Mitsubishi Electric Mr.Slim PUHZ-FRP71VHA Service Manual Download Page 99

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PUHZ-FRP71VHA

Photo 1

Top panel fixing screws

Top panel

Service panel

fixing screws

Service panel

Grille fixing screws

Fan grille

Slide

Photo 4

Electrical parts box

Controller circuit

board (C.B.)

Electrical parts

box fixing screw

Terminal block

(TB1)

Fan motor fixing screws

Fan

motor

(MF1)

Fan motor

fixing screws

Photo 3

Photo 2

Propeller

Front panel

Front panel fixing screws

Nut

1. Removing the service panel and top panel

(1) Remove the service panel fixing screws (3 for front, 5 × 12)

and slide the hook on the right downward to remove the

service panel.

(2) Remove the top panel fixing screws (3 for front, 3 for rear,

5 × 12) to detach the top panel.

2. Removing the fan motor (MF1)

(1) Remove the service panel. (See Photo 1)

(2) Remove the top panel. (See Photo 1)

(3) Remove the fan grille fixing screws (5 for front, 5 × 12) to

detach the fan grille. (See Photo 1)

(4) Remove a nut (for right handed screw of M6) to detach the

propeller. (See Photo 2)

(5) Disconnect the connector CNF1 on controller circuit board

in electrical parts box.

(6) Disconnect the lead wire from 2 clamps on the separator

and electrical parts box (on the ceiling, front side).

(7) Remove the fan motor fixing screws (4 for front, 5 × 25) to

detach the fan motor. (See Photo 3)

3. Removing the electrical parts box

(1) Remove the service panel. (See Photo 1)

(2) Remove the top panel. (See Photo 1)

(3) Disconnect the indoor/outdoor connecting wire and power

supply wire from the terminal block.

(4) Disconnect the connector CNF1, LEV-A and LEV-B on the

controller circuit board.

• CNF1: Fan motor

• LEV-A, LEV-B: LEV

(5) Disconnect the pipe-side connections of the following parts.

• Thermistor <Outdoor pipe> (TH3)

• Thermistor <Discharge> (TH4)

• Thermistor <Outdoor 2-phase pipe> (TH6)

• Thermistor <Outdoor> (TH7)

• Thermistor <Comp. surface> (TH34)

• Thermistor <Heatsink> (CN3)

• High pressure switch (63H)

• High pressure sensor (63HS)

• Bypass valve coil (SV2)

• 4-way valve coil (21S4)

(6) Disconnect the lead wires from 2 clamps on the separator.

(7) Remove the terminal cover and disconnect the compressor

lead wire.

(8) Remove the electrical parts box fixing screw (1 for front,

4 × 10) and detach 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.

DISASSEMBLY PROCEDURE

OPERATING PROCEDURE

PHOTOS & ILLUSTRATION

Side panel (R)

Cover panel

(Rear)

Cover panel (Front)

OCH544

Summary of Contents for Mr.Slim PUHZ-FRP71VHA

Page 1: ...EATURES 7 4 SPECIFICATIONS 8 5 DATA 9 6 OUTLINES AND DIMENSIONS 11 7 WIRING DIAGRAM 12 8 WIRING SPECIFICATIONS 13 9 REFRIGERANT SYSTEM DIAGRAM 15 10 TROUBLESHOOTING 17 11 FUNCTION SETTING 71 12 MONITORING THE OPERATION DATA BY THE REMOTE CONTROLLER 84 13 EASY MAINTENANCE FUNCTION 95 14 DISASSEMBLY PROCEDURE 99 Note This manual describes only service data of the outdoor units RoHS compliant product...

Page 2: ...EHPT20X YM9B UK OCH531 EHSC VM2B EHSC VM6B EHSC YM9B EHSC TM9B EHSC VM6EB EHSC YM9EB EHPX VM2B EHPX VM6B EHPX YM9B ERSC VM2B EHSC VM2B UK EHSC VM6B UK EHSC YM9B UK EHSC TM9B UK EHSC VM6EB UK EHSC YM9EB UK EHPX VM2B UK EHPX VM6B UK EHPX YM9B UK ERSC VM2B UK OCH532 Model name Service Ref Service Manual No PLA ZRP35 50 60 71 125 140BA PLA ZRP35 50 60 71 125 140BA UK OCH535 OCB535 PCA RP35 50 60 71 10...

Page 3: ...efrigerant 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 deterioration...

Page 4: ...med with the cylinder of syphon stood vertically Refrigerant is charged 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 3MPa G or over 2 Charge hose Only for R410A Use pressure performan...

Page 5: ...isting pipe thickness and check for damage The existing pipe thickness meets specif ca 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 If the...

Page 6: ... 0 29 0 17 0 22 0 24 0 27 0 36 0 Nominal dimensions inch Flare nut dimensions Outside diameter Dimension B mm R410A R22 Gauge manifold Charge hose Gas leak detector Refrigerant recovery equipment Refrigerant cylinder Applied oil Safety charger Charge valve Vacuum pump Flare tool Bender Pipe cutter Welder and nitrogen gas cylinder Refrigerant charging scale Vacuum gauge or thermis tor vacuum gauge ...

Page 7: ...pansion Valve always control the optimal refrigerant level regardless of the length Total 30 m max and 5 m min 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 OCH544 ...

Page 8: ... the indoor outdoor unit ATA Cooling HR Cooling ATA Heating ATW Heating W D H Liquid Gas Liquid Gas ATA ATW ATA indoor side ATW indoor side Outdoor side Height difference Piping length Service Ref PUHZ FRP71VHA SNB172FSHM1 Propeller fan 1 0 086 55 1 940 47 48 943 37 1 8 73 161 3 8 8 4 0 70 FV50S Max 60 m total Max 30 m for each Munsell 3Y 7 8 1 1 Linear Expansion Valve Hermetic Inverter Plate fin ...

Page 9: ...10m 20m 30m 40m 50m 60m 75m PUHZ FRP71VHA 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 CENTER FREQUENCIES Hz PUHZ FRP71...

Page 10: ...rrent A 0 17 0 15 0 17 Outdoor unit PUHZ FRP71VHA Phase Hz 1 50 1 50 1 50 1 50 Voltage V 230 230 230 230 Current A 9 15 9 12 8 70 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 side Intake...

Page 11: ...LARE 9 52 3 8F㧕 Connect to indoor unit Refrigerant GAS pipe connection FLARE 15 88 5 8F Connect to cylinder unit or hydrobox Refrigerant LIQUID pipe connection FLARE 9 52 3 8F㧕 Connect to cylinder unit or hydrobox Example of Notes This tap mark indicates the cylinder hydro unit connection side for the following parts ޓ Terminal bed for the connecting cables S1 S2 S3 ޓ Stop valves gas and liquid fo...

Page 12: ...LEV C ACL Terminal Block Power Supply Indoor Outdoor TB2 Terminal Block Cylinder HydroboxUNIT Outdoor Motor for Compressor Fan Motor Solenoid Valve Four Way Valve SV1 3 Solenoid Valve High Pressure Switch 63HS High Pressure Sensor Thermistor Discharge Thermistor Outdoor 2 Phase Pipe Thermistor Outdoor TH3 Thermistor Outdoor Pipe Thermistor Heat Sink TH34 Thermistor Comp Surface Linear Expansion Va...

Page 13: ...oor 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 unit earth 2 1 Min 1 5 Remote controller Indoor unit Cylinder or Hydrobox side remote controller its unit 3 2 ...

Page 14: ...r 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 power supplies change the connections of the connectors as shown in the following figure Connectors Indoor unit control board Separate indoor unit outdoor unit power supplies ...

Page 15: ...ating 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 TH34 SV2 SV1 SV3 Indoor unit TH4 Cylinder Hydrobox unit SV1 SV2 SV3 are closed when the power is not supplied Refrigerant LIQUID pipe connection 3...

Page 16: ... 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 gas 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 refrigerant coll...

Page 17: ...ice There is no abnormality in electrical component controller board remote controller and etc Re check the abnormal symptom Conduct trouble shooting and ascertain the cause of the trouble according to 10 5 Troubleshooting of problems Continue to operate unit for the time being if the cause is not ascertained There is no abnormality concerning of parts such as electrical component controller board...

Page 18: ...1 F2 F3 F4 Remain Vane Cool mode Check the cold air blow off Heat mode Check the heat blow off Press the F1 button to go through the operation modes in the order of Cool and Heat Check the auto vane with the F1 F2 buttons Check the operation of the outdoor unit s fan Press the button to return to Test run operation Press the button When the test run is completed the Test run menu screen will appea...

Page 19: ... the following screen will appear Check the error status stop the operation and consult your dealer Contact information dealer s phone number will appear if the information have been registered F1 F2 F3 F4 F1 F2 F3 F4 Error information Error reset Error reset Error code Error unit IU Ref address Unt Model name Serial No Reset Page Reset current error Error reset OK Cancel Main menu Reset error Res...

Page 20: ... mm yy Error history Cancel OK Delete 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 Four records are shown per page and the top record on the f rst page i...

Page 21: ...d green once and red twice blink alternately F3 F5 F9 After startup is displayed green twice and red once blink alternately EA Eb After startup is displayed only green lights up 00 After startup is displayed only green lights up 00 indicates digital display 2 Press TEST button twice 1 Turn on the main power supply 3 Press OPERATION SWITCH button 4 Press AIR DIRECTION button 5 Check the outdoor uni...

Page 22: ...ayed 3 Press the MODE button to activate COOL mode then check whether cool air is blown out from the unit 4 Press the COOL button to activate HEAT mode then check whether warm air is blown out from the unit 5 Press the FAN button and check whether strong air is blown out from the unit 6 Press the VANE button and check whether the auto vane operates properly 7 Press the ON OFF button to stop the te...

Page 23: ...from the Main menu and press the button 3 Error 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 conf rmation 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 wi...

Page 24: ... remote controller display if the correct voltage 8 5 12 VDC is not supplied to the remote con troller If this is the case check the remote 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 ...

Page 25: ... latest check code can be recalled even if it is cancelled by the remote controller or power is turned off Check the error code history for each unit using the remote controller Switch to self diagnosis mode Press the CHECK button twice within 3 seconds The display content will change as shown below Set the unit number or refrigerant address you want to diagnose Press the TEMP buttons and to selec...

Page 26: ... content will change as shown below Press the FILTER button to start self diagnosis 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 rem...

Page 27: ...e is cancelled Procedure 1 Press the CHECK button twice 2 Press the temperature buttons 3 Point the remote controller at the sensor on the indoor unit and press the HOUR button 4 Point the remote controller at the sensor on the indoor unit and press the ON OFF button Malfunction diagnosis method at maintenance service 10 3 6 Self diagnosis wireless remote controller In case of trouble during opera...

Page 28: ...ber of times Wireless remote controller Wired remote controller Beeper sounds OPERATION INDICATOR lamp flashes 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 Forc...

Page 29: ...ck 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 Check connection of the connector LD1 and LD2 on the outdoor power circuit board Refer to 10 9 4 Check connection of reactor ACL Check connection of LO and NO on the outdoor noise filter circuit b...

Page 30: ...f 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 2 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 diam...

Page 31: ...perature High comp surface temperature 1 Abnormal if discharge temperature thermistor TH4 exceeds 125 or 110 continuously for 5 minutes Abnormal if condenser evaporator temperature thermistor TH5 exceeds 40 during defrosting and discharge temperature thermistor TH4 exceeds 110 2 Abnormal if comp surface temperature thermistor TH34 exceeds 125 C or 110 continuously for 5 minutes 1 Overheated compre...

Page 32: ...rature by microcomputer Thermistor TH3 TH6 TH7 TH8 Refer to 10 6 SW2 on A Control Service Tool Refer to 10 10 3 Replace outdoor controller circuit board Emergency operation is available in case of abnormalities of TH3 TH6 and TH7 Refer to 10 8 1 Disconnection or contact failure of connectors Outdoor controller circuit board TH3 TH6 TH7 Outdoor power circuit board CN3 2 Defective thermistor 3 Defec...

Page 33: ...3 Replace outdoor noise f lter circuit board 4 Replace outdoor power circuit board 5 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 2 Disconnection or loose...

Page 34: ...heck 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 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 current is detected for 10 seconds continuously 1 D...

Page 35: ...ective 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 1 Abnormal if data cannot be normally read from the nonvolatile memory of the remote controller control board Error code E1 2 Abnormal i...

Page 36: ...e units in case of twin triple quadruple indoor unit system 2 4 Turn the power off and on again to check If abnormality generates again replace indoor controller board or outdoor controller circuit board Other indoor controller board may have defect in case of twin triple quadruple indoor unit system 5 Turn the power off and detach fan motor from connector CNF1 2 Then turn the power on again If ab...

Page 37: ...ying mode Cooling range Indoor pipe temperature TH2 or TH5 intake temperature TH1 3 deg 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 range w...

Page 38: ...ler if PLEASE WAIT 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 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 Converse wiring of S1 and S2 or br...

Page 39: ...e Clean the heat exchanger 6 Remove the blockage 7 Check refrigerant system during operation 8 1 For 3 minutes after temperature adjuster turns off the compres sor will not start operating even if temperature adjuster is turned on 2 For 3 minutes after temperature adjuster turns on the compres sor will not stop operating even if temperature adjuster is turned off Compressor stops operating immedia...

Page 40: ... after turning on the main power Normal The start up 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 case of communication errors the display of remote controller may n...

Page 41: ... 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 ...

Page 42: ...tdoor controller 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 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 outdoo...

Page 43: ...tact of the remote controller wire Check the voltage of the terminal block TB5 connecting the remote controller wire If it is not between DC 10V and DC16V 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 ...

Page 44: ...ear FILTER from the display See the operation manual that came with the product for how to clean the filters STANDBY is displayed on the screen 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 minutes later W...

Page 45: ...or unit is controlling the airflow amount in order to keep the optimum operating condition A sound similar to water flowing is heard from the unit This is not a malfunction This is the sound which is heard when the refrigerant is flowing inside the indoor unit The fan speed does not match the setting of the remote controller in HEAT operation The up down vane will be automatically set to horizonta...

Page 46: ... airflow direction does not change Up down vane left right louver 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 doesn t have that function NOT AVAILABLE will be displayed on the remote controller when AIR DIRECTION or LOUVER button is pressed Somethin...

Page 47: ...ps down Heating water drips down from the heat exchanger 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 un...

Page 48: ...een the terminals with a tester At the ambient temperature 20 Measure the resistance between the terminals with a tester At the ambient temperature 20 Solenoid valve coil Four 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 Open or short Refer to next page Fan motor MF1 235...

Page 49: ...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 50: ... 17k 2 B constant 4150 3 Rt 17exp 4150 273 t 323 1 1 Thermistor R120 7 465k 2 B constant 4057 2 Rt 7 465exp 4057 273 t 393 1 1 Medium temperature thermistor Thermistor Heatsink TH8 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 TH4 Thermistor Comp surface TH34 0 10 20 30 40 50 20 10 0 10 20 30 40 50 Temperature Resis...

Page 51: ...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 DC12V Outdoor controller board Drive circuit 3...

Page 52: ...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 firmly ...

Page 53: ...oor unit 3 During emergency operation the air conditioner will continuously be operated by supplying power and stopping it It can not 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 Do not pe...

Page 54: ...r 2 phase pipe temperature TH6 Outdoor ambient temperature TH7 Pressure sensor saturated temperature 63HS Temperature difference code room temperature set temperature Tj Operation mode COOL 27 5 5 25 45 50 35 50 5 HEAT 20 5 45 50 22 5 5 7 50 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 When the unit enters emerge...

Page 55: ...DC 7 4 15V DC When stopped 7 5V DC When operated 0V 15V pulse CNDC 250 370V DC 1 3 Outdoor power circuit board CNS S1 S2 230V AC CNAC 2 to 4 Power supply for outdoor controller circuit board 230V AC 1 to 3 Power supply for indoor and outdoor unit connection wire 230V AC 21S4 Four way valve CN4 Transmission to out door power circuit board CN4 CN51 External signal output Compressor operating signal ...

Page 56: ... Connect ACL CN52C 52C relay signal Connect to the outdoor controller circuit board CN52C CN5 Primary current Connect to the outdoor power circuit board CN5 CNAC1 CNAC2 220 240V AC Connect to the outdoor control ler circuit board CNAC EI E2 Connect to the earth E3 Connect to the earth OCH544 ...

Page 57: ... the board CN2 Connect to the outdoor controller circuit board CN2 1 5 Outdoor power circuit board Transmitting signal to the outdoor controller circuit board 0 5V DC 2 5 Zero cross signal 0 5V DC 3 4 Not used 6 5 16V DC 7 5 16V DC 1 2 6 7 5 LD1 LD2 280 380V DC Connect to the outdoor controller circuit board CNDC R S Connect to the ACL 220 240V AC U V W Connect to the compressor MC Voltage among p...

Page 58: ...ON 1 2 3 4 5 6 ON 1 2 3 4 5 6 ON 1 2 3 4 5 6 ON 10 10 FUNCTION OF SWITCHES CONNECTORS AND JUMPERS 1 Function of switches 1 Forced defrost should be done as follows 1 Change the DIP SW1 1 on the outdoor controller board from OFF to ON 2 Forced defrost will start by the above operation 1 if all these conditions written below are satisfied Heat mode setting 10 minutes have passed since compressor sta...

Page 59: ...y 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 6 Model select MODEL 71 SW5 6 1 2 3 4 5 6 OFF ON SW7 1 Mode select 3 Demand function Low noise mode Always 2 No function 3 No function 4 Model select MODEL 71 SW7 4 1 2 3 4 5 6 OFF ON 5 Operation priority ATW ATA Wh...

Page 60: ...ow noise mode B On site arrangement C External input adapter PAC SC36NA E X Relay D Outdoor unit control board E Max 10 m F Power supply for relay A SW1 Orange 1 3 Brown Red 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 Max 10 m F Power supply for relay By performing the following modif ca...

Page 61: ... Serial communication error Communication between outdoor controller board and outdoor power board Communication between outdoor controller board and M NET P C board 1 Error code displayed on remote controller Check if indoor outdoor connecting wire is connected correctly Check if 4 or more indoor units are connected to outdoor unit Check if noise entered into indoor outdoor connecting wire or pow...

Page 62: ...are not disconnected Measure resistance value of outdoor thermistors Abnormality of heatsink temperature Check if indoor outdoor units have a short cycle on their air ducts Measure resistance value of outdoor thermistor TH8 Check the outdoor fan motor Check if connector TH3 on outdoor controller board is disconnected Abnormality of voltage Check looseness disconnection and converse connection of c...

Page 63: ...oor unit connecting wire excessive number of indoor units 4 units or more Miswiring of indoor outdoor unit connecting wire converse 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 Hydrobox Display Contents to be ...

Page 64: ...s digit 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 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 s...

Page 65: ...umber 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 50 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 Thermostat ON time 0 999 Test run elapsed time 0 120 0 999 When it is 100 minutes or...

Page 66: ...ling 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 defrosting normal are set up 20 is displayed 1 ON 2 3 4 5 6 1 ON 2 3 4 5 6 Indoor pipe temperature Cond Eva TH5 1 Indoor 1 39 88 39 88 When the temperature is 0 or less and temperature are displayed by turns 39 88 When the temperature is 0 or less and...

Page 67: ...y turns When the thermistor detects 100 or more hundreds digit tens digit and ones digit are displayed by turns Outdoor temperature TH7 39 88 39 88 When the temperature is 0 or less and temperature are displayed by turns No error Overvoltage error Undervoltage error Input current sensor error L1 phase open error Abnormal power synchronous signal PFC error Overvoltage Undervoltage Overcurrent PFC I...

Page 68: ...ayed in case of no postponement Code display Error code history 3 Oldest Alternate display of abnormal unit number and code When no error history 0 and are displayed by turns 3 Outdoor pipe temperature TH3 6 Outdoor 2 phase temperature TH6 7 Outdoor temperature TH7 8 Outdoor heatsink TH8 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 the...

Page 69: ... Example When 15 C 0 5 secs 0 5secs 2 secs Outdoor temperature TH7 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 secs 0 5secs 2 secs Outdoor heatsink temperature TH8 on error occurring 40 200 40 200 When the temperature is 0 C or less and temperature are displayed by turns When the temperature is 100 C or more hundre...

Page 70: ... a help to know the operating status of unit Display Compressor operating frequency control Display Compressor operating frequency control Primary current control Secondary current control 1 2 1 4 8 2 The tens digit The ones digit In this digit the total number of activated control is displayed Preventive control for excessive temp erature rise of discharge temperature Preventive control for exces...

Page 71: ...ng mode02 indoor temperature detecting No Indoor temperature ta No 1 Average data of the sensor on all the indoor units 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 REMOTE SUB INDOOR OUTDOOR INDO...

Page 72: ...Operating Procedure When setting functions for a simultaneous Twin Triple indoor unit system set the unit number to 01 to 03 for each indoor unit in case of selecting different functions for each unit referring to 4 setting the indoor unit number of Operating Procedure When setting the same functions for an entire simultaneous Twin Triple indoor unit system set refrigerant address to AL 07 in case...

Page 73: ...ervice to make the maintenance setting Maintenance password is required Note The initial maintenance password is 9999 Change the default password as necessary to prevent unauthorized access Have the password available for those who need it If you forget your maintenance password you can initialize the password to the default password 9999 by pressing and holding the F1 and F2 buttons simultaneousl...

Page 74: ...he setting number with the F3 or F4 button 1 Select Service from the Main menu and press the button Checking the indoor unit No When the button is pressed the target indoor unit will start fan operation If the unit is common or when running all units all indoor units for the selected refrigerant address will start fan operation F1 F2 F3 F4 Function setting Ref address Sending data Grp 5 When the s...

Page 75: ...ress Specified indoor unit FAN operation Change refrigerant address or unit No Switch to function setting mode Press and at the same time with the remote controller stopped 11 1 2 Selecting functions using the wired remote controller PAR 21MAA First try to familiarize yourself with the flow of the function selection procedure In this section an example of setting the room temperature detection pos...

Page 76: ...refrigerant address and unit number may be incorrect so repeat steps and 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 performs fan operation there may be another refrigerant address that is the same as the specified one In this case check the DIP switch of the outdoor unit to see whether such ...

Page 77: ...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 If a unit number that cannot be recognized by the unit is entered 3 beeps of 0 4 seconds will be ...

Page 78: ...ton turns the backlight on and it will stay lit for a certain period of time depending on the screen Backlit LCD This lamp lights up in green while the unit is in operation It blinks while the remote controller is starting up or when there is an error ON OFF lamp Main display Press to change the operation mode Main menu Press to move the cursor down Function button F1 Main display Press to decreas...

Page 79: ... Vent Lossnay High power Restriction Maintenance Initial setting On Off timer Auto Off timer Manual vane angle Main Sub Timer Main display Contrast Display details Auto mode Administrator password Language selection Service Input maintenance info Function setting Check Self check Maintenance password Remote controller check Auto descending panel Test run Clock Menu structure of PAR 31MAA Auto retu...

Page 80: ...rforming energy save operation for a specif ed time period Time can be set to a value from 30 and 120 in 10 minute increments This function will not be valid when the preset temperature ranges are restricted Schedule Set the start stop times to operate the units in the energy save mode for each day of the week and set the energy saving rate Up to four energy save operation patterns can be set for ...

Page 81: ...ing up the Test run menu Test run Drain pump test run Input maintenance Select Input maintenance Info from the Service menu to bring up the Maintenance information screen The following settings can be made from the Maintenance Information screen Model name input Serial No input Dealer information input Function setting Make the settings for the indoor unit functions via the remote controller as ne...

Page 82: ... The automatic mode is displayed when the operation mode is selected OFF The automatic mode is not displayed when the operation mode is selected 4 3 Mode selection setting 1 Remote controller main sub setting To switch the setting press the ON OFF button Main The controller will be the main controller Sub The controller will be the sub controller 2 Use of clock setting To switch the setting press ...

Page 83: ... operation mode is selected Initial setting value 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...

Page 84: ...ect 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 Request code Ref address Request code Cursor Ref...

Page 85: ...Press the CLOCK buttons and to set the desired request code No 5 Press the FILTER button to perform data request The requested data will be displayed at 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 To display the updated data ca...

Page 86: ...asured by thermostat Indoor unit Intake air temperature Unit No 1 Heat mode 4 deg correction Indoor unit Intake air temperature Unit No 2 Heat mode 4 deg correction Indoor unit Intake air temperature Unit No 3 Heat mode 4 deg correction Indoor unit Intake air temperature Unit No 4 Heat mode 4 deg correction Indoor unit Liquid pipe temperature Unit No 1 Indoor unit Liquid pipe temperature Unit No 2...

Page 87: ...or postponement history 2 previous Outdoor unit Error postponement history 3 last but one 0 255 Refer to12 2 1 DetailContentsinRequestCode Refer to12 2 1 DetailContentsinRequestCode Refer to12 2 1 DetailContentsinRequestCode 0000 Not connected Examples Ver 5 01 Auxiliary information displayed after version information Examples Ver 5 01 A000 Displays postponement code is displayed if no postponemen...

Page 88: ...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 Liquidpipe1temperature TH3 attimeoferror Outdoor unit 2 phase pipe temperature TH6 at time of error Outdoor unit Outside air temperat...

Page 89: ...me 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 version in...

Page 90: ...display area C 4 Relay output state Operation mode Indoor unit Control state Request code 50 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 91: ... SV1 Four way valve Compressor 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 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 Error content 0 0 Error content Detected Display Overvoltage Undervoltage L1 phase Power...

Page 92: ...ity setting display Request code 70 Data display Capacity 10 50 9 35 11 60 14 71 20 100 25 125 28 140 40 200 50 250 Outdoor unit Setting information Request code 71 Data display Setting information Setting information 0 0 Setting information Display Defrost mode 0 Standard 1 For high humidity Setting information Display Single Heat pump 3 phase cooling only 0 Single phase Heat pump 1 Cooling only ...

Page 93: ... 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 00 0C 1...

Page 94: ...KAL PEAD RP JA L PLA RP AA2 PLA RP100BA3 140BA2 12 MEXZ GA VA L 32 13 33 14 34 15 35 16 36 17 37 18 38 19 39 1A 3A 1b 3b 1C 3C 1d 3d 1E 3E 1F 3F Indoor unit Capacity setting information Request code 163 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 13 160 04 28 14 200 05 32 15 224 06 35 36 16 2...

Page 95: ...P current COMP run time COMP On Off COMP frequency A Hz Hr times Hr Ref address Cool Ref address Cool Ref address Cool Sub cool OU TH4 temp OU TH6 temp OU TH7 temp IU air temp IU HEX temp IU filter time Select Smooth maintenance with the F1 or F2 button and press the button Select Check with the F1 or F2 button and press the button Select Service from the Main menu and press the button Set each it...

Page 96: ...e data with the air conditioner stopped skip to step 4 Fixed Hz operation The operating frequency can be fixed 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 3 Press the FILTER button to confirm the setting Display Waiting for stabilization HEAT STABLE MODE STABLE M...

Page 97: ...HOURS COMP ON x100 TIMES COMP ON CURRENT A Cumulative operation time ON OFF Number Operating current OUTDOOR UNIT H EXC TEMP OUTDOOR UNIT OUTLET TEMP OUTDOOR UNIT OUTDOOR TEMP Heat exchanger temperature Comp discharge temperature Outdoor ambient temperature INDOOR UNIT INLET TEMP INDOOR UNIT H EXC TEMP INDOOR UNIT FILTER USE H Indoor room temperature Heat exchanger temperature Filter operating tim...

Page 98: ...r temperature 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 outdoor intake ...

Page 99: ...tor and electrical parts box on the ceiling front side 7 Remove the fan motor fixing screws 4 for front 5 25 to detach the fan motor See Photo 3 3 Removing the electrical parts box 1 Remove the service panel See Photo 1 2 Remove the top panel See Photo 1 3 Disconnect the indoor outdoor connecting wire and power supply wire from the terminal block 4 Disconnect the connector CNF1 LEV A and LEV B on ...

Page 100: ...ect the lead wires from the wire clip on the outdoor controller board in the electrical parts box 5 Loosen the clamp for the lead wire in the rear of the electrical parts box See Photo 5 6 Pull out the thermistor Outdoor TH7 from the sensor holder Note When replacing thermistor Outdoor TH7 replace it together with thermistor Outdoor 2 phase pipe TH6 since they are combined together Refer to proced...

Page 101: ... pipes are not oxidized 9 Removing 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 ea...

Page 102: ...ding it in the air Note 2 The welded part can be removed easily by removing the side panel R Note 3 When installing the high pressure switch cover it with a wet cloth to prevent it from heating 100 C or more then braze the pipes so that the inside of pipes are not oxidized Lead wire of high pressure sensor High pressure sensor 63HS 12 Removing the high pressure sensor 63HS 1 Remove the service pan...

Page 103: ...h 11 Remove the welded pipe of compressor inlet and outlet then remove the compressor Note Recover refrigerant without spreading it in the air 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 Photo 4 6 Remove the valve bed...

Page 104: ... 3 MARUNOUCHI CHIYODA KU TOKYO 100 8310 JAPAN CCopyright 2013 MITSUBISHI ELECTRIC CORPORATION Distributed in Aug 2013 No OCH544 Made in Japan New publication effective Aug 2013 Specifications are subject to change without notice ...

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Mitsubishi Electric Mr.Slim PUHZ-FRP71VHA, Service Manual

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