Mitsubishi Electric PUHZ-HW112YHA-BS Service Manual Download Page 51

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10 to 16 V DC?

Y ES

Lighting

B linking

Lighting

B linking

Check the voltage of the
terminal block (TB 6) of
the remote controller.

Check the status of the LED2
after disconnecting the remote
controller wire from the terminal
block (TB 5) of the indoor unit.

remote controller

remote controller.

contact of the remote
controller wire

remote controller wire.
Check the voltage of the
terminal block (TB 5)
connecting the remote
controller wire.
If it is not between DC 10V
and DC16V , the indoor
controller board must be
defective.

wire short-circuits

controller wire is
short-circuited.

controller board

controller board.

Diagnosis flow

Cause

troubleshooting

S y mp toms: N oth ing is disp lay ed on th e remote c ontroller.

controller board
LED1 :
LED2 : or
LED3 : —

Check the status
of the LED2.

OCH526C

Summary of Contents for PUHZ-HW112YHA-BS

Page 1: ... 3 3 S A F E T Y P R E C A U T I O N 4 4 S P E C I F I C A T I O N S 8 5 D A T A 1 0 6 O U T L I N E S A N D D I M E N S I O N S 1 1 7 W I R I N G D I A G R A M 1 3 8 W I R I N G S P E C I F I C A T I O N S 1 8 9 R E F R I G E R A N T S Y S T E M D I A G R A M 1 9 1 0 T R O U B L E S HO O T I N G 2 1 1 1 F U N C T I O N S E T T I N G 8 3 1 2 M O N IT O R IN G T HE O P E R A T IO N D A T A B Y T HE...

Page 2: ...0 Y HA R 2 B S U K P U HZ S HW 1 1 2 Y HA P U HZ S HW 1 1 2 Y HA R 1 P U HZ S HW 1 4 0 Y HA P U HZ S HW 1 4 0 Y HA R 1 S erv ic e ref h av e b een c h anged as follows P U HZ S HW 8 0 V HA R 2 B S U K P U HZ S HW 8 0 V HA R 3 B S U K P U HZ S HW 1 1 2 V HA R 2 B S U K P U HZ S HW 1 1 2 V HA R 3 B S U K P U HZ S HW 1 1 2 Y HA R 2 B S U K P U HZ S HW 1 1 2 Y HA R 3 B S U K P U HZ S HW 1 4 0 Y HA R 2...

Page 3: ...I N D O O R U N I T S E R V I C E M A N U A L 2 1 F O R A I R T O W A T E R S Y S T E M 2 2 F O R A I R T O A I R S Y S T E M 2 R E F E R E N C E M A N U A L OCH526C ...

Page 4: ... charging cylinder is used the composition of refrigera nt will change and the efficiency will be lowered Flare tool Electronic refrigerant charging scale V acuum pump adaptor Size adjustment gauge Gauge manifold Torq ue wrench Gas leak detector Charge hose Tools for R410A Contamination inside refrigerant piping can cause deterio ration of refrigerant oil etc If large amount of mineral oil enters ...

Page 5: ...rec ov ering th e refrigerant left in unit c omp letely 2 D o not release refrigerant in th e air 3 A fter c omp leting serv ic e c h arge th e c y c le with sp ec ified amount of refrigerant 4 W h en p erforming serv ic e install a filter drier simultaneously B e sure to use a filter drier for new refrigerant 2 A dditional refrigerant c h arge W h en c h arging direc tly from c y linder 1 2 3 4 5...

Page 6: ...n f lowing ref rigerant 4 T he pipes can be reused S H W H A Measure the exi sting pipe thickness and check f or damage Check if ex isting air conditioner can operate Exi sting air conditioner can operate Disconnect exi sting air con ditioner f rom piping Ex isting pipes can be reused Perf orm cooling operation f or about 30 minutes and then do a pump down work Use a ref rigerant recovery eq uipme...

Page 7: ... blowing out when detaching charge hose V acuum drying and air purge Flaring work of piping B end the pipes Cut the pipes Weld the pipes Charge refrigerant Check the degree of vacuum V acuum valve prevents back flow of oil and refri gerant to thermistor vacuum gauge Refrigerant charge Tool ex clusive for R410A Tool ex clusive for R410A Tool for HFC refrigerant Tool ex clusive for R410A Tool ex clu...

Page 8: ...ANT PI PI NG 2 5 P UH Z S H W 8 0 V H A 29 5 35 50 51 51 52 A kW W kW K min CFM dB dB mm in mm in mm in kg lb kg lbs L mm in mm in Power supply phase cycle voltage Max current Ex ternal f inish R ef rigerant control Compressor Model Motor output Starter type Protection devices Crankcase heater H eat ex changer Fan Fan drive o No Fan motor output Airf low Def rost method Noise level Dimensions W ei...

Page 9: ... V H AR2 B S UK 29 5 35 50 51 51 52 P UH Z S H W 1 1 2 V H AR3 B S UK P UH Z S H W 8 0 V H AR3 B S UK A kW W kW K min CFM dB dB mm in mm in mm in kg lb kg lb L mm in mm in Power supply phase cycle voltage Max current Ex ternal f inish R ef rigerant control Compressor Model Motor output Starter type Protection devices Crankcase heater H eat ex changer Fan Fan drive o No Fan motor output Airf low De...

Page 10: ... R 3 B S U K P U HZ S HW 1 1 2 V HA R 2 B S U K P U HZ S HW 1 1 2 V HA R 3 B S U K P U HZ S HW 1 1 2 Y HA R 2 B S U K P U HZ S HW 1 1 2 Y HA R 3 B S U K P U HZ S HW 1 4 0 Y HA R 2 B S U K P U HZ S HW 1 4 0 Y HA R 3 B S U K P U HZ S HW 1 1 2 Y HA P U HZ S HW 1 4 0 Y HA P U HZ S HW 1 1 2 Y HA R 1 P U HZ S HW 1 4 0 Y HA R 1 5 3 N O I S E C R I T E R I O N C U R V E S P U HZ S HW 8 0 V HA P U HZ S HW ...

Page 11: ...ply wiring hole 2 27 Knockout 9 2 9 2 65 45 40 27 55 23 7 3 63 Front piping hole Knockout Front trunking hole Knockout Power supply wiring hole 2 27 Knockout 9 2 145 145 220 30 145 81 219 7 1 7 1 B ottom piping hole Knockout Drain hole 5 33 23 SHW V HA SHW Y HA 1 07 9 A 9 30 Over Over Over Over Less than Piping and wiring connections can be made from 4 directions front right rear and below 4 PIPIN...

Page 12: ... 63 Rear piping hole Knockout Rear trunking hole Knockout Power supply wiring hole 2 27 Knockout 9 2 19 55 9 2 7 5 40 7 3 63 23 27 9 2 Right piping hole Knockout Right trunking hole Knockout Power supply wiring hole 2 27 Knockout 9 2 9 2 65 45 40 27 55 23 7 3 63 Front piping hole Knockout Front trunking hole Knockout Power supply wiring hole 2 27 Knockout 9 2 145 145 220 30 145 81 219 7 1 7 1 B ot...

Page 13: ...tion Connector Connection for Option Connector Connection for Option Connector Connection for Option LED Operation Inspection Indicators Fuse T6 3AL250V Relay U V W LI NI P2 N2 DCL1 DCL2 IGB T EI E2 E3 E4 52C C B SW1 Switch Test Operation Switch Function Switch Model Select Switch Model Select SW4 SW5 SW6 P B W DCL CB L N S1 S2 S3 TB 1 V U 2 RED WHT B LK MC CN2 WHT CN4 WHT 1 7 2 1 3 1 RED B LU Y L...

Page 14: ...or Suction LEV A LEV B LEV C SY MB OL M NET ADAPTER NAME TB 7 CN5 CND CN2M Terminal B lock M NET connection Connector Transmission Connector Power Supply Connector M NET communication P B U POWER SUPPLY 3N 400V 50Hz TB 1 V W RED WHT B LK MC 7 L1 L2 L3 N N F CNAC1 WHT 3 1 CNDC PNK 3 1 CNL B LU 1 3 CNAC2 RED 3 1 CNCT RED 1 2 LO1 LO2 LO3 NO GD1 NI LI1 LI2 LI3 GD3 S1 S2 S3 CK 2 3 2 3 ACL4 ACL3 ACL2 AC...

Page 15: ...32 Thermistor Suction LEV A LEV B LEV C SY MB OL M NET ADAPTER NAME TB 7 CN5 CND CN2M Terminal B lock M NET connection Connector Transmission Connector Power Supply Connector M NET communication P B U POWER SUPPLY 3N 400V 50Hz TB 1 V W RED WHT B LK MC 7 L1 L2 L3 N N F CNAC1 WHT 3 1 CNDC PNK 3 1 CNL B LU 1 3 CNAC2 RED 3 1 CNCT RED 1 2 LO1 LO2 LO3 NO GD1 NI LI1 LI2 LI3 GD3 S1 S2 S3 CK 2 3 2 3 ACL4 A...

Page 16: ...Fuse T6 3AL250V Relay U V W LI NI P2 N2 DCL1 DCL2 IGB T EI E2 E3 E4 52C C B SW1 Switch Test Operation Switch Function Switch Model Select Switch Model Select SW4 SW5 SW6 P B W DCL CB L N S1 S2 S3 TB 1 V U 2 RED WHT B LK MC CN2 WHT CN4 WHT 1 7 2 1 3 1 RED B LU Y LW ORN B RN WHT RED GRN Y LW B LK RED CNAC2 WHT CNAC1 LI NI EI E3 CN52C RED 3 1 1 3 52C 52C 1 3 DCL1 DCL2 P2 N2 U V W CNDC PNK B LK 2 MS 3...

Page 17: ... Def rost Def ect H istory R ecord R eset R ef rigerant Address Switch T est Operation Switch Function Switch Model Select Switch Model Select Switch Function Switch Switch Function Switch Switch Function Switch Switch Pump Down Connector Emergency Operation Connector Connection f or Option Connector Connection f or Option Connector Connection f or Option Connector Connection f or Option Connector...

Page 18: ...unit p lease use 3 p ole ty p e N otes 1 W iring size must c omp ly with th e ap p lic ab le loc al and national c odes 2 P ower sup p ly c ab les and th e c ab les b etween I nterfac e unit F low temp c ontroller and outdoor unit sh all not b e ligh ter th an p oly c h lorop rene 3 B e sure to c onnec t th e c ab les b etween I nterfac e unit F low temp c ontroller and outdoor unit direc tly to t...

Page 19: ...4 0 Y HA P U HZ S HW 1 4 0 Y HA R 1 P U HZ S HW 1 4 0 Y HA R 2 U K P U HZ S HW 1 4 0 Y HA R 2 B S U K P U HZ S HW 1 4 0 Y HA R 3 U K P U HZ S HW 1 4 0 Y HA R 3 B S U K Distributor T H 7 Ambient H eat exch anger R ef rigerant G AS pipe connection 5 8 inch R ef rigerant LI Q UI D pipe connection 3 8 inch Stop valve with service port Strainer 100 Power receiver LEV B LEV C LEV A Strainer 100 Strainer...

Page 20: ...3 N ote T h e op eration mode c annot b e c h anged b y S W 4 2 during test run T o c h ange test run mode stop th e unit b y S W 4 1 c h ange th e op eration mode and restart th e test run b y S W 4 1 9 1 R E F R I G E R A N T C O L L E C T I N G P U M P D O W N 1 2 3 4 5 6 5 7 W arning W h en p ump ing down th e refrigerant stop th e c omp ressor b efore disc onnec ting th e refrigerant p ip es ...

Page 21: ...s 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 the unit after finishing service 3There is no abnormality in electrical component controller board remote controller etc 1Re check the a...

Page 22: ... Test run menu Cursor Service menu Test run Drain pump test run 1 2 F1 F2 F3 F4 Cool Pipe Auto Switch disp Mode Fan Remain Test run F1 F2 F3 F4 Remain V ane T est run op eration A uto v ane c h ec k F 1 F 2 F 3 F 4 M E N U R E T U R N S E L E C T O N O F F 1 0 2 2 T est run for wired remote c ontroller P A R 30 M A A P A R 31 M A A OCH526C ...

Page 23: ...g sc reen will ap p ear C h ec k th e error status stop th e op eration and c onsult y our dealer F1 F2 F3 F4 F1 F2 F3 F4 Error information Error reset Error reset Error code Error unit IU Ref address Unt 1 Model name Serial No Reset Page Reset current error Error reset OK Cancel Main menu Reset error Reset button 2 E rrors c annot b e reset wh ile th e O N O F F op eration is p roh ib ited N av i...

Page 24: ... n i a M Test run Input maintenance info Function setting Check Self check F1 F2 F3 F4 Check menu Cursor Service menu Error history Refrigerant volume check Refrigerant leak check Smooth maintenance Req uest code F1 F2 F3 F4 Error history Page Delete Check menu Error Unt dd mm yy Error history Cancel OK Delete error history Error history Check menu Error history deleted 2 3 E rror h istory 4 D ele...

Page 25: ...capacity control to provide optimum f an speeds T heref ore the f an keeps running at a low speed to meet the current outside air condition unless it ex ceeds its available max imum power T hen in actuality the f an may stop or run in the reverse direction depending on the outside air but this does not mean malf unction Check f or correct motion of auto vanes Cooling mode Check if cool air blows a...

Page 26: ...OUV ER TEST RUN AUTO STOP AUTO START h min TESTRUN RESET SET CLOCK 7 5 6 2 3 4 1 0 2 4 T est run for wireless remote c ontroller 1 2 TEST RUN TEST RUN 3 MODE COOL 4 MODE HEAT 5 FAN 6 V ANE 7 N ote wh ile following step s 2 to 7 OCH526C ...

Page 27: ...ddress Return t e s e R Error Unt C I p r G F1 F2 F3 F4 Self check Return Reset M NET address Grp Error Unt W h en th ere is no error h istory F1 F2 F3 F4 Self check Delete error history Ref address Cancel OK F1 F2 F3 F4 Self check Return Ref address Error history deleted 2 1 3 4 N av igating th rough th e sc reens 1 0 3 HO W T O P R O C E E D S E L F D I A G N O S I S 1 0 3 1 S elf diagnosis P A ...

Page 28: ...c k th e remote c ontroller disp lay and see if any th ing is disp lay ed inc luding lines N oth ing will ap p ear on th e remote c ontroller disp lay if th e c orrec t v oltage 8 5 1 2 V D C is not sup p lied to th e remote c ontrol ler I f th is is th e c ase c h ec k th e remote c ontroller wiring and indoor units R emote c ontroller c h ec k results sc reen 1 0 3 2 R emote c ontroller c h ec k...

Page 29: ...he diagnosis result display screen see step 3 F E G C D H B A I Check Code 2 or 4 digits Alternating Display Address 3 digits or unit number 2 digits The refrigerant address will begin to blink approx imately 3 seconds after being selected and the self diagnosis process will begin Unit number or refrigerant address to be diagnosed Check Code 2 or 4 digits Alternating Display Address 3 digits or un...

Page 30: ...w A Press the FILTER button to start self diagnosis 3 Remote controller self diagnosis result When the remote controller is functioning correctly Check for other possible causes as there is no problem with the remote controller When the remote controller malfunctions Error display 1 NG blinks The remote controller s transmitting receiv ing circuit is defective The remote controller must be replace...

Page 31: ... diagnosis W ireless remote c ontroller I n c ase of troub le during op eration ON OFF TEMP FAN V ANE MODE CHECK LOUV ER TEST RUN AUTO STOP AUTO START h min RESET SET CLOCK CHECK CHECK display Temperature button CHECK button Refrigerant address display HOUR button ON OFF button OCH526C ...

Page 32: ...ler Wired remote controller B eeper sounds OPERATION INDICATOR lamp blinks Check code Number of times Wireless remote controller Wired remote controller 1 P1 Intake sensor error P9 Pipe TH5 sensor error 2 P2 Pipe TH2 sensor error 3 E6 E7 Indoor outdoor unit communication error 4 P4 Drain sensor error Float switch connector open 5 P5 Drain pump error PA Forced compressor stop due to water leakage a...

Page 33: ... A b normalities detec ted wh en th e p ower is turned on A b normal p oint and detec tion meth od C ase Judgment and ac tion 1 2 3 4 5 6 7 1 2 3 4 5 6 7 6 3H c onnec tor op en 1 2 3 4 1 2 3 4 6 3L c onnec tor op en 1 2 3 4 1 2 3 4 C h ec k c ode OCH526C ...

Page 34: ... indoor outdoor unit c onnec ting wire c onv erse wiring or disc onnec tion S tart up time ov er C ase 1 2 7 8 1 2 4 5 6 7 8 I ndoor outdoor unit c onnec tor miswiring ex c essiv e numb er of units 4 units or more 1 2 3 4 6 7 8 1 8 1 2 3 4 5 6 7 8 2 c onnec tor op en 1 2 3 4 1 2 3 4 OCH526C ...

Page 35: ... 6 3H op erated 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 1 6 7 8 9 2 3 4 6 7 8 C ase O p en sh ort c irc uit of outdoor unit temp erature th ermistor T H4 T H34 1 2 3 1 2 3 A b normalities detec ted wh ile unit is op erating High disc h arge temp erature High c omp surfac e temp erature 1 2 3 4 5 6 7 1 2 34 5 6 OCH526C ...

Page 36: ...p erature of h eatsink 1 2 3 4 5 6 7 12 3 4 5 6 7 O p en sh ort of outdoor unit th ermistors T H3 T H32 T H33 T H6 T H7 and T H8 1 2 3 1 2 3 P ower module 1 2 3 4 5 1 2 3 4 5 T oo low sup erh eat due to low disc h arge temp erature 1 2 3 4 5 12 3 4 5 O utdoor fan motor 1 2 1 2 3 1 OCH526C ...

Page 37: ... tion C h ec k c ode O v erv oltage error 1 2 3 4 1 2 3 4 U nderv oltage error 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 I np ut c urrent sensor error L 1 p h ase op en error 1 2 3 4 5 6 1 2 3 4 5 6 A b normal p ower sy nc h ronous signal 1 2 3 4 5 1 2 3 4 5 OCH526C ...

Page 38: ... p ressure of 6 3HS 1 2 3 1 2 3 A b normal p oint and detec tion meth od C ase Judgment and ac tion P F C error O v erv oltage U nderv oltage O v erc urrent P F C I G B T error U nderv oltage 1 2 3 1 2 3 C urrent sensor error or inp ut c urrent error 1 2 3 1 2 3 L ow p ressure 6 3L op erated 1 2 3 4 5 6 1 2 4 5 6 C h ec k c ode OCH526C ...

Page 39: ...ion C ase R emote c ontroller transmission error E 0 signal rec eiv ing error E 4 1 2 1 2 1 2 3 o 1 3 4 1 2 3 4 5 6 C omp ressor ov erc urrent interrup tion 1 2 3 4 5 6 7 8 9 1 2 3 4 5 6 7 8 9 R emote c ontroller c ontrol b oard 1 2 1 1 C h ec k c ode OCH526C ...

Page 40: ...2 1 2 3 4 1 2 4 N on defined c h ec k c ode 1 2 3 12 3 C ase S erial c ommunic ation error 1 1 2 3 4 12 3 4 1 2 3 2 1 2 3 I ndoor outdoor unit c ommunic ation error S ignal rec eiv ing error O utdoor unit 1 2 3 4 1 2 4 R emote c ontroller transmission error E 3 signal rec eiv ing error E 5 1 2 1 2 1 2 3 4 6 1 2 3 4 5 6 C h ec k c ode OCH526C ...

Page 41: ...ol Service Tool SW2 setting Temperature display of indoor liq uid pipe Indoor 1 Temperature display of indoor liq uid pipe Indoor 2 Temperature display of indoor condenser evaporator pipe Indoor 1 Temperature display of indoor condenser evaporator pipe Indoor 2 A b normal refrigerant c irc uit T h ese detec ted errors will not b e c anc elled until th e p ower sourc e is reset 1 2 3 4 5 1 W h en t...

Page 42: ...udgment and ac tion A ddress dup lic ate definition 1 2 Hard ware error of transmission p roc essor 1 2 3 1 2 B U S B U S Y 1 2 3 1 2 3 4 M N E T c ommunic ation error C ommunic ation error with c ommunic ation p roc essor 1 2 C h ec k c ode OCH526C ...

Page 43: ... p oint and detec tion meth od C ase Judgment and ac tion N O A C K signal 1 2 3 4 5 6 1 2 3 A lway s try th e followings wh en th e error A 7 oc c urs 1 2 3 4 5 1 5 1 5 1 5 6 6 1 6 1 2 3 4 C h ec k c ode OCH526C ...

Page 44: ...A b normal p oint and detec tion meth od C ase Judgment and ac tion 1 2 3 4 1 2 3 4 5 1 2 1 2 3 4 S ame as mentioned in A 7 of th e p rev ious p age C h ec k c ode OCH526C ...

Page 45: ...tec tion meth od C ase Judgment and ac tion M N E T N O R E S P O N S E 1 2 3 4 1 2 1 0 5 T R O U B L E S HO O T I N G O F P R O B L E M S P h enomena F ac tor C ountermeasure 1 1 1 2 3 4 1 2 1 2 1 2 3 4 C h ec k c ode OCH526C ...

Page 46: ...P h enomena F ac tor C ountermeasure 1 2 3 4 5 6 7 1 2 3 4 5 6 7 1 2 12 12 1 1 1 2 3 1 2 3 1 2 3 4 1 2 3 4 OCH526C ...

Page 47: ...Reverse or open phase wiring for the outdoor unit s power terminal block L1 L2 L3 Incorrect wiring between FTC and outdoor incorrect polarity of S1 S2 S3 Remote controller wire short N ote O p eration is not p ossib le for ab out 30 sec onds after c anc ellation of func tion selec tion C orrec t op eration For description of each LED LED1 2 3 provided on the FTC refer to the following table LED1 p...

Page 48: ...fter turning on the main power PLEASE WAIT will be displayed during the start up diagnosis after turning on the main power The start up diagnosis will be over in around 2 minutes outdoor connecting wire outdoor connecting wire S3 controller board controller circuit board action table in order to solve the trouble errors the display of remote controller may not match the LED display of the outdoor ...

Page 49: ... the outdoor unit outdoor controller board outdoor controller circuit board are blown outdoor unit 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 outdoor controller board outdoor controller circuit board are blown or poor contact is causing this problem Indoor outdoor connecting wire is polarized 3...

Page 50: ...of the indoor outdoor connecting wire contact of the indoor outdoor connecting wire controller circuit board controller circuit board Only the unit which has the refrigerant address 0 supplies power to the remote controller address to 0 In case of the multiple grouping system recheck the refrigerant address again power board power board power circuit board power circuit board controller board boar...

Page 51: ... remote controller wire remote controller wire Check the voltage of the terminal block TB 5 connecting the remote controller wire If it is not between DC 10V and DC16V the indoor controller board must be defective wire short circuits controller wire is short circuited controller board controller board Diagnosis flow Cause troubleshooting S y mp toms N oth ing is disp lay ed on th e remote c ontrol...

Page 52: ...ce to clear FILTER from the display See the operation manual that came with the product for how to clean the filters 3 STANDB Y is displayed on the screen 3 This is displayed when the unit starts HEAT operation when the thermostat puts the compressor in operation mode or when the outdoor unit ends DEFROST operation and returns to HEAT operation The display will automatically disappear around 10 mi...

Page 53: ...oor unit is controlling the airflow amount in order to keep the optimum operating condition 5 A sound similar to water flowing is heard from the unit 5 This is not a malfunction This is the sound which is heard when the refrigerant is flowing inside the indoor unit 2 The fan speed does not match the setting of the remote controller in HEAT operation The up down vane will be automatically set to ho...

Page 54: ...irflow direction does not change Up down vane left right louver 3 1 Check if the vane is set to a fixe d position Check if the vane motor connector is removed 2 Check if the air conditioner has a function for switching the air direction 3 If the air conditioner does not have that function NOT AV AILAB LE will be displayed on the remote controller when AIR DIRECTION or LOUV ER button is pressed Som...

Page 55: ...n HEAT water drips down from the heat ex changer Note Make use of optional parts Drain Socket and Drain pan if these water needs to be recovered and drained out for once Water or moisture is ex pelled from the outdoor unit B atteries are being ex hausted Replace them and press the reset button of remote controller The display of wireless remote controller gets dim or does not come on The indoor un...

Page 56: ... Open or short Measure the resistance between the terminals with a tester At the ambient temperature 20 Solenoid valve coil B ypass valve SV R ef er to the next page Fan motor MF1 MF2 112 140Y H A R 1 80 112VH A 0 188 0 302 112 140Y H AR 2 R 3 0 305 Measure the resistance between the terminals with a tester W inding temperature 20 Normal Abnormal Open or short Normal Abnormal Open or short W V U 1...

Page 57: ...fan connector V DC 280 380 V DC TEST POINT 2 V CC between 5 and 4 of the fan connector V CC 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 2 Replace outdoor controller board Replace the fan motor Is the voltage normal Is the resistance abnormal Y es Y es No No F an motor c h ec k C N F 1 2 Is there con...

Page 58: ...R R M edium temp erature th ermistor High temp erature th ermistor 0 10 20 30 40 50 20 10 0 10 20 30 40 50 Temperature Resistance k 200 150 100 50 0 25 50 7 5 100 125 Temperature Resistance k 500 400 300 200 100 0 25 50 7 5 100 120 Temperature Resistance k OCH526C ...

Page 59: ...position capacity A B A B A LEV M 1 6 4 4 3 2 1 1 Gray Orange Red Y ellow B lack 2 3 4 5 Connector LEV A LEV B LEV C 12 V DC Outdoor controller board Drive circuit 3 2 1 3 2 5 4 1 O p eration summary of th e linear ex p ansion v alv e 1 ON OFF OFF OFF ON ON OFF OFF OFF ON OFF OFF OFF ON ON OFF 1 Output Phase Output 2 3 4 2 3 4 5 6 7 8 OFF OFF ON OFF OFF OFF ON ON OFF OFF OFF ON ON OFF OFF ON OCH52...

Page 60: ...Main body Lead wire Stopper Coil B e sure to attach the stopper A 3 How to attac h and detac h th e c oil of linear ex p ansion v alv e How to detac h th e c oil How to attac h th e c oil A OCH526C ...

Page 61: ...genc y op eration p roc edure 1 2 3 4 5 4 R eleasing emergenc y op eration 1 2 3 4 SW4 1 2 Cooling Heating ON SW4 1 2 Cooling Heating ON ON OFF CN31 Shorting pins Inspected content Open short of pipe thermistors TH3 TH6 TH7 TH32 TH33 TH8 Open of pressure sensor T63HS Communication error other than outdoor unit Check code U4 OCH526C ...

Page 62: ...rmistor temperature data is normal not open short that data is loaded into the control as valid data When the unit enters emergency operation and TH values are mismatched set the thermistors to open short And the unit runs emegency operation with the values listed above 2 If one thermistor is set to open short the values for each will be different from the list above Ex ample When liq uid pipe tem...

Page 63: ...P U HZ S HW 1 1 2 V HA R 2 U K P U HZ S HW 1 1 2 V HA R 2 B S U K P U HZ S HW 1 1 2 V HA R 3 U K P U HZ S HW 1 1 2 V HA R 3 B S U K P U HZ S HW 1 1 2 Y HA P U HZ S HW 1 1 2 Y HA R 1 P U HZ S HW 1 1 2 Y HA R 2 U K P U HZ S HW 1 1 2 Y HA R 2 B S U K P U HZ S HW 1 1 2 Y HA R 3 U K P U HZ S HW 1 1 2 Y HA R 3 B S U K P U HZ S HW 1 4 0 Y HA P U HZ S HW 1 4 0 Y HA R 1 P U HZ S HW 1 4 0 Y HA R 2 U K P U H...

Page 64: ... 2 Y HA R 2 U K P U HZ S HW 1 1 2 Y HA R 2 B S U K P U HZ S HW 1 1 2 Y HA R 3 U K P U HZ S HW 1 1 2 Y HA R 3 B S U K P U HZ S HW 1 4 0 Y HA P U HZ S HW 1 4 0 Y HA R 1 P U HZ S HW 1 4 0 Y HA R 2 U K P U HZ S HW 1 4 0 Y HA R 2 B S U K P U HZ S HW 1 4 0 Y HA R 3 U K P U HZ S HW 1 4 0 Y HA R 3 B S U K OCH526C ...

Page 65: ...U HZ S HW 8 0 V HA R 3 U K P U HZ S HW 1 1 2 V HA P U HZ S HW 1 1 2 V HA R 2 U K P U HZ S HW 1 1 2 V HA R 3 U K P U HZ S HW 8 0 V HA R 2 B S U K P U HZ S HW 8 0 V HA R 3 B S U K P U HZ S HW 1 1 2 V HA R 2 B S U K P U HZ S HW 1 1 2 V HA R 3 B S U K 1 3 1 5 2 5 3 4 6 5 7 5 1 2 3 R OCH526C ...

Page 66: ...O utdoor p ower c irc uit b oard P U HZ S HW 1 1 2 Y HA P U HZ S HW 1 4 0 Y HA 1 5 2 5 3 4 6 5 7 5 5 1 2 6 7 OCH526C ...

Page 67: ...U HZ S HW 1 1 2 Y HA R 3 U K P U HZ S HW 1 4 0 Y HA R 1 P U HZ S HW 1 4 0 Y HA R 2 U K P U HZ S HW 1 4 0 Y HA R 3 U K P U HZ S HW 1 1 2 Y HA R 2 B S U K P U HZ S HW 1 1 2 Y HA R 3 B S U K P U HZ S HW 1 4 0 Y HA R 2 B S U K P U HZ S HW 1 4 0 Y HA R 3 B S U K 1 5 2 5 3 4 6 5 7 5 5 1 2 6 7 OCH526C ...

Page 68: ...2 Y HA R 2 U K P U HZ S HW 1 1 2 Y HA R 2 B S U K P U HZ S HW 1 1 2 Y HA R 3 U K P U HZ S HW 1 1 2 Y HA R 3 B S U K P U HZ S HW 1 4 0 Y HA P U HZ S HW 1 4 0 Y HA R 1 P U HZ S HW 1 4 0 Y HA R 2 U K P U HZ S HW 1 4 0 Y HA R 2 B S U K P U HZ S HW 1 4 0 Y HA R 3 U K P U HZ S HW 1 4 0 Y HA R 3 B S U K OCH526C ...

Page 69: ...run Operating OFF Under suspension Test run mode setting Heating Cooling Use of exi sting pipe Used Not used No function Separate indoor outdoor unit power supplies Used Not used Always When power supply ON O N O F F 1 2 3 0 1 2 3 4 5 6 ON 1 2 3 4 5 6 ON 1 2 3 4 5 6 ON 1 2 3 4 5 6 ON 1 2 3 4 5 6 7 4 5 6 ON 1 2 3 4 5 6 ON 1 2 3 4 5 6 ON 1 2 3 4 5 6 ON 1 2 3 8 9 10 11 4 5 6 ON 1 2 3 4 5 6 ON 1 2 3 4...

Page 70: ...h e switc h op eration No function Power failure automatic recovery 1 No function Model select Defrost Hz setting No function No function Defrost setting No function Function switch Starting Ambient temp of flash injection S witc h SW5 SW7 3 DIP switch SW9 SW6 SW5 T y p e of S witc h Auto recovery Defrost Hz o 0 54 For high humidity V alid No auto recovery Normal Normal Normal When power supply ON...

Page 71: ... to O F F CNDM X SW1 X Max 10 m including local wiring SW1 Switch X Relay Contact spec DC1mA Relay supply Red 3 B rown 2 Orange 1 Purchased locally Adapter for ext ernal signal input PAC SC36NA E Outdoor unit controller board 3 2 1 Insulate this point securely as this is not used Low level sound priority mode circuit OCH526C ...

Page 72: ...tdoor power board Communication between outdoor controller board and M NET P C board Communication error of M NET system Error 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 outdoor unit 3Check if noise entered into indoor outdoor connecting wire or power s...

Page 73: ...ntroller board and connector CN3 on outdoor power board are not disconnected 2Measure resistance value of outdoor thermistors Abnormality of heatsink temperature 1Check if indoor outdoor units have a short cycle on their air ducts 2Measure resistance value of outdoor thermistor TH8 1Check the outdoor fan motor 2Check if connector TH3 63HS on outdoor controller board is disconnected Abnormality of ...

Page 74: ...door unit connecting wire ex cessive number of indoor units 4 units or more Miswiring of indoor outdoor unit connecting wire converse wiring or disconnection Startup time over Communication error ex cept for outdoor unit Display Inspection unit 0 1 2 Outdoor unit Indoor unit 1 Indoor unit 2 Display Contents to be inspected During operation U1 U2 U3 U4 U5 U6 U7 U8 Ud UF UH UL UP P1 P8 PL A0 A7 Abno...

Page 75: ...1 ON 2 3 4 5 6 1 ON 2 3 4 5 6 1 ON 2 3 4 5 6 1 ON 2 3 4 5 6 1 ON 2 3 4 5 6 1 ON 2 3 4 5 6 1 ON 2 3 4 5 6 1 ON 2 3 4 5 6 1 ON 2 3 4 5 6 10 1 ON 2 3 4 5 6 1 05 4 25 2 45 1 25 1 50 1 ON 2 3 4 5 6 OCH526C ...

Page 76: ...1 ON 2 3 4 5 6 1 ON 2 3 4 5 6 1 ON 2 3 4 5 6 1 ON 2 3 4 5 6 1 ON 2 3 4 5 6 1 ON 2 3 4 5 6 15 1 30 2 45 1 05 OCH526C ...

Page 77: ...3 4 5 6 1 ON 2 3 4 5 6 1 ON 2 3 4 5 6 1 ON 2 3 4 5 6 1 ON 2 3 4 5 6 Capacity SHW80V SHW112V 112Y SHW140Y Code 14 20 25 Setting details H P 0 Setting details 1 ON 2 3 4 5 6 1 ON 2 3 4 5 6 1 ON 2 3 4 5 6 OCH526C ...

Page 78: ...rror Undervoltage error I nput current sensor error L1 phase open error Abnormal power synchronous signal PFC I G B T error SH W 80 112V Undervoltage Display ex amples f or multiple errors Overvoltage 01 Undervoltage 02 03 Undervoltage 02 Power sync signal error 08 0A L1 phase open error 04 PFC I G B T error 20 24 Description Display 00 01 02 04 08 20 OCH526C ...

Page 79: ...1 ON 2 3 4 5 6 1 ON 2 3 4 5 6 1 ON 2 3 4 5 6 1 ON 2 3 4 5 6 1 ON 2 3 4 5 6 1 ON 2 3 4 5 6 1 ON 2 3 4 5 6 1 ON 2 3 4 5 6 00 1 25 1 OCH526C ...

Page 80: ...1 ON 2 3 4 5 6 30 1 1 ON 2 3 4 5 6 1 ON 2 3 4 5 6 1 ON 2 3 4 5 6 1 ON 2 3 4 5 6 1 ON 2 3 4 5 6 1 ON 2 3 4 5 6 15 15 15 15 OCH526C ...

Page 81: ...e tens digit The ones digit In this digit the total number of activated control is displayed Preventive control for ex cessive temp erature rise of discharge temperature Preventive control for ex cessive temp erature rise of condensing temperature Frosting preventing control Preventive control for ex cessive temp erature rise of radiator panel Ex ample The following controls are activated rature r...

Page 82: ...error Abnormal power synchronous signal PFC I G B T error SH W 80 112V Undervoltage Display ex amples f or multiple errors Overvoltage 01 Undervoltage 02 03 Undervoltage 02 Power sync signal error 08 0A L1 phase open error 04 PFC I G B T error 20 24 Description Display 00 01 02 04 08 20 1 ON 2 3 4 5 6 15 1 ON 2 3 4 5 6 1 05 OCH526C ...

Page 83: ...ompressor operates the humidif ier also operates W hen the f an operates the humidif ier also operates Standard For high humidity 80 60 1 2 1 2 3 1 2 3 1 2 1 2 1 2 1 2 1 2 01 02 03 04 15 16 17 21 T he setting is applied to all the units in the same ref rigerant system 1 1 1 U N I T F U N C T I O N S E T T I N G B Y T HE R E M O T E C O N T R O L L E R 4 Meaning of Function setting Mode02 indoor te...

Page 84: ...revention No 3 setting TH5 32 38 3 Swing Not available Swing 23 1 Available Wave air flow 2 Set temperature in heating Available Temperature correction V alid 24 1 mode 4 deg up Not available Temperature correction Invalid 2 Fan speed when the Ext ra low 1 heating thermostat is OFF Stop 25 2 Set fan speed 3 Fan speed when the Set fan speed 27 1 cooling thermostat is OFF Stop 2 Detection of abnorma...

Page 85: ... 9 9 9 C h ange th e default p assword as nec essary to p rev ent unauth orize d ac c ess Hav e th e p assword av ailab le for th ose wh o need it I f y ou forget y our maintenanc e p assword y ou c an initializ e th e p assword to th e default p assword 9 9 9 9 b y p ressing and h olding th e and b uttons simultaneously for th ree sec onds on th e maintenanc e p assword setting sc reen 3 N ote A ...

Page 86: ...e 11 Unit 1 2 3 4 1 C h ec king th e indoor unit N o F1 F2 F3 F4 Function setting Ref address Sending data Grp 5 T h e ab ov e func tion settings are not av ailab le for th e C ity M ulti units T ab le 1 summariz es th e setting op tions for eac h mode numb er R efer to th e indoor unit I nstallation M anual for th e detailed information ab out ini tial settings mode numb ers and setting numb ers ...

Page 87: ...Specified indoor unit FAN operation Change refrigerant address or unit No 2 Switch to function setting mode Press A and B at the same time with the remote controller stopped 1 1 1 2 S elec ting func tions using th e wired remote c ontroller P A R 2 1 M A A First try to familiarize yourself with the flow of the function selection procedure In this section an ex ample of setting the room temperature...

Page 88: ...s and blinks in the unit number display area and the refrigerant address display area also blinks there are no units that corre spondtotheselectedunitnumber Inthiscase therefrigerantaddressandunit number may be incorrect so repeat steps 2 and 3 to set the correct ones When grouping different refrigerant systems if an indoor unit other than the one to which the refrigerant address has been set to p...

Page 89: ...unit 01 Set address 01 while still in troubleshooting mode then press the MINUTE button Note Y ou cannot specify the refrigerant address 4 Select mode No 24 function that raises set temperature by 4 degrees during HEAT operation Set address 24 while still in troubleshooting mode then press the HOUR button 6 Finished 8 End function selection mode End troubleshooting mode Y ES NO Note When you switc...

Page 90: ... U b utton B ac klit L C D O N O F F lamp F unc tion b utton F 1 F unc tion b utton F 2 F unc tion b utton F 3 F unc tion b utton F 4 Fri Room Set temp Mode Temp Fan Cool Auto Main Main display Cursor Page Main menu V ane Louver V ent Lossnay High power Timer Weekly timer OU silent mode M ain disp lay M ain menu 1 1 2 F U N C T I O N S E L E C T I O N O F R E M O T E C O N T R O L L E R 1 1 2 1 P ...

Page 91: ...c tions are av ailab le on all models of indoor units E nergy sav ing N igh t setb ac k M ain menu V ane L ouv er V ent L ossnay High p ower W eekly timer R estric tion M aintenanc e I nitial setting T imer S erv ic e F ilter information E rror information OCH526C ...

Page 92: ... se to set th e c urrent time M ain disp lay U se to switc h b etween F ull and B asic modes for th e M ain disp lay C ontrast U se to adj ust sc reen c ontrast D isp lay details M ake th e settings for th e remote c ontroller related items as nec essary C loc k T emp erature R oom temp A uto mode A uto mode W h eth er or not to use th e A uto mode c an b e selec ted b y using th e b utton T h is ...

Page 93: ... 2 OFF The cloc 3 Timer function setting To s ON OFF button Choose one of the followings 1 TIMER initial setting The w 2 AUTO OFF TIMER The auto off timer can be used SIMPLE TIMER The simple timer can be used 4 3 TIMER MODE OFF The timer mode cannot be used When the use of cloc TIMER cannot be used 4 Contact number setting for error situation To s ON OFF button 1 CALL OFF The set contact numbers a...

Page 94: ...ue The automatic mode is not displayed when the operation mode is selected The temperature range limit is not active Initial setting value The temperature range can be changed on cooling dry mode The temperature range can be changed on heating mode The temperature range can be changed on automatic mode The remote controller will be the main controller Initial setting value The remote controller wi...

Page 95: ...2 F3 F4 Req uest code Req uest Req uest Req uest code Ref address Req uest code Cursor Ref address Req uest code Cursor R eq uest c ode 0 0 4 1 1 2 1 HO W T O M O N I T O R T HE O P E R A T I O N D A T A 1 2 1 1 P A R 30 M A A P A R 31 M A A 1 2 M O N I T O R I N G T HE O P E R A T I O N D A T A B Y T HE R E M O T E C O N T R O L L E R OCH526C ...

Page 96: ...rant address Screen B 4 Press the CLOCK buttons and to set the desired req uest code No 5 Press the FILTER button to perform data req uest The req uested data will be displayed at C in the same way as in maintenance mode Data collected during operation of the remote controller will be displayed The collected data such as temperature data will not be updated automatically even if the data changes T...

Page 97: ...nit No 1 H eat mode 4 deg correction I ndoor unit I ntake air temperature Unit No 2 H eat mode 4 deg correction I ndoor unit I ntake air temperature Unit No 3 H eat mode 4 deg correction I ndoor unit I ntake air temperature Unit No 4 H eat mode 4 deg correction I ndoor unit Liq uid pipe temperature Unit No 1 I ndoor unit Liq uid pipe temperature Unit No 2 I ndoor unit Liq uid pipe temperature Unit...

Page 98: ...t Error postponement history 2 previous Outdoor unit Error postponement history 3 last but one 0 255 Refer to12 2 1 DetailContentsinReq uestCode Refer to12 2 1 DetailContentsinReq uestCode Refer to12 2 1 DetailContentsinReq uestCode Refer to12 2 1 DetailContentsinReq uestCode 0000 Not connected Exa mples V er 5 01 Auxi liary information displayed after version information Exa mples V er 5 01 A000 ...

Page 99: ...stor display TH3 TH6 TH7 TH8 Operation 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 Liq uidpipe1temperature TH3 attimeoferror Outdoor unit Liq uid pipe 2 temperature at time of error Outdoor unit 2 phase pipe temperat...

Page 100: ...ing time Fan motor ON time Indoor fan output value Sj value Indoor fan output value Pulsation ON OFF Indoor fan output value duty value Indoor unit Model setting information Indoor unit Capacity setting information Indoor unit SW3 information Wireless pair No indoor control board side setting Indoor unit SW5 information Indoor unit Microprocessor version information Indoor unit Microprocessor vers...

Page 101: ... B C D C 4 Relay output state Operation mode I ndoor unit C ontrol state R eq uest c ode 5 0 Data display Operation mode Display Operation mode 0 STOP FAN C COOL DRY H HEAT d DEFROST Relay output state Display Power currently Compressor Four way valve Solenoid valve supplied to compressor Unit No 4 state Unit No 3 state Unit No 2 state Unit No 1 state Display State 0 Normal 1 Preparing for heat op...

Page 102: ... Four way valve Compressor 0 1 2 3 4 5 6 9 A b C d E F 8 7 ON ON ON ON ON ON ON ON ON ON ON ON ON ON ON ON ON ON ON ON ON ON ON ON ON ON ON ON ON ON 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 P...

Page 103: ...ay R eq uest c ode 7 0 Data display Capacity 10 50 9 35 11 60 14 7 1 20 100 25 125 28 140 40 200 50 250 O utdoor unit S etting information R eq uest c ode 7 1 Data display Setting information 1 Setting information 2 0 0 Setting information 1 Display Defrost mode 0 Standard 1 For high humidity Setting information 2 Display Single Heat pump 3 phase cooling only 0 Single phase Heat pump 1 Cooling onl...

Page 104: ...0 1 1 1 0 1 0 1 1 1 1 1 0 1 1 1 0 0 1 1 1 1 1 0 1 1 1 1 0 1 1 1 1 1 1 1 1 1 1 1 O utdoor unit switc h setting disp lay S W 1 to S W 1 0 ex c ep t S W 3 R eq uest c odes 7 3 to 8 2 0 Switch OFF 1 Switch ON Data display SW5 1 2 3 4 0 0 0 0 00 00 1 0 0 0 00 01 0 1 0 0 00 02 1 1 0 0 00 03 0 0 1 0 00 04 1 0 1 0 00 05 0 1 1 0 00 06 1 1 1 0 00 07 0 0 0 1 00 08 1 0 0 1 00 09 0 1 0 1 00 0A 1 1 0 1 00 0b 0 ...

Page 105: ...t C ap ac ity setting information R eq uest c ode 1 6 3 Data display 0 0 See the table on the right Display Capacity setting state Display Capacity setting state 00 12 10 112 01 16 11 125 02 22 12 140 03 25 13 04 28 14 05 32 15 06 16 40 08 45 18 09 50 19 0A 56 1A 0b 63 1b 0C 1C 0d 80 1d 0E 9 0 1E 100 Display Pair No setting state 00 No 0 01 No 1 J41 disconnected 02 No 2 J42 disconnected 03 No 3 J4...

Page 106: ... check Refrigerant leak check Smooth maintenance Req uest code Smooth maintenance B egin Smooth maintenance Ex it Ref address Stable mode Cursor Address Ref address Stable mode Cool Heat Normal Cool Heat Normal Smooth maintenance Return Smooth maintenance Return Smooth maintenance Return Page Page Page COMP current COMP run time COMP On Off COMP freq uency A Hz Hr times Hr Ref address Cool Ref add...

Page 107: ...e air conditioner stopped skip to step 4 F ix ed Hz op eration The operating freq uency can be fixe d to stabilize operation of inverter model If the air conditioner is currently stopped start it by this operation 2 Press the MODE button to select the desired operation mode Display A 3 Press the FILTER button to confirm the setting Display D Waiting for stabilization HEAT STAB LE MODE STAB LE MODE...

Page 108: ... changer temperature Comp discharge temperature Outdoor ambient temperature INDOOR UNIT INLET TEMP INDOOR UNIT H EX C TEMP INDOOR UNIT FILTER USE H Indoor room temperature Heat ex changer temperature Filter operating time 12 340 hours Display C Waiting for response B linking After approx 10 seconds 1 1 Refrigerant address 00 Twin Refrigerant address 00 Outdoor unit Indoor unit 02 Indoor unit 01 Ou...

Page 109: ... Indoor heat ex changer temperature 7 Indoor intake air temperature Cool C lassific ation I tem R esult Inspection Temperature difference Heat Inspection Temperature difference Stable Unstable Stable Unstable Note 1 Fix ed Hz operation may not be possible under the following tempera ture ranges A In cool mode outdoor intake air temperature is 40 or higher or indoor intake air temperature is 23 or ...

Page 110: ...ntenance Req uest code F1 F2 F3 F4 Refrigerant leak check B egin Start refrigerant leak check Approx 20minutes F1 F2 F3 F4 Refrigerant leak check Add Add Check menu Page Cond Cond OK OK OK NG OK NG 1 2 3 D efault v alue R P 7 1 R P 5 0 R esetting th e initial learning data 1 3 4 I N I T I A L S E T T I N G S F O R R E F R I G E R A N T L E A K A G E D E T E C T I O N F U N C T I O N 1 3 4 1 P A R ...

Page 111: ...Display A GAS LEAK TEST START GAS LEAK JUDGE Refrigerant leakage detection judgement Refrigerant leakage detection initial teaching 1 How to selec t th e R efrigerant L eakage D etec tion mode Detection is possible regardless the unit s operation ON or OFF 1Press button for more than 3 seconds to switch to EASY MAINTENANCE mode Display A 2 How to start th e initial learning 2Press CLOCK button and...

Page 112: ...udgment of refrigerant leakage mode 1 5 How to reset the initial condition data When the unit is removed and installed again or refrigerant is charged additionally the Initial learning must be performed again by following procedure 1 Turn Main Power OFF 2 Connect the pin of CN31 to ON position on the outdoor controller board 3 Turn SW4 1 on the outdoor controller board to ON 4 Turn Main Power ON t...

Page 113: ...S HW 8 0 V HA R 3 B S U K P U HZ S HW 1 1 2 V HA P U HZ S HW 1 1 2 V HA R 2 U K P U HZ S HW 1 1 2 V HA R 2 B S U K P U HZ S HW 1 1 2 V HA R 3 U K P U HZ S HW 1 1 2 V HA R 3 B S U K P HO T O S I L L U S T R A T I O N 1 R emov ing th e serv ic e p anel and top p anel 2 R emov ing th e fan motor M F 1 M F 2 3 R emov ing th e elec tric al p arts b ox P h oto 2 1 P h oto 2 2 P h oto 3 P h oto 1 OCH526C...

Page 114: ...rep lac ing th ermistor 2 p h ase p ip e T H6 or th ermistor A mb ient T H7 rep lac e it togeth er 5 R emov ing th e th ermistor D isc h arge T H4 and th ermis tor C omp surfac e T H34 6 R emov ing th e th ermistor L iq uid T H3 th ermistor S uc tion T H32 and th ermistor R ef c h ec k T H33 P h oto 4 1 P h oto 4 2 P h oto 6 P h oto 5 OCH526C ...

Page 115: ...n installing th e linear ex p ansion v alv e c ov er it with a wet c loth to p rev ent it from h eating 1 2 0 C or more th en b raze th e p ip es so th at th e inside of p ip es are not ox idize d P h oto 7 1 P h oto 7 2 V HA R 2 ty p e 1 0 R emov ing th e h igh p ressure switc h 6 3H th e low p res sure switc h 6 3L and th e p ressure sensor 6 3HS N ote W h en installing th e h igh p ressure swit...

Page 116: ... R ec ov er refrigerant with out sp reading it in th e air O P E R A T I N G P R O C E D U R E P HO T O S 1 1 R emov ing th e reac tor D C L and c ap ac itor C B R emov ing th e reac tor R emov ing th e c ap ac itor P h oto 9 P h oto 8 OCH526C ...

Page 117: ...O P E R A T I N G P R O C E D U R E P HO T O S 1 3 R emov ing th e p ower rec eiv er N ote R ec ov er refrigerant with out sp reading it in th e air P h oto 1 0 OCH526C ...

Page 118: ... 2 U K P U HZ S HW 1 4 0 Y HA R 2 B S U K P U HZ S HW 1 4 0 Y HA R 3 U K P U HZ S HW 1 4 0 Y HA R 3 B S U K 3 R emov ing th e elec tric al p arts b ox 1 R emov ing th e serv ic e p anel and top p anel 2 R emov ing th e fan motor M F 1 M F 2 N ote D ue to a p arts sh aring th e fan motor for serv ic e h as longer lead wires U p on rep lac ement tie up any ex c essiv e lead wires in a b undle th en ...

Page 119: ... 4 D isassemb ling th e elec tric al p arts b ox 1 2 3 1 2 3 4 5 6 7 N ote W h en reassemb ling th e elec tric al p arts b ox make sure th e wirings are c orrec t P h oto 4 1 1 P h oto 4 2 3 2 A P h oto 4 3 5 4 P h oto 4 4 P h oto 4 5 6 B 7 OCH526C ...

Page 120: ...rep lac ing th ermistor 2 p h ase p ip e T H6 or th ermistor A mb ient T H7 rep lac e it togeth er 6 R emov ing th e th ermistor D isc h arge T H4 and th ermis tor C omp surfac e T H34 7 R emov ing th e th ermistor L iq uid T H3 th ermistor S uc tion T H32 and th ermistor R ef c h ec k T H33 P h oto 5 1 P h oto 5 2 P h oto 7 P h oto 6 OCH526C ...

Page 121: ...en installing th e linear ex p ansion v alv e c ov er it with a wet c loth to p rev ent it from h eating 1 2 0 C or more th en b raze th e p ip es so th at th e inside of p ip es are not ox idize d 1 1 R emov ing th e h igh p ressure switc h 6 3H th e low p res sure switc h 6 3L and th e p ressure sensor 6 3HS N ote W h en installing th e h igh p ressure switc h c ov er it with a wet c loth to p r...

Page 122: ...0 N ote 1 T h e reac tor is v ery h eav y 4 kg B e c areful wh en h andling it N ote 2 T h e reac tor b ox is also remov ab le O P E R A T I N G P R O C E D U R E P HO T O S P h oto 1 2 1 8 9 P h oto 1 2 2 1 P h oto 1 2 2 2 Y HA R 2 ty p e P h oto 1 2 3 0 OCH526C ...

Page 123: ... T O S 1 3 R emov ing th e c omp ressor M C N ote R ec ov er refrigerant with out sp reading it in th e air 1 4 R emov ing th e p ower rec eiv er N ote R ec ov er refrigerant with out sp reading it in th e air P h oto 1 3 P h oto 1 4 OCH526C ...

Page 124: ...C ...

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Mitsubishi Electric PUHZ-HW112YHA-BS, Service Manual

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