Mitsubishi Electric PUHZ-SHW112YAA, Service Manual

Page 1: ...CIFICATIONS 16 8 REFRIGERANT SYSTEM DIAGRAM 17 9 TROUBLESHOOTING 20 10 MONITORING THE OPERATION DATABY THE REMOTE CONTROLLER 59 11 DISASSEMBLY PROCEDURE 65 Note 7KLV PDQXDO GHVFULEHV VHUYLFH GDWD RI WKH RXWGRRU XQLWV RQO 5 72 7 5 7 3803 81 76 Service Ref PUHZ SHW80VAA UK PUHZ SHW112VAA UK PUHZ SHW80YAA UK PUHZ SHW112YAA UK PUHZ SW75VAA UK PUHZ SW100VAA UK PUHZ SW75YAA UK PUHZ SW100YAA UK PUHZ SHW8...

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Page 3: ...io ration of refrigerant oil etc If large amount of mineral oil enters that can cause deterio ration of refrigerant oil etc Store the piping indoors 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 compressor Ventilate the ro...

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Page 5: ... UHIULJHUDQW 8VH QHZ SLSHV IRU 6 6 DQG 6 PRGHOV The existing pipe thickness does not meet VSHFL FDWLRQV RU WKH SLSHV DUH GDPDJHG 2 4 PRECAUTIONS FOR SALT PROOF TYPE BS MODEL OWKRXJK 6 PRGHO KDV EHHQ GHVLJQHG WR EH UHVLVWDQW WR VDOW GDPDJH REVHUYH WKH IROORZLQJ SUHFDXWLRQV WR PDLQWDLQ WKH SHU IRUPDQFH RI WKH XQLW YRLG LQVWDOOLQJ WKH XQLW LQ D ORFDWLRQ ZKHUH LW ZLOO EH H SRVHG GLUHFWO WR VHDZDWHU RU...

Page 6: ...B mm R410A 36 0mm for indoor unit of RP100 125 and 140 R22 mm Gauge manifold Charge hose Gas leak detector Refrigerant recovery equipment Refrigerant cylinder Applied oil Safety charger Charge valve Vacuum pump Flare tool Bender Pipe cutter Welder and nitrogen gas cylinder Refrigerant charging scale Vacuum gauge or thermis tor vacuum gauge and vacuum valve Charging cylinder Air purge refrigerant c...

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Page 10: ...ROXIMATE THRESHOLD OF HEARING FOR CONTINUOUS NOISE BAND CENTER FREQUENCIES Hz COOLING MODE HEATING 49 SPL dB 47 LINE NC 60 NC 50 NC 40 NC 30 NC 20 NC 70 90 80 70 60 50 40 30 20 10 OCTAVE BAND SOUND PRESSURE LEVEL dB 0 dB 0 0002 µ bar 63 125 250 500 1000 2000 4000 8000 APPROXIMATE THRESHOLD OF HEARING FOR CONTINUOUS NOISE BAND CENTER FREQUENCIES Hz COOLING MODE HEATING 45 SPL dB 43 LINE 1 5 m 1 m M...

Page 11: ... HOLE 2X 27 KNOCK OUT REAR TRUNKING HOLE KNOCK OUT REAR PIPING HOLE KNOCK OUT 55 38 58 71 30 55 25 92 65 92 SERVICE PANEL TERMINAL CONNECTION LEFT POWER SUPPLY WIRING RIGHT INDOOR OUTDOOR WIRING EARTH TERMINAL 1 2 1 328 1 336 2 802 30 528 1020 363 1050 2 INDICATION OF TERMINAL CONNECTION LOCATION 2 1 REFRIGERANT GAS PIPE CONNECTION FLARE 15 88 5 8F EXAMPLE OF NOTES REFRIGERANT LIQUID PIPE CONNECTI...

Page 12: ...5 1 LEV A WH 3 1 63H YE 1 2 t 1 4 t t TH3 WH TH7 6 RD LEV A M 5 5 1 LEV B RD LEV B M 5 2 1 t TH4 TH4 WH 63L 3 1 63L RD LED1 LED2 63HS WH TRANS TH7 TH6 TH3 63HS CN4 WH 1 3 TH8 CNM WH 1 14 CNDC PK 1 2 3 CNS WH 3 1 F2 F1 F3 F4 CNAC WH 1 3 CNDM WH 1 2 2 1 2 3 4 7 CN2 RD CNL BU CNDC PK 3 1 3 1 SW4 SW8 SWP SW1 SW6 SW5 1 3 2 7 2 1 1 1 1 1 3 2 2 7 2 CN7 WH CN6 WH CN4 WH CN2 RD CN5 RD BK RD RD RS L3OUT X52...

Page 13: ... on the S3 terminal caused by electrical circuit design that has no electrical insulation between power line and communication signal line Therefore please turn off the main power supply when servicing And do not touch the S1 S2 S3 terminals when the power is energized If isolator should be used between indoor unit and outdoor unit please use 3 pole type Notes 1 Wiring size must comply with the ap...

Page 14: ... SHW80VAA BS UK PUHZ SHW112VAA BS UK PUHZ SHW80YAA UK PUHZ SHW112YAA UK PUHZ SHW80YAA BS UK PUHZ SHW112YAA BS UK PUHZ SW100VAA UK PUHZ SW100YAA UK PUHZ SW100VAA BS UK PUHZ SW100YAA BS UK REV V CHECK V H H P SW TH4 TH33 COMP CHECK V L Strainer2 100 Strainer1 100 LEV A LEV B Strainer3 100 Strainer4 100 Rec TH8 TH3 P B TH7 HEX P SENSOR Distributer ball valve Stop valve with service port Strainer6 50 ...

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Page 16: ...OOTING OF PROBLEMS The trouble is not reoccurring Logged Not logged 1Consider the temporary defects such as the work of protection devices in the refrigerant circuit including compressor poor connection of wiring noise etc Re check the symptom and check the installation environment refrigerant amount weather when the trouble occurred matters related to wiring etc 2Reset check code logs and restart...

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Page 20: ...U FRQWUROOHU FLUFXLW ERDUG 8 Power module KHFN DEQRUPDOLW E GULYLQJ SRZHU PRGXOH LQ FDVH RYHUFXUUHQW LV GHWHFWHG 8 RU 83 HUURU FRQGLWLRQ 1 2XWGRRU VWRS YDOYH LV FORVHG 2 HFUHDVH RI SRZHU VXSSO YROWDJH 3 RRVHQHVV GLVFRQQHFWLRQ RU FRQYHUVH RI FRPSUHVVRU ZLULQJ FRQQHFWLRQ 4 HIHFWLYH FRPSUHVVRU 5 HIHFWLYH RXWGRRU SRZHU FLUFXLW ERDUG 1 2SHQ VWRS YDOYH 2 KHFN IDFLOLW RI SRZHU VXSSO 3 RUUHFW WKH ZLULQJ 8...

Page 21: ... ERDUG 6 9 6 9 Input current sensor error L1 phase open error HFUHDVH LQ LQSXW FXUUHQW WKURXJK RXWGRRU XQLW WR RQO LI RSHUDWLRQ IUHTXHQF LV PRUH WKDQ RU HTXDO WR RU FRPSUHVVRU FXUUHQW LV PRUH WKDQ RU HTXDO WR 1 SKDVH RSHQ 6 6 2 LVFRQQHFWLRQ RU ORRVH FRQQHFWLRQ EHWZHHQ 7 DQG RXWGRRU QRLVH ILOWHU FLUFXLW ERDUG 6 6 3 LVFRQQHFWLRQ RU ORRVH FRQQHFWLRQ RI 1 RQ WKH RXWGRRU SRZHU FLUFXLW ERDUG 1 7 RQ WKH ...

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Page 24: ... 5HSODFH RXWGRRU SRZHU FLUFXLW ERDUG 4 5HSODFH RXWGRRU FRQWUROOHU FLUFXLW ERDUG Indoor outdoor unit communication error Signal receiving error Outdoor unit EQRUPDO LI RXWGRRU FRQWUROOHU FLUFXLW ERDUG FRXOG QRW UHFHLYH DQ WKLQJ QRUPDOO IRU PLQXWHV 1 RQWDFW IDLOXUH RI LQGRRU RXWGRRU XQLW FRQQHFWLQJ ZLUH 2 HIHFWLYH FRPPXQLFDWLRQ FLUFXLW RI RXWGRRU FRQWUROOHU FLUFXLW ERDUG 3 HIHFWLYH FRPPXQLFDWLRQ FLU...

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Page 28: ... main power 1RUPDO The start up diagnosis will be over in around 2 minutes 0LVZLULQJ RI LQGRRU outdoor connecting wire UHDNLQJ RI LQGRRU outdoor connecting wire S3 HIHFWLYH LQGRRU controller board HIHFWLYH RXWGRRU controller circuit board 5HIHU WR 6HOI GLDJQRVLV action table in order to solve the trouble Q FDVH RI FRPPXQLFDWLRQ errors the display of remote controller may not match the LED display ...

Page 29: ... LI WKH ZLULQJ LV EDG Check if the fuses are blown The fuses on the outdoor controller circuit board will be blown when the indoor outdoor connecting wire short circuits DG ZLULQJ RI WKH outdoor controller board 7KH IXVHV RQ WKH outdoor controller circuit board are blown KHFN LI PLVZLULQJ EUHDNLQJ or poor contact is causing this problem Indoor outdoor connecting wire is polarized 3 core type Conne...

Page 30: ...SODFH WKH RXWGRRU controller circuit board 1RUPDO Only the unit which has the refrigerant address 0 supplies power to the remote controller 6HW WKH UHIULJHUDQW address to 0 In case of the multiple outdoor units control recheck the refrigerant address again HIHFWLYH LQGRRU power board 5HSODFH WKH LQGRRU power board HIHFWLYH RXWGRRU power circuit board 5HSODFH WKH RXWGRRU power circuit board HIHFWLY...

Page 31: ...ire Check the voltage of the remote controller wire If it is not between 10 and 16 V DC the indoor controller board must be defective 7KH UHPRWH FRQWUROOHU wire short circuits KHFN LI WKH UHPRWH controller wire is short circuited HIHFWLYH LQGRRU controller board 5HSODFH WKH LQGRRU controller board Diagnosis flow Cause QVSHFWLRQ PHWKRG DQG troubleshooting Symptoms Nothing is displayed on the remote...

Page 32: ... expansion valve LEV A LEV B LEV C 1 Normal Abnormal Open or short Disconnect the connector then measure the resistance with a tester Winding temperature 20 Normal Gray Black Gray Red Gray Yellow Gray Orange Abnormal 46 3 Open or short Refer to the next page Fan motor MF1 Measure the resistance between the terminals with a tester Winding temperature 20 W V U 1435 i 150 9 4 HOW TO CHECK THE PARTS P...

Page 33: ...DC TEST POINT 2 VCC between 5 and 4 í of the fan connector VCC 15 V DC Replace the fan motor Replace the outdoor controller board Replace the fan motor Replace outdoor controller board C B and fan motor MF1 Replace outdoor controller board Replace the fan motor Is the voltage normal Is the resistance abnormal Yes Yes No No Fan motor check CNF1 Is there contact failure Did the fuse blow No Yes Chec...

Page 34: ...t H S W 7KHUPLVWRU 5 N FRQVWDQW Rt H S W Medium temperature thermistor 7KHUPLVWRU HDW VLQN 7 N N N N N N N N N N High temperature thermistor 7KHUPLVWRU LVFKDUJH 7 7KHUPLVWRU RPS VXUIDFH 7 0 10 20 30 40 50 20 10 0 10 20 30 40 50 Temperature Resistance k 200 150 100 50 0 25 50 75 100 125 Temperature Resistance k 500 400 300 200 100 0 25 50 75 100 120 Temperature Resistance k OCH651 All manuals and u...

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Page 41: ...When compressor is working in heating operation 1 Abnormal history clear Refrigerant address setting When power supply ON Clear Normal off or operating SWP 6 5 4 3 Under suspension Pump down Start Normal SW4 SW8 1 2 1 2 3 No function No function Use of existing pipe Used Not used No function Separate indoor outdoor unit power supplies Used Not used Always When power supply ON ON OFF 1 2 3 0 1 2 3 ...

Page 42: ...Effective timing 21 2 3 VZLWFK 6 1R IXQFWLRQ 2 3RZHU IDLOXUH DXWRPDWLF UHFRYHU 2 XWR UHFRYHU 1R DXWR UHFRYHU KHQ SRZHU VXSSO 21 1R IXQFWLRQ 6 1R IXQFWLRQ 1R IXQFWLRQ 1R IXQFWLRQ HIURVW VHWWLQJ RU KLJK KXPLGLW 1RUPDO OZD V 6 1R IXQFWLRQ 2 XQFWLRQ VZLWFK 9DOLG 1RUPDO OZD V 6WDUWLQJ PELHQW WHPS RI ÀDVK LQMHFWLRQ 38 6 RQO 6 6 PELHQW WHPS 2 2 QLWLDO VHWWLQJ 2 21 21 2 í 21 21 í OZD V 6 0RGHO VHOHFW 2 6 ...

Page 43: ...eceiving error is detected by indoor unit Remote controller transmitting error is detected by indoor unit Serial communication error Communication between outdoor controller board and outdoor power board Check code displayed on remote controller Refer to service manual for indoor unit 1Check if indoor outdoor connecting wire is connected correctly 2Check if 4 or more indoor units are connected to ...

Page 44: ...t breaking Start up locked Compressor overcurrent breaking Abnormality of current sensor P B Abnormality of power module Open short of outdoor thermistors TH4 TH33 Open short of outdoor thermistors TH3 TH32 TH6 TH7 and TH8 1Check if connectors TH3 TH32 TH4 TH33 and TH7 6 on outdoor controller board and connector CN3 on outdoor power board are not disconnected 2Measure resistance value of outdoor t...

Page 45: ...lay Contents to be inspected When power is turned on F3 F5 F9 E8 E9 EA Eb EC EE E0 E7 63L connector red is open 63H connector yellow is open 2 connectors 63H 63L are open Indoor outdoor communication error Signal receiving error Outdoor unit Indoor outdoor communication error Transmitting error Outdoor unit Miswiring of indoor outdoor unit connecting wire excessive number of indoor units 4 units o...

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Page 53: ...ntrol 1 2 1 4 8 2 The tens digit The ones digit In this digit the total number of activated control is displayed Preventive control for excessive temp erature rise of discharge temperature Preventive control for excessive temp erature rise of condensing temperature Frosting preventing control Preventive control for excessive temp erature rise of radiator panel Example The following controls are ac...

Page 54: ... air temperature TH7 Outdoor unit Heat sink temperature TH8 Discharge superheat SHd Sub cool SC Compressor Operating frequency Compressor Target operating frequency Outdoor unit Fan output step Outdoor unit Fan 1 speed Only for air conditioners with DC fan motor Outdoor unit Fan 2 speed Only for air conditioners with DC fan motor LEV A opening LEV B opening Primary current DC bus voltage Thermosta...

Page 55: ...or postponement history 2 previous Outdoor unit Error postponement history 3 last but one Examples Ver 5 01 ĺ Auxiliary information displayed after version information Examples Ver 5 01 A000 ĺ Displays postponement code is displayed if no postponement code is present Displays postponement code is displayed if no postponement code is present Displays postponement code is displayed if no postponemen...

Page 56: ... mode at time of error Compressor Operating current at time of error Compressor Accumulated operating time at time of error Compressor Number of operation times at time of error Discharge temperature at time of error Outdoorunit Liquidpipe1temperature TH3 attimeoferror Outdoor unit 2 phasepipetemperature TH6 at timeof error Outdoor unit Outside air temperature TH7 at time of error Outdoor unit Hea...

Page 57: ...FROST Relay output state Display Power currently Compressor Four way valve Solenoid valve supplied to compressor Outdoor unit Control state Request code 51 Data display State 0 0 0 0 Normal 0 0 0 1 Preparingforheatoperation 0 0 0 2 Defrost Compressor Frequency control state Request code 52 Data display 0 0 Frequency control state 2 Frequency control state 1 Frequency control state 1 Display Curren...

Page 58: ...N ON ON Actuator output state 2 Display 52C SV2 SS 0 1 2 3 4 5 6 7 ON ON ON ON ON ON ON ON ON ON ON ON Error content U9 Request code 55 Data display Error content 1 Error content 2 0 0 Error content 1 Detected Display Overvoltage Undervoltage L1 phase Power synchronizing error error open error signal error 0 1 2 3 4 5 6 7 8 9 A b C d E F Error content 2 Detected Display Converter Fo PAM error erro...

Page 59: ...Standard 1 For high humidity Setting information 2 Display Single Heat pump 3 phase cooling only 0 Single phase Heat pump 1 Cooling only 2 3 phase Heat pump 3 Cooling only Outdoor unit Capacity setting display Request code 70 Data display Capacity 10 50 9 35 11 60 14 71 20 100 25 125 28 140 40 200 50 250 OCH651 All manuals and user guides at all guides com ...

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Page 62: ...DU î WR UHPRYH WKH VHQVRU KROGHU 3XOO RXW WKH WKHUPLVWRU PELHQW 7 IURP VHQVRU KROGHU Note 1 When replacing thermistor Ambient TH7 replace it together with thermistor 2 phase pipe TH6 since they are combined together Refer to procedure No 6 to remove the thermistor 2 phase pipe TH6 Photo 7 8 Removing the thermistor Liquid TH3 5HPRYH WKH VHUYLFH SDQHO 6HH 3KRWR 5HPRYH WKH WRS SDQHO 6HH 3KRWR 5HPRYH ...

Page 63: ... LEV coil LEV A LEV B LEV C 1 lead wire for high pressure switch low pressure switch and high pressure sensor 5HPRYH WKH HOHFWULFDO SDUWV ER 6HH 3KRWR RRVHQ WKH EDQGV IRU WKH OHDG ZLUH 5HPRYLQJ WKH ZD YDOYH FRLO 5HPRYH WKH ZD YDOYH FRLO IL LQJ VFUHZ IRU ULJKW 0 WR UHPRYH WKH ZD YDOYH FRLO 6OLGH WKH ZD YDOYH FRLO ULJKWZDUG WR UHPRYH LW 5HPRYLQJ WKH 9 FRLO RRVHQ WKH OHDG ZLUHV IL HG WR WKH SLSHV ZLW...

Page 64: ...from heating as the tem perature below then braze the pipes so that the inside of pipes are not oxidized ZD YDOYH RU PRUH 9 RU PRUH LJK SUHVVXUH VZLWFK RU PRUH RZ SUHVVXUH VZLWFK RU PRUH LJK SUHVVXUH VHQVRU RU PRUH 1 For SHW model only Photo 11 SHW model Photo 12 12 Removing the compressor MC 5HPRYH WKH VHUYLFH SDQHO 6HH 3KRWR 5HFRYHU UHIULJHUDQW 5HPRYH WKH HOHFWULFDO SDUWV ER 6HH 3KRWR 5HPRYH WKH...

Page 65: ...out spreading it in the air Photo 13 14 Removing the reactor ACL1 ACL2 ACL3 Y model only 5HPRYH WKH HOHFWULFDO SDUWV ER 6HH 3KRWR 5HPRYH WKH UHDFWRU DVV IL LQJ VFUHZV IRU ULJKW î WKHQ VOLGH WKH UHDFWRU DVV XSZDUG WR UHPRYH LW 5HPRYH WKH UHDFWRU IL LQJ VFUHZV IRU IURQW î WR UHPRYH WKH UHDFWRU RQ WKH UHDFWRU DVV Note 1 Pay extra attention when handling the reactor since it is very heavy 4 1 kg Photo...

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Page 68: ...DU î WR UHPRYH WKH VHQVRU KROGHU 3XOO RXW WKH WKHUPLVWRU PELHQW 7 IURP VHQVRU KROGHU Note 1 When replacing thermistor Ambient TH7 replace it together with thermistor 2 phase pipe TH6 since they are combined together Refer to procedure No 6 to remove the thermistor 2 phase pipe TH6 Photo 7 8 Removing the thermistor Liquid TH3 5HPRYH WKH VHUYLFH SDQHO 6HH 3KRWR 5HPRYH WKH WRS SDQHO 6HH 3KRWR 5HPRYH ...

Page 69: ...alve LEV LEV A LEV B high pressure switch and high pressure sensor 5HPRYH WKH VHUYLFH SDQHO 6HH 3KRWR 5HFRYHU UHIULJHUDQW 5HPRYH WKH HOHFWULFDO SDUWV ER 6HH 3KRWR 5HPRYH WKH YDOYH EHG IL LQJ VFUHZV IRU IURQW î DQG WKH EDOO YDOYH DQG VWRS YDOYH IL LQJ VFUHZV IRU IRUQW WR UHPRYH WKH YDOYH EHG 5HPRYH WKH VLGH SDQHO 5 6HH 3KRWR 5HPRYLQJ WKH ZD YDOYH 5HPRYH WKH ZD YDOYH FRLO 5HPRYH WKH ZHOGHG SDUW RI Z...

Page 70: ...in the air 2 Tighten the nuts of compressor with a torque of 4 0 4 N m Photo 11 1 13 Removing the receiver 5HPRYH WKH VHUYLFH SDQHO 6HH 3KRWR 5HFRYHU UHIULJHUDQW 5HPRYH WKH SLSLQJ 5HPRYH WKH UHFHLYHU OHJ IL LQJ VFUHZV IRU WRS î WKHQ VOLGH WKH UHFHLYHU XSZDUG WR UHPRYH LW 7KH UHFHLYHU LV IL HG WR WKH EDVH ZLWK D KRRN RQ WKH ERWWRP Note 1 Recover refrigerant without spreading it in the air Photo 11 ...

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