Mitsubishi Electric Mr. Slim PU-SHW230YKA Service Manual Download Page 49

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7. Removing the 4-way valve coil (21S4) and linear expan-

sion valve coil (LEV-A, LEV-B, LEV-C)

(1) Remove the service panel. (See Photo 1)
(2) Remove the top panel. (See Photo 1)
(3) Remove the electrical parts box. (See Photo 4)

[Removing the 4-way valve coil]

(4) Remove 4-way valve coil fixing screw (M4 × 6).
(5) Remove the 4-way valve coil by sliding the coil toward you.

[Removing the linear expansion valve coil]

(4) Remove 3 right side panel fixing screws (5 × 12) in the

rear of the unit then remove the right side panel.

(5) Remove the linear expansion valve coil by sliding the coil

upward.

8. Removing the 4-way valve

(1) Remove the service panel. (See Photo 1)
(2) Remove the top panel. (See Photo 1)
(3) Remove the electrical parts box. (See Photo 4)
(4) Remove 3 valve bed fixing screws (4 × 10), 4 ball valve

and stop valve fixing screws (5 × 16) then remove the
valve bed.

(5) Remove 3 right side panel fixing screws (5 × 12) in the

rear of the unit then remove the right side panel.

(6) Remove the 4-way valve coil.
(7) Recover refrigerant.
(8) Remove the welded part of 4-way valve.

9. Removing the linear expansion valve

(1) Remove the service panel. (See Photo 1)
(2) Remove the top panel. (See Photo 1)
(3) Remove 3 valve bed fixing screws (4 × 10), 4 ball valve

and stop valve fixing screws (5 × 16) then remove the
valve bed.

(4) Remove 3 right side panel fixing screws (5 × 12) in the

rear of the unit then remove the right side panel.

(5) Remove the linear expansion valve coil.
(6) Recover refrigerant.
(7) Remove the welded part of linear expansion valve.

Figure 1

4-way
valve coil
(21S4)

Note 1: Recover refrigerant without spreading it in

the air.

Note 2: The welded part can be removed easily by

removing the right side panel.

Note 3: When installing the parts of refrigerant

circuit, cover it with a wet cloth to prevent
it from heating (120°C or more), then braze
the pipes so that the inside of pipes are
not oxidized.

Linear expansion
valve coil (LEV-C)

Linear
expansion
valve coil
(LEV-A)

OPERATING PROCEDURE

PHOTOS

Linear expansion valve

4-way valve
coil fixing
screw

4-way valve

Linear
expansion
valve coil
(LEV-B)

OCH534

Summary of Contents for Mr. Slim PU-SHW230YKA

Page 1: ...SPECIFICATIONS 11 7 REFRIGERANT SYSTEM DIAGRAM 13 8 TROUBLESHOOTING 14 9 DISASSEMBLY PROCEDURE 47 September 2012 Note This manual describes only service data of the outdoor unit Refer to Technical manual of ATW I F and FTC RoHS compliant products have G mark on the spec name plate R410A PUHZ SHW230YKA PARTS CATALOG OCB534 Model name PUHZ SHW230YKA Service Ref PUHZ SHW230YKA ...

Page 2: ... leaks during operation If refrigerant comes into contact with a flame poisonous gases will be released 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 uni...

Page 3: ...arged from liquid phase Gravimeter Unit 3 Service tools Use the below service tools as exclusive tools for R410A refrigerant No Tool name Specifications 1 Gauge manifold Only for R410A Use the existing fitting specifications UNF1 2 Use high tension side pressure of 5 3 MPa G or over 2 Charge hose Only for R410A Use pressure performance of 5 09 MPa G or over 3 Electronic scale 4 Gas leak detector U...

Page 4: ...gree of vacuum Vacuum valve prevents back flow of oil and refri gerant to thermistor vacuum gauge Refrigerant charge Tool exclusive for R410A Tool exclusive for R410A Tool for HFC refrigerant Tool exclusive for R410A Tool exclusive for R410A Tool exclusive for R410A Tool exclusive for R410A Tools for other refrigerants can be used if equipped with adap ter for reverse flow check Tools for other re...

Page 5: ... 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 7 C Outsi...

Page 6: ...lve Compressor Hermetic scroll Model ANB66FJNMT Motor output kW 4 7 Start type Inverter Protection devices HP switch LP switch Discharge thermo Comp surface thermo Oil Model L 1 7 FV50S Crankcase heater W Heat exchanger Air Plate fin coil Water Plate heat exchanger Fan Fan drive No Propeller fan 2 Fan motor output kW 0 150 2 Air flow m min 140 CFM 4 940 Defrost method Reverse cycle Noise level SPL...

Page 7: ...itional charge based on the following requirements Note If the calculation produces a negative number i e a minus charge of if calculation results in an amount that is less than the Additional charage amount for 50 m perform the additional charge using the amount shown in Additional charge amount for 50 m Amount of additional charge Main piping Liquid line size ø12 7 overall length 0 17 4 3 kg kg ...

Page 8: ...nlet temperature ºC 65 Condenser outlet temperature ºC 34 Water conditions Flow volume L min 57 3 65 9 Outlet water temperature ºC 7 35 Outdoor conditions Intake air temperature D B ºC 35 7 W B ºC 24 6 Piping length Main 2 5m Branch 2 5m 2 5m The unit of pressure has been changed to MPa based on international SI system The conversion factor is 1 MPa 10 2 kgf cm 3 4 CAPACITY CORRECTION Refrigerant ...

Page 9: ...ils 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 ø27Knockout Rear piping hole Knockou...

Page 10: ... Circuit Board RS Rush Current Protect Resistor CB1 CB2 Main Smoothing Capacitor Connection Terminal Noise Filter Circuit Board Connection Terminal L1 L2 L3 NI Power supply Connection Terminal Ground 52C Relay N F LI1 LI2 LI3 NI LO1 LO2 LO3 Connection Terminal L1 L2 L3 Power supply GD1 GD2 Controller Circuit Board C B TB C1 X52A Connection Terminal TB N1 SYMBOL NAME SYMBOL NAME SYMBOL NAME Connect...

Page 11: ...st the ground S3 terminal has DC 24 V against S2 terminal However 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 ea...

Page 12: ...ith stripe of yellow and green is available 3 In case of regular polarity connection S1 S2 S3 wire size is 1 5 mm2 4 In case of regular polarity connection S1 S2 S3 5 In the flat cables are connected as this picture they can be used up to 30 m 6 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 2 ...

Page 13: ... Reversing 4 way valve 21S4 Change the refrigerant circuit Heating Cooling and for Defrosting Charge plug Charge plug High pressure Low pressure For production test use 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 Seco...

Page 14: ...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 and etc Re check the symptom and check the installation environment refrigerant amount weather when the trouble occurred matters related to wiring and etc ...

Page 15: ...Symptom P1 Flow water TH1 sensor error P2 Refrigerant liquid Pipe TH2 sensor error P6 Freezing Overheating protection operation P9 Actual tank temp TH5 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 corresponding...

Page 16: ...ontinuously 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 connection of 63H connector on out door controller circuit board Refer to 8 7 2 Check the 63H side of connecting wire 3...

Page 17: ...outdoor unit connecting wire and 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 temp controller outdoor unit connecting wire of Interface unit Flow temp controller and outdoor units Check diameter and length of Interface u...

Page 18: ... 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 2 Check resistance value of thermistor TH4 TH34 or temperature...

Page 19: ...ercurrent is detected UF or UP error condition 1 Outdoor stop valve is closed 2 Decrease of power supply voltage 3 Looseness disconnection or converse 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 Outdoor power circuit board 4 Check compres...

Page 20: ...power circuit board 5 Defective input current detection circuit in outdoor power circuit board 6 Defective outdoor controller circuit board 1 Check the field facility for the power supply 2 Check the wiring between TB1 and out door noise filter circuit board 3 Check CN5 CNCT wiring 4 Replace outdoor noise filter circuit board 5 Replace outdoor power circuit board 6 Replace outdoor controller circu...

Page 21: ...ller 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 Prssure sensor 63HS SW2 Refer to 8 8 3 Replace outdoor controller board UH Current sensor error or input current error Abnormal if current senso...

Page 22: ...er could not find blank of transmission path for 6 seconds and could not transmit Error code E3 2 When remote controller receives the transmitted data same time and compares these data Abnormal if the data is judged to be different for 30 continuous times Error code E3 1 Abnormal if Interface unit Flow temp controller could not find blank of transmission path Error code E5 2 When Interface unit Fl...

Page 23: ...f and on again to check Replace outdoor controller circuit board if abnormality is displayed again EF Non defined error code This code is displayed when non defined error 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...

Page 24: ...re with remote controller in test run mode If there is ex tremely difference with actual pipe liquid 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 m...

Page 25: ...imer 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 An error code appears in the remote controller display The protection devices have operated to protect the FT...

Page 26: ...sure the resistance between the terminals with a tester At the ambient temperature 20 Solenoid valve coil 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...

Page 27: ...NF1 2 Fuse check Check the 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 VDC between 1 and 4 of the fan connector VDC DC250 330V TEST POINT VCC between 5 and 4 of the fan connector VCC DC15V Recover wiring Replace outdoor controller board Replace the fan motor Replace outdoor controller boar...

Page 28: ... 7 465k 2 B constant 4057 2 Rt 7 465exp 4057 273 t 393 1 1 20 250k 30 160k 40 104k 50 70k 60 48k 70 34k 80 24k 90 17 5k 100 13 0k 110 9 8k High temperature thermistor Thermistor Discharge pipe TH4 Thermistor Comp surface TH34 0 10 20 30 40 50 20 10 0 10 20 30 40 50 Temperature Resistance k 500 400 300 200 100 0 25 50 75 100 120 Temperature Resistance k 1 0 5 2 5 5 2 5 4 5 Vout V PRESSURE MPa 3 2 1...

Page 29: ...ed 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 4 4 3 2 1 1 Gray Orange Red Yellow Black 2 3 4 5 Connector LEV A LEV B LEV C DC12V Outdoor controller board Dri...

Page 30: ...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 attache...

Page 31: ... Thermistor Discharge TH3 Thermistor Liquid pipe TH7 6 Thermistor Ambient 2 phase pipe CNDC 280V 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 DC 0V when stopped DC 1 6 5V when operated SW7 Demand control setting CN51 External signal output Compressor operating signal Abnormal signal LEV A B C L...

Page 32: ...onnect to the earth CNAC1 CNAC2 AC230V Connect to the outdoor controller circuit board CNAC CNDC Connect to the outdoor controller circuit board CNDC LO1 LO2 LO3 POWER SUPPLY LO1 LO2 LO2 LO3 LO3 LO1 AC400V OUTPUT Connect to the outdoor power circuit board TB1 L1 L2 L3 CNCT Primary current Connect to the outdoor power circuit board CN5 CNL Connect to the ACL4 GD3 Connect to the earth OCH534 ...

Page 33: ...oothing capacitor CB1 TB U TB V TB W Connect to the compressor MC Voltage among phases 10V 400V AC TB L1 TB L2 TB L3 Connect to the outdoor noise filter circuit board LO1 LO2 LO3 400V AC TB N1 Connect to the smoothing capacitor CB2 CN7 Connect to the outdoor converter circuit board CN7 Brief Check of POWER MODULE W Usually they are in a state of being short circuited if they are broken Measure the...

Page 34: ...is 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 Forced 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 1 2 ...

Page 35: ...emand control 3 1 2 SW7 1 SW7 2 OFF 0 Operation stop 75 50 OFF ON OFF OFF ON Power consumption Demand switch ON SW9 3 SW9 4 OFF 3 C Initial setting 0 C 3 C 6 C ON ON OFF OFF OFF ON ON Ambient temp Model select Following SW5 6 reference w2 Power failure automatic recovery can be set by either remote controller or this DIP SW If one of them is set to ON Auto recovery activates Please set Auto recove...

Page 36: ...ow level sound priority mode Turn SW1 to off to release Low level sound priority mode and normal operation b On demand control Local wiring Demand control is available by external input In this mode power consumption is decreased within the range of usual 0 100 How to wire Basically the wiring is same with a Connect an SW 1 which is procured locally between Orange and Red 1 and 3 of the adapter fo...

Page 37: ...al receiving error is detected 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 det...

Page 38: ...ong terminals on compressor using a tester Check if outdoor unit has a short cycle on its air duct Compressor overcurrent breaking Start up 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 Check if connectors TH3 TH32 TH4 TH34 and TH7 6 on outdoo...

Page 39: ...d during replacement operation 3 When the display blinks Inspection 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 shor...

Page 40: ...git tens digit and ones digit are displayed by turns Example When 2450 hours 245 10 hours 0 5 secs 0 5secs 2 secs 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 50 LEV A opening pulse 0 480 0 50 w Omit the figures after the decimal fractions 0 480 When it is 100 pulse or more hundreds digit tens digit and ones digit are displayed by turns Example When 150 pulse 0 5 sec...

Page 41: ...mber and code 3 217 When the temperature is 100 or more the hundreds digit tens digit and ones digit are displayed by turns Example When 130 0 5 secs 0 5secs 2 secs A Code display Code display 0 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 0 999 Test run elapsed time 0 120 0 999 When it is 100 minutes or more...

Page 42: ... or less and temperature are displayed by turns 1 ON 2 3 4 5 6 Actual flow water temperature TH1 8 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 phase and defr...

Page 43: ... 3 4 5 6 1 ON 2 3 4 5 6 Outdoor heatsink temperature TH8 40 200 40 200 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 88 39 88 When the temperature is 0 or less and temperature are displayed by turns 2 cycles Number of defrost cycles 0 FFFE 0 ...

Page 44: ...ory 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 Heatsink 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 f...

Page 45: ...200 40 200 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 0 255 When the temperature is 100 C or more hundreds digit tens digit and ones digit are displayed by turns Example When 150 ...

Page 46: ... 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 Preventive cont...

Page 47: ...ook on the right Noise filter circuit board N F Terminal block TB2 Controller circuit board C B Terminal block TB1 Electrical parts box fixing screws Electrical parts box 1 Removing the service panel and top panel 1 Remove 3 service panel fixing screws 5 12 and slide the hook on the right downward to remove the service panel 2 Remove screws 3 for front 3 for rear 5 12 of the top panel and remove i...

Page 48: ...tdoor 2 phase pipe TH6 since they are combined together Refer to No 5 above to remove thermistor Outdoor 2 phase pipe Photo 7 Clamp Thermistor Outdoor 2 phase pipe TH6 6 Removing the thermistor Liquid pipe TH3 thermistor Discharge TH4 thermistor Suction pipe TH32 and thermistor Comp surface TH34 1 Remove the service panel See Photo 1 2 Disconnect the connectors TH3 white TH4 white TH32 black and T...

Page 49: ...ight side panel 6 Remove the 4 way valve coil 7 Recover refrigerant 8 Remove the welded part of 4 way valve 9 Removing the linear expansion valve 1 Remove the service panel See Photo 1 2 Remove the top panel See Photo 1 3 Remove 3 valve bed fixing screws 4 10 4 ball valve and stop valve fixing screws 5 16 then remove the valve bed 4 Remove 3 right side panel fixing screws 5 12 in the rear of the u...

Page 50: ...ressor inlet and outlet and remove the compressor Note Recover refrigerant without spreading it in the air Photo 9 Compressor MC Soundproof cover Compressor fixing nut Compressor terminal 10 Removing the high pressure switch 63H and low pressure switch 63L 1 Remove the service panel See Photo 1 2 Remove the top panel See Photo 1 3 Remove 3 right side panel fixing screws 5 12 in the rear of the uni...

Page 51: ...t 10 Remove 2 receiver leg fixing screws 4 10 Note Recover refrigerant without spreading it in the air Photo 11 Power receiver Inlet pipe Valve bed Valve bed fixing screw Outlet pipe OPERATING PROCEDURE PHOTOS 13 Removing the 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 pressure sensor 4 Remove the band that is fixing th...

Page 52: ... 3 MARUNOUCHI CHIYODA KU TOKYO 100 8310 JAPAN Copyright 2012 MITSUBISHI ELECTRIC CORPORATION Distributed in Sep 2012 No OCH534 Made in Japan New publication effective Sep 2012 Specifications are subject to change without notice ...

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