Mitsubishi Electric PUHZ-FRP71VHA2 Service Manual
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Mitsubishi Electric PUHZ-FRP71VHA2 Service Manual

Mitsubishi Electric PUHZ-FRP71VHA2 Service Manual

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SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS
SERVICE MANUAL
Outdoor unit
[Model name]
PUHZ-FRP71VHA2
PUHZ-FRP71VHA2
[Service Ref.]
PUHZ-FRP71VHA2
PUHZ-FRP71VHA2R1
R410A
CONTENTS
1. REFERENCE MANUAL ···························· 2
2. SAFETY PRECAUTION ···························· 3
3. FEATURES ············································ 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 ····························· 68
BY THE REMOTE CONTROLLER ·············72
13. EASY MAINTENANCE FUNCTION ·········· 82
14. DISASSEMBLY PROCEDURE ················· 84
PARTS CATALOG (OCB665)
October 2019
No.OCH665
REVISED EDITION-B
Note:
• PUHZ-FRP71VHA2R1
has been added in
REVISED EDITION-B.
OCH665 REVISED
EDITION-A is void.
Note:
• This manual describes
only service data of the
outdoor units.

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Summary of Contents for Mitsubishi Electric PUHZ-FRP71VHA2

  • Page 1: Table Of Contents

    October 2019 No.OCH665 SERVICE MANUAL REVISED EDITION-B R410A Outdoor unit [Model name] Note: [Service Ref.] • PUHZ-FRP71VHA2R1 PUHZ-FRP71VHA2 PUHZ-FRP71VHA2 has been added in REVISED EDITION-B. PUHZ-FRP71VHA2R1 OCH665 REVISED EDITION-A is void. Note: • This manual describes only service data of the outdoor units.

  • Page 2: Reference Manual

    REFERENCE MANUAL INDOOR UNIT SERVICE MANUAL AIR-CONDITIONER system Model name Service Ref. Service Manual No. PLA-ZM35/71EA PLA-ZM35/71EA.UK OCH650/OCB650 PKA-M71KA(L) PKA-M71KA(L).TH OCH661/OCB661 PSA-RP71KA PSA-RP71KA OCH528/OCB528 PEAD-M71JA(L)Q PEAD-M71JA(L)Q.UK — PCA-M35/71KA PCA-M35/71KA OCH659/OCB659 For Air to Water system Service manual No. Model name Service ref.

  • Page 3: Safety Precaution

    SAFETY PRECAUTION 2-1. ALWAYS OBSERVE FOR SAFETY Before obtaining access to terminal, all supply circuits must be disconnected. 2-2. CAUTIONS RELATED TO NEW REFRIGERANT Cautions for units utilizing refrigerant R410A Preparations before the repair service. • Prepare the proper tools. •...
  • Page 4 [1] Cautions for service (1) Perform service after recovering the refrigerant left in unit completely. (2) Do not release refrigerant in the air. (3) After completing service, charge the cycle with specified amount of refrigerant. (4) If moisture or foreign matter might have entered the refrigerant piping during service, ensure to remove them. [2] Additional refrigerant charge When charging directly from cylinder (1) Check that cylinder for R410A on the market is syphon type.
  • Page 5 2-3. PRECAUTIONS WHEN REUSING EXISTING R22 REFRIGERANT PIPES (1) Flowchart • Refer to the flowchart below to determine if the existing pipes can be used and if it is necessary to use a filter dryer. • If the diameter of the existing pipes is different from the specified diameter, refer to technical data materials to confirm if the pipes can be used.
  • Page 6 (2) Cautions for refrigerant piping work New refrigerant R410A is adopted for replacement inverter series. Although the refrigerant piping work for R410A is same as for R22, exclusive tools are necessary so as not to mix with different kind of refrigerant. Furthermore as the working pressure of R410A is 1.6 times higher than that of R22, their sizes of flared sections and flare nuts are different.

  • Page 7: Features

    FEATURES PUHZ-FRP71VHA2 CHARGELESS SYSTEM PRE-CHARGED REFRIGERANT IS SUPPLIED FOR PIPING LENGTH AT SHIPMENT. Maximum 30m (Air conditioner side and hot water side total) The refrigerant circuit with LEV (Linear Expansion Valve) always control the optimal refrigerant level regardless of the length (Total 30 m maximum and 5 m minimum) of piping.

  • Page 8: Specifications

    SPECIFICATIONS PUHZ-FRP71VHA2 Service Ref. PUHZ-FRP71VHA2R1 Power source (Phase, cycle, voltage) Single, 50 Hz, 230 V Max. current External finish Munsell 3Y 7.8/1.1 Refrigerant control Linear Expansion Valve Compressor Hermetic Model SNB172FSHM1 Motor output Starter type Inverter Protection devices HP switch Comp.

  • Page 9: Data

    DATA 5-1. REFILLING REFRIGERANT CHARGE (R410A: kg) Total piping length (one way) Initial Service Ref. charged PUHZ-FRP71VHA2 — PUHZ-FRP71VHA2R1 Additional charge is required for pipes longer than total 30 m. 5-2. COMPRESSOR TECHNICAL DATA (Winding temperature at 20°C) PUHZ-FRP71VHA2 Service Ref.
  • Page 10 1 , 50 1 , 50 — 1 , 50 Voltage — Current 0.17 0.15 — 0.17 Outdoor unit PUHZ-FRP71VHA2 Phase, Hz 1 , 50 1 , 50 1 , 50 1 , 50 Voltage Current 9.14 9.22 8.81 13.97 Discharge pressure 2.79...

  • Page 11: Outlines And Dimensions

    OUTLINES AND DIMENSIONS PUHZ-FRP71VHA2 PUHZ-FRP71VHA2R1 Unit: mm OCH665B...

  • Page 12: Wiring Diagram

    WIRING DIAGRAM PUHZ-FRP71VHA2 PUHZ-FRP71VHA2R1 OCH665B...

  • Page 13: Wiring Specifications

    WIRING SPECIFICATIONS 8-1. FIELD ELECTRICAL WIRING (power wiring specifications) Outdoor unit power supply ~/N (single), 50 Hz, 230 V Outdoor unit input capacity Main switch (Breaker) 25 A Outdoor unit power supply 3 × Min. 2.5 Indoor unit – Outdoor unit 3 ×...
  • Page 14 8-2. SEPARATE INDOOR UNIT/OUTDOOR UNIT POWER SUPPLIES The following connection patterns are available. The outdoor unit power supply patterns vary on models. 1:1 System A Outdoor unit power supply <For models without heater> B Earth leakage breaker The optional indoor power supply terminal kit is required. C Wiring circuit breaker or isolating switch D Outdoor unit E Indoor unit/outdoor unit connecting cords...

  • Page 15: Refrigerant System Diagram

    REFRIGERANT SYSTEM DIAGRAM PUHZ-FRP71VHA2 PUHZ-FRP71VHA2R1 Stop valve Service port Refrigerant GAS pipe connection (5/8F) 4-way valve Stop valve Service port Charge Charge plug plug High pressure sensor (63HS) Accumulator High pressure switch (63H) Cylinder/ Muffler LEV-B LEV-C Indoor TH33 Hydrobox...
  • Page 16 9-1. REFRIGERANT COLLECTING (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.

  • Page 17: Troubleshooting

    TROUBLESHOOTING 10-1. TROUBLESHOOTING <Check code displayed by self-diagnosis and actions to be taken for service (summary)> Present and past check codes are logged, and they can be displayed on the control board 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.
  • Page 18 10-2-1. Test run for wired remote controller <PAR-4xMAA ("x" represents 0 or later)> MENU RETURN SELECT ON/OFF Function buttons Select "Service" from the Main menu, and press the [ ] button. Test run Input maintenance info. Settings Check Select "Test run" with the F1 or F2 button, and press the [ ] button.
  • Page 19 <Error information> When an error occurs, the following screen will appear. Check the error status, stop the operation, and consult your dealer. Check code, error unit, refrigerant address, unit model name, and Error information serial number will appear. (Date and time of occurrence of the er- Error code ror will also appear on PAR-4xMAA.) Error unit...
  • Page 20 <Checking the error information> Maintenance menu While no errors are occurring, page 2/2 of the error information Error information can be viewed by selecting "Error information" from the Mainte- Filter information Cleaning nance menu (PAR-4xMAA) or Main menu (PAR-3xMAA). Errors cannot be reset from this screen. Main menu: Cursor <Error history>...
  • Page 21 10-2-4. Test run for wireless remote controller 1 Turn on the main power to the unit. 2 Press the TEST RUN button twice continuously. (Start this operation from the status of remote controller display TEST RUN turned off.) TEST RUN and current operation mode are displayed.
  • Page 22 10-3. HOW TO PROCEED "SELF-DIAGNOSIS" 10-3-1. Self-diagnosis <PAR-4xMAA ("x" represents 0 or later)> Select "Service" from the Main menu, Diagnosis and press the [ ] button. Self check Remote controller check Select "Check" from the Service menu, and press the [ ] button.
  • Page 23 10-3-2. Remote controller check <PAR-4xMAA ("x" represents 0 or later)> If operations cannot be completed with the remote controller, diagnose the remote controller with this function. Select "Service" from the Main menu, and press the [ ] button. Diagnosis Self check Remote controller check Select "Check"...
  • Page 24 10-3-6. Self-diagnosis <wireless remote controller> <In the case of trouble during operation> When a malfunction occurs to air conditioner, both indoor unit and outdoor unit will stop and operation lamp blinks to inform unusual stop. < Malfunction-diagnosis method at maintenance service> [Procedure] 1.
  • Page 25 • Refer to the following tables for details on the check codes. [Output pattern A] Beeper sounds Beep Beep Beep Beep Beep Beep Beep OPERATION · · · Repeated INDICATOR lamp blink pattern Approx. 2.5 s 0.5 s 0.5 s 0.5 s Approx.
  • Page 26 10-4. SELF-DIAGNOSIS ACTION TABLE (Note 1) Refer to indoor unit section for code P and code E. <Abnormalities detected when the power is put on> Abnormal points and detection method Judgment and action Check Code Cause 1 No voltage is supplied to termi- 1 Check following items.
  • Page 27 Check Code Abnormal points and detection method Cause Judgment and action 1 Contact failure or miswiring of 1 Check disconnection or looseness or polarity Miswiring of indoor/outdoor unit of indoor/outdoor unit connecting wire of indoor/outdoor unit connecting connecting wire indoor and outdoor units. wire Outdoor controller circuit board can automatically check the number of...
  • Page 28 <Abnormalities detected while unit is operating> Abnormal points and detection method Judgment and action Check Code Cause 1 Short cycle of indoor unit 1–6 Check indoor unit and repair defect. High pressure (High pressure switch 2 Clogged filter of indoor unit 63H operated) 3 Decreased airflow caused by Abnormal if high pressure switch 63H oper-...
  • Page 29 Abnormal points and detection method Judgment and action Check Code Cause Open/short of outdoor unit thermistors 1 Disconnection or contact failure 1 Check connection of connector (TH3,TH6/TH7) (TH3, TH6, TH7, and TH8) of connectors on the outdoor controller circuit board. Abnormal if open or short is detected during Outdoor controller circuit Check connection of connector (CN6) on the...
  • Page 30 Abnormal point and detection method Cause Judgment and action Check Code To find out the detail history (latest) about U9 error, turn ON SW2-1, 2-2, 2-6. Detailed Refer to "10-10. FUNCTION OF SWITCHES, CONNECTORS AND JUMPERS". codes Overvoltage error 1 Check the field facility for the power 1 Abnormal increase in power source •...
  • Page 31 Abnormal point and detection method Judgment and action Check Code Cause 1 Defective outdoor fan (fan 1 Check outdoor unit air passage. Over heat protection motor) or short cycle of outdoor Abnormal if outdoor pipe thermistor (TH3) unit during cooling operation detects 70°C or more during compressor 2 Defective outdoor pipe 23 Turn the power off and on again to check...
  • Page 32 Abnormal points and detection method Cause Judgment and action Check Code Remote controller transmission error 1 Contact failure at transmission 1 Check disconnection or looseness of indoor (E0)/signal receiving error (E4) wire of remote controller unit or transmission wire of remote controller. Abnormal if main or sub remote controller 2 All remote controllers are set 2 Set one of the remote controllers “main”...
  • Page 33 Check Code Abnormal points and detection method Judgment and action Cause Indoor/outdoor unit communication Note: Check LED display on outdoor controller error (Signal receiving error) circuit board. (Connect A-Control service Abnormal if indoor controller board could tool (PAC-SK52ST)) not receive any signal normally for 6 Refer to EA–EC item if LED displays EA–AC.
  • Page 34 Check Code Abnormal points and detection method Judgment and action Cause Serial communication error 1 Breaking of wire or contact 12 Check connection of each connector CN2 Abnormal if serial communication failure of connector CN2 and CN4 between the outdoor controller between outdoor controller circuit between the outdoor controller circuit board and the outdoor power circuit...
  • Page 35 10-5. TROUBLESHOOTING OF PROBLEMS Phenomena Factor Countermeasure 1. Remote controller display does not 1 12 V DC is not supplied to remote controller. 1 Check LED2 on indoor controller board. work. (Power supply display is not indicated on LCD.) (1) When LED2 is lit: Check the remote controller wiring for breaking or contact failure.
  • Page 36 Factor Phenomena Countermeasure 6. Remote controller display works 1 Refrigerant shortage 1 • If refrigerant leaks, discharging tempera- normally and the unit performs cool- ture rises and LEV opening increases. ing operation, however, the capacity Inspect leakage by checking the tem- cannot be fully obtained.
  • Page 37 Symptoms: “PLEASE WAIT” is kept being displayed on the remote controller. Inspection method and Diagnosis flow Cause troubleshooting Check the display time of “PLEASE WAIT” after turning on the main power. 6 minutes 2 minutes or more or less How long is “PLEASE WAIT” •...
  • Page 38 LED display of the indoor controller board Symptoms: Nothing is displayed on the remote controller 1 LED1: LED2: LED3: Inspection method and Diagnosis flow Cause troubleshooting Check the voltage between S1 and S2 on the terminal block (TB4) of the indoor unit which is used to connect the indoor unit and the outdoor unit.
  • Page 39 LED display of the indoor controller board Symptoms: Nothing is displayed on the remote controller 2 LED1 : LED2 : LED3 : Inspection method and Diagnosis flow Cause troubleshooting Check the voltage between S1 and S2 on the terminal block (TB4) of the indoor unit which is used to connect the indoor unit and the outdoor unit.
  • Page 40 LED display of the indoor controller board Symptoms: Nothing is displayed on the remote controller 3 LED1 : LED2 : LED3 : — Inspection method and Diagnosis flow Cause troubleshooting Check the voltage of the terminal block (TB6) of the remote controller. •...
  • Page 41 • Before repair Frequent calls from customers Phone Calls From Customers How to Respond Note 1 The operating display of remote 1 Check if power is supplied to air conditioner. Unit does not operate controller does not come on. Nothing appears on the display unless power is at all.
  • Page 42 Phone Calls From Customers How to Respond Note The room cannot be cooled or heated sufficiently. 1 Check the set temperature of remote controller. The outdoor unit cannot be operated if the set temperature is not appropriate. The outdoor unit operates in the following modes. COOL: When the set temperature is lower than the room temperature.
  • Page 43 Phone Calls From Customers How to Respond Note 3 Air blows out for a while after Something However, this control is also 3 This is not a malfunction. is wrong HEAT operation is stopped. applied to the models which The blower is operating just for cooling down the with the heated-up air conditioner.
  • Page 44 Phone Calls From Customers How to Respond Note A white mist is expelled from the indoor unit. This is not a malfunction. This may occur when the operation is started in the room of high humidity. Water or moisture is expelled from the outdoor COOL: When pipes or piping joints are cooled, they unit.
  • Page 45 10-6. HOW TO CHECK THE PARTS PUHZ-FRP71VHA2 Parts name Checkpoints Thermistor (TH3) Disconnect the connector then measure the resistance with a tester. <Liquid> (At the ambient temperature 10 to 30°C) Thermistor (TH4) Normal Abnormal <Discharge> Thermistor (TH6) TH4, TH33 160 to 410 kΩ...
  • Page 46 Check method of DC fan motor (fan motor/indoor controller circuit board) 1 Notes · High voltage is applied to the connector (CNF1) for the fan motor. Pay attention to the service. · Do not pull out the connector (CNF1) for the motor with the power supply on. (It causes trouble of the indoor controller circuit board and fan motor.) 2 Self check S ymptom: The outdoor fan cannot turn around.
  • Page 47 10-7. HOW TO CHECK THE COMPONENTS <Thermistor feature chart> Low temperature thermistors • Thermistor <Liquid> (TH3) • Thermistor <2-phase pipe> (TH6) • Thermistor <Ambient> (TH7) Thermistor R0 = 15 kΩ ± 3% B constant = 3480 ± 2% =15exp{3480( – 273+t 0°C 15 kΩ...
  • Page 48 Linear expansion valve (1) Operation summary of the linear expansion valve • Linear expansion valve opens/closes through stepping motor after receiving the pulse signal from the outdoor controller board. • Valve position can be changed in proportion to the number of pulse signal. <Connection between the outdoor controller board and the linear expansion valve>...
  • Page 49 (3) How to attach and detach the coil of linear expansion valve <Composition> Linear expansion valve is separable into the main body and the coil as shown in the diagram below. Main body Coil Lead wire Stopper <How to detach the coil> Hold the lower part of the main body (shown as A) firmly so that the main body does not move and detach the coil by pulling it upward.
  • Page 50 10-8. EMERGENCY OPERATION (ATA only) (1) When the check codes shown below are displayed on outdoor unit or microprocessor for wired remote controller or indoor unit has a failure, but no other problems are found, emergency operation will be available by setting the emergency opera- tion switch (SWE) on indoor controller board to ON and short-circuiting the connector (CN31) on outdoor controller board.
  • Page 51 (5) Operation data during emergency operation During emergency operation, no communication is performed with the indoor unit, so the data items needed for operation are set to the following values: Operation mode Operation data Remarks COOL HEAT Intake temperature (TH1) 27°C 20.5°C —...
  • Page 52 10-9. TEST POINT DIAGRAM Outdoor controller circuit board <CAUTION> TEST POINT1 is high voltage. PUHZ-FRP71VHA2 PUHZ-FRP71VHA2R1 CN51 21S4 External signal output 4-way valve CNDM • Compressor operating 1 to 2: Input of low-level sound priority mode signal Manual defrost, 1 to 3: Input of external contact point •...
  • Page 53 Outdoor power circuit board Brief Check of POWER MODULE PUHZ-FRP71VHA2 If they are short-circuited, it means that they are broken. Measure the resistance in the following points (connectors, etc.). PUHZ-FRP71VHA2R1 1. Check POWER MODULE 1 Check of DIODE circuit – P1 S –...
  • Page 54 10-10. FUNCTION OF SWITCHES, CONNECTORS AND JUMPERS (1) Function of switches The black square ( ) indicates a switch position. Type Action by the switch operation Switch No. Function Effective timing switch When compressor is working Manual defrost Start Normal in ATA heating and ATW heating operation.
  • Page 55 The black square ( ) indicates a switch position. Action by the switch operation Type of Switch No. Function Effective timing Switch No function — — — Power failure Auto recovery No auto recovery When power supply ON automatic recovery No function —...
  • Page 56 (2) Function of connector Action by open/ short operation Types Function Effective timing Connector Short Open Connector CN31 Start Emergency operation Normal When power supply ON Special function (a) Low-level sound priority mode (Local wiring) By performing the following modification, operation noise of the outdoor unit can be reduced by about 3-4 dB. The low noise mode will be activated when a commercially available timer or the contact input of an ON/OFF switch is added to the CNDM connector (option) on the control board of the outdoor unit.
  • Page 57 <Display function of inspection for outdoor unit> The blinking patterns of both LED1 (green) and LED2 (red) indicate the types of abnormality when it occurs. Types of abnormality can be indicated in details by connecting an optional part ‘A-Control Service Tool (PAC-SK52ST)’ to connector CNM on outdoor controller board.
  • Page 58 Indication Error Outdoor controller board Check Detailed Contents Inspection method code reference page LED1 (Green) LED2 (Red) 1Check if stop valves are open. 3 blinking 1 blinking Abnormality of comp. surface thermistor (TH33) and discharging 2Check if connectors (TH4, TH33, LEV-A, and LEV-B) on temperature (TH4) outdoor controller board are not disconnected.
  • Page 59 <Outdoor unit operation monitor function> [When optional part ‘A-Control Service Tool (PAC-SK52ST)’ is connected to outdoor controller board (CNM)] Digital indicator LED1 displays 2 digit number or code to inform operation condition and the meaning of check code by controlling DIP SW2 on ‘A-Control Service Tool’. Operation indicator SW2: Indicator change of self-diagnosis SW2 setting...
  • Page 60 The black square ( ) indicates a switch position. SW2 setting Display detail Explanation for display Unit Indoor room temperature (TH1) 8–39 8–39 °C 2 3 4 5 6 −39–88 Indoor pipe temperature/Liquid (TH2) (When the temperature is 0°C or less, “–” and °C Indoor temperature are displayed by turns.)
  • Page 61 The black square ( ) indicates a switch position. SW2 setting Display detail Explanation for display Unit −39–88 FTC pipe temperature/liquid (TH2) −39–88 (When the temperature is 0°C or less, “–” and °C temperature are displayed by turns.) 2 3 4 5 6 −39–88 Outdoor pressure sensor satu- rated temperature (63HS)
  • Page 62 The black square ( ) indicates a switch position. SW2 setting Display detail Explanation for display Unit Input current of outdoor unit 0–500 (When it is 100 or more, hundreds digit, tens digit 0.1 A and ones digit are displayed by turns.) 2 3 4 5 6 DC bus voltage 180–380...
  • Page 63 The black square ( ) indicates a switch position. SW2 setting Display detail Explanation for display Unit Capacity save 0–100 (When the capacity is 100% hundreds digit, tens digit and 0–100 When air conditioner is connected ones digit are displayed by turns.) (Example) When 100%;...
  • Page 64 The black square ( ) indicates a switch position. SW2 setting Display detail Explanation for display Unit Thermostat ON time 0–999 0–999 (When it is 100 minutes or more, the hundreds digit, tens digit and ones digit are displayed by turns.) (Example) When 245 minutes;...
  • Page 65 The black square ( ) indicates a switch position. SW2 setting Display detail Explanation for display Unit Error history (2) When no error history, Alternate display of error unit num- “ 0 ” and “– –” are displayed by turns. Code ber and code display...
  • Page 66 The black square ( ) indicates a switch position. SW2 setting Display detail Explanation for display Unit −40–186 Outdoor heatsink temperature (TH8) on error occurring (When the temperature is 0°C or less, “–” and −40–186 temperature are displayed by turns.) (When the temperature is 100°C or more, hundreds digit, °C tens digit and ones digit are displayed by turns.)
  • Page 67 The black square ( ) indicates a switch position. SW2 setting Display detail Explanation for display Unit Error thermistor display 3: Outdoor liquid temperature (TH3) 4: Outdoor discharge temperature (TH4) When there is no error thermistor, 6: Outdoor 2-phase temperature (TH6) “–“...

  • Page 68: Function Setting

    FUNCTION SETTING 11-1. UNIT FUNCTION SETTING BY THE REMOTE CONTROLLER Each function can be set as necessary using the remote controller. The setting of function for each unit can only be done by the remote controller. Select function available from the table 1. <Table 1>...
  • Page 69 11-1-1. Selecting functions using the wired remote controller <PAR-4xMAA ("x" represents 0 or later)> <Service menu> Maintenance password is required Select "Service" from the Main menu, and press the [ ] button. Main Main menu *At the main display, the menu button and select "Service" to make the Service maintenance setting.
  • Page 70 <Function setting> Settings menu Select "Service" from the Main menu, and press the [ ] button. Function setting Select "Setting" from the Service menu, and press the [ ] button. Service menu: Select "Function setting", and press the [ ] button. Set the indoor unit refrigerant addresses and unit numbers with the F1 Function setting Ref.
  • Page 71 11-1-2. Selecting functions using the wireless remote controller (Type C) Functions can be selected with the wireless remote controller. Function selection using wireless remote controller is available only for refriger- ant system with wireless function. Refrigerant address cannot be specified by the wireless remote controller. [Flow of function selection procedure] Flow of function selection procedure The flow of the function selection procedure is shown below.

  • Page 72: Monitoring The Operation Data By The Remote Controller

    MONITORING THE OPERATION DATA BY THE REMOTE CONTROLLER 12-1. HOW TO "MONITOR THE OPERATION DATA" 12-1-1. PAR-4xMAA ("x" represents 0 or later) Details on the operation data including each thermistor temperature and error history can be confirmed with the remote controller. Check menu Select "Service"...
  • Page 73 12-2. Request code list Certain indoor/outdoor combinations do not have the request code function; therefore, no request codes are displayed. Description Request content Unit Remarks (Display range) 0 Operation state Refer to “12-2-1. Detail Contents in Request Code”. – 1 Compressor-Operating current (rms) 0–50 2 Compressor-Accumulated operating time 0–9999...
  • Page 74 Description Request content Unit Remarks (Display range) 50 Indoor unit-Control state Refer to “12-2-1. Detail Contents in Request Code”. – 51 Outdoor unit-Control state Refer to “12-2-1. Detail Contents in Request Code”. – 52 Compressor-Frequency control state Refer to “12-2-1. Detail Contents in Request Code”. –...
  • Page 75 Description Request content Unit Remarks (Display range) Displays the history. (" - - " is 103 Error history 1 (latest) Code displayed if no history is present.) Displays the history. (" - - " is 104 Error history 2 (second to last) Code displayed if no history is present.) Displays the history.
  • Page 76 Description Request content Unit Remarks (Display range) 154 Indoor-Fan operating time 0–9999 1 hour (After filter is reset) Indoor-Total operating time 0–9999 10 hours (Fan motor ON time) 157 Indoor fan output value (Sj value) 0–255 Fan control data – For indoor fan phase control Indoor fan output value "00 **"...
  • Page 77 12-2-1. Detail Contents in Request Code Example) Request code "004" Request code Discharge temperature 156°F Ref.address Request code Refrigerant address "00" Request: Cursor [Operation state] (Request code ": 0 ") Relay output state Power currently Power currently Data display Display Display Compressor Compressor...
  • Page 78 [Fan control state] (Request code :" 53 ") <Refer to P69.> Data display Fan step correction value by heatsink temperature overheat prevention control Fan step correction value by cool condensation temperature overheat prevention control Display Correction value - (minus) – 1 [Actuator output state] (Request code :"54") <Refer to P62.>...
  • Page 79 [Contact demand capacity] (Request code : " 61") <Refer to P59.> Setting content Data display Display Setting value Setting content 100% [External input state] (Request code : "62") <Refer to P59.> Input state : Input present Data display Contact demand Silent mode Spare 1 Spare 2...
  • Page 80 [Outdoor unit switch setting display (SW1 to SW10, except SW3)] Request codes: 73 to 82 0: Switch OFF 1: Switch ON 0: Switch OFF 1: Switch ON SW1, SW2, SW6, SW7 Data display Data display 00 00 00 00 00 01 00 01 00 02 00 02...
  • Page 81 [Indoor unit – Capacity setting information] (Request code : "163") Data display Display Capacity setting state Display Capacity setting state See the table on the right. 35, 36 [Wireless pair No. (indoor control board side) setting] (Request code :" 165") Data display Display Pair No.

  • Page 82: Easy Maintenance Function

    EASY MAINTENANCE FUNCTION 13-1. SMOOTH MAINTENANCE Maintenance data, such as the indoor/outdoor unit’s heat exchanger temperature and compressor operation current can be displayed with “Smooth maintenance”. This cannot be executed during test operation. Depending on the combination with the outdoor unit, this may not be supported by some models. Check menu Select "Service"...
  • Page 83 <Guide for operation condition> Checkpoints into the graph given below. Enter the temperature differences between Operation state is determined according to the plotted areas on the graph. For data measurements, set the fan speed to "Hi" before activating maintenance mode. Inspection item Result Classification...

  • Page 84: Disassembly Procedure

    DISASSEMBLY PROCEDURE PUHZ-FRP71VHA2 PUHZ-FRP71VHA2R1 : Indicates the visible parts in the photos/figures. : Indicates the invisible parts in the photos/figures. OPERATING PROCEDURE PHOTOS/FIGURES 1. Removing the service panel and top panel Photo 1 Top panel fixing screws (1) Remove 3 service panel fixing screws (5 × 12) and slide...
  • Page 85 OPERATING PROCEDURE PHOTOS/FIGURES 4. Removing the thermistor <Liquid> (TH3) and the thermis- Photo 5 tor <2-phase pipe> (TH6) Electrical parts box (1) Remove the service panel. (See Photo 1) Clamp (2) Remove the top panel. (See Photo 1) (3) Disconnect the connector TH7/6 (red) and TH3 (white)on the controller circuit board in the electrical parts box.
  • Page 86 OPERATING PROCEDURE PHOTOS/FIGURES 7. Removing the 4-way valve coil (21S4), LEV coil (LEV(A), Photo 8 4-way valve coil LEV(B), LEV(C)) and solenoid valve coil (SV1, SV2, SV3) fixing screw (1) Remove the service panel. (See Photo 1) (2) Remove the top panel. (See Photo 1) (3) Remove the electrical parts box.
  • Page 87 OPERATING PROCEDURE PHOTOS/FIGURES 11. Removing the high pressure switch (63H) Photo 10 Lead wire of high Lead wire of high (1) Remove the service panel. (See Photo 1) pressure switch pressure sensor (2) Remove the top panel. (See Photo 1) (3) Remove the electrical parts box.
  • Page 88 OPERATING PROCEDURE PHOTOS/FIGURES 14. Removing the compressor (MC) Photo 12 (1) Remove the service panel. (See Photo 1) Valve bed Valve bed (2) Remove the top panel. (See Photo 1) fixing (3) Remove the cover panel (front) fixing screws (2 for front, 5 screws ×...
  • Page 89 OCH665B...
  • Page 90 HEAD OFFICE: TOKYO BUILDING, 2-7-3, MARUNOUCHI, CHIYODA-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 Specifications are subject to change without notice.

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