Mitsubishi Electric PUHZ-FRP71VHA2R1 Service Manual Download Page 86

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OPERATING PROCEDURE

PHOTOS/FIGURES

7. Removing the 4-way valve coil (21S4), LEV coil (LEV(A),

LEV(B), LEV(C)) and solenoid valve coil (SV1, SV2, SV3)

(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 LEV coil]

(4)

Remove the LEV coil by sliding the coil upward.

[Removing the solenoid valve coil]

(4)

Remove the solenoid valve coil fixing screw.

(5)

Remove the solenoid valve coil by sliding the coil
upward.

Photo 8

Photo 9

Figure 1

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 the valve bed. (See Photo 12)
(5)  Remove the side panel (R) fixing screws (3 for front, 5 ×

12) in the rear of the unit and then remove the side panel (R).

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

Note 1: Recover refrigerant without spreading it in the air.

Note 2: The welded part can be removed easily by

removing the side panel (R).

Note 3: When installing the 4-way valve, 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.

9. Removing the LEV

Note 1: Recover refrigerant without spreading it in the air.

Note 2: The welded part can be removed easily by

removing the side panel (R).

Note 3: When installing the LEV, 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.

10.

Removing the SV

Note 1: Recover refrigerant without spreading it in the air.

Note 2: The welded part can be removed easily by

removing the side panel (R).

Note 3: When installing the SV, 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.

4-way valve coil
fixing screw

4-way valve

High pressure
switch (63H)

LEV-A

4-way valve

LEV coil
(LEV-A)

4-way valve
coil (21S4)

LEV coil
(LEV-B)

High pres-
sure switch
(63H)

Thermistor
<Discharge>
(TH4)

Thermistor
<Comp. surface>
(TH33)

LEV coil
(LEV C)

LEV-B

LEV-C

SV3

SV1, 2

Solenoid valve coil
fixing screws

Solenoid valve coil 2
(SV2)
*Tube: Transparent

Solenoid valve coil 1
(SV1)
*Tube: Black

Solenoid valve
coil 3 (SV3)

OCH665B

Summary of Contents for PUHZ-FRP71VHA2R1

Page 1: ...RIGERANT SYSTEM DIAGRAM 15 10 TROUBLESHOOTING 17 11 FUNCTION SETTING 68 12 MONITORING THE OPERATION DATA BY THE REMOTE CONTROLLER 72 13 EASY MAINTENANCE FUNCTION 82 14 DISASSEMBLY PROCEDURE 84 Note This manual describes only service data of the outdoor units No OCH665 REVISED EDITION B October 2019 SPLIT TYPE HEAT PUMP AIR CONDITIONERS Note PUHZ FRP71VHA2R1 has been added in REVISED EDITION B OCH6...

Page 2: ... MEC EHSC VM2C R1 R2 R3 UK EHSC VM2EC R1 R2 R3 UK EHSC VM6C R1 R2 R3 UK EHSC VM6EC R1 R2 R3 UK EHSC YM9C R1 R2 R3 UK EHSC YM9EC R1 R2 R3 UK EHSC TM9C R1 R2 R3 UK EHSC MEC R1 R2 R3 UK OCH571 OCB571 EHST20C VM2D EHST20C VM6D EHST20C YM9D EHST20C TM9D EHST20C YM9ED EHST20C MED EHST20C VM2D UK EHST20C VM6D UK EHST20C YM9D UK EHST20C TM9D UK EHST20C YM9ED UK EHST20C MED UK OCH714 OCB714 EHSC VM2D EHSC ...

Page 3: ...r If the refrigerant is charged from gas phase composition change may occur in refrigerant and the efficiency will be lowered Do not use refrigerant other than R410A If other refrigerant R22 etc is used chlorine in refrige rant can cause deterioration of refrigerant oil etc Use a vacuum pump with a reverse flow check valve Vacuum pump oil may flow back into refrigerant cycle and that can cause det...

Page 4: ...with the cylinder of syphon stood vertically Refrigerant is charged from liquid phase Electronic weighing scale 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 3MPa G or over 2 Charge hose Only for R410A Use pressur...

Page 5: ...he existing pipe thickness and check for damage The existing pipe thickness meets specifica tions and the pipes are not damaged Check if the existing air conditioner can operate After operating the cooling system for about 30 minutes do a pump down work Disconnect the existing air conditioner from the pipes Attach the new air conditioner Test run The existing pipes cannot be reused Use new pipes I...

Page 6: ... 5 8 15 88 29 0 27 0 3 4 19 05 23 3 3 4 19 05 36 0 3 Tools for R410A The following table shows whether conventional tools can be used or not Tools and materials Use R410A tools Can R22 tools be used Can R407C tools be used Gauge manifold Air purge refrigerant charge and operation check Tool exclusive for R410A Charge hose Tool exclusive for R410A Gas leak detector Gas leak check Tool for HFC refri...

Page 7: ...ar Expansion Valve always control the optimal refrigerant level regardless of the length Total 30 m maximum and 5 m minimum of piping The additional refrigerant charging work during installation often causes problems It is completely eliminated by chargeless system This unique system improves the quality and reliability of the work done It also helps to speed up the installation time PUHZ FRP71VHA...

Page 8: ...er fan x 1 Fan motor output kW 0 086 Airflow K min CFM 50 1 760 Defrost method Reverse cycle Noise level ATA Cooling HR Cooling dB 47 TA Heating ATW Heating dB 49 Dimensions W mm inch 950 37 3 8 D mm inch 330 25 13 7 8 H mm inch 943 37 1 8 Weight kg lb 73 161 Refrigerant R410A Charge kg lb 3 8 8 4 Oil Model L 0 70 FV50S REFRIGERANT PIPING Pipe size O D ATA Liquid mm inch 9 52 3 8 Gas mm inch 15 88...

Page 9: ... charged 10m 20m 30m 40m 50m 60m 75m PUHZ FRP71VHA2 PUHZ FRP71VHA2R1 3 4 3 6 3 8 4 4 5 0 5 6 3 8 5 2 COMPRESSOR TECHNICAL DATA 5 3 NOISE CRITERION CURVES 1 5m 1m MICROPHONE UNIT GROUND 90 80 70 60 50 40 30 20 10 63 125 250 500 1000 2000 4000 8000 APPROXIMATE THRESHOLD OF HEARING FOR CONTINUOUS NOISE NC 60 NC 50 NC 40 NC 30 NC 20 NC 70 OCTAVE BAND SOUND PRESSURE LEVEL dB 0 dB 0 0002 µbar BAND CENTE...

Page 10: ...0 230 Current A 0 17 0 15 0 17 Outdoor unit PUHZ FRP71VHA2 Phase Hz 1 50 1 50 1 50 1 50 Voltage V 230 230 230 230 Current A 9 14 9 22 8 81 13 97 Refrigerant circuit Discharge pressure MPa 2 79 2 46 2 13 3 39 Suction pressure MPa 0 96 0 71 0 70 0 94 Discharge temperature C 71 62 53 80 Condensing temperature C 47 42 37 57 Suction temperature C 10 0 0 9 Ref pipe length m 5 5 5 5 5 5 5 5 ATA indoor si...

Page 11: ...cates the cylinder hydro unit connection side for the following parts Terminal bed for the connecting cables S1 S2 S3 Stop valves gas and liquid for the refrigerant connection BK79F295H01 Over 100mm Over 500mm Over 10mm Over 10mm FREE Service space 10 Over 100 Over 500 Over 500 Over Foundation bolt height Less than FOUNDATION 30 The diagram below shows a basic example Explanation of particular det...

Page 12: ...12 OCH665B 7 WIRING DIAGRAM PUHZ FRP71VHA2 PUHZ FRP71VHA2R1 ...

Page 13: ...57 S1 S2 S3 S1 S2 S3 A Control Outdoor Unit 3 poles isolator Power supply Isolator A Control Indoor Unit Outdoor unit power supply N single 50 Hz 230 V Outdoor unit input capacity Main switch Breaker 1 25 A Wiring Wire No size mm Outdoor unit power supply 3 Min 2 5 Indoor unit Outdoor unit Cylinder or Hydrobox Outdoor unit 2 3 1 5 Polar Indoor unit Outdoor unit earth Cylinder or Hydrobox Outdoor u...

Page 14: ...P switch settings when using separate indoor unit outdoor unit power supplies only Indoor unit specifications Required Required Required Electric heater For models with heater Connectors connections when shipped from the factory are for indoor unit power supplied from outdoor unit Indoor unit power supplied from outdoor unit when shipped from factory If the indoor and outdoor units have separate p...

Page 15: ... in ATW Heating LEV C Charge plug Accumulator TH6 LEV A TH3 High pressure sensor 63HS High pressure switch 63H Muffler Charge plug Stop valve Stop valve Stop valve Stop valve Service port Service port Service port Service port Refrigerant GAS pipe connection 5 8F TH33 SV2 SV1 SV3 Indoor unit TH4 Cylinder Hydrobox unit SV1 SV2 SV3 are closed when the power is not supplied Refrigerant LIQUID pipe co...

Page 16: ...PUMP DOWN The refrigerant collecting function is available by performing the following procedure 1 Close the 2 liquid stop valves and the cylinder hydro unit side gas valve Only the indoor unit side gas valve remains open 2 Connect the 2 liquid stop valve service ports with a hose 3 Turn on the main power and wait for 3 4 minutes 4 Press the SWP button on the outdoor controller board then the refr...

Page 17: ... of outdoor unit Actions to be taken for service which depends on whether or not the trouble is reoccurring in the field are summarized in the table below Check the contents below before investigating details Unit conditions at service Check code Actions to be taken for service summary The trouble is reoccurring Displayed Judge the problem and take a corrective action according to 10 4 SELF DIAGNO...

Page 18: ... operation modes in the order of Cool and Heat Check the auto vane with the F1 F2 buttons Press the button to return to Test run operation Press the button When the test run is completed the Test run menu screen will appear The test run will automatically stop after 2 hours Test run operation Auto vane check Press the button and open the Vane setting screen Function buttons F1 F2 F3 F4 MENU RETURN...

Page 19: ...er will appear Date and time of occurrence of the er ror will also appear on PAR 4xMAA The model name and serial number will appear only if the informa tion has been registered Press the F1 or F2 button to go to the next page When an error occurs the following screen will appear Check the error status stop the operation and consult your dealer Contact information dealer s phone number will appear ...

Page 20: ...error history Error history Check menu Error history deleted 2 Select Error history with the F1 or F2 button and press the button Select Check with the F1 or F2 button and press the button 3 Select Error history from the Check menu and press the button to view up to 16 error history records 4 records are shown per page and the top record on the first page indicates the latest error record Error hi...

Page 21: ...ion mode are displayed 3 Press the MODE button to activate COOL mode then check whether cool air blows out from the unit 4 Press the COOL button to activate HEAT mode then check whether warm air blows out from the unit 5 Press the FAN button and check whether strong air blows out from the unit 6 Press the VANE button and check whether the auto vane operates properly 7 Press the ON OFF button to st...

Page 22: ...heck code unit number attribute will appear will appear if no error history is available 4 Resetting the error history Press the F4 button Reset on the screen that shows the error history A confirmation screen will appear asking if you want to delete the error history Press the F4 button OK to delete the error history If deletion fails Request rejected will appear Unit not exist will appear if no ...

Page 23: ... controller wiring and indoor units OK No problems are found with the remote controller Check other parts for problems E3 6832 There is noise on the transmission line or the indoor unit or another remote controller is faulty Check the transmission line and the other remote controllers NG ALL0 ALL1 Send receive circuit fault The remote controller needs replac ing ERC The number of data errors is th...

Page 24: ...d refrigerant address 00 blinks Check that the remote controller s display has stopped before continuing 2 Press the TEMP buttons Select the refrigerant address of the indoor unit for the self diagnosis Note Set refrigerant address using the outdoor unit s DIP switch SW1 For more information see the outdoor unit installation manual 3 Point the remote controller at the sensor on the indoor unit and...

Page 25: ...s remote controller Wired remote controller Beeper 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 CN4F open 5 P5 Drain pump error PA Forced compressor stop du...

Page 26: ...nection of power supply terminal block TB1 2 Check following items a Connection of power supply terminal block TB1 b Connection of terminal on outdoor power circuit board 3 Check connection of the connector CNDC on the outdoor controller circuit board Refer to 10 9 TEST POINT DIAGRAM 4 Check connection of reactor DCL Check connection of TB1A TB3A TB1B and TB3B on the outdoor power circuit board Re...

Page 27: ...r of connected indoor units Abnormal if the number cannot be checked automatically due to miswiring of indoor outdoor unit connecting wire and etc after power is turned on for 4 minutes Abnormal if outdoor controller circuit board recognizes excessive number of indoor units 1 Check disconnection or looseness or polarity of indoor outdoor unit connecting wire of indoor and outdoor units 2 Check dia...

Page 28: ...ace temperature Abnormal if discharge temperature thermistor TH4 exceeds 125 C or 110 C continuously for 5 minutes Abnormal if condenser evaporator temperature thermistor TH5 exceeds 40 C during defrosting and discharge temperature thermistor TH4 exceeds 110 C Abnormal if comp surface temperature thermistor TH33 exceeds 125 C or 110 C continuously for 5 minutes 1 Overheated compressor operation ca...

Page 29: ...erature by microprocessor Thermistor TH3 TH6 TH7 TH8 Refer to 10 6 HOW TO CHECK THE PARTS SW2 on A Control Service Tool Refer to 10 10 FUNCTION OF SWITCHES CONNECTORS AND JUMPERS 3 Replace outdoor controller circuit board Note Emergency operation is available in the case of abnormalities of TH3 TH6 and TH7 Refer to 10 8 EMERGENCY OPERATION ATA only 1 Disconnection or contact failure of connectors ...

Page 30: ...and outdoor power circuit board 2 Replace outdoor power circuit board 3 Replace outdoor power circuit board 4 Replace outdoor controller circuit board 08 Abnormal power synchronous signal No input of power synchronous signal to power circuit board Power synchronous signal of 44 Hz or less or 65 Hz or more is detected on power circuit board 1 Distortion of power source voltage Noise superimposition...

Page 31: ...oard 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 10 10 FUNCTION OF SWITCHES CONNECTORS AND JUMPERS 3 Replace outdoor controller board Current sensor error or input current error Abnormal if 38A of input current is detected or 34A or more of input...

Page 32: ...er 4 Defective transmitting receiving circuit of remote controller 5 Defective transmitting receiv ing circuit of indoor controller board of refrigerant address 0 6 Noise has entered into the transmission wire of remote controller E1 or E2 Remote controller control board Abnormal if data cannot be normally read from the nonvolatile memory of the remote controller control board Check code E1 Abnorm...

Page 33: ... or outdoor unit Check all the units in the case of twin triple quadruple indoor unit system 2 4 Turn the power off and on again to check If abnormality occurs again replace indoor controller board or outdoor controller circuit board Note Other indoor controller board may have defect in the case of twin triple quadruple indoor unit system 5 Turn the power off and detach fan motor from connector Th...

Page 34: ...ed in drying mode Cooling range Indoor pipe temperature TH2 or TH5 intake temperature TH1 3_C TH Lower temperature between liquid pipe temperature and condenser evaporator temperature Heating mode When 10 seconds have passed after the compressor starts operation and the hot adjustment mode has finished the unit is detected as abnormal when condenser evaporator pipe temperature is not in heat ing r...

Page 35: ...is not displayed Refer to phenomena No 2 below if PLEASE WAIT is displayed 1Normal operation 2Self diagnosis of remote controller 3 PLEASE WAIT is displayed for 6 minutes at most in the case of indoor outdoor unit communication error Check LED3 on indoor controller board 1 When LED3 is not blinking Check indoor outdoor connecting wire for Miswiring Reverse wiring of S1 and S2 or break of S3 wiring...

Page 36: ...g pressure Clean the heat exchanger 6 Remove the blockage 7 Check refrigerant system during operation 8 For 3 minutes after temperature adjuster turns off the compressor will not start operating even if tem perature adjuster is turned on For 3 minutes after temperature adjuster turns on the compressor will not stop operating even if tem perature adjuster is turned off Compressor stops operating im...

Page 37: ...gnosis after turning on the main power Normal The startup diagnosis will be over in around 2 minutes Miswiring of indoor outdoor connecting wire Breaking of indoor outdoor connecting wire S3 Defective indoor controller board Defective outdoor controller circuit board Refer to Self diagnosis action table in order to solve the trouble In the case of communication errors the display of remote control...

Page 38: ...board are blown Check the wiring of the outdoor unit Check if the wiring is bad 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 Bad wiring of the outdoor controller board The fuses on the outdoor controller circuit board are blown Check if miswiring breaking or poor contact is causing this problem I...

Page 39: ...r circuit board Replace the outdoor controller circuit board Normal Only the unit which has the refrigerant address 0 supplies power to the remote controller Set the refrigerant address to 0 In the case of the multiple grouping system recheck the refrigerant address again Defective indoor power board Replace the indoor power board Defective outdoor power circuit board Replace the outdoor power cir...

Page 40: ...ng or poor contact of the remote controller wire Check the voltage of the terminal block TB5 connecting the remote controller wire If it is not between the indoor controller board must be defective The remote controller wire short circuits Check if the remote controller wire is short circuited Defective indoor controller board Replace the indoor controller board Diagnosis flow Cause Inspection met...

Page 41: ...ice to clear FILTER from the display See the operation manual that came with the product for how to clean the filters 3 STANDBY 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 42: ...ntrolling 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 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 horizontal blow in these cases ...

Page 43: ... released 3 The airflow direction does not change Up down vane left right louver 3 1 Check if the vane is set to a fixed 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 AVAILABLE will be displayed on the remote controller when AIR DIRECTION or LOUVER button i...

Page 44: ...ips down HEAT Water drips down from the heat exchanger Note Make use of optional parts Drain Socket and Drain pan if these water needs to be collected and drained out for once Water or moisture is expelled from the outdoor unit Batteries are being exhausted 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...

Page 45: ... terminals with a tester At the ambient temperature 20 C Measure the resistance between the terminals with a tester At the ambient temperature 20 C Solenoid valve coil 4 way valve 21S4 Solenoid valve coil SV1 SV2 Motor for compressor MC Linear expansion valve LEV A LEV B LEV C Normal Abnormal Open or short Abnormal Open or short Refer to 5 2 COMPRESSOR TECHNICAL DATA Open or short Refer to next pa...

Page 46: ... connector CNF1 1 Turn off the breaker and turn on the SW6 3 2 Disconnect the connector CNF1 3 Turn on the breaker to start test run 4 Measure the voltage in the outdoor controller circuit board TEST POINT 1 VDC between 1 and 4 of the fan connector VDC 250 380 V DC TEST POINT 2 VCC between 5 and 4 of the fan connector VCC 15 V DC TEST POINT 3 VSP between 6 and 4 of the fan connector VSP 6 5 V DC 5...

Page 47: ...7 kΩ 2 B constant 4150 3 Rt 17exp 4150 273 t 323 1 1 Thermistor R120 7 465 kΩ 2 B constant 4057 2 Rt 7 465exp 4057 273 t 393 1 1 Medium temperature thermistor Thermistor Heat sink TH8 20 C 250 kΩ 30 C 160 kΩ 40 C 104 kΩ 50 C 70 kΩ 60 C 48 kΩ 70 C 34 kΩ 80 C 24 kΩ 90 C 17 5 kΩ 100 C 13 0 kΩ 110 C 9 8 kΩ High temperature thermistor Thermistor Discharge TH4 Thermistor Comp surface TH33 0 10 20 30 40 ...

Page 48: ...e 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 Gray Orange Red Yellow Black 2 3 4 5 Connector LEV A 12 V DC Outdoor controller board...

Page 49: ...ess Be sure to attach the stopper to pipe B B 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 pipe B At this time be careful that stress is not added to lead wire and main body is not wound by lead wire If the stop per is not ...

Page 50: ...set the indoor unit 3 During emergency operation the air conditioner will continuously be operated by supplying power and stopping it It cannot be turned on or off by remote control and temperature control is not possible 4 Do not perform emergency heating operation for an extended period of time If the outdoor unit starts defrosting during this period cold air will blow out from the indoor unit 5...

Page 51: ...e pipe temperature TH6 Outdoor ambient temperature TH7 Pressure sensor saturated temperature 63HS Temperature difference code room temperature set temperature Tj Operation mode COOL 27 C 5 C 5 C 25 C 45 C 50 C 35 C 50 C 5 HEAT 20 5 C 45 C 50 C 22 C 5 C 5 C 7 C 50 C 5 1 1 1 1 Remarks 1 If the thermistor temperature data is normal not open short that data is loaded into the control as valid data Whe...

Page 52: ...50 380 V DC 5 4 15 V DC 6 4 0 6 5 V DC 7 4 15 V DC When stopped 7 5 V DC When operated 0 15 V pulse CNDC 250 380 V DC 1 3 Outdoor power circuit board CNS S1 S2 230 V AC CNAC 2 to 4 Power supply for outdoor controller circuit board 230 V AC 1 to 3 Power supply for indoor and outdoor unit connection wire 230 V AC 21S4 4 way valve CN4 Transmission to out door power circuit board CN4 CN51 External sig...

Page 53: ...ow in the diagram are not actually printed on the board CN6 Thermistor CN4 Connect to the outdoor controller circuit board CN4 NI LI Voltage of 230 V AC is input Connected to the terminal block TB1 EI E2 E3 E4 Connected to the earth CNDC 280 380 V DC 1 3 connect to the outdoor controller circuit board CNDC TB1A TB3A TB1B TB3B Connected to DCL CNAC1 CNAC2 230 V AC Connected to the outdoor controlle...

Page 54: ...there is no problem if DIP SW1 1 is left ON or changed to OFF again This depends on the service conditions The black square indicates a switch position Type of switch Switch No Function Action by the switch operation Effective timing ON OFF Dip switch SW1 1 Manual defrost 1 Start Normal When compressor is working in ATA heating and ATW heating operation 1 2 Abnormal history clear Clear Normal OFF ...

Page 55: ...ch SW5 1 No function 2 Power failure automatic recovery 2 Auto recovery No auto recovery When power supply ON 3 4 No function 5 Forced refrigerant recovery Start Normal When compressor is working in ATA cooling ATA heating and ATW heating SW7 1 Mode select 3 Demand function Low noise mode Always 2 No function 3 No function 5 Operation priority ATW ATA When power supply ON 6 Defrost setting For hig...

Page 56: ...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 Orange 1 3 Brown Red 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 performing the followi...

Page 57: ... Indoor outdoor unit communication error transmitting error is detected by indoor unit E7 P 33 Indoor outdoor unit communication error signal receiving error is detected by outdoor unit P 33 E8 Indoor outdoor unit communication error transmitting error is detected by outdoor unit P 33 E9 3 blinking Remote controller signal receiving error is detected by remote controller E0 1Check if connecting wi...

Page 58: ...ve a short cycle on their air ducts 2Measure resistance value of outdoor thermistor TH8 P 29 7 blinking Abnormality of voltage U9 1Check looseness disconnection and reverse connection of compressor wiring 2Measure resistance value among terminals on compressor using a tester 3Check if power supply voltage decreases P 30 4 blinking 1 blinking Abnormality of room temperature thermistor TH1 P1 1Check...

Page 59: ...unit Miswiring of indoor outdoor unit connecting wire excessive number of indoor units 4 units or more Miswiring of indoor outdoor unit connecting wire reverse wiring or disconnection Startup time over Reverse connection of ATA ATW communication wire Communication error except for outdoor unit Display Inspection unit 0 A1 A2 b1 Outdoor unit ATA indoor unit 1 ATA indoor unit 2 Cylinder unit or Hydr...

Page 60: ...ischarge thermistor detects 100 C or more hundreds digit tens digit and ones digit are displayed by turns Example When 105 C 0 5 s 0 5 s 2 s 1 05 C 1 ON 2 3 4 5 6 Outdoor 2 phase pipe temperature TH6 40 90 When the coil thermistor detects 0 C or below and temperature are displayed by turns Example When 10 C 0 5 s 0 5 s 2 s 10 C 1 ON 2 3 4 5 6 Outdoor temperature TH7 39 88 39 88 When the temperatur...

Page 61: ...00 C or more hundreds digit tens digit and ones digit are displayed by turns C 1 ON 2 3 4 5 6 Compressor operating frequency 0 255 0 255 When it is 100Hz or more hundreds digit tens digit and ones digit are displayed by turns Example When 125Hz 0 5 s 0 5 s 2 s 1 25 Hz 1 ON 2 3 4 5 6 LEV A opening pulse 0 480 0 480 When it is 100 pulse or more hundreds digit tens digit and ones digit are displayed ...

Page 62: ...Code 1 ON 2 3 4 5 6 ATA tj 0 99 Code 1 ON 2 3 4 5 6 Indoor setting temperature 10 30 10 30 1 ON 2 3 4 5 6 The number of connected indoor units 0 2 The number of connected indoor units are displayed Unit 1 ON 2 3 4 5 6 Capacity setting display Displayed as an outdoor capacity code Code display 1 ON 2 3 4 5 6 Outdoor unit setting information Example When heat pump 3 phase and defrosting nor mal are ...

Page 63: ... 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 heatsink Example The following controls are activated Primary current control Preventive control for excessive tempe rature...

Page 64: ... unit Postponement code display Blinking During postponement Lighting Cancellation of postponement 00 is displayed in the case of no postponement Code display 1 ON 2 3 4 5 6 Error postponement code history 2 of outdoor unit Postponement code display Blinking During postponement Lighting Cancellation of postponement 00 is displayed in the case of no postponement Code display 1 ON 2 3 4 5 6 Error po...

Page 65: ...nd Eva TH5 on error occurring 39 88 39 88 When the temperature is 0 C or less and temperature are displayed by turns Example When 15 C 0 5 s 0 5 s 2 s 15 C 1 ON 2 3 4 5 6 Pipe temperature Outdoor pipe TH3 on error occurring 40 90 40 90 When the coil thermistor detects 0 C or below and temperature are displayed by turns Example When 15 C 0 5 s 0 5 s 2 s 15 C 1 ON 2 3 4 5 6 An error has occurred on ...

Page 66: ...ones digit are displayed by turns Example When 150 C 0 5 s 0 5 s 2 s 50 1 C 1 ON 2 3 4 5 6 Sub cool on error occurring SC 0 130 Cooling 63HS TH3 Heating 63HS TH2 DHW Cooling DHW 63HS TH34 Heating DHW 63HS TH2 or 63HS TH34 whichever is lower 0 130 When the temperature is 100 C or more hundreds digit tens digit and ones digit are displayed by turns Example When 115 C 0 5 s 0 5 s 2 s 15 1 C 1 ON 2 3 ...

Page 67: ...error Overvoltage error Undervoltage error Input current sensor error L1 phase open error Abnormal power synchronous signal PFC error Overvoltage Undervoltage Overcurrent Display examples for multiple errors Overvoltage 01 Undervoltage 02 03 Undervoltage 02 Power sync signal error 08 0A L1 phase open error 04 PFC error 10 14 Description Display 00 01 02 04 08 10 Code display 1 ON 2 3 4 5 6 Thermo ...

Page 68: ...02 indoor temperature detecting No Indoor temperature ta No 1 Average data of the sensor on all the indoor units Initial setting Initial setting Initial setting ta A B 2 ta A B 2 ta A ta A No 2 The data of the sensor on the indoor unit that connected with remote controller ta A ta B ta A ta A No 3 The data of the sensor on main remote controller ta C ta C ta C ta C OUTDOOR INDOOR REMOTE MAIN REMOT...

Page 69: ...password is required 3 If the password matches the Service menu will appear The type of menu that appears depends on the connected indoor units type A screen will appear that indicates the setting has been saved Navigating through the screens To go back to the Service menu button To return to the previous screen button Service menu Note The initial maintenance password is 9999 Change the default p...

Page 70: ... start fan op eration If the unit is common or when running all units all indoor units for the selected refrigerant address will start fan operation Function setting Ref address Sending data 5 When the settings are completed press the button to send the setting data from the remote controller to the indoor units When the transmission is successfully completed the screen will return to the Function...

Page 71: ...irect the wireless remote controller toward the receiver of the indoor unit and press the button 3 Set the unit number Press the temp button to set the unit number Press 01 to specify the indoor unit whose unit number is 01 Direct the wireless remote controller toward the receiver of the indoor unit and press the button Notes 1 If a unit number that cannot be recognized by the unit is entered 3 be...

Page 72: ...th the F1 or F2 button and press the button Select Check with the F1 or F2 button and press the button 2 Set the Refrigerant address and Request code Select the item to be changed with the F1 or F2 button Select the required setting with the F3 or F4 button Ref address setting 0 15 Request code setting Press the button Data will be collected and displayed F1 F2 F3 F4 Request code Request Request R...

Page 73: ...es 23 LEV B opening 0 500 Pulses 24 LEV C opening 0 500 Pulses 25 Primary current 0 50 A 26 DC bus voltage 180 380 V 27 28 29 Number of connected indoor units 0 4 Units 30 Indoor unit Setting temperature 17 30 C 31 Indoor unit Intake air temperature Measured by thermostat 8 39 C 32 Indoor unit Intake air temperature Unit No 1 Heat mode 4 degree correction 8 39 C 0 is displayed if the target unit i...

Page 74: ...l Contents in Request Code 75 76 Outdoor unit SW4 setting information Refer to 12 2 1 Detail Contents in Request Code 77 Outdoor unit SW5 setting information Refer to 12 2 1 Detail Contents in Request Code 78 Outdoor unit SW6 setting information Refer to 12 2 1 Detail Contents in Request Code 79 Outdoor unit SW7 setting information Refer to 12 2 1 Detail Contents in Request Code 80 Outdoor unit SW...

Page 75: ...0 255 C 119 Sub cool SC at time of error 0 130 C 120 Compressor Operating frequency at time of error 0 255 Hz 121 Outdoor unit at time of error Fan output step 0 10 Step 122 Outdoor unit at time of error Fan 1 speed Only for air conditioners with DC fan 0 9999 rpm 123 Outdoor unit at time of error Fan 2 speed Only for air conditioners with DC fan 0 9999 rpm 0 is displayed if the air conditioner is...

Page 76: ...ndoor unit SW3 information Undefined 165 Wireless pair No indoor control board side setting Refer to 12 2 1 Detail Contents in Request Code 166 Indoor unit SW5 information Undefined 167 189 190 Indoor unit Microprocessor version information Examples Ver 5 01 0501 Ver 191 Indoor unit Microprocessor version information sub No Auxiliary information displayed after version information Examples Ver 5 0...

Page 77: ...de 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 Unit No 4 state Unit No 3 state Unit No 2 state Unit No 1 state Display State 0 Normal 1 Preparing for heat operation 2 3 4 Heater is ON 5 Anti freeze protection is ON 6 Overheat protection is ON 7 RequestingcompressortoturnOFF F There are no correspondi...

Page 78: ...0 1 2 3 4 5 6 7 8 9 A b C d E F 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 SV3 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 erro...

Page 79: ...uest code 70 Data display Capacity 10 50 9 35 11 60 14 71 20 100 25 125 28 140 40 200 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 ...

Page 80: ...0 1 1 1 1 0 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 Outdoor unit switch setting display SW1 to SW10 except SW3 Request codes 73 to 82 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 0 1 1 ...

Page 81: ... 16 11 125 02 22 12 140 03 25 13 160 04 28 14 200 05 32 15 224 06 35 36 16 250 07 40 17 280 08 45 18 09 50 19 0A 56 1A 0b 63 1b 0C 71 1C 0d 80 1d 0E 90 1E 0F 100 1F Display Pair No setting state 00 No 0 01 No 1 J41 disconnected 02 No 2 J42 disconnected 03 No 3 J41 J42disconnected Wireless pair No indoor control board side setting Request code 165 Data display 0 0 See the table on the right ...

Page 82: ... Select Service from the Main menu and press the button 2 Set each item Select the item to be changed with the F1 or F2 button Select the required setting with the F3 or F4 button Ref address setting 0 15 Stable mode setting Cool Heat Normal Press the button Fixed operation will start Note Stable mode will take approx 20 minutes F1 F2 F3 F4 Smooth maintenance Return Smooth maintenance Return Smoot...

Page 83: ...eat exchanger temperature 7 Indoor intake air temperature Cool Classification Item Result Inspection Temperature difference Heat Inspection Temperature difference Stable Unstable Stable Unstable Fixed 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 lower B In heat mode o...

Page 84: ...d LEV C on the controller circuit board Symbols on the board CNF1 Fan motor LEV A LEV B LEV C LEV SV1 SV2 SV3 Bypass valve coil 5 Disconnect the pipe side connections of the following parts Thermistor Liquid TH3 Thermistor Discharge TH4 Thermistor 2 phase pipe TH6 Thermistor Ambient TH7 Thermistor Comp surface TH33 High pressure switch 63H High pressure sensor 63HS 4 way valve coil 21S4 6 Disconne...

Page 85: ... for the lead wire in the rear of the elec trical parts box See Photo 5 6 Pull out the thermistor Ambient TH7 from the sensor holder Note When replacing thermistor Ambient TH7 replace it together with thermistor 2 phase pipe TH6 since they are combined together Refer to procedure No 4 above to remove ther mistor 2 phase pipe Photo 6 6 Removing the thermistor Discharge TH4 and thermis tor Comp surf...

Page 86: ...ng the LEV 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 the valve bed See Photo 12 5 Remove the side panel R 6 Remove the LEV coil 7 Recover refrigerant 8 Remove the welded part of LEV Note 1 Recover refrigerant without spreading it in the air Note 2 The welded part can be removed easily by removing the side panel ...

Page 87: ...lectrical parts box See Photo 4 4 Remove the side panel R fixing screws 3 for rear 5 12 in the rear of the unit and remove the side panel R 5 Pull out the lead wire of high pressure sensor 6 Recover refrigerant 7 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 removing the side panel R Note 3 ...

Page 88: ...table wrench 11 Remove the welded pipe of compressor inlet and outlet then remove the compressor Note Recover refrigerant without spreading it in the air Photo 12 Photo 13 15 Removing the accumulator 1 Remove the service panel See Photo 1 2 Remove the top panel See Photo 1 3 Remove the cover panel front See Photo 13 4 Remove the cover panel rear See Photo 13 5 Remove the electrical parts box See P...

Page 89: ...89 OCH665B ...

Page 90: ...KU TOKYO 100 8310 JAPAN CCopyright 2017 MITSUBISHI ELECTRIC CORPORATION Issued Oct 2019 No OCH665 REVISED EDITION B Issued Apr 2019 No OCH665 REVISED EDITION A Published May 2017 No OCH665 Made in Japan Specifications are subject to change without notice ...

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Mitsubishi Electric PUHZ-FRP71VHA2R1, Service Manual

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