Mitsubishi Electric PUHZ-P200YHA Service Manual
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Mitsubishi Electric PUHZ-P200YHA Service Manual

Split-type, heat pump air conditioners
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See also: Service Manual , Technical Data Book
SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS

SERVICE MANUAL

R410A
Outdoor unit
[model names]
PUHZ-P200YHA
PUHZ-P250YHA
PUHZ-P200YHA3
PUHZ-P250YHA3
[Service Ref.]
PUHZ-P200YHA
PUHZ-P250YHA
PUHZ-P200YHA3
PUHZ-P250YHA3
PUHZ-P200YHA
PUHZ-P250YHA
PUHZ-P200YHA3
PUHZ-P250YHA3
REVISED EDITION-A
Revision:
• PUHZ-P200/250YHA3
• Some descriptions have
• Please void OCH424.
Note:
• This manual describes only
• RoHS compliant products
CONTENTS
1. TECHNICAL CHANGES ................................. 2
2. REFERENCE MANUAL .................................. 2
3. SAFETY PRECAUTION .................................. 3
4. FEATURES ...................................................... 6
5. SPECIFICATIONS ........................................... 7
6. DATA ............................................................... 8
7. OUTLINES AND DIMENSIONS .................... 10
8. WIRING DIAGRAM ....................................... 11
9. WIRING SPECIFICATIONS .......................... 12
11. TROUBLESHOOTING ................................... 19
12. FUNCTION SETTING .................................... 69
15. DISASSEMBLY PROCEDURE ..................... 89
PARTS CATALOG (OCB424)
February 2009
No.OCH424
are added in REVISED
EITION-A.
been modified.
service data of the outdoor
units.
have <G> mark on the
spec name plate.

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Summary of Contents for Mitsubishi Electric PUHZ-P200YHA

  • Page 1: Table Of Contents

    No.OCH424 REVISED EDITION-A SERVICE MANUAL R410A Outdoor unit Revision: [Service Ref.] [model names] • PUHZ-P200/250YHA3 are added in REVISED EITION-A. PUHZ-P200YHA PUHZ-P200YHA • Some descriptions have been modified. PUHZ-P250YHA PUHZ-P250YHA • Please void OCH424. PUHZ-P200YHA3 PUHZ-P200YHA3 Note: PUHZ-P250YHA3 • This manual describes only...

  • Page 2: Technical Changes

    TECHNICAL CHANGES PUHZ-P200YHA PUHZ-P200YHA3 PUHZ-P250YHA PUHZ-P200YHA3 • OUTDOOR CONTROLLER BOARD (C.B.) has been changed. (S/W has been changed: Corresponding to the additional combination between PKA-RP HAL/KAL, PCA-RP KA and PEAD-RP•JA(L)) • • REFERENCE MANUAL INDOOR UNIT’S SERVICE MANUAL Service Model name Service Ref.

  • Page 3: Safety Precaution

    SAFETY PRECAUTION 3-1. ALWAYS OBSERVE FOR SAFETY Before obtaining access to terminal, all supply circuits must be disconnected. 3-2. CAUTIONS RELATED TO NEW REFRIGERANT Cautions for units utilizing refrigerant R410A Use new refrigerant pipes. Do not use refrigerant other than R410A. In case of using the existing pipes for R22, be careful with If other refrigerant (R22 etc.) is used, chlorine in refrige- the followings.
  • 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) When performing service, install a filter drier simultaneously. Be sure to use a filter drier for new refrigerant.
  • Page 5 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 time higher than that of R22, their sizes of flared sections and flare nuts are different.

  • Page 6: Features

    FEATURES PUHZ-P200YHA PUHZ-P250YHA PUHZ-P200YHA3 PUHZ-P250YHA3 CHARGELESS SYSTEM PRE-CHARGED REFRIGERANT IS SUPPLIED FOR PIPING LENGTH AT SHIPMENT. (Max.30m) The refrigerant circuit with LEV (Linear Expansion Valve) and Accumulator always control the optimal refrigerant level regardless of the length (30m max. and 5m min.) of piping. The additional refrigerant charging work during installation often causes problems.

  • Page 7: Specifications

    SPECIFICATIONS PUHZ-P200YHA PUHZ-P250YHA Service Ref. PUHZ-P200YHA3 PUHZ-P250YHA3 Mode Cooling Heating Cooling Heating 3 phase 50Hz, 400V Power supply (phase, cycle, voltage) 9.47 9.88 11.0 12.0 Running current Max. current External finish Munsell 3Y 7.8/1.1 Refrigerant control Linear Expansion Valve Compressor...

  • Page 8: Data

    DATA 6-1. REFILLING REFRIGERANT CHARGE (R410A : kg) Piping length (one way) Factory Service Ref. charged PUHZ-P200YHA PUHZ-P200YHA3 PUHZ-P250YHA 10.7 11.9 PUHZ-P250YHA3 For pipe longer than 30m, addi- tional charge is required. 6-2. COMPRESSOR TECHNICAL DATA (at 20°C) Unit PUHZ-P200, 250YHA...

  • Page 9: Standard Operation Data

    8.44 8.47 Indoor unit PEA-RP250GA PEA-RP200GA 3, 50 Phase , Hz 3, 50 Voltage 1.00 1.18 Input Current 2.00 2.30 PUHZ-P200YHA PUHZ-P250YHA Outdoor unit PUHZ-P200YHA3 PUHZ-P250YHA3 Phase , Hz 3, 50 3, 50 Voltage Current 9.47 9.88 11.0 12.0 2.96 2.59...

  • Page 10: Outlines And Dimensions

    OUTLINES AND DIMENSIONS PUHZ-P200YHA Unit : mm PUHZ-P250YHA PUHZ-P200YHA3 PUHZ-P250YHA3...

  • Page 11: Wiring Diagram

    WIRING DIAGRAM PUHZ-P200YHA PUHZ-P250YHA PUHZ-P200YHA3 PUHZ-P250YHA3 [LEGEND] SYMBOL NAME SYMBOL NAME SYMBOL NAME Terminal Block<Power Supply> TB-L1/L2/L3 Connection Terminal<L1/L2/L3-Power supply> Switch<Pump Down> Terminal Block<Indoor/Outdoor> TB-P1 Connection Terminal CN31 Connector<Emergency Operation> Motor for Compressor TB-P2 Connection Terminal LED1,LED2 LED<Operation Inspection Indicators>...

  • Page 12: Wiring Specifications

    WIRING SPECIFICATIONS 9-1. FIELD ELECTRICAL WIRING (power wiring specifications) P200, P250 Outdoor unit model P200, 250 Outdoor unit Phase 3N~(3ph 4-wires), 50 Hz, Power supply Frequency & Voltage 400 V Outdoor unit input capacity 32 A Main switch (Breaker) Outdoor unit power supply Min.
  • Page 13 1:1 System (Indoor : PEA-200, 250) 1:2 System (Indoor : PEA-400, 500) Outdoor Indoor Outdoor Indoor unit unit unit No.1 unit Unit Unit Unit Unit power power power power supply supply supply supply Indoor/outdoor Indoor/outdoor unit connection unit connection cable cable Earth leakage breaker Remote...

  • Page 14: Power Supply

    9-3. INDOOR – OUTDOOR CONNECTING CABLE WIRING SPECIFICATIONS FOR 220-240 V 50 Hz (INDOOR-OUTDOOR CONNECTING CABLE) Cross section of cable Wire size (mm Number of wires Polarity L (m)*6 Round Clockwise : S1-S2-S3 (30) * Pay attention to stripe of yellow and green. Flat Not applicable Not applicable...
  • Page 15 9-4. M-NET WIRING METHOD (Points to notice) (1) Outside the unit, transmission wires should stay away from electric wires in order to prevent electromagnetic noise from making an influence on the signal communication. Place them at intervals of more than 5cm. Do not put them in the same conduit tube.
  • Page 16 M-NET wiring (1) Use 2-core x 1.25mm² shield wire for electric wires. M-NET terminal (Excluding the case connecting to system controller.) Earth block wire (2) Connect the wire to the M-NET terminal block. Connect one core of the transmission wire (non-polar) to M1 terminal and the other to M2. Peel the M1 M2 shield wire, twist the shield part to a string and connect it to S terminal.

  • Page 17: Refrigerant System Diagram

    REFRIGERANT SYSTEM DIAGRAM PUHZ-P200YHA PUHZ-P250YHA PUHZ-P200YHA3 PUHZ-P250YHA3 Refrigerant flow in cooling Refrigerant flow in heating Outdoor heat exchanger Service Service Ball valve port port Thermistor (check) (check) (TH7) Refrigerant GAS pipe Thermistor (TH6) 25.4( 1 inch) Strainer High pressure 4-way valve...
  • Page 18 1. Refrigerant recovering (pump down) Perform the following procedures to recover refrigerant when moving the indoor unit or the outdoor unit. 1Turn on the power supply (circuit breaker). wWhen power is supplied, make sure that “CENTRALLY CONTROLLED” is not displayed on the remote controller. If “CENTRALLY CONTROLLED”...

  • Page 19: Troubleshooting

    TROUBLESHOOTING 11-1. 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 20 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 altemately. Wait until “PLEASE WAIT” disappears before using remote controller. 1. Turn on the main power supply. “PLEASE WAIT”...
  • Page 21 Test run [for wireless remote controller] Measure an impedance between the power supply terminal block on the outdoor unit and ground with a 500V Megger and check that it is equal to or greater than 1.0M". TEST RUN 1 Turn on the main power to the unit. TEST RUN 2 Press the button twice continuously.

  • Page 22: How To Proceed "Self-Diagnosis

    11-3. HOW TO PROCEED "SELF-DIAGNOSIS" 11-3-1. When a Problem Occurs During Operation 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 23: Remote Controller Diagnosis

    Press the button twice within 3 seconds. The self-diagnosis When the error history is reset, the display will look like the one shown below. ON/OFF However, if you fail to reset the error history, the error content will be displayed address or refrigerant address will blink.
  • Page 24 11-3-4. Malfunction-diagnosis method by 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 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 sec. 0.5 sec. 0.5 sec. 0.5 sec.

  • Page 26: Self-Diagnosis Action Table

    11-4. SELF-DIAGNOSIS ACTION TABLE <Abnormalities detected when the power is turned on> (Note 1) Refer to indoor unit section for code P and code E. (P.32, 33) Abnormal point and detection method Judgment and action Error Code Case 1 No voltage is supplied to terminal 1 Check following items.
  • Page 27 Error Code Abnormal point and detection method Case Judgment and action 1 Contact failure or miswiring of 1 Check disconnection or looseness or polar- Indoor/outdoor unit connector ity of indoor/outdoor unit connecting wire of indoor/outdoor unit connecting miswiring, excessive number of units indoor and outdoor units.
  • Page 28 <Abnormalities detected while unit is operating> Abnormal point and detection method Judgment and action Error Code Case 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 worked) 3 Decreased airflow caused by Abnormal if high-pressure switch 63H...
  • Page 29 Abnormal point and detection method Case Judgment and action Error Code Open/short of outdoor unit thermistors 1 Disconnection or contact failure 1 Check connection of connector (TH3,TH7/6) on (TH3, TH6, TH7, and TH8) of connectors the outdoor controller circuit board. Outdoor controller circuit Abnormal if open or short is detected Check breaking of the lead wire for thermistor...
  • Page 30 Abnormal point and detection method Case Judgment and action Error Code 1 Decrease of power supply voltage Abnormality such as overvoltage or 1 Check the facility of power supply. 2 Disconnection of compressor 2 Correct the wiring (U·V·W phase) to compressor. voltage shortage and abnormal wiring synchronous signal to main circuit...
  • Page 31 Abnormal point and detection method Judgment and action Error Code Case 1 Stop valve of outdoor unit is 1 Open stop valve. Compressor overcurrent interruption Abnormal if overcurrent DC bus or com- closed. 2 Decrease of power supply volt- 2 Check facility of power supply. pressor is detected after compressor starts operating for 30 seconds.
  • Page 32 Abnormal point and detection method Judgment and action Error Code Case Remote controller transmission error 1 2 remote controllers are set as (E3)/signal receiving error (E5) 1 Set a remote controller to main, and the 1 Abnormal if remote controller could not “main.”...
  • Page 33 Abnormal point and detection method Judgment and action Error Code Case 1 Slight temperature difference Pipe temperature 1~4 Check pipe <liquid or condenser/evapora- <Cooling mode> between indoor room tor> temperature with room temperature Detected as abnormal when the pipe tem- temperature and pipe <liquid display on remote controller and outdoor perature is not in the cooling range 3 min-...
  • Page 34 Error Code Abnormal point and detection method Case Judgment and action 1 Data of transmission proces- Communication error with communica- Turn off the power supply of outdoor unit, tion processor sor or unit processor is not indoor unit and FRESH MASTER or LOSSNAY Defective communication between unit at the same time for 2 minutes or more, and transmitted normally because...
  • Page 35 From the previous page Error Code Abnormal point and detection method Case Judgment and action 1 During group operation with Same as mentioned in “A7” of the previous 4. If displayed address or attribute is indoor unit of multi- refrigerant remote controller, indoor unit detects page system, if indoor unit transmit...

  • Page 36: Troubleshooting By Inferior Phenomena

    Error Code Abnormal point and detection method Case Judgment and action 1 Transmitting condition is 1 Check transmission waveform or noise on M-NET NO RESPONSE repeated fault because of Abnormal if a message was transmitted transmission wire. noise and the like. 2 Turn off the power supply of outdoor unit and there were reply (ACK) that message 2 Extension of transmission wire...
  • Page 37 Phenomena Factor Countermeasure 1The pair number settings of the wireless remote 4. Even controlled by the wireless 1Check the pair number settings. remote controller, no beep is heard controller and indoor controller board are and the unit does not start operat- mismatched.
  • Page 38 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 39: Symptoms: Nothing Is Displayed On The Remote Controller

    LED display of the indoor controller board LED1 : Symptoms: Nothing is displayed on the remote controller 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 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 41 LED display of the indoor controller board LED1 : Symptoms: Nothing is displayed on the remote controller LED2 : LED3 : — Inspection method and Diagnosis flow Cause troubleshooting Check the voltage of the terminal block (TB6) of the remote controller. •...
  • Page 42 • Before repair Frequent calling from customers Phone Calls From Customers How to Respond Note Unit does The operating display of Check if power is supplied to air conditioner. not operate remote controller does not Nothing appears on the display unless power is at all.
  • Page 43 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 44 Phone Calls From Customers How to Respond Note However, this control is 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 also applied to the models with the heated-up air conditioner.
  • Page 45 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 46 11-6. HOW TO CHECK THE PARTS PUHZ-P200YHA PUHZ-P250YHA PUHZ-P200YHA3 PUHZ-P250YHA3 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) <Discharge> Normal Abnormal Thermistor (TH6) <Outdoor 2-phase pipe>...
  • Page 47 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. Give attention to the service. · Do not pull out the connector (CNF1, 2) for the motor with the power supply on. (It causes trouble of the outdoor controller circuit board and fan motor.) Self check...
  • Page 48 11-7. 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( 273+t – 273 )} 15k' 4.3k' 9.6k'...

  • Page 49: 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 indoor controller board and the linear expansion valve>...
  • Page 50 (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 Stopper Coil Lead wire <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 51: Emergency Operation

    11-8. EMERGENCY OPERATION (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) to ON and short-circuiting the connector (CN31) on outdoor controller board.
  • Page 52 (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 20.5 — Room temperature (TH1) —...

  • Page 53: Test Point Diagram Outdoor Controller Circuit Board

    11-9. TEST POINT DIAGRAM <CAUTION> TEST POINT1 is high voltage. Outdoor controller circuit board PUHZ-P200YHA PUHZ-P250YHA PUHZ-P200YHA3 PUHZ-P250YHA3 Forced defrost, detect history record reset, Demand control setting refrigerant address CN51 External signal output Model select • Compressor operating signal • Abnormal signal...
  • Page 54 Outdoor noise filter circuit board PUHZ-P200YHA PUHZ-P250YHA PUHZ-P200YHA3 PUHZ-P250YHA3 LI1, LI2, LI3, NI POWER SUPPLY LI1-LI2/LI-LI3/LI3-LI1 : AC380/400/415V input LI1-NI/LI2-NI/LI3-NI : AC220/230/240V input (Connect to the terminal block (TB1)) Connect to the earth CNAC1, CNAC2 AC220/230/240V (Connect to the outdoor controller...
  • Page 55 W Usually, they are in a state of being short-circuited if they are broken. Outdoor power circuit board Measure the resistance in the following points (connectors, etc.). PUHZ-P200YHA PUHZ-P250YHA If they are short-circuited, it means that they are broken. 1. Check of POWER MODULE PUHZ-P200YHA3 PUHZ-P250YHA3 1.Check of DIODE circuit...

  • Page 56: Function Of Switches, Connectors And Jumpers

    11-10. FUNCTION OF SWITCHES, CONNECTORS AND JUMPERS (1) Function of switches Type Action by the switch operation Function Effective timing Switch switch When compressor is working Forced defrost 1 Start Normal in heating operation. Abnormal history clear Clear Normal off or operating 1 2 3 4 5 6 1 2 3 4 5 6...
  • Page 57 (2) Function of connectors and switches Action by open/short operation Connector Types Function Effective timing Switch Short Open Start Connector CN31 When power supply ON Emergency operation Normal SW6-1 SW6-2 SW6-3 MODEL SW5-6 SW6-4 200Y Model select 1 2 3 4 5 6 7 8 1 2 3 4 5 6 SW6-5 SW5-6...
  • Page 58 <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 59 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 discharging P.28 Check if connectors (TH4, LEV-A) on outdoor controller board are not temperature (TH4) disconnected.
  • Page 60 <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 61 SW2 setting Display detail Explanation for display Unit Pipe temperature/Liquid(TH3) – 40~90 – 40~90 (When the coil thermistor detects 0: or below, “–” and temperature are displayed by turns.) (Example) When -10:; 2 3 4 5 6 0.5 secs. 0.5secs. 2 secs.
  • Page 62 SW2 setting Display detail Explanation for display Unit Pipe temperature/Liquid (TH3) on error – 40~90 occurring (When the coil thermistor detects 0: or below, “–” – 40~90 and temperature are displayed by turns.) (Example) When –15:; 0.5 secs. 0.5secs. 2 secs. 2 3 4 5 6 Compressor temperature (TH4) or 3~217...
  • Page 63 SW2 setting Display detail Explanation for display Unit 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. Capacity Code Code P200 display...
  • Page 64 SW2 setting Display detail Explanation for display Unit Indoor setting temperature 17~30 17~30 2 3 4 5 6 Outdoor pipe temperature/Cond./Eva. -39~88 (TH6) (When the temperature is 0: or less, “–” and -39~88 temperature are displayed by turns.) 2 3 4 5 6 Outdoor outside temperature (TH7) -39~88 -39~88...
  • Page 65 SW2 setting Display detail Explanation for display Unit 0~225 Capacity save (When the capacity is 100% hundreds digit, tens digit 0~225 and ones digit are displayed by turns.) When air conditioner is connected to (Example) When 100%; M-NET and capacity save mode is 0.5 secs.
  • Page 66 SW2 setting Display detail Explanation for display Unit 0~480 LEV-A opening pulse on error occurring (When it is 100 pulse or more, hundreds digit, tens 0~480 digit and ones digit are displayed by turns.) (Example) When 130 pulse; Pulse 0.5 secs. 0.5secs.
  • Page 67 SW2 setting Display detail Explanation for display Unit 0~255 Discharge superheat on error occurring (When the temperature is 100°C or more, hundreds digit, tens digit and ones digit are displayed by 0~255 turns.) (Example) When 150°C; Cooling = TH4-TH6 0.5 secs. 0.5secs.
  • Page 68 SW2 setting Display detail Explanation for display Unit Controlling status of compressor The following code will be a help to know the operating frequency operating status of unit. • The tens digit Display Compressor operating frequency control Primary current control Secondary current control •...

  • Page 69: Function Setting

    FUNCTION SETTING 12-1. UNIT FUNCTION SETTING BY THE REMOTE CONTROLLER Each function can be set according to necessity 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. (1) Functions available when setting the unit number to 00 (Select 00 referring to 4 set the indoor unit number.) W1 The functions below are available only when the wired remote controller is used.
  • Page 70 (2) Functions available when setting the unit number to 01-04 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 unit number of Operating Procedure.
  • Page 71 12-1-1. Selecting functions using the wired remote controller 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 72 [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, then change them as necessary. For initial settings, refer to the indoor unit's installation manual. Switch off the remote controller.
  • Page 73 12-1-2. 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] The flow of the function selection procedure is shown below.
  • Page 74 12-2. FUNCTION SELECTION OF REMOTE CONTROLLER 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 •...
  • Page 75 [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 76: Monitoring The Operation Data By The Remote Controller

    MONITORING THE OPERATION DATA BY THE REMOTE CONTROLLER 13-1. HOW TO "MONITOR THE OPERATION DATA" • Turning 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...
  • Page 77 13-2. 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 13-2-1. Detail Contents in Request Code. – Compressor-Operating current (rms) 0 –...
  • Page 78 Description Request content Unit Remarks (Display range) Indoor unit-Control state – Refer to 13-2-1.Detail Contents in Request Code. Outdoor unit-Control state – Refer to 13-2-1.Detail Contents in Request Code. Compressor-Frequency control state Refer to 13-2-1.Detail Contents in Request Code. – Outdoor unit-Fan control state Refer to 13-2-1.Detail Contents in Request Code.
  • Page 79 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 80 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 81 13-2-1. 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 82 [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 83 [Contact demand capacity] (Request code "61") Setting content Data display Setting Display Setting value Setting content SW7-1 SW7-2 100% [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 84 [Outdoor unit switch setting display (SW1 to SW10, except SW3)] Request codes: 73 to 82 0: Swich OFF 1: Swich ON 0: Swich OFF 1: Swich ON SW1, SW2, SW6, SW7 Data display Data display 00 00 00 00 00 01 00 01 00 02 00 02...
  • Page 85 [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-RP71/100/125BA2 SEZ-KA·VA SLZ-KA·VA(L) PCA-RP·HA PCA-RP·KA PEA-RP400/500GA PKA-RP·GAL, PKH-P·GALH PEA-RP200/250GA...

  • Page 86: Easy Maintenance Function

    EASY MAINTENANCE FUNCTION 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 Conventional inspection work...
  • Page 87 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 88 14-2. GUIDE FOR OPERATION CONDITION Inspection item Result Check Points 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 89: Disassembly Procedure

    DISASSEMBLY PROCEDURE PUHZ-P200YHA PUHZ-P250YHA PUHZ-P200YHA3 PUHZ-P250YHA3 OPERATING PROCEDURE PHOTOS & ILLUSTRATION Figure 1 1. Removing the service panel and top panel Top panel fixing screws Top panel (1) Remove 3 service panel fixing screws (5 × 10) and slide the hook on the right downward to remove the service Service panel panel.
  • Page 90 PHOTOS OPERATING PROCEDURE Photo 4 4. Removing the thermistor <Outdoor 2-phase pipe> (TH6) Thermistor (1) Remove the service panel. (See Figure 1.) <Outdoor 2-phase pipe> (TH6) Electrical parts box (2) Remove the top panel. (See Figure 1.) (3) Disconnect the connectors, TH6 and TH7 (red), on the controller circuit board in the electrical parts box.
  • Page 91 OPERATING PROCEDURE PHOTOS Photo 7 7. Removing the 4-way valve coil (21S4) and linear expan- 4-way valve coil sion valve coil (LEV(A)) Linear expansion valve High pressure switch (1) Remove the service panel. (See Figure 1.) (2) Remove the top panel. (See Figure 1.) [Removing the 4-way valve coil] (3) Remove 4-way valve coil fixing screw (M4 ×...
  • Page 92 Compressor fixing nut HEAD OFFICE : TOKYO BLDG., 2-7-3, MARUNOUCHI, CHIYODA-KU, TOKYO 100-8310, JAPAN CCopyright 2007 MITSUBISHI ELECTRIC ENGINEERING CO., LTD. New publication, effective Feb. 2009 Distributed in Feb. 2009 No.OCH424 REVISED EDITION-A PDF 7 Specifications subject to change without notice Distributed in Sep.

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