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Mitsubishi Electric PUHZ-RP3VHA Technical & Service Manual

Split-type, heat pump air conditioners.
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SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS
TECHNICAL & SERVICE MANUAL
R410A
Outdoor unit
[model names]
PUHZ-RP3VHA
PUHZ-RP4VHA
PUHZ-RP5VHA
PUHZ-RP6VHA
[Service Ref.]
PUHZ-RP3VHA
PUHZ-RP4VHA
PUHZ-RP5VHA
PUHZ-RP6VHA
CONTENTS
1. SAFETY PRECAUTION··································3
3. PART NAMES AND FUNCTIONS ··················7
4. SPECIFICATIONS···········································8
5. DATA ·····························································10
6. OUTLINES AND DIMENSIONS····················12
7. WIRING DIAGRAM ·······································14
8. WIRING SPECIFICATIONS ··························16
9. REFRIGERANT SYSTEM DIAGRAM ·············17
10.TROUBLESHOOTING····································21
11. DISASSEMBLY PROCEDURE······················66
12. PARTS LIST ··················································76
13. OPTIONAL PARTS························Back Cover
2003
No.OC294

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   Summary of Contents for Mitsubishi Electric PUHZ-RP3VHA

  • Page 1: Table Of Contents

    SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS 2003 No.OC294 TECHNICAL & SERVICE MANUAL R410A Outdoor unit [model names] [Service Ref.] PUHZ-RP3VHA PUHZ-RP3VHA PUHZ-RP4VHA PUHZ-RP4VHA PUHZ-RP5VHA PUHZ-RP5VHA PUHZ-RP6VHA PUHZ-RP6VHA CONTENTS 1. SAFETY PRECAUTION··································3 2. COMBINATION OF INDOOR AND OUTDOOR UNITS···7 3. PART NAMES AND FUNCTIONS ··················7 4.
  • Page 3: Safety Precaution

    SAFETY PRECAUTION 1-1. 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 Unit Gravimeter [3] Service tools Use the below service tools as exclusive tools for R410A refrigerant. Specifications Gauge manifold ·Only for R410A ·Use the existing fitting specifications . (UNF1/2) ·Use high-tension side pressure of 5.3MPa·G or over. Charge hose ·Only for R410A ·Use pressure performance of 5.09MPa·G or over.
  • Page 5 1-2. Changed point • Precautions when reusing existing R22 refrigerant pipes (1) Flowchart Measure the existing pipe thickness and check for damage. The existing pipe thickness meets speci- The existing pipe thickness does not meet fications and the pipes are not damaged. specifications or the pipes are damaged.
  • 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 time higher than that of R22, their sizes of flared sections and flare nuts are different.
  • Page 7: Combination Of Indoor And Outdoor Units

    PLA-RP OC293 · PLA-RP AA.UK OC297 PART NAMES AND FUNCTIONS PUHZ-RP3VHA PUHZ-RP4VHA PUHZ-RP5VHA PUHZ-RP6VHA CHARGELESS SYSTEM PRE-CHARGED REFRIGERANT IS SUPPLIED FOR PIPING LENGTH AT SHIPMENT. (Max.30m(PUHZ-RP3~RP6)) The refrigerant circuit with LEV(Linear Expansion Valve) and power receiver always control the optimal refrigerant level regardless of the length (30m max.
  • Page 8: Specifications

    SPECIFICATIONS Service Ref. PUHZ-RP3VHA PUHZ-RP4VHA Cooling Heating Cooling Heating Function Single, 50Hz, 220-230-240V Power supply (phase, cycle, voltage) 1.81 2.18 2.78 3.14 Input Running current 8.04 9.74 12.33 13.94 External finish Munsell 3Y 7.8/1.1 Refrigerant control Linear Expansion Valve Compressor...
  • Page 9 PUHZ-RP5VHA PUHZ-RP6VHA Service Ref. Cooling Heating Cooling Heating Function Single, 50Hz, 220-230-240V Power supply (phase, cycle, voltage) 3.56 3.94 4.66 4.58 Input 15.80 17.50 20.73 20.37 Running current External finish Munsell 3Y 7.8/1.1 Refrigerant control Linear Expansion Valve Compressor Hermetic Model ANV33FDAMT Motor output...
  • Page 10: Data

    DATA 5-1. REFILLING REFRIGERANT CHARGE (R410A : kg) Piping length (one way) Factory Service Ref. charged PUHZ-RP3VHA — — PUHZ-RP4VHA PUHZ-RP5VHA PUHZ-RP6VHA Longer pipe than this line, additional charge is required. 5-2. COMPRESSOR TECHNICAL DATA (at 20°C) PUHZ-RP3VHA Unit PUHZ-RP4,5,6VHA...
  • Page 11: Noise Criterion Curves

    5-3. NOISE CRITERION CURVES MICROPHONE UNIT 1.5m GROUND PUHZ-RP3VHA PUHZ-RP4VHA SPL(dB) SPL(dB) MODE LINE MODE LINE COOLING COOLING HEATING HEATING NC-70 NC-70 NC-60 NC-60 NC-50 NC-50 NC-40 NC-40 NC-30 NC-30 APPROXIMATE APPROXIMATE THRESHOLD OF THRESHOLD OF HEARING FOR HEARING FOR...
  • Page 12: Outlines And Dimensions

    OUTLINES AND DIMENSIONS PUHZ-RP3VHA Unit : mm...
  • Page 13 PUHZ-RP4VHA Unit : mm PUHZ-RP5VHA PUHZ-RP6VHA...
  • Page 14: Wiring Diagram

    WIRING DIAGRAM PUHZ-RP3VHA...
  • Page 15 PUHZ-RP4VHA PUHZ-RP5VHA PUHZ-RP6VHA...
  • Page 16: Wiring Specifications

    WIRING SPECIFICATIONS WIRING SPECIFICATIONS FOR 220~240V 50Hz (INDOOR-OUTDOOR CONNECTING CABLE) Wire size L(m) Cross section Number Polarity of cable of wires Round Clockwise : S1-S2-S3 (50) w Pay attention to stripe of yellow and green Flat Not applicable applicable (Because center wire has no cover finish) Flat (45) From left to right : S1-Open-S2-S3...
  • Page 17: Refrigerant System Diagram

    REFRIGERANT SYSTEM DIAGRAM PUHZ-RP3VHA Thermistor TH7 Heat exchanger (Outdoor outside temperature) Thermistor TH6 Ball valve 4-way valve Strainer(#50) (Outdoor condenser/evaporator Refrigerant GAS pipe temperature) connection(5/8F) Service port Thermistor TH3 (High pressure) (Outdoor liquid pipe temperature) Oil separator Service port (Low pressure)
  • Page 18 Applicable extension pipe for each model (1) 1:1 system (a) Pipe length <Table 1> Pipe length for 1:1 system Liquid [6.35 [9.52 [12.7 pipe Thick- t0.8 t0.8 t0.8 (mm) ness [9.52 [12.7 [15.88 [12.7 [15.88 [19.05 [15.88 [19.05 pipe Thick- t0.8 t0.8 t1.0...
  • Page 19 (C) Capacity correction Cooling and heating capacity is lowered according to pipe length. Capacity can be obtained by referring to the capacity curves below. When the diameter of gas pipe is one size smaller than standard diameter, cooling capacity is lowered com- paring to the standard diameter.
  • Page 20 1. Refrigerant collecting (pump down) Perform the following procedures to collect the refrigerant when moving the indoor unit or the outdoor unit. 1Before collecting the refrigerant, first make sure that the all of the SW5 DIP switches for function changes on the control board of the outdoor unit are set to OFF.
  • Page 21: 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 inferior phenomenon is reoccurring at service, are sum- marized in the table below.
  • Page 22 10-2. Check point under test run (MA remote controller) (1) Before test run • After installation of indoor and outdoor units, piping work and electric wiring work, re-check that there is no refrigerant leak- age, loosened connections and incorrect polarity. •...
  • Page 23 wPress the remote controller’s CHECK button twice to perform self-diagnosis. See the table below for the contents of LCD display. Contents of inferior phenomena Contents of inferior phenomena Abnormality of room temperature thermistor Malfunction outdoor unit U1~UP Abnormality of pipe temperature thermistor/Liquid F3~F9 Malfunction outdoor unit Abnormality of drain sensor...
  • Page 24 10-3. Malfunction-diagnosis method by remote controller 10-3-1. Error history of unit (1) Wired remote controller <In case of trouble during operation> Setting number If there is a trouble on air conditioner, both indoor unit and out- Refrigerant address Mode number door unit will stop and digital display shows what was wrong.
  • Page 25 4 To cancel self-diagnosis There are following two methods to cancel self-diagnosis: Press the H “CHECK” button twice within three seconds. Self-diagnosis is cancelled and the display screen will return to the status before self-diagnosis. Press the I “ON/OFF” button. Self-diagnosis is cancelled and indoor unit will stop.
  • Page 26 (2) Digital 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 27 10-3-2. Wired Remote controller Diagnosis If operation can not be carried out from remote controller, try remote controller diagnosis with following process. 1 First, check the electricity current marker. When correct voltage (DC12V) is not supplied to remote controller, the electricity current marker is put out. If the electricity current marker is not lighted, check the remote controller wiring and the indoor units.
  • Page 28: Self-diagnosis Action Table

    10-4. SELF-DIAGNOSIS ACTION TABLE <Abnormalities detected when the power is put on> (Note 1) Refer to indoor unit section for code P and code E. Error Code Meaning of error code and detection method Judgment and action Case 1 No voltage is supplied to termi- 1 Check following items.
  • Page 29 Error Code Meaning of error code and detection method Case Judgment and action 1 Check disconnection or looseness or polarity 1 Contact failure or mis-wiring of Indoor/outdoor unit connector mis- indoor/outdoor unit connecting of indoor/outdoor unit connecting wire of wiring, excessive number of units (4 wire indoor and outdoor units.
  • Page 30 <Abnormalities detected while unit is operating> Error Code Meaning of error code and detection method Judgment and action Case Abnormal high pressure (High-pressure 1 Short cycle of indoor unit 1~6Check indoor unit and repair defectives. switch 63H worked) 2 Clogged filter of indoor unit Abnormal if high-pressure switch 63H 3 Decreased airflow caused by worked (more than 4.41 MPa) during com-...
  • Page 31 Error Code Meaning of error code and detection method Judgment and action Case Abnormal temperature of heat sink 1 Outdoor fan is blocked. 12 Check outdoor fan. Abnormal if heat sink thermistor(TH8) 2 Failure of outdoor fan motor Refer to P39. detects temperature indicated below.
  • Page 32 Error Code Meaning of error code and detection method Judgment and action Case 1 Stop valve is closed. 1 Open stop valve. Compressor overcurrent interruption 2 Check facility of power supply. 2 Decrease of power supply volt- (When compressor locked) Abnormal if overcurrent of DC bus or 3 Correct the wiring (U•V•W phase) to com- 3 Looseness, disconnection or...
  • Page 33 Error Code Meaning of error code and detection method Judgment and action Case 1 Indoor/ outdoor unit connecting 1 Check disconnection or looseness of Indoor/outdoor unit communication error (Transmitting error) wire has contact failure. indoor/outdoor unit connecting wire. 2 Defective communication circuit (Outdoor unit) 2~4 Put the power off, and on again to check.
  • Page 34 <M-NET communication error> (Note) “Indoor unit” in the text indicates M-NET p.c. board in outdoor unit. Error Code Meaning of error code and detection method Case Judgment and action 1 There are two or more same Address duplicate definition Search the unit with same address as abnor- This error is displayed when transmission address of controller of out- mality occurred.
  • Page 35 Error Code Meaning of error code and detection method Case Judgment and action NO ACK signal Common factor that has no rela- 1 Shut off the power supply of outdoor unit and tion with abnormality source. 1. Transmitting side controller detects indoor unit and FRESH MASTER or LOSS- 1 The unit of former address abnormal if a massage was transmitted...
  • Page 36 Error Code Meaning of error code and detection method Case Judgment and action 5. If displayed address or attribute is 1 During sequential operation of FRESH MASTER, indoor unit and FRESH MAS- TER of other refrigerant sys- Indoor unit detects abnormality when tem, if indoor unit transmits to indoor unit transmitted to FRESH MAS- FRESH MASTER while out-...
  • Page 37: Troubleshooting By Inferior Phenomena

    10-5. TROUBLESHOOTING BY INFERIOR PHENOMENA Phenomena Factor Countermeasure 1DC12V is not supplied to remote controller. 1Check LED2 on indoor controller board. 1. Remote controller display does not work. (Power supply display is not indicated on LCD.) (1) When LED2 is lit. 2DC12~15V is supplied to remote controller, however, Check the remote controller wiring for breaking or contact failure.
  • Page 38 Phenomena Factor Countermeasure 1Linear expansion valve fault 1• Discharging temperature and indoor 7. Remote controller display works normally and the unit performs Opening cannot be adjusted well due to linear expan- heat exchanger temperature does not heating operation, however, the sion valve fault.
  • Page 39 HOW TO CHECK THE PARTS PUHZ-RP3VHA PUHZ-RP5VHA PUHZ-RP4VHA PUHZ-RP6VHA Parts name Check points Outdoor pipe <liquid> Disconnect the connector then measure the resistance using a tester. temperature (Surrounding temperature 10:~30:) thermistor (TH3) Normal Abnormal Discharge temperature thermistor (TH4) 160k"~410k" Outdoor condenser/ evaporator temperature 4.3k"~9.6k"...
  • Page 40 HOW TO CHECK THE COMPONENTS <Thermistor feature chart> Low temperature thermistors Outdoor pipe <liquid> temperature thermistor (TH3) Outdoor condenser/evaporator temperature thermistor (TH6) Outdoor outside temperature thermistor (TH7) Thermistor R0 = 15k' ± 3% B constant = 3480k' ± 2% =15exp{3480( 273+t – 273 )} 15k' 4.3k' 9.6k'...
  • Page 41: Linear Expansion Valve

    Linear expansion valve 1 1 Operation summary of the linear expansion valve. • Linear expansion valve open/close 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 42 (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 43: Emergency Operation

    10-6. 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 44 10-7. TEST POINT DIAGRAM FAN12 FAN22 • Outdoor controller board (FAN22 is only for RP4-6.) PUHZ-RP3VHA Connect to fan motor PUHZ-RP4VHA (Detection of position) 1 to 5 DC 5V pulse PUHZ-RP5VHA FAN11•FAN21 2 to 5 (Detected while the PUHZ-RP6VHA (FAN21 is only for RP4-6.) 3 to 5 motor is rotating.)
  • Page 45 Outdoor noise filter board PUHZ-RP3VHA Voltage of AC220-240V is input. (Terminal Connect to the earth block) CNAC1,CNAC2 AC220-240V (Controller board) Primary current (Power board) CN52C 52C relay signal (Controller board) Voltage of AC220-240V is output. (ACL)
  • Page 46 Outdoor noise filter board PUHZ-RP4VHA PUHZ-RP5VHA PUHZ-RP6VHA Voltage of AC220-240V is output (Power board) CNAC1, CNAC2 AC220-240V (Controller board) Primary current (Power board) Connect to the earth Voltage of AC220-240V is input (Terminal block)
  • Page 47 Outdoor Power board PUHZ-RP3VHA Connect to the compressor Connect to ACL Voltage among phases: 5V to 180V AC220-240V DC300-380V Connect to controller board (Red) (White) Connect to the earth Connect to the Primary current detection Radiator panel controller board (Connect to the noise filter)
  • Page 48 Outdoor Power board PUHZ-RP4VHA PUHZ-RP5VHA PUHZ-RP6VHA Connect to the controller board 1-5: Power board Transmitting signal to the controller board (0-5V) 2-5: Zero cross signal (0-5V) Connect to the CNAF Radiator panel 3-4: 18V controller board Connect to temperature Detection of primary current 6-5: 15V ACTM thermistor...
  • Page 49: Function Of Switches, Connectors And Jumpers

    10-8. 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 Compulsory defrosting Start Normal in heating operation. w Abnormal history clear Clear Normal off or operating 1 2 3 4 5 6 1 2 3 4 5 6...
  • Page 50 3 phase Capacity settings Always :Short :Open Jumper J4 J5 J6 Model PUHZ-RP3VHA PUHZ-RP4VHA PUHZ-RP5VHA Jumper PUHZ-RP6VHA Special function a) Low-level sound priority mode (Local wiring) Unit enters into Low-level sound priority mode by SW7-1, 2 and external signal input setting.
  • Page 51 <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 abnormali- ty can be indicated in details by connecting an optional part ‘A-Control Service Tool (PAC-SK52ST)’ to connector CNM on out- door controller board.
  • Page 52 Indication Error Outdoor controller board Error Detailed Contents Inspection method reference code LED1 (Green) LED2 (Red) page 1Check if stop valves are open. 3 blinking 1 blinking P.30 Abnormality of shell thermostat 2Check if connectors (TH4, LEV-A, and LEV-B) on outdoor controller board are not and discharging temperature (TH4) disconnected.
  • Page 53: Initial Setting

    <Outdoor unit operation monitor function> [When option 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 control- ling DIP SW2 on ‘A-Control Service Tool’. Operation indicator SW2 : Indicator change of self diagnosis Explanation for display...
  • Page 54 Explanation for display Unit SW2 setting Display detail 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.
  • Page 55 Explanation for display Unit SW2 setting Display detail 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.
  • Page 56 Explanation for display SW2 setting Display detail 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 Capacity Code outdoor capacity code. RP3V Code RP4V...
  • Page 57 Explanation for display Unit SW2 setting Display detail Indoor setting temperature 17~30 17~30 2 3 4 5 6 Outdoor pipe temperature / Cond./ -39~88 Eva. (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...
  • Page 58 Explanation for display Unit SW2 setting Display detail 0~100 Capacity save (When the capacity is 100% hundreds digit, tens digit 0~255 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 59 Explanation for display Unit SW2 setting Display detail 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 60 Explanation for display Unit SW2 setting Display detail 0~255 Discharge super heat 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 Heating = TH4-Th5 0.5 secs.
  • Page 61 10-9. SELECTING FUNCTIONS USING 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. <Table 1>...
  • Page 62: Operating Instructions

    10-9-1. Selecting functions using the wired remote controller [Flow of function selection procedure] The flow of function selection procedure is shown below. The flow is described in case of setting indoor temperature detecting shown in table 1 on the preceding page. Refer to procedure 1 to 0 when actually setting functions. Wired type Selecting functions using the wired remote controller Mode number...
  • Page 63 4 4 Setting the indoor unit number Press C (TIMER SET) button to select the unit Press D(CLOCK ON OFF) and [--] will start to flash in the unit number from 00, 01, 02, 03, 04, and AL. number display (4) . FUNCTION FUNCTION •...
  • Page 64 8 8 Registering the settings from steps 3 3 to 7 7 into memory The mode and setting numbers (1)(2) will start to flash when the MODE button E is pressed and registration will begin. The numbers are set when the flashing stays lit. FUNCTION FUNCTION WIf [---] appears in the room temperature display as the mode/setting number, or if a flashing [88] display appears, a transmis-...
  • Page 65 10-9-2. 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 66: Disassembly Procedure

    DISASSEMBLY PROCEDURE PUHZ-RP3VHA OPERATING PROCEDURE PHOTOS & ILLUSTRATION Top panel fixing screws 1. Removing the service panel and top panel Figure 1 Top panel (1) Remove 3 service panel fixing screws (5 10) and slide the hook on the right downward to remove the service panel.
  • Page 67 OPERATING PROCEDURE PHOTOS 4. Removing the condenser/evaporator temperature Photo 4 Condenser/evaporator thermistor (TH6) temperature thermistor Electrical (1) Remove the service panel. (See figure 1.) (TH6) Controller parts box (2) Remove the top panel. (See figure 1.) board (C.B.) (3) Disconnect the connectors, TH6 and TH7 (red), on the controller board in the electrical parts box.
  • Page 68 OPERATING PROCEDURE PHOTOS 7. Removing the 4-way valve solenoid coil (21S4), Photo 7 linear expansion valve coil (LEV(A), LEV(B)) and bypass valve solenoid coil (SV) Linear expansion Linear expansion (1) Remove the service panel. (See figure 1.) valve coil (LEV B) valve coil (LEV A) (2) Remove the top panel.
  • Page 69 OPERATING PROCEDURE PHOTOS 10. Removing bypass valve Photo 9 (1) Remove the service panel. (See figure 1.) Linear expansion Linear expansion (2) Remove the top panel. (See figure 1.) valve coil (LEV B) valve coil (LEV A) (3) Remove the electrical parts box. (See photo 3.) Linear (4) Remove 3 right side panel fixing screws (5 10) in the...
  • Page 70 OPERATING PROCEDURE PHOTOS 13. Removing the compressor (MC) Photo 12 (1) Remove the service panel. (See figure 1.) (2) Remove the top panel. (See figure 1.) (3) Remove 2 front cover panel fixing screws (5 10) and remove the front cover panel. (See photo 3.) (4) Remove 2 back cover panel fixing screws (5 10) and remove the back cover panel.
  • Page 71 PUHZ-RP4VHA, PUHZ-RP5VHA, PUHZ-RP6VHA OPERATING PROCEDURE PHOTOS & ILLUSTRATION 1. Removing the service panel and top panel Top panel fixing screws Top panel Figure 1 (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 72 OPERATING PROCEDURE PHOTOS 4. Removing the condenser/evaporator temperature Photo 4 Condenser/evaporator thermistor (TH6) Electrical temperature thermistor (1) Remove the service panel. (See figure 1.) parts box (TH6) Controller (2) Remove the top panel. (See figure 1.) board (C.B.) (3) Disconnect the connectors, TH6 and TH7 (red), on the controller board in the electrical parts box.
  • Page 73 OPERATING PROCEDURE PHOTOS 7. Removing the 4-way valve solenoid coil (21S4) and Photo 7 Linear expansion valve coil (LEV A) linear expansion valve coil (LEV(A), LEV(B)) (1) Remove the service panel. (See figure 1.) (2) Remove the top panel. (See figure 1.) <Removing the 4-way valve solenoid coil>...
  • Page 74 OPERATING PROCEDURE PHOTOS 10. Removing bypass valve solenoid coil (SV) and Photo 9 Bypass valve bypass valve solenoid coil (1) Remove the service panel. (See figure 1.) fixing screw (2) Remove the top panel. (See figure 1.) (3) Remove 3 right side panel fixing screws (5 10) in the rear of the unit and remove the right side panel.
  • Page 75 OPERATING PROCEDURE PHOTOS 13. Removing the compressor (MC) Photo 12 (1) Remove the service panel. (See figure 1.) (2) Remove the top panel. (See figure 1.) (3) Remove 2 front cover panel fixing screws (5 10) and Power remove the front cover panel. (See photo 3.) receiver (4) Remove 2 back cover panel fixing screws (5 10) and...
  • Page 76: Parts List

    PARTS LIST STRUCTURAL PARTS PUHZ-RP3VHA ty/set Price Wining Recom- Remarks Part No. Part Name Specification Diagram mended (Drawing No.) Symbol Unit Amount PUHZ-RP3VHA (DG12F536H10) — F.ST SCREW (5 10) R01 E01 662 SIDE PANEL (L) TEW E02 691 FAN GRILLE...
  • Page 77 STRUCTURAL PARTS PUHZ-RP4VHA PUHZ-RP5VHA PUHZ-RP6VHA ty/set Price Wining Recom- Remarks PUHZ-RP Part No. Part Name Specificatio Diagram mended (Drawing No.) Unit Amount Symbol (5 10) — F.ST SCREW (DG12F536H10) R01 E02 662 SIDE PANEL (L) T7W E02 691 FAN GRILLE T7W E02 667 FRONT PANEL —...
  • Page 78 FUNCTIONAL PARTS PUHZ-RP3VHA FUSE...
  • Page 79 Price Wining Recom- Remarks Part No. Part Name Specification Diagram mended (Drawing No.) Symbol PUHZ-RP3VHA Unit Amount R01 E28 221 FAN MOTOR R01 E01 115 PROPELLER FAN R01 E02 097 (BK00B055G07) — ELECTRICAL PARTS BOX T7W E00 242 BYPASS VALVE SOLENOID COIL...
  • Page 80 FUNCTIONAL PARTS PUHZ-RP4VHA PUHZ-RP5VHA PUHZ-RP6VHA FUSE...
  • Page 81 Part numbers that is circled is not shown in the figure. ty/set Price Wining PUHZ-RP Recom- Remarks Part No. Part Name Specification Diagram mended (Drawing No.) Symbol Unit Amount R01 E29 221 FAN MOTOR MF1,2 R01 E01 115 PROPELLER FAN R01 E02 097 R01 E46 408 HEAT EXCHANGER...
  • Page 82: Optional Parts

    Applied models PUHZ-RP3, 4, 5, 6VHA HEAD OFFICE : MITSUBISHI DENKI BLDG., 2-2-3, MARUNOUCHI, CHIYODA-KU TOKYO 100-8310, JAPAN cCopyright 2003 MITSUBISHI ELECTRIC ENGINEERING CO., LTD. New publication, effective Jun. 2003 Distributed in Jun. 2003 No.OC294 PDF Specifications subject to change without notice.

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