective only at the demand control Refer to next page Special function b x4 Please do not use SW7 3 6 usually Trouble might be caused by the usage condition OCH533A 52 MEM NN 2 Function of connector Action by open short operation o Types Connector Function Effective timing Special function a Low level sound priority mode Local wiring Unit enters into Low level sound priority mode by external signal input setting Inputting external signals to the outdoor unit decreases the outdoor unit operati
48. tdoor unit disconnection Check if noise entered into I F or FTC or outdoor connecting Startup time over 00 wire or power supply Startup time over 00 MMe HOver Re check error by turning off power and on again 2 blinking F or FTC or outdoor unit communication WT b Dee signal receiving error is detected by E6 OCheck if I F or FTC or outdoor connecting wire is connected FTC unit correctly I F or FTC or outdoor unit omen Check if noise entered into I F or FTC or outdoor connecting E8 error signal receiving error is detected by wire or power supply outdoor unit Check if noise entered into I F or FTC or outdoor controller I F or FTC or outdoor an communication board error transmitting error is detected by E9 l outdoor unit Re check error by turning off power and on again 3 blinking Remote controller signal receiving Fo OCheck if connecting wire of I F or FTC unit or remote controller error is detected by remote controller is connected correctly Remote controller transmitting error E3 Check if noise entered into transmission wire of remote is detected by remote controller controller Remote controller signal receiving E4 Re check error by turning off power and on again error is detected by I F or FTC unit Remote controller transmitting error E5 is detected by I F or FTC unit 4 blinking Error code is not defined EF OCheck if noise entered into transmission wire of remote controller OCheck
49. the temperature is 100 C or more the ON occurring hundreds digit tens digit and ones digit are 3 217 displayed by turns C 123456 Example When 130C 0 5 secs O 5secs 2 secs gt 30 gt H Compressor operating current on error occurring ON 0 50 123456 Error code history 1 latest When no error history Alternate display of abnormal unit 0 and are displayed by turns ON anaa number and code Code displa 123456 d Error code history 2 When no error history Alternate display of error unit number 0 and are displayed by turns ispla displ 123456 NUN Thermostat ON time 0 999 0 999 When it is 100 minutes or more the hundreds digit tens digit and ones digit are displayed by turns Example When 245 minutes Minute 0 5 secs O 5secs 2 secs ON l2 45 LIL Mee o o rs sf l 123456 Test run elapsed time 0 120 0 120 When it is 100 minutes or more the hundreds digit tens digit and ones digit are displayed by turns Example When 105 minutes Minute 0 5 secs O 5secs 2 secs 1 gt 05 00 t SS o I OCH533A 58 l ON 123456 ON 123456 ON 123456 ON 123456 ON 123456 ON 123456 ON 123456 ON A 123456 OCH533A The black square Bil indicates a switch position SW2 setting Display detail Explanation for display The number of connected indoor units 0 3 The numbe
50. unit and then remove the right side panel 6 Remove the LEV 7 Recover refrigerant 8 Remove the welded part of linear expansion valve Note 1 Recover refrigerant without spreading it in the air Note 2 The welded part can be removed easily by remov ing the right side panel Note 3 When installing the LEV cover it with a wet cloth to prevent it from heating 120 C or more then braze the pipes so that the inside of pipes are not oxidized OCH533A 67 Photo 7 4 way valve coil 4 way valve fixing screw High pressure switch 63H Photo 8 LEV coil LEV A Valve bed Valve bed fixing screws OPERATING PROCEDURE PHOTOS 10 Removing the high pressure switch 63H Photo 9 aed qi Of 1 Remove the service panel See Photo 1 high pressure switch 2 Remove the top panel See Photo 1 3 Remove the electrical parts box See Photo 3 4 Remove 3 right side panel fixing screws 5 x 12 in the rear of the unit and remove the right side panel 5 Pull out the lead wire of high pressure switch 6 Recover refrigerant 7 Remove the welded part of high pressure switch Note 1 Recover refrigerant without spreading it in the air Note 2 The welded part can be removed easily by removing the right side panel Note 3 When installing the high pressure switch cover it with a wet cloth to prevent it from heating 100 C or more then braze the pipes so that the inside o
51. ure switch 63H High pressure sensor 63HS Low pressure switch 63L e 4 way valve coil 2184 e Thermistor Comp surface TH34 TV ud Compressor MC 5 Remove the terminal cover and disconnect the compres sor lead wire T Terminal cover 6 Remove an electrical parts box fixing screw 4 x 10 and f j lt detach the electrical parts box by pulling it upward The T ad electrical parts box is fixed with 2 hooks on the left and 1 hook on the right ride ron Cover panel fixing screws OCH533A 70 OPERATING PROCEDURE PHOTOS 4 Removing the thermistor 2 phase pipe TH6 Photo 4 1 Remove the service panel See Photo 1 2 Remove the top panel See Photo 1 Electrical parts box TH6 3 Disconnect the connectors TH7 6 red on the controller i circuit board in the electrical parts box 4 Loosen the clamp for the lead wire in the rear of the electrical parts box 4 5 Pull ie thermistor 2 phase pipe TH6 from the e em P tiii he aes 3E Thermistor 2 phase pipe zw gr E E z Lip itd anms dm b au S let TT i Note In case of replacing thermistor lt 2 phase pipe gt TH6 replace it together with thermistor lt Ambient gt TH7 since they are combined together Refer to No 5 below to remove thermistor lt Ambient gt 5 Removing the thermistor lt Ambient gt TH7 1 Remove the service panel See Photo 1 2 Remove the top panel See Photo 1 3 Dis
52. ve bed Valve bed sls 7 Remove 3 right side panel fixing screws 5 x 12 in the TN rear of the unit and then remove the right side panel k z 8 Remove 3 separator fixing screws 4 x 10 and remove the separator Separator 9 Recover refrigerant 10 Remove the 3 points of the compressor fixing nut using a spanner or a adjustable wrench 11 Remove the welded pipe of compressor inlet and outlet and then remove the compressor Note Recover refrigerant without spreading it in the air n ced E Power receiver Separator 14 Removing the power receiver fixing screw 1 Remove the service panel See Photo 1 2 Remove the top panel See Photo 1 3 Remove 2 front cover panel fixing screws 5 x 12 and remove the front cover panel See Photo 3 1 4 Remove 2 back cover panel fixing screws 5 x 12 and remove the back cover panel 5 Remove the electrical parts box See Photo 3 1 6 Remove 3 valve bed fixing screws 4 x 10 and 4 ball valve and stop valve fixing screws 5 x 16 and then remove the valve bed 7 Remove 3 right side panel fixing screws 5 x 12 in the rear of the unit and then remove the right side panel 8 Recover refrigerant 9 Remove 4 welded pipes of power receiver inlet and outlet 10 Remove 2 receiver leg fixing screws 4 x 10 Compressor fixing nut Note Recover refrigerant without spreading it in the air OCH533A 19 MITSUBISHI ELECTRIC CORPORATION HEAD OFFICE

Part 2 of 2 - MHG Heating

Contents

Download Pdf Manuals

Related Search

Related Contents