Indoor Horizontal Ducted Unit Service Guide
Contents
1. 32 1 10 8 DC FAN MOTOR MOTOR INDOOR CONTROLLER BOARD Check method of DC fan motor fan motor indoor controller circuit board D Notes High voltage is applied to the connecter CNMF for the fan motor Give attention to the service Do not pull out the connector CNMF for the motor with the power supply on It causes trouble of the indoor controller circuit board and fan motor Self check Symptom The indoor fan cannot turn around Check the fuse FUSE on indoor controller board Check the drain pump DP Is the resistance between terminals normal Replace indoor controller board 2 Did the fuse blow Replace fan motor MF V gt Yes gt V Wiring contact check No Contact of fan motor connector CNMF Y Replace drain pump DP Is there no contact failure No gt Jy Yes Power supply check Remove the connector CNMF Measure the voltage in the indoor controller circuit board TEST POINT Voc between 1 and 4 of the fan connector Voc DC310 340V TEST POINT Vcc between 5 and 4 of the fan connector DC15V Y Is the voltage normal Yes gt Replace the fan motor iN Jy Yes OK Check the operation of fan END Replace indoor END controller board V L K Replace indoor controller board Check the opera2. 91 21 8 1 qro edid 8 1 2 87 2 Keep the service space for the maintenance bottom NOTE 1 Use M10 screw for the Suspension bolt field supply which have 2 fans 4 In case of the inlet duct is used remove the air filter Supply with the unit then install the filter field supply at suction side J 42AA models 24 30 36 3 This chart indicates for PEAD 16 7 WIRING DIAGRAM PEAD A24 30 36 42AA TB15 Lo 1 10 CONTROLLER TB4 ee ooo 1 I TO OUTDOOR UNIT 53 9 4 CN105 16 Red Red 9 CN2A 1 ____ Red Red CN20 Rectifier circuit 1 i MEE e Fan motor S UROL AP NOTE 1 Since the outdoor side electric wiring may change be sure to SYMBOL NAME SYMBOL NAME SYMBOL NAME heck th td ae Indoor controller board Indoor controller board Intake air temp Thermistor cnec unit elec wiring or servicing CN2A 0 10V Analog input Switch for mode selection Pipe temp Thermistor liquid 2 Indoor and outdoor connecting wires are made with polarities make CNaL _ Connector Lossnay Switch for capacity code Cond eva temp Thermistor wiring matching terminal numbers S1 92 53 CN32__ Con
3. or 91 Z m 99 e 91 6 2 00 uey sse QL EL EL pue BdIAJES 10 eoeds Joop Sseooy ur uuu 8 L 6 29 N 9 Buluresp snoeuejuods g L L z amp e qro edid 944938 eg 5 eui UOISSIUISUEJ 1 eyouleuxoojq 28 SEL Seb 318 6 s US 8 9 Buidid jue1eBuje l 5 5 10 WEY 8 1 6 0 2 5 ab E 2 2 X x dund ureaq 5 9 3 215 26200 9 201 EIDE Or 5 os edid 8 2 6 862 e E 5 2 je o 9 m 8 52 6 9 7 1 2 28 S youd joq uoisuedsns d E 2 b E NT i o 9 TE bd 4 1 E NEN Y J E E 91 2 01 e m k OO 5 5 w T 2 2 5 4 5 2 JV 5 gt o 55 gt gt x B8 193 4l m x od a a S _ Y 012 vie waar E 1015 91 6 91 6 06 9 ou oq uoisuedsng 8 ejou 8 1 6 28 2 7 9Jou no 91 6 001 2 use1J G 91 1 9 ESL 8 2 2 002
4. 100 0 4011 External static pressure Pa in WG 50 corpus SEPSE exco ule eee ceu e oe Peedi cabs wt I ste il TW musst epatis FED 34 Rated point Mu ee as Oe eee Lo itera gb m Loro eb 0 201 0 45 530 silo obo od os mnc 20 706 PEAD A42AA External static p 25 883 Seb wets od kod eS 30 1059 ates SSS a Airflow rate m8 min cfm Pa 208 230V 60Hz 35 1236 foo be al See Doo bo cle SiS SS ae SS eee She 40 1412 45 1589 250 1 004 ressure 150 200 0 803 150 0 602 100 0 401 External static pressure Pa in WG 50 0 201 10 0 15 530 706 883 30 1059 Airflow rate m3 min cfm 1236 1412 1589 PEAD A24 30 36 42AA Air filter 208 230V 60Hz 15 0 060 A36 42 10 0 040 A24 30 5 0 020 External static pressure Pa in WG 0 0 10 20 30 40 0 353 706 1059 1412 Airflow rate m3 min cfm 5 SOUND PRESSUR
5. nue e mou bee el a 706 PEAD A42AA External static pressure 70Pa 208 230V 60Hz External static pressure Pa in WG 150 0 602 100 0 401 50 0 201 0 1 0 45 20 25 30 35 40 45 530 706 883 1059 1236 1412 1589 T 883 30 1059 Airflow rate m8 min cfm 35 1236 40 1412 45 WR m SS SR ae 9 eee ade i Se Sk ee PEEN ae Sele da c 24 paeje ep m eje s q m mpa fiddle sd eal Ne D j SEURE AEEA ERES Airflow rate m8 min cfm 1589 1589 PEAD A42AA External static pressure 100Pa 208 230V 60Hz 200 0 803 150 Bea rR 4W T 10114 nem er A Limit 4 a rc Pope eS aiias aaea 0 602 eRe hes comu pe Ay pa 4
6. Fig 2 2 Thermistor Intake air 1 Remove the control box cover according to the procedure in section 1 1 Pull out the thermistor holder and thermis B tor C on the control box Fig 3 35 EN Exercise caution when removing heavy parts 3 Drainpan 1 Removing the filter and the bottom plate 1 Push up the tab on the filter and pull out the filter in the direction of the arrow 1 2 Remove the fixing screws on the bottom plate D E to remove it SS 2 R V 2 Removing the drainpan 1 Pull out the drain pan in the direction of the arrow 2 36 Exercise caution when removing heavy parts 4 Thermistor Condenser evaporator Liquid pipe 1 Remove the drain pan according to the proce dure in section 3 2 Removing the Heat exchanger cover 1 Remove the four fixing screws on the heat exchanger cover F to remove it 3 Removing the thermistor 1 Remove the thermistor Bu E B E 2 O O L Thermistor size Liquid pipe e8mm Condenser evaporator 6mm 37 MM Exercise caution when removing heavy parts 5 Fan and fan motor 1 Removing the filter and the bottom plate 1 Push down the tab on the filter and pull out the filter
7. 40 0 35 0 30 0 25 0 20 0 15 0 10 0 70 0 65 0 60 0 55 0 50 0 45 0 40 0 35 0 30 0 25 0 20 0 15 0 10 0 5 0 0 0 Approximate minimum 7 audible limit on 2 continuous noise 63 125 250 500 1k 2k 4k 8k Octave band center frequencies Hz External static pressure 0 60 in WG 150Pa ee Middle NC 60 NC 50 NC 40 NC 30 NC 20 t Approximate minimum audible limit on 22 continuous noise 250 500 1k 2k Octave band center frequencies Hz 20 Octave band pressure level dB 0dB 20yPa Octave band pressure level dB 0dB 20 Octave band pressure level dB 0dB PEAD A36AA 70 0 35 0 30 0 25 0 70 0 65 0 60 0 55 0 50 0 45 0 40 0 35 0 30 0 25 0 20 0 70 0 65 0 60 0 55 0 50 0 P 45 0 40 0 35 0 30 0 25 0 External static pressure 0 14 in WG 35Pa N audible limit 22 continuous noise L Approximate minimum 250 500 1k 2k Octave band center frequencies Hz NC 60 NC 50 NC 40 NC 30 NC 20 External static pressure 0 20 in WG BOPa audible limit
8. 50 m Limit gt 0 201 7 4 1 4 30 _ 0 120 20 pris ee et 10 Ss oS Se PEAD A30AA External stat 0 361 0 321 0 281 0 241 SS aS mme pee Sead ead 20 706 Airflow rate m3 min cfm oS Qo peop Se 25 30 1059 90 7 ic pressure 50Pa 208 230V 60Hz 80 70 60 50 Rated poin 0 201 40 0 161 30 External static pressure Pa in WG 0 120 20 0 080 10 0 040 PEAD A30AA External static pressure 70Pa 208 230V 60Hz 100 706 Airflow rate m3 min cfm 883 1059 0 401 90 0 361 80 dl pede 1 pee ee 0 321 70 Siero eerie Seneca aspe eee eee a 0 281 60 0 241 Siete eRe See RRA EREA PARRA ARRA A AA Se RAR Sa eae 50 0 201 40 Hee hs cede ec Hes eere Asc External static pressure Pa in WG 30 0 161 0 120 20 beste eek ee Ley ee Se Se ee SSS a SaaS Shins m
9. 1412 1589 Airflow rate m3 min cfm PEAD A42AA External static pressure 35Pa 208 230V 60Hz External static pressure Pa in WG 70 0 281 60 0 241 50 0 201 40 0 161 30 0 120 20 0 080 10 0 040 0 45 530 E spl eo dos colens Middle sb seb ede doe Rated point Sek ee a ES tus Bosse n speeds 20 706 PEAD A42AA External static pressure 50Pa 208 230V 60Hz External static pressure Pa in WG 100 0 401 530 25 883 30 1059 Airflow rate m3 min cfm 35 1236 40 1412 45 4 sio cds Lotes mous Sat wie a els Sali coles eles Sie uS eo Loose s sd bs co dons peso eeu Middle Raa PEE PORTE eee eres See hcc aed eee eee BORSE DEVEN ob Ares Sele Pe Shee TORTA bole Sak Fea ue n FoR oe op eae ap ene be ale Se ee
10. 2 PEAD AG6AA Power supply phase cycle voltage 2 64 External static pressure 35 50 70 100 150 0 14 0 20 0 28 0 40 0 60 Sound pressure level 35Pa 0 14 in WG 28 33 38 Low Mid High 50Pa 0 20 in WG 29 34 38 70Pa 0 28 in WG dB A 30 35 39 100Pa 0 40 in WG 31 36 40 150Pa 0 60in WG 34 40 43 in in H in INDOOR UNIT Dimensions Power supply phase cycle voltage Se E 2 1 Circuit Ampacity ABO 2 80 External static pressure 35 50 70 100 150 0 14 0 20 0 28 0 40 0 60 Sound pressure level 35Pa 0 14 in WG 31 36 40 Low Mid High 50Pa 0 20 in WG 33 36 40 70Pa 0 28 in WG 33 37 41 100Pa 0 40 in WG 34 39 42 150Pa 0 60in WG 37 m 45 Dimensions ar A9 88 8 mi mma J J Q2 JJ 250 7 8 2 2 gt oc lt 4 FAN PERFORMANCE AND CORRECTED AIR FLOW PEAD A24AA External stat External static pressure Pa in WG 60 0 241 50 0 201 40 0 161 30 0 120 20 0 080 10 0 040 0 353 ic pressure 35Pa 208 230V 60Hz oes T ee eee ng e E eh AR E SES med Eos der ele m e 5 ose a he exe dee ecc a Rated point High Middle 10 PEAD A24AA External stat External static pr
11. 0 5 0 70 0 65 0 60 0 55 0 50 0 45 0 40 0 35 0 30 0 25 0 20 0 15 0 10 0 5 0 70 0 65 0 60 0 55 0 50 0 p 45 0 40 0 35 0 30 0 25 0 20 0 15 0 10 0 External static pressure 0 14 in WG 35Pa Approximate minimum audible limit on 22 continuous noise NC 60 NC 50 NC 40 NC 30 NC 20 250 500 1k 2k Octave band center frequencies Hz External static pressure 0 20 in WG BOPa wm Middle audible limit on 25 continuous noise Approximate minimum 250 500 1k 2k Octave band center frequencies Hz 1 60 NC 50 NC 40 NC 30 NC 20 External static pressure 0 28 in WG 70Pa Approximate minimum audible limit on 22 continuous noise 250 500 1k 2k Octave band center frequencies Hz 771 NC 60 NC 50 NC 40 NC 30 NC 20 15 20 Octave band pressure level dB OdB 20 Octave band pressure level dB OdB 70 0 65 0 60 0 550 50 0 45 0 40 0 35 0 30 0 25 0 20 0 15 0 10 0 5 0 0 0 70 0 65 0 60 0 55 0 50 0 45 0 40 0 35 0 30 0 25 0 20 0 15 0 10 0
12. 5 0 0 0 External static pressure 0 40 in WG 100Pa E Approximate minimum audible limit on LEID uU 222 continuous noise pc qc c r 5 20 63 125 250 500 1k 2k 4k 8k Octave band center frequencies Hz External static pressure 0 60 in WG 150Pa wm Middle eae ee MEE NIS ee Belo eee See Pee NC 60 NC 50 NC 40 NC 30 1 NC 20 Approximate minimum 7 audible limit on 72 continuous noise 250 500 1k 2k Octave band center frequencies Hz 6 OUTLINES amp DIMENSIONS INDOOR UNIT PEAD A24 30 36 42AA 91 91 lI r I it 5 25525555504 55555 505 d 0605060606060 2 0 EPR KRY 0000000000000000000 5 SOSS KAVANI ISS LI 4 900525002500 191949 64949 649 5 649 55 QP POOR OOOO 52525252505 PK 55595955596 5 5505525555055 05250550555 505552552 SOO 52 5050 05050506060 mr h RARER KKK etti eret et Gi __ 04 000000 5252590 E INT CL 004 eoueuejureui 909S 10 Auedoud uonisod pejurodde au ye 100p sseooe eui OJEW eoeyns 100p Sseooy 8 LT in 002 5597 91 6 22
13. Airflow Up Down button Louver button Operation button To return operation number Ventilation button Built in temperature sensor A Operation button To go to next operation number This message is displayed for approximately 3 minutes when power is supplied to the indoor unit or when the unit is recovering from a power failure NOT AVAILABLE message This message is displayed if an invalid button is pressed to operate a function that the indoor unit does not have If a single remote controller is used to operate multiple indoor units simultaneously that are different types this message will not be displayed as far as any of the indoor units is equipped with the function 3 SPECIFICATION Power supply phase cycle voltage Min Circuit Ampacity External finish Heat exchanger Fan 35 50 70 100 150 0 14 0 20 0 28 0 40 0 60 Operation control amp Thermostat Sound pressure level 35Pa 0 14 in WG 25 28 32 Low Mid High 50Pa 0 20 in WG 25 29 33 70Pa 0 28 in WG 26 30 34 100Pa 0 40 in WG 27 31 35 29 34 38 Dimensions in H INDOOR UNIT Power supply phase cycle voltage External static pressure 35 50 70 100 150 0 14 0 20 0 28 0 40 0 60 Sound pressure level 35Pa 0 14 in WG 25 29 34 Low Mid High 50Pa 0 20 in WG 26 30 34 27 31 35 28 32 36 30 35 39 32 1 1 4 Dimensions in 1100 43 5 16 in 732 28 7 8 mm in 250 9 7 8 kg Ibs 2 5 oc
14. Eod ond cdd zd dee emen oo fe Ne tii 0 0 io 853 1 530 5 PEAD A36AA External static pressure 70Pa 208 230V 60Hz External static pressure Pa in WG 150 0 602 100 0 401 706 52 172 883 30 1059 Airflow rate m3 min cfm 35 1236 4 14 0 12 ledai aa kai Soir 1589 Repone Rodi Middle 4 Pd d pod doa 50 0 201 5 0 Bed a NENNEN CAE 0 10 15 20 25 30 35 40 45 353 530 706 883 1059 1236 1412 1589 Airflow rate m3 min cfm PEAD A36AA External static pressure 100Pa 208 230V 60Hz External static pressure Pa in WG 150 0 602 100 0 401 50 0 201 OE Rated point ae be feel tb ue 01411 0 40 15 20 25 30 35 40 45 353 530 706 883 1059 1236 1412 1589 PEAD A36AA External static pressure 150Pa 208 230V 60Hz External static pressure Pa in WG 200 0 803 150 0 602 100 0 401 50 0 201 Airflow rate m3 min cfm 0 0 49 20 25 30 35 40 45 353 530 706 883 1059 1236
15. MEE 30 0 Sea Say 30 S 250 2522225 a m S I prc m ccc S A B dd UU WS NC 20 eS 15 0 222 Approximate minimum 11001111 1 pa APROXIMA 10 0 r audible limit on E continuous noise 63 125 250 500 1k 2k 4k 8k Octave band center frequencies Hz External static pressure 0 28 in WG 70Pa NC 60 NC 50 NC 40 NC 30 NC 20 L Approximate minimum audible limit on 111 continuous noise 63 125 250 500 1k 2k 4k 8k Octave band center frequencies Hz 12 External static pressure 0 40 in WG 100Pa 40 0 Dmm High am Low wm Middle E Approximate minimum e a PERTH uscs 722 continuous noise peche gode ue c c fi 1 1 1 1 1 1 1 1 1 63 125 250 500 1k 2k 4k Octave band center frequencies Hz External static pressure 0 60 in WG 150Pa Middle Approximate minimum r audible limit on E continuous noise 125 250 500 1k 2k Octave band center frequencies Hz NC 60 NC 50 NC 40 NC 30 NC 20 NC 60 NC 50 NC 40 NC 30 NC 20 20 Octave band p
16. failure 30 C 86 F 4 3kQ unit does not reset normally after three Breaking of wire or contact 40 C 104 F 3 0kQ minutes The unit returns to normal failure of thermistor wiring If you put force on draw or bend the lead wire operation if it has normally reset Defective indoor controller with measuring resistance value of thermistor 2 Constantly detected during cooling board breaking of wire or contact failure can be drying and heating operation detected Short 90 C 194 F or more Check contact failure of connector CN20 on Open 40 C 40 F or less the indoor controller board Refer to 10 5 Turn the power on again and check restart after inserting connector again Check room temperature display on remote controller Replace indoor controller board if there is abnormal difference with actual room temperature Turn the power off and on again to operate after check Pipe temperature Defective thermistor Check resistance value of thermistor thermistor Liquid TH2 characteristics For characteristics refer to P1 above The unit is in three minute resume Contact failure of connector 2 Check contact failure of connector CN44 on prevention mode if short open of CN44 on the indoor controller indoor controller board Refer to 10 5 thermistor is detected Abnormal if the board Insert failure Turn the power on again and check restart unit does not reset normally after three Breaking
17. has been performed refer to the following table to remove the cause Symptom Cue Wired remote controller LED 1 2 PCB in outdoor unit After LED 1 2 are lighted LED 2 is turned For about 2 minutes after power on operation of the For about 2 minutes PLEASE WAIT off then only LED 1 is lighted Correct remote controller is not possible due to system start up id operation Correct operation Connector for the outdoor unit s protection device is not connected Anet about qain Only LED 1 is lighted gt LED 1 2 blink e Reverse or open phase wiring for the outdoor unit s power utes has expired terminal block L1 L2 L3 Display messages do not appear 4 9 jn following power on Incorrect wiring between indoor and outdoor units even when operation switch is Only LED 1 is lighted gt LED 1 2 blinks incorrect polarity of S1 S2 3 twice LED 2 blinks once Remote controller wire short not light up On the wireless remote controller with conditions above following phenomena takes place No signals from the remote controller are accepted OPE lamp is blinking The buzzer makes a short ping sound Note Operation is not possible for about 30 seconds after cancellation of function selection Correct operation 23 For description of each LED LED1 2 3 provided on the indoor controller refer to the following table LED 1 power for microcomputer Indica
18. on 22 continuous noise Approximate minimum 250 500 1k 2k Octave band center frequencies Hz 1 NC 60 NC 50 NC 40 NC 30 NC 20 External static pressure 0 28 in WG 70Pa audible limit on 22 continuous noise Approximate minimum 125 250 500 1k 2k Octave band center frequencies Hz 4k 8k 771 NC 60 NC 50 NC 40 NC 30 NC 20 14 20 Octave band pressure level dB 0dB 20 Octave band pressure level dB 0dB 70 0 70 0 External static pressure 0 40 in WG 100Pa F Approximate minimum audible limit on 22 continuous noise 250 500 1 k 2k Octave band center frequencies Hz External static pressure 0 60 in WG 150Pa Approximate minimum 5 b audible limit on 22 continuous noise 250 500 1 k 2k Octave band center frequencies Hz NC 60 NC 50 NC 40 NC 30 NC 20 NC 60 NC 50 NC 40 NC 30 NC 20 20 Octave band pressure level dB 0dB 20yPa Octave band pressure level dB 0dB 20 Octave band pressure level dB 0dB PEAD A42AA 60 0 55 0 50 0 45 0 40 0 E gt 35 0 30 0 25 0 20 0 15 0 10
19. operation Malfunction of drain pump D Check if drain up machine works D Suspensive abnormality if drain float 2 Defective drain 2 Check drain function switch is detected to be underwater for 1 Clogged drain pump minute and 30 seconds continuously Clogged drain pipe with drain pump on 3 Defective drain float switch 3 Remove drain float switch connector CNAF Turn off compressor and indoor fan Catch of drain float switch or and check if it is short Switch On with the Drain pump is abnormal if the condition malfunction of moving parts moving part of float switch UP or OPEN with above is detected during suspensive cause drain float switch to be the moving part of float switch down abnormality detected under water Switch Replace float switch if it is short with the Constantly detected during drain pump On moving part of float switch down operation 2 Defective indoor controller Replace indoor controller board if it is short board circuited between 9 0 of the drain float switch connector CN4F and abnormality reappears It is not abnormal if there is no problem about the above mentioned O Turn the power off and on again to operate after check 25 Freezing overheating protection is working Freezing protection Cooling mode The unit is in six minute resume prevention mode if pipe lt liquid or condenser evap orator gt temperature stays under 15C 5 F for three minutes after the compressor st
20. to or all units AL wired remote controller 07 wireless remote controller Mode Setting Setting Initial setting Heater control Heater OFF Inlet air temp 2 set temp Heater ON Inlet air temp lt set temp 4 5 F 2 5 C The fan will stop and the heater will turn off when DEFROST or ERROR is displayed Set temp Set temp 1 8 F 1 C Set temp 4 5 F 2 5 Heater output OFF Heater OFF Inlet air temp gt set temp Heater ON Inlet air temp lt set temp 1 8 F 2 5 C The fan will drive and the heater will turn on when DEFROST or ERROR is displayed Set temp Set temp 1 8 F 2 5 C Heater output Refer to the Installation Manual for function settings 18 1 9 2 FAN CONTROL By setting the Mode No 23 in the Function Table in section 9 1 to 2 and using CN4Y on the optional parts PAC YU25HT the following patterns of fan control will become possible when DEFROST or ERROR is displayed Fan control patterns when DEFROST or ERROR is displayed 2 505 Heater is installed in the duct No heater is installed in the duct Use of CN4Y PAC YU25HT Heater is off Fan ON 1 Fan OFF Heater is on Fan ON 1 Fan OFF A If a heater is installed in the duct do not use CN4Y By doing so the fan will turn off when the heater is on which may result in fire 1 Fan speed setting Mode no Setting Initial setting Heatin
21. unit supply terminal block L N or Ls N When AC 208 230V is not detected Check the power wiring to outdoor unit and the breaker When AC 208 230V is detected Check below Defective outdoor controller circuit board Check the voltage between outdoor terminal block 51 and S2 When AC 208 230V is not detected Check the fuse on outdoor controller circuit board Check the wiring connection When AC 208 230V is detected Check below Power supply of 208 230V is not supplied to indoor Check the voltage between indoor terminal unit block S1 and S2 When AC 208 230V is not detected Check indoor outdoor unit connecting wire for mis wiring When AC 208 230V is detected Check below Defective indoor controller board Check the fuse on indoor controller board Check the wiring connection If no problem are found indoor controller board is defective 2 LED2 on indoor controller board WhenLED1 on indoor controller board is also blinking Check indoor outdoor unit connecting wire is blinking Connection failure of indoor outdoor unit connecting for connection failure wire e When LED1 is lit Mis wiring of remote controller wires D Check the connection of remote con Under twin triple indoor unit system 2 or more indoor troller wires in case of twin triple indoor units are wired together unit system When 2 or more indoor units are wired in one refrigerant system conne
22. A basic connection method is shown below Indoor unit Remote control board Relay circuit Adapter control board ei cem EE B oe ee E I Ir 2 o E 2 EE d T X White 1 Electric Heater or panel 3 heater applicable only when a panel 1 _ _ _ _ _ _ _ _ _ _ _ _ iheBerisconneded _ _ Preparations in the field Maximum cable length is 10 m 32ft For relay X use the specifications given below Operation coil Rated voltage 12VDC Power consumption 0 9W or less Use the diode that is recommended by the relay manufacturer at both ends of the relay coil The length of the electrical wiring for the PAC YU25HT is 2 meters 6 1 2 ft To extend this length use sheathed 2 core cable Control cable type CVV CVS CPEV or equivalent Cable size 0 5 mm 1 25 mm 16 to 22 AWG Don t extend the cable more than 10 meters 32ft Recommended circuit FS1 H1 R 0 uw 1 phase S power supply 88H FS2 mE 208V 230V 60Hz D E31 Wiring diagram D Fun n4 FS1 2 Thermal fuse 88H FS2 H1 H2 Heater 88H D 26H Overheat protection thermostat ontrol boar 88H Electromagnetic contactor CN24 4 Wiring restrictions Keep the length of the cable connecting to t
23. Be eee doe hee eee Soe pe epee Soa bebe Sec Sea eS SS e ecd Re 50 0 201 dcos Gods Heeb el Ss Ste we se ea He ea eoe dbi ide eer Ene 0 10 353 15 20 706 Airflow rate m3 min cfm 1059 PEAD A36AA External static pressure 35Pa 208 230V 60Hz External static pressure Pa in WG 70 0 281 60 0 241 50 0 201 40 0 161 30 0 120 20 0 080 10 0 040 0 uto M eol coe e MARS SASE et Eine ngos cete e e cs Gs ee cas ef ead Isobe eps deo ob eb ee am sees he eds High ee ae es 0 49 1 353 530 5 20 706 PEAD A36AA External static p External static pressure Pa in WG 100 25 883 os 30 1059 Airflow rate m3 min cfm ressure 50Pa 208 230V 60Hz 35 4 1236 14 0 45 1589 12 a ee ee n 90 0 361 5 1 80 0 321 70 0 281 5 iit 60 0 241 50 0 201 40 0 161 30 0 120 20 0 080 10 LN CREE Lape o NS N je bode te oe PESE DN Rated PURUS
24. Changes for the Better MITSUBISHI ELECTRIC SPLIT TYPE HEAT PUMP AIR CONDITIONERS 2009 SERVICE MANUAL Ceiling Concealed lt indoor unit gt Service ref NOTE Models Thi describ PEAD A24AA PEAD A30AA units PEAD A36AA PEAD A42AA CONTENTS 1 SAFETY 2 2 PART NAMES AND FUNCTIONS 3 5 eure 2 E 4 FAN PERFORMANCE AND CORRECTED AIR FLOW 7 5 SOUND PRESSURE LEVELS 12 6 OUTLINES DIMENSIONS 16 7 WIRING DIAGRAM 17 8 REFRIGERANT SYSTEM DIAGRAM 18 HEATER CONTROL 56e 18 10 TROUBLESHOOTING 241 11 DISASSEMBLY PROCEDURE 35 eae S 1 SAFETY PRECAUTION 1 1 ALWAYS OBSERVE FOR SAFETY Before obtaining access to terminal all supply circuits must be disconnected 1 2 CAUTIONS RELATED TO NEW REFRIGERANT Cautions for units utilising refrigerant R410A Use new refrigerant pipes In case of using the existing pipes for R22 be careful with the followings For A36 and A42 be sure to perform replacement oper ation before test run Change flare nut to the one provided with this product Use a newly flared pipe Avoid using thin pipes Make sure that the inside and outside of refrige rant piping is clean and it ha
25. Display messages do not 2 Only LED 1 is lighted gt e Incorrect wiring between indoor and outdoor appear even when operation LED 1 blinks twice units incorrect polarity of 51 S2 53 switch is turned ON operation LED 2 blinks once Remote controller wire short lamp does not light up On the wireless remote controller with condition above following phenomena take place No signals from the remote controller are accepted Operation lamp is blinking The buzzer makes a short piping sound Note Operation is not possible for about 30 seconds after cancellation of function selection Correct operation For description of each LED LED1 2 3 provided on the indoor controller refer to the following table LED1 power for microcomputer Indicates whether control power is supplied Make sure that this LED is always lit LED2 power for remote controller Indicates whether power is supplied to the remote controller This LED lights only in the case of the indoor unit which is connected to the outdoor unit refrigerant address O LED3 communication between indoor and Indicates state of communication between the indoor and outdoor units outdoor units Make sure that this LED is always blinking Wireless remote controller 1 Turn on the power to the unit at least 12 hours before the test run 2 Press the TEST RUN button 9 twice continuously Start this operation from the status of remote controller display tu
26. E LEVELS 5 1 Sound pressure level Ceiling concealed 5 2 NC curves PEAD A24AA 20yPa Octave band pressure level dB 0348 20 Octave band pressure level dB 048 20 Octave band pressure level dB 048 70 0 65 0 60 0 55 0 50 0 45 0 40 0 35 0 30 0 25 0 20 0 15 0 10 0 70 0 65 0 60 0 55 0 50 0 45 0 40 0 35 0 30 0 25 0 20 0 15 0 10 0 5 0 70 0 65 0 60 0 55 0 50 0 45 0 40 0 E 35 0 30 0 25 0 20 0 15 0 10 0 Aux duct Measurement location External static pressure 0 14 in WG 35Pa 70 0 111 High Middle 65 0 60 0 NC 60 5 05 55 0 X m 50 0 S 50 t 45 0 400 NC 40 o 5 35 0 o o o 30 0 NC 30 E S 250 o 5 20 0 20 15 0 Approximate minimum E oU 10 0 r audible limit on L continuous noise 5 0 0 0 63 125 250 500 1k 2k 4k 8k Octave band center frequencies Hz External static pressure 0 20 in WG 50Pa e Middle 2055 65 0 60 0 60 5 05 55 0 X m 50 0 8 50 Z m 45 0 S gt NC 40 o 5 35 0 o EE E 22225 BEES
27. RY mode Operation varies Temperature Setting Shows the target temperature according to model The indicator goes off in 1 hour when the airflow direction also changes Operation Section Temperature setting buttons Down CA Up Timer Menu button Monitor Set button as MITSUBISHI ELECTRIC Mode button Return button TEMP IO 638 quM BACK MONITOR SET Timer On Off button Set Day button Set Time buttons Opening the lid Note PLEASE WAIT message Ilil ON AFTER LILI ERROR CODE GNC all x a 5 A ONLY1Hr 4 ON OFF Timer indicators The indicator comes on if the corre sponding timer is set Fan Speed indicator Shows the selected fan speed AFTER FUERON WEEKLY SIMPLE AUTO OFF 38 Room Temperature display Shows the room temperature The room temperature display range is 8 39 C The display blinks if the temperature is less than 8 C or 39 C or more Appears when the unit is running in Ventilation mode Louver display Indicates the action of the swing louver Does not appear if the louver is not running Power On indicator Indicates that the power is on ON OFF button Fan Speed button Filter button lt Enter gt button DoNorr Check button Clear button hal N FILTER
28. arted Abnormal if it stays under 15 5 for three minutes again within 16 minutes after six minute resume prevention mode 2 Overheating protection Heating mode The units is in six minute resume prevention mode if pipe Liquid or con denser evaporator temperature is detected as over 70 C 158 F after the compressor started Abnormal if the temperature of over 70 C 158 F is detected again within 10 minutes after six minute resume prevention mode Pipe temperature Cooling mode Detected as abnormal when the pipe tem perature is not in the cooling range 3 min utes after compressor start and 6 minutes after the liquid or condenser evaporator pipe is out of cooling range Note 1 It takes at least 9 minutes to detect Note 2 Abnormality P8 is not detected in drying mode Cooling range 3 deg 5 4 TH TH1 TH Lower temperature between liquid pipe temperature TH2 and con denser evaporator temperature TH5 TH1 Intake temperature Heating mode When 10 seconds have passed after the compressor starts operation and the hot adjustment mode has finished the unit is detected as abnormal when condenser evaporator pipe temperature is not in heating range within 20 minutes Note 3 It takes at least 27 minutes to detect abnormality Note 4 It excludes the period of defrosting Detection restarts when defrost ing mode is over Heating range deg C 5 4deg F TH5 TH1 Cool
29. board CNXB2 Connect to the indoor controller board CNXC2 Connect to the indoor controller board CNXA1 Connect to the indoor power board CNXB1 Connect to the indoor power board CNXC1 Connect to the indoor power board gt 10 6 TROUBLE CRITERION OF MAIN PARTS PEAD A24AA PEAD A30AA PEAD A36AA PEAD A42AA Part name Check method and criterion Hoom temperature Measure the resistance with a tester thermistor Part temperature 10 C 50 F 30 C 86 F TH1 Pipe temperature thermistor liquid 4 3kQ 9 6kQ Opened or short circuited TH2 Condenser evaporator temperature thermistor TH5 Wiring diagram Ll Power device driver ____ 10 7 Thermistor lt Thermistor Characteristic graph gt for Room temperature thermistor TH1 lower temperature Pipe temperature thermistor TH2 Condenser evaporator temperature thermistor TH5 lt Thermistor for lower temperature gt Thermistor Ro 15kQ 3 Fixed number of B 3480kQ 2 4 odd 1 2 3 t 273 0 C 15kQ 10 C 9 6kQ 20 C 6 3kQ 25 C 5 2kQ 0720 10 0 10 20 30 40 50 0 30 4 3kQ 4 14 32 50 68 86 104122 40 104 F 3 0 0 Temperature Resistance KQ Rt 15exp 3480
30. ct remote controller wires to one of 2 Refrigerant address for outdoor unit is wrong or not those units set 2 Check the setting of refrigerant address Under grouping control system there are some units in case of grouping control system whose refrigerant address is O If there are some units whose refrigerant addresses are in one group set one of the units to O using SW1 3 6 on outdoor Short cut of remote controller wires controller circuit board Defective remote controller Remove remote controller wires and check LED2 on indoor controller board e When LED is blinking check the short cut of remote controller wires e When LED is lit connect remote controller wires again and if LED2 is blinking remote controller is defective if LED2 is lit connection failure of remote controller terminal block etc has returned to normal 29 gt 10 5 TEST POINT DIAGRAM 10 5 1 Power supply board PEAD A24AA PEAD A30AA PEAD A36AA PEAD A42AA BS08S P 7 MD 0390 001 2 06916 KE95B258B He B x a Ll E dl A e J b d D C b o olg ok od LL H 9 2 a 3 mmo Oo 0000 CNXB1 CNXC1 1 PC51 C25 1 1 30 CND Power supply voltage 208 230VAC CNMF Fan motor output 1 4 310 340 VDC 5 4 15 6 4 0 6 5 VDC 7 4 Stop or 15 VDC 7 5 VDC 0 15
31. er evaporator temperature with room temperature display on remote controller and outdoor controller circuit board Pipe liquid or condenser evaporator temperature display is indicated by liquid or condenser setting SW2 of outdoor controller circuit evaporator thermistor board as follows Defective refrigerant circuit Conduct temperature check with outdoor Converse connection of controller circuit board after connecting extension pipe on plural units V A Control Service Tool PAC SK52ST connection Converse wiring of indoor outdoor unit connecting wire on plural units connection Defective detection of indoor room temperature and pipe condenser evaporator temperature thermistor Stop valve is not opened completely Check converse connection of extension pipe or converse wiring of indoor outdoor unit connecting wire 26 Abnormality of pipe temperature ther D Defective thermistor D G Check resistance value of thermistor mistor Condenser Evaporator TH5 characteristics For characteristics refer to P1 above D The unit is in three minute resume pro Contact failure of connector 2 Check contact failure of connector CN44 tection mode if short open of thermistor CN44 on the indoor controller on the indoor controller board is detected Abnormal if the unit does board Insert failure Refer to 10 5 not get back to normal within three min G Breaking of wire or co
32. erant recovery equipment 2 PART NAMES AND FUNCTIONS Indoor Unit Air intake sucks the air inside the room into the unit Air outlet In case of rear inlet In case of bottom inlet e Wired remote controller Display Section Day of Week Shows the current day of the week For purposes of this explanation all parts of the display are shown as lit During actual operation only the relevant items will be lit Identifies the current operation Shows the operating mode etc Multilanguage display is available Time Timer Display Shows the current time unless the simple or Auto Off timer is set If the simple or Auto Off timer is set the time to be switched off is shown Sensor indication Displayed when the remote controller sensor is used Locked indicator Indicates that remote controller but tons have been locked Clean The Filter indicator To be displayed on when it is time to clean the filter TIME SUN_MON TUE_WED_THU FRI SAT TIMER 1181 E N Centrally Controlled indicator Indicates that operation from the remote controller has been prohib ited by a master controller Up Down Air Direction indica tor The indicator N shows the direc tion of the outcoming airflow One Hour Only indicator Timer is Off indicator Indicates that the timer is off Displayed if the airflow is set to low or downward during COOL or D
33. essure Pa in WG 70 0 281 60 0 241 50 0 201 40 0 161 30 0 120 20 0 080 F m a 4 Low 15 530 ii Viel 20 706 Airflow m3 min cfm 883 25 pressure 50Pa 208 230V 60Hz re EP ME EIS NEUES d u4acc 4 crb cBp Middle N Hoe ea neces 10 0 040 0 0 49 15 20 25 353 530 706 883 PEAD A24AA External static pressure 70Pa 208 230V 60Hz External static pressure Pa in WG 90 0 361 80 0 321 70 0 281 60 0 241 50 0 201 40 0 161 30 0 120 20 0 080 10 0 040 Airflow rate m3 min cfm EG eee eee mosque cen n E Bode ues Middle Sap m bem T Kc rn SSSR qe esc pee eon F r i 4 1 2 24 pe Sep Se eee See 20 706 Airf
34. g Thermo OFF DEFROST or ERROR Fan control STOP Remote controller setting Remote controller setting Remote controller setting Refer to the Installation Manual for function settings 9 3 PAC YU25HT OPTIONAL PARTS INSTALLATION The following section describes installation of the External Heater Adapter that connects to PEAD A AA series indoor unit This products is the special wiring parts to drive an electric heater with the air conditioner 1 Parts list Check that the following parts are included in the package 1 External output cable with a yellow connector 2 in total Two types of cables with different connectors are included 2 Panel heater 3 in total White 1 Green 2 2 types 2 Connection to the indoor unit Use the cables that fit the connectors on the indoor unit control board 1 External output cable with a yellow connector This cable is used to connect a relay circuit for an interlocked operation with either an electric or a panel heater Connect the cable to CN24 on the indoor unit control board 2 Panel heater connector with a white connector This connector is used to perform an interlocked operation with a panel heater Depending on the indoor unit control board specification connect the cable to CN4Y as appropriate Image CN4Y for FAN control gt PAC YU25HT 19 3 Locally procured wiring
35. he circuit board of the indoor unit shorter than 10 meters 32ft Longer than 10 meters 32ft could cause improper operation Use a transit relay when extending wiring such as remote wiring 20 10 TROUBLESHOOTING 10 1 CAUTIONS ON TROUBLESHOOTING 1 Before troubleshooting check the followings Check the power supply voltage Check the indoor outdoor connecting wire for mis wiring 2 Take care the followings during servicing Before servicing the air conditioner be sure to turn off the remote controller first to stop the main unit and then turn off the breaker When removing the indoor controller board hold the edge of the board with care NOT to apply stress on the components When connecting or disconnecting the connectors hold the housing of the connector DO NOT pull the lead wires Lead wires Housing point 10 2 SELF CHECK FUNCTION Wired remote controller 1 Turn on the power 2 Press the CHECK button twice 3 Set refrigerant address with TEMP button if system control is used 4 Press the ON OFF button to stop the self check 9 CHECK button Indoor Unit s Refrigerant address TEMP button IC Indoor unit OC Outdoor unit Check code Indoor Unit No For description of each check code refer to the following table P9 Pipe TH5 sensor error S O Pe 7 jFreezmg Overheatingprotec
36. in the direction of the arrow 1 2 Remove the fixing screws on the bottom plate J to remove it NS Fig 8 2 Removing the fan casing bottom half 1 Squeeze the tabs on the fan casing to remove it in the direction of arrow 2 3 Removing the motor cable 1 Remove the motor cable threw the rubber bush 4 Removing the fan motor and the Sirocco fan 1 Remove the two motor fixing screws to remove the motor and the Sirocco fan in the direction of arrow 3 2 Remove the four fan case fixing screws to take the top half of the fan casing off Exercise caution when removing heavy parts 6 Heat exchanger 1 Remove the drain pan according to the proce dure in section 3 TB O S O O O gt O c O X gt Er CN c O o 2 o gt O O E 2 co M 5 gt O O 2s wq gt gt gt 4 Removing the Heat exchanger 1 Remove the fixing screws on the heat L to remove it exchanger Fig 13 39 Mir SLIM s MITSUBISHI ELECTRIC CORPORATION New publication effec
37. ing or drying mode Clogged filter reduced airflow Short cycle of air path Low load low temperature operation beyond the tolerance range Defective indoor fan motor Fan motor is defective Indoor controller board is defective Cooling or drying mode Check clogging of the filter 2 Remove shields Refer to 10 8 DC Fan motor FAN MOTOR INDOOR CONTROLLER BOARD Check outdoor fan motor Check operating condition of refrigerant circuit Defective outdoor fan control amp Overcharge of refrigerant Defective refrigerant circuit clogs Heating mode Clogged filter reduced airflow Short cycle of air path Over load high temperature operation beyond the tolerance range Defective indoor fan motor Fan motor is defective Indoor controller board is defective Heating mode D Check clogs of the filter Remove shields Refer to 10 8 DC Fan motor FAN MOTOR INDOOR CONTROLLER BOARD Check outdoor fan motor 5 Check operating condition of refrigerant circuit Defective outdoor fan control Overcharge of refrigerant Defective refrigerant circuit clogs Bypass circuit of outdoor unit is defective Slight temperature difference between indoor room temperature and pipe liquid or condenser evaporator temperature thermistor e Shortage of refrigerant Disconnected holder of pipe 0 40 Check pipe liquid or condens
38. low rate m3 min cfm 25 883 30 1059 30 1059 30 1059 PEAD A24AA External static External static pressure Pa in WG 150 pressure 100Pa 208 230V 60Hz mo 7 7 iia EE Dac eae mE AED ud E uM ONE dr BA Ba ub M uu M ME b beer sod tod M A D Dui gu uv uc EMEN 455 NEM EET TNNT 06 Rated point 100 2 0 401 SE gt 2 pee im RETO PU C 1211 lt lt Ecco lle Sic sem Ene A domm Ree ETTTEG tor ix E a E ME ee T S Middle 227 r 0 201 JA AN Low 0 0 10 15 20 25 30 353 530 706 883 1059 PEAD A24AA External static External static pressure Pa in WG 200 0 803 150 0 602 100 0 401 50 0 201 pressure 150Pa 208 230V 60Hz Airflow rate m3 min cfm T4 706 Airflow rate m3 min cfm 1059 PEAD A30AA ic pressure 35Pa 208 230V 60Hz External stat 70 0 281 60 cep mA HORE dasqa tepant 0 241 External static pressure Pa in WG 0 161 0 080 0 040 40 Pe
39. nector Remote switch Switch for model selection AC reactor Power factor improvement 3 Symbols used in wiring diagram above are terminal block CN41 Connector HA terminal A Switch for model selection Float switch D connector CN51 _ Connector Centrally control Connector emergency operation Terminal block CNo0 Connector Wireless B Power supply board Indoor outdoor connecting line 4 Use copper supply wire CN105 Connector IT terminal F01 Fuse AC250V 6 3A Terminal block HAN LED1 LED Power supply 21801 02 Varistor Remote controller transmission line LED2 LED Remote controller supply DSA Arrester LED3 LED Transmission indoor outdoor X01 Aux relay X10 Aux relay 17 REFRIGERANT SYSTEM DIAGRAM PEAD A24 30 36 42AA Strainer 50 Heat exchanger Refrigerant GAS pipe connection Flare lt Refrigerant flow in cooling Refrigerant flow in heating Refrigerant LIQUID pipe connection Thermistor TH5 Cond Eva temperature L r i Flare oO Thermistor TH2 Thermistor TH1 Pipe temperature Liquid Room temperature Strainer 50 Distributor with strainer 50 9 HEATER CONTROL 9 1 CONTROL SPECIFICATIONS AND FUNCTION SETTING Table 1 shows how the field installed heater is controlled Select the desired pattern in the table below and set the Function on the indoor units as shown in Table 1 Table 1 Function table Select unit numbers 01
40. nnecting indoor units Abnormal if sub remote controller could on the outdoor controller circuit max 16units not receive for any signal for two min board number of connecting remote utes Error code EO 9 Mis wiring of remote controller troller max 2units Defective transmitting receiving Abnormal if indoor controller board can circuit of remote controller When it is not the above mentioned problem of not receive normally any data from Defective transmitting receiving 0 09 EO remote controller board or from other circuit of indoor controller board Diagnose remote controllers or indoor controller board for three minutes of refrigerant address 0 When RC is displayed E4 Error code E4 Noise has entered into the Remote controllers have no problem 9 Indoor controller board cannot receive transmission wire of remote Turn the power off and on again to check If abnormality generates again replace ny signal from remot ntroller for tw any signal from remote controller fo controller indoor controller board minutes Error code E4 b When RC NG is displayed Replace remote controller When RC is displayed d When ERC 00 06 is displayed c d Noise may be causing abnormality If the unit is not normal after replacing indoor controller board in group control indoor controller board of address 0 may be abnormal Remote controller transmis
41. ntact Turn the power on and check restart after utes The unit returns to normal opera failure of thermistor wiring Inserting connector again aes rate in test Operate es run mode check Constantly detected during cooling dry 90 C 194 F or more or If pipe lt condenser evaporator gt tempera ing and heating operation except 40 C 40 F or less caused by ture is extremely low in cooling mode or defrosting defective refrigerant circuit high in heating mode refrigerant circuit Short 90 C 194 F or more 5 Defective indoor controller may have defect Open 40 C 40 F or less board When no problems are found 0 4 above replace the indoor unit control board Remote controller transmission Contact failure at transmission Check disconnection or looseness of indoor error EO signal receiving error E4 wire of remote controller unit or transmission wire of remote controller D Abnormal if main or sub remote con 2 All remote controllers are set Set one of the remote controllers main troller can not receive normally any as sub remote controller In If there is no problem with the action above transmission from indoor unit of refriger this case EO is displayed on Check SIME of remige ant address for three minutes remote controller and E4 is 1 2 rer ce o ar LED EDI LEDA e The number of co
42. of wire or contact after inserting connector again minutes The unit returns to normal failure of thermistor wiring Check pipe liquid temperature with remote operation if it has normally reset Defective refrigerant circuit is controller in test run mode If pipe liquid 2 Constantly detected during cooling causing thermistor temperature temperature is extremely low in cooling drying and heating except defrosting of 90 C 194 F or more or mode or high in heating mode refrigerant operation 40 C 40 F or less circuit may have defective Short 90 C 194 or more 5 Defective indoor controller board Check pipe liquid temperature with remote Open 40 C 40 F or less controller in test run mode If there is extreme difference with actual pipe liquid temperature replace indoor controller board Turn the power off and on again to operate after check Contact failure of drain float switch CN4F Contact failure of connector D Check contact failure of float switch connec D Extract when the connector of drain float Insert failure tor switch is disconnected Turn the power on again and check after of connector is not inserting connector again short circuited 9 Defective indoor controller Operate with connector CN4F short circuited Constantly detected during operation board Replace indoor controller board if abnormali ty reappears Drain overflow protection
43. ph se 0 080 10 M Bob SSeS Sete eS pee Bee a E SE Se ee ee 0 040 0 0 10 353 20 2 706 Airflow rate m3 min cfm PEAD A30AA External static pressure 100Pa 208 230V 60Hz 150 r r r wea y We cp ue a Eod C i i i i 47 x EXE ak ME ae m E SC oe a E TUE D hel A 511 2213 nated pani amp 0 401 od uU E i i i i 7 i g ho su NAT TNT M MN 2 DERE EF QE UU MEN QE DUE M KE 5 NOM ONE NE NN 2 24 4 0 2 S m i i 02 aa a g a 5 2 S 50 di 10 201 POE Low ee ee 0 0 19 15 20 25 30 353 530 706 883 1059 PEAD A30AA External static p 200 0 803 150 0 602 Airflow rate m3 min cfm ressure 150Pa 208 230V 60Hz eu n ae e dune Rated P epe Ee cael P bue hes eher Rt ee Rt pue noscere pou es lese See 100 0 401 External static pressure Pa in WG ET oS ae So oss
44. pulse Drain up mechanism output 200VAC CNXA1 Connect to the indoor controller board CNXB1 Connect to the indoor controller board CNXC1 Connect to the indoor controller board CNXA2 Connect to the indoor power board CNXB2 Connect to the indoor power board CNXC2 Connect to the indoor power board 1 Veg Voltage on the side of PC51 and C25 Same with the voltage between 7 and 4 of CNMF Vcc Voltage between the C25 pins 15 VDC Same with the voltage between 5 and 4 of CNMF Vsp Voltage between the C53 pins OVDC with the fan stopped 1 6 5VDC with the fan in operation Same with the voltage between 6 and 4 of CNMF E 10 5 2 Indoor controller board PEAD A24AA PEAD A30AA PEAD A36AA PEAD A42AA 217 R412 BU 525 is i Resa ieee co 8 085 cat 2 cA p Ep CN2L 31 SWE Emergency operation SW1 Model selection SW2 Capacity setting CN32 Remote start stop adapter CN22 For MA remote controller cable con nection 10 13 VDC Between 1 and 3 CN51 Centralized control CN41 JAMA standard HA terminal A CN44 Thermistor liquid condenser evaporator temperature CN4F Float thermistor CN20 Thermistor Inlet temperature CN24 Heater control 12VDC CN4Y For fan control Indoor outdoor transmission 0 24VDC CN90 Wireless remote controller CNXA2 Connect to the indoor controller
45. r c When E3 or ERC 00 66 15 displayed noise may be causing abnormality 27 Indoor outdoor unit communication D Contact failure short circuit or Check LED display on the outdoor control cir error Signal receiving error mis wiring converse wiring of cuit board Connect A control service tool D Abnormal if indoor controller board indoor outdoor unit connecting 5 525 cannot receive any signal normally for wire Refer to EA EC item if LED displays EA EC six minutes after turning the power on 4 Check disconnection or looseness of indoor Abnormal if indoor controller board Defective transmitting receiving outdoor unit connecting wire of indoor unit or cannot receive any signal normally for circuit of indoor controller board outdoor unit three minutes Defective transmitting receiving Check all the units in case of twin triple E6 Consider the unit as abnormal under the circuit of indoor controller board indoor unit system following condition When two or more Noise has entered into indoor Turn the power off and on again to check indoor units are connected to an outdoor unit connecting wire If abnormality generates again replace outdoor unit indoor controller board indoor controller board or outdoor cannot receive a signal for three minutes controller circuit board from outdoor controller circuit board a Other indoor controller board may have signal which allows outdoor con
46. re When wire for mis wiring a Pipe lt liquid gt temperature inlet tem connected with multiple units perature lt 10 C for 30 minutes b When drain float switch is detected to Detection failure of the indoor GCheck room temperature display on remote be soaked in the water for 15 minutes unit inlet pipe lt liquid gt thermis controller and indoor pipe lt liquid gt tempera or more tor ture Refer to the countermeasure on P2 When drain float switch is detected to be NOT soaked in the water each Drain pump failure Check if drain up machine works counting of a and b is cleared amp Drainage failure When this error is detected the error Clogged drain pump Check drain function will not be reset until the main power is Clogged drain pipe PA reset 2500 Drain float switch failure Check drain float switch Refer to the coun Drain float switch is detected termeasure on P4 and P5 to be soaked in the water ON status due to the operation failure of the moving parts Contact failure of drain float switch connector Loose connector 28 10 4 TROUBLESHOOTING BY INFERIOR PHENOMENA Note Refer to the manual of outdoor unit for the detail of remote controller Phenomena Cause Countermeasure 1 LED2 on indoor controller board When LED1 on indoor controller board is also off is off Power supply of rated voltage is not supplied to out Check the voltage of outdoor power door
47. ressure level dB 0dB 20yPa Octave band pressure level dB 0dB 20 Octave band pressure level dB 0dB PEAD A30AA 10 0 5 0 70 0 65 0 60 0 55 0 50 0 p 45 0 40 0 35 0 30 0 25 0 20 0 15 0 10 0 5 0 0 0 70 0 65 0 60 0 55 0 50 0 p 45 0 40 0 35 0 30 0 25 0 20 0 15 0 10 0 5 0 0 0 External static pressure 0 14 in WG 35Pa Approximate minimum audible limit on 22 continuous noise 250 500 1k 2k Octave band center frequencies Hz NC 60 NC 50 NC 40 NC 30 NC 20 External static pressure 0 20 in WG 50Pa 222 High wm Middle audible limit on 25 continuous noise Approximate minimum 250 500 1k 2k Octave band center frequencies Hz External static pressure 0 28 in WG 70Pa Ree ees eee rcr ee H igh scs Approximate minimum audible limit on 22 continuous noise 250 500 1k 2k Octave band center frequencies Hz NC 60 13 20 Octave band pressure level dB OdB 20yPa Octave band pressure level dB OdB 70 0 65 0 60 0 550 50 0 45 0 External static pressure 0 40 in WG 100Pa
48. rned off and current operation mode are displayed 3 Press the MODE button B to activate COOL mode then check whether cool air is blown out from the unit 4 Press the MODE button to activate HEAT mode then check whether warm air is blown out from the unit b Press the FAN button and check whether fan speed changes 6 7 Press the VANE button and check whether the auto vane operates properly Press the ON OFF button to stop the test run Note Point the remote controller towards the indoor unit receiver while following steps 2 to 7 t is not possible to run the in FAN DRY or AUTO mode 22 Output pattern A Errors detected by indoor unit Wired remote Wireless remote controller controller Beeper sounds OPERATION Symptom Remark INDICATOR lamp flashes Check code Number of times Pipe Liquid or 2 phase pipe sensor error EMEN 8 E amp E7 mdoorowdooruntcommunalonemor 8 P Dempmper 8 Pe Reeigvemesingsseguadopemon 7 EE Gommuncalonemorbeweenindorandoudoorns _ PB se RemdecnwolrspmieceWngemr _ indoor unit contra system error memory eror eo 2 No corresponding Output pattern Errors detected by unit other than indoor unit outdoor unit etc Beeper sounds OPERATION INDICATOR Symptom lamp flashes Number of times Indoor outdoor
49. ronic refrigerant charging scale Handle tools with care If dirt dust or moisture enters into refrigerant cycle that can cause deterioration of refrigerant oil or malfunction of com pressor Do not use a charging cylinder If a charging cylinder is used the composition of refrigera nt will change and the efficiency will be lowered Ventilate the room if refrigerant leaks during operation If refrigerant comes into contact with a flame poisonous gases will be released 1 Perform service after recovering the refrigerant left in unit completely 2 Do not release refrigerant in the air 3 After completing service charge the cycle with specified amount of refrigerant 4 When performing service install a filter drier simultaneously Be sure to use a filter drier for new refrigerant 2 Additional refrigerant charge When charging directly from cylinder Check that cylinder for R410A on the market is syphon type Charging should be performed with the cylinder of syphon stood vertically Refrigerant is charged from liquid phase 3 Service tools Use the below service tools as exclusive tools for R410A refrigerant Gauge manifold Only for R410A Use the existing fitting specifications UNF 1 2 Use high tension side pressure of 5 3MPa G or over Charge hose Only for R410A G Refrigerant cylinder Only for R410A Top of cylinder Pink Cylinder with syphon Refrig
50. s no contamination such as sulfur hazardous for use oxides dirt shaving particles etc In addition use pipes with specified thickness Contamination inside refrigerant piping can cause deterio ration of refrigerant oil etc Store the piping to be used indoors during installation and both ends of the piping sealed until just before brazing Leave elbow joints etc in their packaging If dirt dust or moisture enters into refrigerant cycle that can cause deterioration of refrigerant oil or malfunction of com pressor Use ester oil ether oil or alkylbenzene oil small amount as the refrigerant oil applied to flares and flange connections If large amount of mineral oil enters that can cause deterio ration of refrigerant oil etc Charge refrigerant from liquid phase of gas cylinder If the refrigerant is charged from gas phase composition change may occur in refrigerant and the efficiency will be lowered 1 Cautions for service Do not use refrigerant other than R410A If other refrigerant R22 etc is used chlorine in refrige rant can cause deterioration of refrigerant oil etc Use a vacuum pump with a reverse flow check valve Vacuum pump oil may flow back into refrigerant cycle and that can cause deterioration of refrigerant oil etc Use the following tools specifically designed for use with R410A refrigerant The following tools are necessary to use R410A refrigerant Torque wrench Elect
51. sion error E3 signal receiving error E5 D Two remote controller are set Set a remote controller to main and the 0 Abnormal if remote controller could not as main other to sub find blank of transmission path for six In case of 2 remote con seconds and could not transmit Error code E3 Hon Remote controller receives transmitted Remote controller is connected 2 Remote controller is connected with only one data at the same time compares the with two indoor units or more indoor unit data and when detecting it judges Repetition of refrigerant The address changes to a separate setting different data to be abnormal 30 address continuous times Error code E3 Defective transmitting receiving Diagnose remote controller OA circuit of remote controller a When RC OK is displayed remote con bnormal if indoor controller board could n se trollers h bl not find blank of transmission path Defective transmitting receiving 2 4 d MN E3 Error code E5 circuit of indoor controller Turn the power off and on again to check Indoor controller board receives trans board 1 21 again replace E5 mitted data at the same time compares Noise has entered into trans HE d b When RC NG is displayed replace remote controller the data and when detecting it judges mission wire of remote con different data to be abnormal 30 ii Rie 4 continuous times Error code E5 pale
52. tes whether control power is supplied Make sure that this LED is always lit LED 2 power for remote controller Indicates whether power is supplied to the remote controller This LED lights only in the case of the indoor unit which is connected to the outdoor unit refrigerant address 0 LED 3 communication between indoor and outdoor units Indicates state of communication between the indoor and outdoor units Make sure that this LED is always blinking AUTO RESTART FUNCTION Indoor controller board This model is equipped with the AUTO RESTART FUNCTION When the indoor unit is controlled with the remote controller the operation mode set temperature and the fan speed are memorized by the indoor controller board The auto restart function sets to work the moment the power has restored after power failure then the unit will restart automatically Set the AUTO RESTART FUNCTION using the wireless remote controller Mode no 1 24 2 Note Refer to the manual of outdoor unit for the details of display 10 3 SELF DIAGNOSIS ACTION TABLE such as F U and other E Room temperature Defective thermistor 0 9 Check resistance value of thermistor thermistor TH1 characteristics 15 0kQ The unit is in three minute resume 2 Contact failure of connector 10 C 50 F 9 6kQ prevention mode if short open of CN20 on the indoor controller 20 C 68 F 6 3kQ thermistor is detected Abnormal if the board Insert
53. tion gt V NG Replace the fan motor 33 10 9 FUNCTIONS SWITCH AND JUMPER WIRE Each function is controlled by the dip switch and the jumper wire on control p c board SW1 and SW2 are equipped only for service parts Model setting and capacity setting are memorized in the nonvolatile memory of the control p c board of the unit Marks in the table below Jumper wire Short X Open For service board Model settings PEAD A24AA l PEAD A30AA Capacity settings PEAD A36AA PEAD A42AA lt Settings at time of factory shipment gt Wireless remote controller 0 Pair number Control PCB O for both J41 and J42 setting with a Four pair number settings are supported wireless The pair number settings of the wireless remote remote controller and indoor control PCB J41 J42 are controller Y given in the table on the left x in the table indicates the jumper line is disco nnected Unit type There is no jumper JP1 because these models setting Te EM have the cond eva temperature thermistor TH5 Indoor controller Indoor controller board type JP3 board type Factory shipment 2 setting Service parts 34 11 DISASSEMBLY PROCEDURE Exercise caution when removing heavy parts 1 Control box PEAD A24AA PEAD A30AA PEAD A36AA PEAD A42AA 1 Removing the control box cover A 1 Remove the two fixing screws on the cover to remove it Fig 1
54. tion operation SS O P8 7 Pipe temperature error ooo E9 Indoor outdoor unit communication error Transmitting error Outdoor unit For details check the LED display contol Dea Abnormal temperature heat sink As for outdoor unit refer to Outdoor unit fan safeguard stop 06 Compressor overcurrent interruption Abnormal of power module Abnormality of super heat due to low discharge temperature U9 UH Abnormality such as overvoltage or voltage shortage and abnormal synchronous signal to main circuit Current sensor error Others Other errors Refer to the technical manual for the outdoor unit On wired remote controller D Check code displayed in the LCD 21 e If the unit cannot be operated properly after the test run has been performed refer to the following table to remove the cause Symptom Cause Wired remote controller LED 1 2 PCB in outdoor unit For about 2 After LED 1 2 are lighted LED 2 is For about 2 minutes after power on op PLEASE WAIT minutes after turned He then only LED 1 is eration of the remote controller is not possible power on lighted Correct operation due to system start up Correct operation e Connector for the outdoor unit s protection Only LED 1 is lighted gt device is not connected PLEASE WAIT Error code After about 2 LED 1 2 blink Reverse or open phase wiring for the outdoor minutes has unit s power terminal block L1 L2 L3
55. tive Jul 2009 t e 09050 j j i Printed in Japan Specifications subject to change without notic
56. troller defect in case of twin triple indoor unit circuit board to transmit signals system Indoor outdoor unit communication Defective transmitting receiving 9 Turn the power off and on again to check error Transmitting error circuit of indoor controller board If abnormality generates again replace Abnormal if 1 receiving is detected 30 Noise has entered into power indoor controller board times continuously though indoor controller supply board has transmitted O Noise has entered into outdoor control wire Indoor controller board Defective indoor controller D Replace indoor controller board Abnormal if data cannot be read normally board from the nonvolatile memory of the indoor controller board Remote controller control board D Defective remote controller D Replace remote controller 0 Abnormal if data cannot be read normal ly from the nonvolatile memory of the E1 remote controller control board Error code E1 Or E2 8 Abnormal if the clock function of remote controller cannot be operated normally Error code E2 Water leakage Mis piping of extension pipes C Check the extension pipes for mis piping This detection is performed during the When connected with multiple operation stop heating fan or error stop units mode etc other than cooling and dry When a and b are found water leakage Mis wiring of indoor outdoor Check the Indoor outdoor unit connecting Occurs unit connecting wi
57. unit communication error Transmitting error Outdoor unit Compressor overcurrent interruption Open short of outdoor unit thermistors Compressor overcurrent interruption When compressor locked Abnormal high discharging temperature 49C worked insufficient refrigerant Abnormal high pressure 63H worked Overheating safeguard operation Abnormal temperature of heat sink For details check the LED Outdoor unit fan protection stop display of the outdoor controller Compressor overcurrent interruption Abnormal of power module board Abnormality of super heat due to low discharge temperature Abnormality such as overvoltage or voltage shortage and abnormal synchronous signal to main circuit Current sensor error Other errors Refer to the technical manual for the outdoor unit 1 If the beeper does not sound again after the initial two beeps to confirm the self check start signal was received and the OPERATION INDICATOR lamp does not come on there are no error records 2 If the beeper sounds three times continuously beep beep beep 0 4 0 4 0 4 sec after the initial two beeps to confirm the self check start signal was received the specified refrigerant address is incorrect On wireless remote controller The continuous buzzer sounds from receiving section of indoor unit Blink of operation lamp On wired remote controller Check code displayed on the LCD f the unit cannot be operated properly after the above test run
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