Mitsubishi Electric PUHZ-FRP71VHA Service Manual

Split-type, heat pump air conditioner

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Summary of Contents for Mitsubishi Electric PUHZ-FRP71VHA

Page 1 No.OCH544 SERVICE MANUAL R410A Outdoor unit Note: [Model name] [Service Ref.] • This manual describes only PUHZ-FRP71VHA service data of the outdoor PUHZ-FRP71VHA units. • RoHS compliant products have <G> mark on the spec name plate. CONTENTS 1. REFERENCE MANUAL ·································...
Page 2: Reference Manual
REFERENCE MANUAL INDOOR UNIT SERVICE MANUAL For Air to Air system Service Model name Service Ref. Manual No. OCH535 PLA-ZRP35/50/60/71/125/140BA PLA-ZRP35/50/60/71/125/140BA.UK OCB535 PCA-RP35/100/125/140KAQ OCH491 PCA-RP35/50/60/71/100/125/140KAQ PCA-RP50/60/71KAQR1 OCB491 OCH492 PCA-RP71/125HAQ PCA-RP71/125HAQ OCB492 OCH453 PKA-RP35/50HAL PKA-RP35/50HAL OCB453 OCH452 PKA-RP60/71/100KAL PKA-RP60/71/100KAL OCB452 OCH528 PSA-RP71/100/125/140KA PSA-RP71/100/125/140KA OCB528...
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 Preparation before the repair service. • Prepare the proper tools. •...
Page 4: Cautions For Service
[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) When performing service, install a filter drier simultaneously. Be sure to use a filter drier for new refrigerant.
Page 5: Precautions When Reusing Existing R22 Refrigerant Pipes
2-3. PRECAUTIONS WHEN REUSING EXISTING R22 REFRIGERANT PIPES (1) Flowchart • Refer to the f owchart below to determine if the existing pipes can be used and if it is necessary to use a f lter dryer. • If the diameter of the existing pipes is different from the specif ed diameter, refer to technological data materials to conf rm 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-FRP71VHA CHARGELESS SYSTEM PRE-CHARGED REFRIGERANT IS SUPPLIED FOR PIPING LENGTH AT SHIPMENT. Max. 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 max.
Page 8: Specifications
SPECIFICATIONS Service Ref. PUHZ-FRP71VHA Power supply (phase, cycle, voltage) Single, 50 Hz, 230 V Max. current External finish Munsell 3Y 7.8/1.1 Linear Expansion Valve Refrigerant control Compressor Hermetic SNB172FSHM1 Model Motor output Starter type Inverter HP switch Protection devices Comp. surface thermo...
Page 9: Noise Criterion Curves
DATA 5-1. REFILLING REFRIGERANT CHARGE (R410A : kg) Total piping length (one way) Initial Service Ref. charged PUHZ-FRP71VHA — Additional charge is required for pipes longer than total 30 m. 5-2. COMPRESSOR TECHNICAL DATA (at 20°C) Service Ref. PUHZ-FRP71VHA Compressor model SNB172FSHM1 1.34...
Page 10: Standard Operation Data
1 , 50 1 , 50 — 1 , 50 Voltage — Current 0.17 0.15 — 0.17 Outdoor unit PUHZ-FRP71VHA Phase, Hz 1 , 50 1 , 50 1 , 50 1 , 50 Voltage Current 9.15 9.12 8.70 13.97 Discharge pressure 2.79...
Page 11: Outlines And Dimensions
OUTLINES AND DIMENSIONS PUHZ-FRP71VHA Unit : mm OCH544...
Page 12: Wiring Diagram
WIRING DIAGRAM PUHZ-FRP71VHA 63HS LEV-A LEV-B LEV-C TH34 C. B. t° t° t° t° t° CNF1 (WHT) TH7/6 63HS TH34 LEV-A LEV-B (RED) (WHT) (WHT) (WHT) (RED) (WHT) (RED) (WHT) CN31 (YLW) CN52C (WHT) (WHT) (RED) TRANS CNDC LEV-C (PNK)
Page 13: Field Electrical Wiring (Power 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: Separate Indoor Unit/ Outdoor Unit Power Supplies
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 <For models without heater> Outdoor unit power supply * The optional indoor power supply terminal kit is required. Earth leakage breaker Wiring circuit breaker or isolating switch Outdoor unit...
Page 15: Refrigerant System Diagram
REFRIGERANT SYSTEM DIAGRAM PUHZ-FRP71VHA Unit : mm (inch) 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...
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 gas 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 <Error code display by self-diagnosis and actions to be taken for service (summary)> Present and past error codes are logged and displayed on the wired remote controller and control board of outdoor unit. Actions to be taken for service, which depends on whether or not the trouble is reoccurring at service, are summarized in the table below.
Page 18: Test Run Operation
10-2-2. Test run for wired remote controller <PAR-31MAA> MENU RETURN SELECT ON/OFF Function buttons Select "Service" from the Main menu, and press the button. Test run Input maintenance info. Function setting Check Self check Select "Test run" with the F1 or F2 button, and press the button.
Page 19: Error Information
<Error information> When an error occurs, the following screen will appear. Check the error status, stop the operation, and consult your dealer. Error code, error unit, refrigerant address, unit model name, and serial Error information number will appear. Error code The model name and serial number will appear only if the information have Error unit Ref.
Page 20: Error History
<Checking the error information> While no errors are occurring, page 2/2 of the error information can be viewed by Main Main menu selecting "Error information" from the Main menu. Restriction Energy saving Errors cannot be reset from this screen. Night setback Filter information Error information Main display:...
Page 21: Operating Procedures
10-2-3. Test run for wired remote controller <PAR-21MAA> Operating procedures While the room temperature display on the remote "TEST RUN" and the currently selected controller is “PLEASE WAIT”, the remote controller is disabled. operation mode are displayed alternately. Wait until “PLEASE WAIT” disappears before using remote controller. 1.
Page 22: Test Run For Wireless Remote Controller
10-2-4. Test run for wireless remote controller 1 Turn on the main power to the unit. 2 Press the button twice continuously. TEST RUN (Start this operation from the status of remote controller display TEST RUN turned off.) TEST RUN and current operation mode are displayed.
Page 23: How To Proceed "Self-Diagnosis
10-3. HOW TO PROCEED "SELF-DIAGNOSIS" 10-3-1. Self-diagnosis <PAR-31MAA> Select "Service" from the Main menu, and press the button. Test run Input maintenance info. Function setting Check Select "Self check" with the F1 or F2 button, and press the button. Self check With the F1 or F2 button, enter the refrigerant address, and press the button.
Page 24: Remote Controller Check
10-3-2. Remote controller check <PAR-31MAA> * 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. Maintenance password Remote controller check Select "Remote controller check" with the F1 or F2 button, and press the button.
Page 25 10-3-3. Self-dignosis <PAR-21MAA> If a problem occurs in the air conditioner, the indoor and outdoor units will stop, and the problem is shown in the remote controller display. [CHECK] and the refrigerant address are displayed on the temperature display, and the error code and unit number are displayed alternately as shown below.
Page 26: Remote Controller Diagnosis
When the error history is reset, the display will look like the one shown below. Press the ON/OFF button twice within 3 seconds. However, if you fail to reset the error history, the error content will be displayed again. The self-diagnosis address or refrigerant address will blink. Cancel self-diagnosis.
Page 27 10-3-6. Self-diagnosis <wireless remote controller> <In 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 28 • 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 flash pattern Approx. 2.5 sec. 0.5 sec. 0.5 sec. 0.5 sec.
Page 29: Self-Diagnosis Action Table
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 Error Code Case 1 No voltage is supplied to termi- 1 Check following items.
Page 30 Abnormal points and detection method Case Judgment and action Error Code 1 Contact failure or miswiring of 1 Check disconnection or looseness or polarity Miswiring of indoor/outdoor unit indoor/outdoor unit connecting of indoor/outdoor unit connecting wire of connecting wire wire indoor and outdoor units.
Page 31 <Abnormalities detected while unit is operating> Abnormal points and detection method Judgment and action Error Code Case High pressure (High pressure switch 1 Short cycle of indoor unit 1~6 Check indoor unit and repair defect. 63H operated) 2 Clogged filter of indoor unit Abnormal if high pressure switch 63H oper- 3 Decreased airflow caused by ated (4.15 MPa) during compressor opera-...
Page 32 Abnormal points and detection method Judgment and action Case Error Code 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 Outdoor controller circuit Check connection of connector (CN3) on the...
Page 33 Abnormal point and detection method Judgment and action Case Error Code To find out the detail history (latest) about U9 error, turn ON SW2-1, 2-2, 2-6. Detailed Refer to 10-10. codes Overvoltage error 1 Check the field facility for the power 1 Abnormal increase in power source •...
Page 34 Abnormal point and detection method Judgment and action Case Error Code 1 Defective outdoor fan (fan Over heat protection 1 Check outdoor unit air passage. motor) or short cycle of outdoor Abnormal if outdoor pipe thermistor (TH3) unit during cooling operation detects 70: or more during compressor 2 Defective outdoor pipe operation.
Page 35 Abnormal points and detection method Case Judgment and action Error 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. 1 Abnormal if main or sub remote control- 2 All remote controllers are set 2 Set one of the remote controllers “main”...
Page 36 Error Code Abnormal points and detection method Judgment and action Case Indoor/outdoor unit communication * Check LED display on outdoor controller 1 Contact failure, short circuit or error (Signal receiving error) miswiring (converse wiring) of circuit board. (Connect A-Control service tool 1 Abnormal if indoor controller board could indoor/outdoor unit connecting (PAC-SK52ST))
Page 37 Error Code Abnormal points and detection method Judgment and action Case Serial communication error 1 Breaking of wire or contact 12 Check connection of each connector CN2 1Abnormal 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 38: Troubleshooting Of Problems
10-5. TROUBLESHOOTING OF PROBLEMS Phenomena Factor Countermeasure 1. Remote controller display does not 1 DC12V 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. 2 DC12~15V is supplied to remote controller, however, Check the remote controller wiring for no display is indicated.
Page 39 Factor Phenomena Countermeasure 6. Remote controller display works 1 Refrigerant shortage 1 • If refrigerant leaks, discharging tempera- normally and the unit performs cool- 2 Filter clogging ture rises and LEV opening increases. ing operation, however, the capacity Inspect leakage by checking the tem- 3 Heat exchanger clogging cannot be fully obtained.
Page 40 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 41: Symptoms: Nothing Is Displayed On The Remote Controller
LED display of the indoor controller board Symptoms: Nothing is displayed on the remote controller 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 42 LED display of the indoor controller board Symptoms: Nothing is displayed on the remote controller 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 43 LED display of the indoor controller board Symptoms: Nothing is displayed on the remote controller LED1 : LED2 : LED3 : — Inspection method and Diagnosis flow Cause troubleshooting Check the voltage of the terminal block (TB6) of the remote controller. DC 10V to DC 16V? •...
Page 44 • Before repair Frequent calling from customers Phone Calls From Customers How to Respond Note Unit does The operating display of remote Check if power is supplied to air conditioner. not operate controller does not come on. Nothing appears on the display unless power is at all.
Page 45 Phone Calls From Customers How to Respond Note The room cannot be cooled or heated sufficiently. 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 46 Phone Calls From Customers How to Respond Note However, this control is also Something Air blows out for a while after This is not a malfunction. is wrong HEAT operation is stopped. The blower is operating just for cooling down the applied to the models which with the heated-up air conditioner.
Page 47 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 gets started in the room of high humidity. Water or moisture is expelled from the outdoor Cooling;...
Page 48 10-6. HOW TO CHECK THE PARTS PUHZ-FRP71VHA Parts name Check points Thermistor (TH3) Disconnect the connector then measure the resistance with a tester. <Outdoor pipe> (At the ambient temperature 10 ~30 ) Thermistor (TH4) Normal Abnormal <Discharge> Thermistor (TH6) TH4, TH34 160k ~410k <Outdoor 2-phase pipe>...
Page 49 Check method of DC fan motor (fan motor / outdoor controller circuit board) Notes · High voltage is applied to the connecter (CNF1, 2) for the fan motor. Pay attention to the service. · Do not pull out the connector (CNF1, 2) for the motor with the power supply on. board and fan motor.) (It causes trouble of the outdoor controller circuit Self check...
Page 50 10-7. HOW TO CHECK THE COMPONENTS <Thermistor feature chart> Low temperature thermistors • Thermistor <Outdoor pipe> (TH3) • Thermistor <Outdoor 2-phase pipe> (TH6) • Thermistor <Outdoor> (TH7) Thermistor R0 = 15k' ± 3% B constant = 3480 ± 2% =15exp{3480( –...
Page 51: Linear Expansion Valve
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 52 (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 53 10-8. EMERGENCY OPERATION (ATA only) (1) When the error codes shown below are displayed on outdoor unit or microcomputer 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 54 (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) 20.5 —...
Page 55: Test Point Diagram
10-9. TEST POINT DIAGRAM Outdoor controller circuit board <CAUTION> TEST POINT1 is high voltage. PUHZ-FRP71VHA CN51 CNDM External signal output Forced defrost, 1 to 2: Input of low-level sound priority mode Demand control setting • Compressor operating signal detect history...
Page 56 Outdoor noise filter circuit board PUHZ-FRP71VHA EI, E2 Connect to the earth CNAC1, CNAC2 Connect to 220-240V AC the earth (Connect to the outdoor control- ler circuit board (CNAC)) Primary current (Connect to the outdoor power circuit board (CN5)) CN52C...
Page 57 Outdoor power circuit board Brief Check of DIP-IPM and DIP-PFC PUHZ-FRP71VHA * Usually, they are in a state of being short-circuited if they are broken. Measure the resistance in the following points (connectors, etc.). If they are short-circuited, it means that they are broken.
Page 58: Function Of Switches, Connectors And Jumpers
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 Function Effective timing Switch switch When compressor is working in ATA heating and ATW Forced defrost *1 Start Normal...
Page 59 The black square ( ) indicates a switch position. Action by the switch operation Type of Swich No. Function Effective timing Switch No function — — — Power failure Auto recovery No auto recovery When power supply ON automatic recovery *2 No function —...
Page 60: Special Function
(2) Function of connector Action by open/ short operation Types Function Effective timing Connector Short Open Connector CN31 Start When power supply ON Emergency operation Normal Special function (a) Low-level sound priority mode (Local wiring) By performing the following modif cation, 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 61 <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 62 Indication Error Outdoor controller board Error Detailed Contents Inspection method code reference LED1 (Green) LED2 (Red) page Check if stop valves are open. 3 blinking 1 blinking Abnormality of comp. surface P.31 Check if connectors (TH4, TH32, LEV-A, and LEV-B) on outdoor controller thermistor (TH32) and discharging board are not disconnected.
Page 63 <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 error code by controlling DIP SW2 on ‘A-Control Service Tool’. Operation indicator SW2 : Indicator change of self diagnosis SW2 setting...
Page 64 The black square ( ) indicates a switch position. SW2 setting Display detail Explanation for display Unit Pipe temperature / Outdoor pipe (TH3) -40 – 90 -40 – 90 (When the coil thermistor detects 0: or below, “–” and temperature are displayed by turns.) (Example) When -10:;...
Page 65 The black square ( ) indicates a switch position. SW2 setting Display detail Explanation for display Unit Pipe temperature / Outdoor pipe (TH3) -40 – 90 on error (When the coil thermistor detects 0: or below, “–” occurring and temperature are displayed by turns.) -40 –...
Page 66 The black square ( ) indicates a switch position. SW2 setting Display detail Explanation for display Unit 0 – 2 The number of connected indoor units (The number of connected indoor units are dis- played.) Unit 2 3 4 5 6 Capacity setting display Displayed as an outdoor capacity code.
Page 67 The black square ( ) indicates a switch position. SW2 setting Display detail Explanation for display Unit Indoor setting temperature 17 – 30 17 – 30 °C 2 3 4 5 6 Outdoor pressure sensor saturated -39 – 88 temperature (63HS) (When the temperature is 0: or less, “–”...
Page 68 The black square ( ) indicates a switch position. SW2 setting Display detail Explanation for display Unit 180 – 370 DC bus voltage (When it is 100V or more, hundreds digit, tens 180 – 370 digit and ones digit are displayed by turns.) 2 3 4 5 6 0~100 Capacity save...
Page 69 The black square ( ) indicates a switch position. SW2 setting Display detail Explanation for display Unit 0 – 480 LEV-A opening pulse on error occuring (When it is 100 pulse or more, hundreds digit, tens 0 – 480 digit and ones digit are displayed by turns.) Pulse (Example) When 130 pulse;...
Page 70 The black square ( ) indicates a switch position. SW2 setting Display detail Explanation for display Unit 0 – 999 Thermo-on time until error stops (When it is 100 minutes or more, hundreds digit, tens 0 – 999 digit and ones digit are displayed by turns.) Minute (Example) When 415 minutes;...
Page 71: 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 72 (2) Functions available when setting the unit number to 01-03 or AL (07 in case of wireless remote controller) • When setting functions for an indoor unit in an independent system, set the unit number to 01 referring to 4 setting the indoor unit number of Operating Procedure.
Page 73: Service Menu
11-1-1. Selecting functions using the wired remote controller <PAR-31MAA> <Service menu> Maintenance password is required Select "Service" from the Main menu, and press the button. Main Main menu Maintenance Initial setting *At the main display, the menu buttom and select "Service" to make the Service maintenance setting.
Page 74 <Function setting> Select "Service" from the Main menu, and press the button. Test run Input maintenance info. Function setting Check Self check Select "Function setting" with the F1 or F2 button, and press the button. Set the indoor unit refrigerant addresses and unit numbers with the F1 Function setting Ref.
Page 75 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 position is given. For actual operations, refer to steps Setting number Refrigerant address Unit number...
Page 76 [Operating Procedure] Check the setting items provided by function selection. If settings for a mode are changed by function selection, the functions of that mode will be changed accordingly. Check all the current settings according to steps , fill in the "Check" column in Table 1, and then change them as necessary. For factory settings, refer to the indoor unit's installation manual. Switch off the remote controller.
Page 77 11-1-3. 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] The flow of the function selection procedure is shown below.
Page 78 11-2. FUNCTION SELECTION OF REMOTE CONTROLLER 11-2-1. PAR-31MAA The functions of the function buttons change depending on the screen. Refer to the button function guide that appears at the bottom of the LCD for the functions they serve on a given screen.
Page 79: Initial Setting
<Menu structure of PAR-31MAA> Press the button. MENU Main menu Move the cursor to the desired item with the buttons, and press the button. SELECT Vane · Louver · Vent. (Lossnay) High power Timer On / Off timer Auto-Off timer Weekly timer OU silent mode Restriction...
Page 80 <Main menu list of PAR-31MAA> Setting and display items Setting details Vane · Louver · Vent. Use to set the vane angle. (Lossnay) • Select a desired vane setting from f ve different settings. Use to turn ON / OFF the louver. •...
Page 81 Setting and display items Setting details Initial setting Display Make the settings for the remote controller related items as necessary. details Clock: The factory settings are "Yes" and "24h" format. Temperature: Set either Celsius (°C) or Fahrenheit (°F). Room temp. : Set Show or Hide. Auto mode: Set the Auto mode display or Only Auto display.
Page 82 11-2-2. PAR-21MAA The setting of the following remote controller functions can be changed using the remote controller function selection mode. Change the setting when needed. Item 1 Item 2 Item 3 (Setting content) 1.Change Language Language setting to display • Display in multiple languages is possible. ("CHANGE LANGUAGE") 2.Function limit (1) Operation function limit setting (operation lock) ("LOCKING FUNCTION")
Page 83 [Function selection flowchart] Normal display (Display when the air conditioner is not running) Setting language (English) Hold down the button and press the button for 2 seconds. Hold down the button and press the button for 2 seconds. Press the operation mode button. Press theTIMER MENU button.
Page 84: 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-31MAA Details on the operation data including each thermistor temperature and error history can be conf rmed with the remote controller. Select "Service" from the Main menu, and press the button.
Page 85 12-1-2. PAR-21MAA • Turn on the [Monitoring the operation data] Example) Request code "004" Discharge temperature 69 Refrigerant address "00" A: Maintenance mode B: Refrigerant address C: Data display area D: Request code display area (1) Press the button for 3 seconds so that [ Maintenance mode] appears on the screen (at TEST (2) Press the button for 3 seconds to switch to [Maintenance monitor].
Page 86 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) Operation state Refer to 12-2-1. Detail Contents in Request Code. – Compressor-Operating current (rms) 0 –...
Page 87 Description Request content Unit Remarks (Display range) Indoor unit-Control state – Refer to 12-2-1.Detail Contents in Request Code. Outdoor unit-Control state – Refer to 12-2-1.Detail Contents in Request Code. Compressor-Frequency control state Refer to 12-2-1.Detail Contents in Request Code. – Outdoor unit-Fan control state Refer to 12-2-1.Detail Contents in Request Code.
Page 88 Description Request content Unit Remarks (Display range) Error history 1 (latest) Displays error history. (" - - " is displayed if no history is present.) Code Error history 2 (second to last) Displays error history. (" - - " is displayed if no history is present.) Code Error history 3 (third to last) Displays error history.
Page 89 Description Request content Unit Remarks (Display range) Indoor-Fan operating time 0 – 9999 1 hour (After filter is reset) Indoor-Total operating time 0 – 9999 10 hours (Fan motor ON time) Indoor fan output value (Sj value) 0 – 255 Fan control data –...
Page 90 12-2-1. Detail Contents in Request Code Example) Request code "004" Discharge temperature 69 Refrigerant address "00" A: Maintenance mode display B: Refrigerant address C: Data display area D: Request code display area [Operation state] (Request code :" 0") Relay output state Power currently Data display Display...
Page 91 [Fan control state] (Request code :" 53 ") 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") Data display Actuator output state Actuator output state...
Page 92 [Contact demand capacity] (Request code : " 61") Setting content Data display Display Setting value Setting content 100% [External input state] (Request code : "62") Input state : Input present Data display Contact demand Silent mode Spare 1 Spare 2 Display Input state input...
Page 93 [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 94 [Indoor unit – Model setting information] (Request code : "162" ) Data display Display Model setting state Display Model setting state PSA-RP•GA, PSH-PGAH PKA-RP•FAL(2), PKH-P•FALH See the table on the right. PEAD-RP•EA(2)/GA, PEHD-P•EAH PCA-RP·GA(2), PCH-P•GAH, PLA-RP·BA, PLA-RP71-100BA2 SEZ-KA•VA SLZ-KA•VA(L) PCA-RP•KA PCA-RP•HA PEA-RP400/500GA PEA-RP200/250GA...
Page 95: Easy Maintenance Function
EASY MAINTENANCE FUNCTION 13-1. SMOOTH MAINTENANCE 13-1-1. PAR-31MAA 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. Select "Service"...
Page 96 ● Reduces maintenance work drastically. ● Enables you to check operation data of the indoor and outdoor units by remote controller. Furthermore, use of maintenance stable-operation control that fixes the operating frequency, allows smooth inspection, even for inverter models. Smooth Mainte- Discharge temperature 64 ●...
Page 97 ● Data measurement When the operation is stabilized, measure operation data as explained below. (4) Press the [TEMP] buttons ( ) to select the desired refrigerant address. [Screen (5) Select the type of data to be displayed. After selecting, go to step (6). Compressor information button MENU...
Page 98 13-3. GUIDE FOR OPERATION CONDITION Check Points Inspection item Result Breaker Good Retightened Enter the temperature differences between into Terminal block Outdoor Unit Good Retightened the graph given below. Indoor Unit Good Retightened Operation state is determined according to the plotted areas on (Insulation resistance) the graph.
Page 99: Disassembly Procedure
DISASSEMBLY PROCEDURE PUHZ-FRP71VHA OPERATING PROCEDURE PHOTOS & ILLUSTRATION 1. Removing the service panel and top panel Top panel fixing screws Photo 1 (1) Remove the service panel fixing screws (3 for front, 5 × 12) Top panel and slide the hook on the right downward to remove the service panel.
Page 100: Operating Procedure
OPERATING PROCEDURE PHOTOS 4. Removing the thermistor <Outdoor 2-phase pipe> (TH6) Photo 5 Thermistor (1) Remove the service panel. (See Photo 1) <Outdoor 2-phase pipe> Electrical parts box (2) Remove the top panel. (See Photo 1) (TH6) Controller (3) Disconnect the connector TH7/6 (red) on the controller circuit board circuit board in the electrical parts box.
Page 101 OPERATING PROCEDURE PHOTOS 7. Removing the 4-way valve coil (21S4), LEV coil (LEV(A), Photo 8 LEV(B), LEV(C)) and solenoid valve coil (SV1, SV2, SV3) 4-way valve coil 4-way valve (1) Remove the service panel. (See Photo 1) fixing screw (2) Remove the top panel. (See Photo 1) (3) Remove the electrical parts box.
Page 102 OPERATING PROCEDURE PHOTOS Photo 10 11. Removing the high pressure switch (63H) (1) Remove the service panel. (See Photo 1) Lead wire of high Lead wire of high (2) Remove the top panel. (See Photo 1) pressure switch pressure sensor (3) Remove the electrical parts box.
Page 103 OPERATING PROCEDURE PHOTOS 14. Removing the compressor (MC) Photo 12 (1) Remove the service panel. (See Photo 1) Valve bed (2) Remove the top panel. (See Photo 1) (3) Remove the cover panel (front) fixing screws (2 for front, 5 ×...
Page 104 HEAD OFFICE : TOKYO BLDG., 2-7-3, MARUNOUCHI, CHIYODA-KU, TOKYO 100-8310, JAPAN New publication, effective Aug. 2013 CCopyright 2013 MITSUBISHI ELECTRIC CORPORATION Specifications are subject to change without notice. Distributed in Aug. 2013 No.OCH544 Made in Japan...

Mitsubishi Electric PUHZ-FRP71VHA Service Manual

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