Mitsubishi Electric Mr.Slim PUHZ-SHW230YKA2 Service Manual Download Page 1 | Manualshive

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SERVICE MANUAL

CONTENTS

TECHNICAL CHANGES ...................................... 2

1. SAFETY PRECAUTION ................................... 3
2. SPECIFICATIONS ............................................ 5
3. DATA ............................................................... 7
4. OUTLINES AND DIMENSIONS ....................... 9
5. WIRING DIAGRAM ........................................ 10
6. WIRING SPECIFICATIONS ........................... 12
7. REFRIGERANT SYSTEM DIAGRAM ........... 14
8. TROUBLESHOOTING ................................... 15
9. DISASSEMBLY PROCEDURE ...................... 57

Note:

•

This manual describes

service data of the outdoor

unit only.

R410A

PARTS CATALOG (OCB594)

[Model Name]

PUHZ-SHW230YKA2

[Service Ref.]

PUHZ-SHW230YKA2

PUHZ-SHW230YKA2R1

PUHZ-SHW230YKA2R2

SPLIT-TYPE, AIR CONDITIONER

No. OCH594

REVISED EDITION-B

December 2018

OCH594 REVISED EDITION-A

is void.

Revision:

•

Added

PUHZ-SHW230YKA2R2

in REVISED EDITION-B.

•

Some descriptions have

been modified.

1
2
3
...
»

Summary of Contents for Mr.Slim PUHZ-SHW230YKA2

Page 1: ...HOOTING 15 9 DISASSEMBLY PROCEDURE 57 Note This manual describes service data of the outdoor unit only R410A PARTS CATALOG OCB594 Model Name PUHZ SHW230YKA2 Service Ref PUHZ SHW230YKA2 PUHZ SHW230YKA2R1 PUHZ SHW230YKA2R2 SPLIT TYPE AIR CONDITIONER No OCH594 REVISED EDITION B December 2018 OCH594 REVISED EDITION A is void Revision Added PUHZ SHW230YKA2R2 in REVISED EDITION B Some descriptions have ...

Page 2: ...s PUHZ SHW230YKA2 PUHZ SHW230YKA2R1 A compliance with ErP directive Lot6 has been authorized PUHZ SHW230YKA2R1 PUHZ SHW230YKA2R2 Power board controller board and noise filter board have been changed Quantity of refrigerant has been changed Unit weight has been changed ...

Page 3: ... 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 the specified refrigerant only Never use any refrigerant other than that specified Doing so may cause a burst an explosion or fire when the unit is being used serviced or disposed of Correct refrigerant is specified in the manuals and on the spec...

Page 4: ...e for R410A Gas leak detector Gas leak check Tool for HFC refrigerant Refrigerant recovery equipment Refrigerant recovery Tool exclusive for R410A Refrigerant cylinder Refrigerant charge Tool exclusive for R410A Safety charger Prevent compressor malfunction when charging refrigerant by spraying liquid refrigerant Tool exclusive for R410A Charge valve Prevent gas from blowing out when detaching cha...

Page 5: ... Dry bulb 2 C Outside air temperature Wet bulb 1 C Water temperature inlet outlet 30 C 35 C Heating A2 W45 Outside air temperature Dry bulb 2 C Outside air temperature Wet bulb 1 C Water temperature inlet outlet 40 C 35 C Heating A7 W35 Outside air temperature Dry bulb 7 C Outside air temperature Wet bulb 6 C Water temperature inlet outlet 30 C 35 C Heating A7 W45 Outside air temperature Dry bulb ...

Page 6: ...ing A35 W7 A 9 6 Power factor Heating A7 W35 95 Cooling A35 W7 95 Power supply phase voltage cycle 3 phase 400 V 50 Hz Max current A 26 0 20 Breaker size A 32 25 Outer casing Galvanized plate External finish Munsell 3Y 7 8 1 1 Refrigerant control Liner expansion valve Compressor Hermetic scroll Model ANB66FJNMT Motor output kW 4 7 Start type Inverter Protection devices HP switch LP switch Discharg...

Page 7: ...8 5 2 PUHZ SHW230YKA2R2 1 7 1 ATW ø12 7 1 4 2 8 4 2 5 6 7 0 ø9 52 0 8 1 7 2 6 3 5 ATA AHU ø12 7 1 4 2 8 4 2 5 6 7 0 8 4 ø9 52 0 8 1 7 2 6 3 5 4 4 1 Set the SW8 2 on controller board ON when the piping length is 10 m or less for models from PUHZ SHW230YKA2R2 3 2 Recharge refrigerant amount R410A Service Ref Operation method Liquid pipe size Total piping length one way Amount of recharge refrigerant...

Page 8: ...W 20 000 23 000 Input kW 9 01 6 31 Electrical circuit Outdoor unit PUHZ SHW230YKA2 Phase Hz 3 50 Voltage V 400 Current A 13 7 9 6 Refrigerant circuit Discharge pressure MPa 3 0 2 0 Suction pressure MPa 0 7 0 6 Discharge temperature ºC 79 73 Condensing temperature ºC 49 35 Suction temperature ºC 8 8 Evaporating temperature ºC 6 2 Evaporator inlet temperature ºC 7 Evaporator outlet temperature ºC 6 ...

Page 9: ... Piping Knockout Hole Details Power supply wiring hole ø27Knockout Front piping hole Knockout Front trunking hole Knockout Power supply wiring hole ø40Knockout 60 55 63 73 55 27 26 75 92 60 ø 9 2 Power supply wiring hole ø27Knockout Right piping hole Knockout Right trunking hole Knockout Power supply wiring hole ø40Knockout 75 50 26 27 63 73 29 92 55 92 60 ø 9 2 Power supply wiring hole ø27Knockou...

Page 10: ... CN4 WH CN5 RD WH FUSE1 FUSE2 WH RD RD MS 3 POWER SUPPLY 3N 400V 50Hz TO INDOOR UNIT TB1 L3 L2 L1 N 3 1 2 2 1 3 CNDC PK CNL BU 3 1 1 2 CNCT RD CNAC2 RD 3 1 CNAC1 WH BK BK LO1 LO2 LO3 LI1 LI2 LI3 NI RD WH BU BK GNYE GD2 GD1 RD WH BK N F TB2 DCL ACL4 S3 S2 S1 OG YE CY2 CY1 BN RD RD RS RD WH WH WH BK BK BK X52A BK BK TB P2 TB P1 TB C1 TB N1 CB1 CB2 W V MC U TB L1 TB L2 TB L3 SC U SC V SC W RD TH6 TH7...

Page 11: ...11 OCH594B PUHZ SHW230YKA2R2 ...

Page 12: ...owever between S3 and S1 these terminals are NOT electrically insulated by the transformer or other device Notes 1 Wiring size must comply with the applicable local and national code 2 Power supply cords and Indoor Outdoor unit connecting cords shall not be lighter than polychloroprene sheathed flexible cord Design 60245 IEC 57 3 Use an earth wire which is longer than the other cords so that it wi...

Page 13: ...le with stripe of yellow and green is available 2 In case of regular polarity connection S1 S2 S3 wire size is 1 5 mm2 3 In case of regular polarity connection S1 S2 S3 4 In the ﬂat cables are connected as this picture they can be used up to 30 m 5 Mentioned cable length is just a reference value It may be different depending on the condition of installation humidity or materials etc 3C Flat cable...

Page 14: ...way valve 21S4 Change the refrigerant circuit Heating Cooling and for Defrosting CHECK V Check valve P Sensor Pressure sensor 63HS For calculation of the condensing temperature from high pressure LEV A Linear expansion valve A Heating Secondary LEV Cooling Primary LEV LEV B Linear expansion valve B Heating Primary LEV Cooling Secondary LEV LEV C Linear expansion valve C For HIC heating only TH32 S...

Page 15: ...Not displayed Conduct troubleshooting and ascertain the cause of the trouble The trouble is not reoccurring Logged 1 Consider 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 ...

Page 16: ...tom P1 Flow water TH1 sensor error P2 Refrigerant liquid Pipe TH2 sensor error P6 Freezing Overheating protection operation P9 Actual tank temp TH5 THW5 for FTC2B sensor error Fb FTC unit control system error memory error etc E0 E5 Signal transmission failure between remote controller and FTC E6 EF Signal transmission failure between outdoor unit and FTC No trouble generated in the past FFFF No co...

Page 17: ...t the units cannot be repaired F5 63H connector open Abnormal if 63H connector circuit is open for 3 minutes continuously after power sup ply 63H High pressure switch 1 Disconnection or contact failure of 63H connector on outdoor controller circuit board 2 Disconnection or contact failure of 63H 3 63H is working due to defective parts 4 Defective outdoor controller cir cuit board 1 Check connectio...

Page 18: ...face unit Flow temp control ler Abnormal if the number cannot be checked automatically due to miswiring of Interface unit Flow temp controller outdoor unit connecting wire etc after power is turned on for 4 minutes 2 Abnormal if outdoor controller circuit board recognizes excessive number of Interface unit Flow temp controller Check disconnection or looseness or polarity of Interface unit Flow tem...

Page 19: ... and during defrosting 1 Disconnection or contact failure of connector TH4 TH34 on the outdoor controller circuit board 2 Defective thermistor 3 Defective outdoor controller circuit board 1 Check connection of connector TH4 TH34 on the outdoor controller circuit board Check breaking of the lead wire for thermistor TH4 TH34 Refer to 8 7 TEST POINT DIAGRAM 2 Check resistance value of thermistor TH4 ...

Page 20: ...cted UF or UP error condition 1 Outdoor stop valve is closed 2 Decrease of power supply voltage 3 Looseness disconnection or reverse of compressor wiring connection 4 Defective compressor 5 Defective outdoor power circuit board 1 Open stop valve 2 Check facility of power supply 3 Correct the wiring U V W phase to compressor Refer to 8 7 TEST POINT DIAGRAM Outdoor power circuit board 4 Check compre...

Page 21: ...equency is more than or equal to 40 Hz or compressor current is more than or equal to 6 A 1 L1 phase open 2 Disconnection or loose connection between TB1 and outdoor noise filter circuit board 3 Disconnection or loose connection of CN5 on the outdoor power circuit board CNCT on the outdoor noise filter board 4 Defective ACCT AC current trans on the outdoor power circuit board 5 Defective input cur...

Page 22: ...nnection or contact failure of connector 63HS on the outdoor controller circuit board 2 Defective pressure sensor 3 Defective outdoor controller circuit board 1 Check connection of connector 63HS on the outdoor controller circuit board Check breaking of the lead wire for thermistor 63HS 2 Check pressure by microprocessor Pressure sensor 63HS SW2 Refer to 8 8 FUNCTION OF SWITCHES CONNECTORS AND JUM...

Page 23: ...dged to be different for 30 continuous times Check code E3 1 Abnormal if Interface unit Flow temp controller could not find blank of transmission path Check code E5 2 When Interface unit Flow temp controller receives the transmitted data same time and compares these data Abnormal if the data is judged to be different for 30 continuous times Check code E5 1 3 Diagnose remote controller a When RC OK...

Page 24: ...nd on again to check Replace outdoor controller circuit board if abnormality is displayed again EF Non defined check code This code is displayed when non defined check code is received 1 Noise has entered transmission wire of remote controller 2 Noise has entered Interface unit Flow temp controller outdoor unit connecting wire 12 Turn the power off and on again to check Replace Interface FTC or ou...

Page 25: ...quid temperature replace PCB of Interface unit Flow temp controller Turn the power off and on again to operate after check P6 Freezing overheating protection is working 1 Freezing protection Cooling mode The unit is in 6 minute resume preven tion mode if pipe temperature stays under 15 for 3 minutes 3 minutes after the compressor started Abnormal if it stays under 15 for 3 minutes again within 16 ...

Page 26: ...nnot be set Are timer settings invalid If the timer can be set WEEKLY SIMPLE or AUTO OFF appears in the remote controller display PLEASE WAIT appears in the remote controller display The initial settings are being performed Wait approximately 3 minutes If the remote controller is not only for FTC change it A check code appears in the remote controller display The protection devices have operated t...

Page 27: ...ls with a tester At the ambient temperature 20 Solenoid valve 4 way valve 21S4 Motor for compressor MC Linear expansion valve LEV A LEV B LEV C Normal Abnormal Open or short Abnormal Open or short 0 37 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 mo...

Page 28: ...e fuse F5 on outdoor controller board Power supply check Remove the connector CNF1 2 Measure the voltage in the outdoor controller circuit board TEST POINT 1 VDC between 1 and 4 of the fan connector VDC 250 330 V DC TEST POINT 2 VCC between 5 and 4 of the fan connector VCC 15 V DC Correct the wiring Replace the outdoor controller board Replace the defective fan motor Replace outdoor controller boa...

Page 29: ...24 kΩ 90 17 5 kΩ 100 13 0 kΩ 110 9 8 kΩ High temperature thermistors Thermistor Discharge TH4 Thermistor Comp Surface TH34 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 1 3 2 1 WH BU BK SENSOR 5 V DC GND 63HS Vout MICRO PROCESSOR CONTROLLER BOARD 3 1 5 V DC ...

Page 30: ...lve is locked more sound can be heard No sound is heard when the pulse number moves from B to A in case coil is burnt out or motor is locked by open phase Sound can be detected by placing the ear against the screw driv er handle while putting the screw driver to the linear expansion valve LEV M 1 6 ø4 ø4 ø3 ø2 ø1 1 GY OG RD YE BK 2 3 4 5 Connector LEV A LEV B LEV C 12 V DC Outdoor controller board...

Page 31: ...stress Be sure to attach the stopper A How to attach the coil Hold the lower part of the main body shown as A firmly so that the main body does not move and attach the coil by inserting it downward into the main body Then securely attach the coil stop per to main body At this time be careful that stress is not added to lead wire and main body is not wound by lead wire If the stopper is not firmly ...

Page 32: ...hermistor Discharge TH3 Thermistor Liquid TH7 6 Thermistor Ambient 2 phase pipe CNDC 280 V DC 1 3 Noise filter circuit board VFG Voltage between right pins of PC5C and PC5D pin 3 and pin 4 Same as CNF17 4 VSP Voltage between pins of C5A C5B 0 V DC when stopped 1 6 5 V DC when oper ated SW7 Demand control setting CN51 External signal output Compressor operating signal Abnormal signal LEV A B C Line...

Page 33: ... Input of external contact point TH4 Thermistor Discharge TH3 Thermistor Liquid TH7 6 Thermistor Ambient 2 phase pipe CNDC 280 V DC 1 3 Noise filter circuit board VFG Voltage between right pins of PC5C and PC5D pin 3 and pin 4 Same as CNF17 4 VSP Voltage between pins of C5A C5B 0 V DC when stopped 1 6 5 V DC when oper ated SW7 Demand control setting CN51 External signal output Compressor operating...

Page 34: ...3 LO3 LO1 400 V AC OUTPUT Connect to the outdoor power circuit board TB1 L1 L2 L3 CNCT Primary current Connect to the outdoor power circuit board CN5 CNAC1 230 V AC Connect to the outdoor controller circuit board CNAC CNAC2 230 V AC Connect to the outdoor controller circuit board CNAC PCB maker trade mark lot number UL mark CNL Connect to the ACL4 GD1 Connect to the earth GD2 Connect to the earth ...

Page 35: ...O1 LO2 LO2 LO3 LO3 LO1 400 V AC OUTPUT Connect to the outdoor power circuit board TB1 L1 L2 L3 CNCT Primary current Connect to the outdoor power circuit board CN5 CNAC1 230 V AC Connect to the outdoor controller circuit board CNAC CNAC2 230 V AC Connect to the outdoor controller circuit board CNAC CNL Connect to the ACL4 EI Connect to the earth E2 Connect to the earth CNDC Connect to the outdoor c...

Page 36: ... the smoothing capacitor CB1 CB2 TB P2 Connect to the smoothing capacitor CB1 TB U TB V TB W Connect to the compressor MC Voltage among phases 10 400 V AC TB L1 TB L2 TB L3 Connect to the outdoor noise filter circuit board LO1 LO2 LO3 400 V AC TB N1 Connect to the smoothing capacitor CB2 CN7 Connect to the outdoor converter circuit board CN7 Brief Check of POWER MODULE If they are short circuited ...

Page 37: ...rcuit board CNCT CN4 Connect to the outdoor controller circuit board CN4 CN2 Connect to the outdoor controller circuit board CN2 1 5 Power circuit board Transmitting signal to the controller board 0 5 V DC 2 5 Zero cross signal 0 5 V DC 3 4 Not used 6 5 16 V DC 7 5 16 V DC 5 1 2 6 7 TB U TB V TB W Connect to the compressor MC Voltage among phases 10 400 V AC Diode module U P2 V W N2 L3 N1 L1 P1 L2...

Page 38: ...in This depends on the service conditions Switch Type of switch DIP switch Push switch SW1 1 2 No Function Effective timing Action by the switch operation Manual defrost 1 Start Normal 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...

Page 39: ...tting 0 C 3 C 6 C ON ON OFF OFF OFF ON ON Ambient temp Model select Following SW5 6 reference Mode select 2 1 2 3 4 5 6 No function Power failure automatic recovery 1 No function Model select Defrost Hz o 0 54 For high humidity Valid Normal Normal Normal 1 Power failure automatic recovery can be set by either remote controller or this DIP SW If one of them is set to ON Auto recovery activates Plea...

Page 40: ... diagram example low noise mode B On site arrangement C External input adapter PAC SC36NA E X Relay D Outdoor unit control board E Maximum 10 m F Power supply for relay A SW1 OG 1 3 BN RD E B F CNDM X X C D A Circuit diagram example Demand function B On site arrangement X Y Relay C External input adapter PAC SC36NA E D Outdoor unit control board E Maximum 10 m F Power supply for relay By performin...

Page 41: ... by outdoor unit I F or FTC or outdoor unit communication error transmitting error is detected by outdoor unit Remote controller signal receiving error is detected by remote controller Remote controller transmitting error is detected by remote controller Remote controller signal receiving error is detected by I F or FTC unit Remote controller transmitting error is detected by I F or FTC unit 1 Che...

Page 42: ...Check leakage of refrigerant Compressor overcurrent breaking Startup locked Compressor overcurrent breaking Abnormality of current sensor P B Abnormality of power module Open short of outdoor thermistors TH4 TH34 Open short of outdoor thermistors TH3 TH32 TH6 TH7 and TH8 1Check if connectors TH3 TH32 TH4 TH34 and TH7 6 on outdoor controller board and connector CN3 on outdoor power board are not di...

Page 43: ...s being postponed 3 When the display blinks Check code is displayed when compressor stops due to the work of protection devices Display Inspection unit 0 Outdoor unit 1 Interface or FTC Display Contents to be inspected During operation U1 Abnormal high pressure 63H operated U2 Abnormal high discharging temperature high comp surface temperature shortage of refrigerant U3 Open short of outdoor unit ...

Page 44: ...hundreds digit tens digit and ones digit are displayed by turns Example When 2450 hours 245 10 hours 0 5 s 0 5 s 2 s 1 ON 2 3 4 5 6 1 ON 2 3 4 5 6 1 ON 2 3 4 5 6 Compressor operating current 0 to 50 LEV A opening pulse 0 to 480 0 to 50 Note Omit the figures after the decimal fractions 0 to 480 When it is 100 pulse or more hundreds digit tens digit and ones digit are displayed by turns Example When...

Page 45: ... unit number and code 3 to 217 When the temperature is 100 or more the hundreds digit tens digit and ones digit are displayed by turns Example When 130 0 5 s 0 5 s 2 s A Code display Code display 0 to 20 When no error history 0 and are displayed by turns When no error history 0 and are displayed by turns 1 ON 2 3 4 5 6 Thermo ON time 0 to 999 Test run elapsed time 0 to 120 0 to 999 When it is 100 ...

Page 46: ...ature is 0 or less and temperature are displayed by turns 1 ON 2 3 4 5 6 Actual flow water temperature TH1 8 to 39 Setting details The tens digit Total display for applied setting The ones digit H P Cooling only Single phase 3 phase Display details 0 H P 1 Cooling only 0 Single phase 2 3 phase Setting details Defrosting switch Display details 0 Normal 1 For high humidity Example When heat pump 3 p...

Page 47: ...ay Unit 1 ON 2 3 4 5 6 1 ON 2 3 4 5 6 Outdoor heat sink temperature TH8 40 to 200 40 to 200 When the temperature is 0 or less and temperature are displayed by turns When the thermistor detects 100 or more hundreds digit tens digit and ones digit are displayed by turns Ambient temperature TH7 39 to 88 39 to 88 When the temperature is 0 or less and temperature are displayed by turns 2 cycles Number ...

Page 48: ...y 0 and are displayed by turns 3 Liquid pipe thermistor TH3 4 Discharge pipe thermistor TH4 6 2 phase pipe thermistor TH6 7 Ambient temp thermistor TH7 8 Heat sink thermistor TH8 32 Suction pipe thermistor TH32 34 Comp surface thermistor TH34 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 Error thermistor display When there is no error thermistor is displayed Code display Operation fr...

Page 49: ... 40 to 200 40 to 200 When the temperature is 0 C or less and temperature are displayed by turns When the temperature is 100 C or more hundreds digit tens digit and ones digit are displayed by turns 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 0 to 255 When the temperature is 100 C or more hundreds digit tens digit and ones digit are displayed by turns Exam...

Page 50: ...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 activated Primary current control Preve...

Page 51: ... TH6 Outdoor unit Outside air temperature TH7 Outdoor unit Heatsink 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 ...

Page 52: ...ent history 1 latest Outdoor unit Error postponement history 2 previous Outdoor unit Error postponement history 3 last but one Examples Ver 5 01 Auxiliary information displayed after version information Examples Ver 5 01 A000 Displays postponement code is displayed if no postponement code is present Displays postponement code is displayed if no postponement code is present Displays postponement co...

Page 53: ...e 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 phase pipe temperature TH6 at time of error Outdoor unit Outside air temperature TH7 at time of error Outdoor unit Heat...

Page 54: ...e 0 STOP FAN C COOL DRY H HEAT d DEFROST Relay output state Display Power currently Compressor 4 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 Frequenc...

Page 55: ...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 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...

Page 56: ...00 50 250 Outdoor unit Setting information Request code 71 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 only 2 3 phase Heat pump 3 Cooling only ...

Page 57: ...ller circuit board in the electrical parts box See Photo 3 7 Release the lead wires from the clamps on the motor support and the separator 8 Release the lead wires from the hole on the separator 9 Remove fan motor fixing screws 4 for front 5 20 to detach the fan motor Upper and lower 10 When installing the fan motor fit the lead wire into the hook under the fan motor and fix it with clamps firmly ...

Page 58: ...the electrical parts box by pulling it upward The electrical parts box is fixed with 2 hooks on the left and 1 hook on the right Photo 3 YKA2 YKA2R1 type YKA2R2 type 4 Removing the thermistor 2 phase pipe TH6 1 Remove the service panel See Photo 1 2 Remove the top panel See Photo 1 3 Disconnect the connectors of TH6 and TH7 red on the controller circuit board in the electrical parts box 4 Loosen t...

Page 59: ...H4 white TH32 black and TH34 red on the controller circuit board in the electrical parts box 3 Release the lead wires from the cable strap on the electrical parts box Cut the cable tie bundling TH3 TH4 and TH34 to release the lead wires 4 Loosen the clamp for the lead wire on separator Removing the thermistor Liquid pipe TH3 4 Pull out the thermistor Liquid TH3 from the sensor holder Removing the ...

Page 60: ... ball valve and stop valve fixing screws 5 16 then remove the valve bed 5 Remove cover panel front fixing screws 2 for front 5 12 to remove the cover panel front 6 Remove right side panel fixing screws 3 for heat exchanger 5 12 and 2 cover panel rear fixing screws 5 12 in the side and rear of the unit both of them are fixed in the base then remove the right side panel and the cover panel together ...

Page 61: ...de of pipes are not oxidized YKA2R2 type Figure 5 YKA2 YKA2R1 type 11 Removing the compressor MC 1 Remove the service panel See Photo 1 2 Remove the top panel See Photo 1 3 Remove 2 front cover panel fixing screws 5 12 and remove the front cover panel 4 Remove 4 back cover panel fixing screws 5 12 and remove the back cover panel 5 Remove the electrical parts box See Photo 3 6 Remove 3 valve bed fi...

Page 62: ...the high pressure sensor 63HS 1 Remove the service panel See Photo 1 2 Remove the top panel See Photo 1 3 Pull out the lead wire of high pressure sensor 4 Remove the band that is fixing the rubber mount and the sensor 5 Recover refrigerant 6 Remove the welded part of high pressure sensor Note 1 Recover refrigerant without spreading it in the air Note 2 The welded part can be removed easily by remo...

Page 63: ...63 OCH594B ...

Page 64: ...KU TOKYO 100 8310 JAPAN Copyright 2015 MITSUBISHI ELECTRIC CORPORATION Issued Dec 2018 No OCH594 REVISED EDITION B Issued Oct 2017 No OCH594 REVISED EDITION A Published Jul 2015 No OCH594 Made in Japan Specifications are subject to change without notice ...

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