Mitsubishi PUHZ-SW75VHA.UK Service Manual
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Mitsubishi PUHZ-SW75VHA.UK Service Manual

Split-type, air to water heat pump
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SPLIT-TYPE, AIR TO WATER HEAT PUMP

SERVICE MANUAL

R410A
Outdoor unit
[Model names]
PUHZ-SW75VHA
PUHZ-SW100VHA
PUHZ-SW100YHA
PUHZ-SW120VHA
PUHZ-SW120YHA
Salt proof model
PUHZ-SW75VHA-BS
PUHZ-SW100VHA-BS
PUHZ-SW100YHA-BS
PUHZ-SW120VHA-BS
PUHZ-SW120YHA-BS
PUHZ-SW75VHA.UK
PUHZ-SW75VHA-BS.UK
[Service ref.]
PUHZ-SW75VHA.UK
PUHZ-SW100VHA.UK
PUHZ-SW100YHA.UK
PUHZ-SW120VHA.UK
PUHZ-SW120YHA.UK
PUHZ-SW75VHA-BS.UK
PUHZ-SW100VHA-BS.UK
PUHZ-SW100YHA-BS.UK
PUHZ-SW120VHA-BS.UK
PUHZ-SW120YHA-BS.UK
REVISED EDITION-A
Revision:
• The function description of
CONTENTS
1. REFERENCE MANUAL .................................. 2
2. SAFETY PRECAUTION .................................. 3
3. FEATURES ...................................................... 7
4. SPECIFICATIONS ........................................... 8
5. DATA ............................................................. 11
6. OUTLINES AND DIMENSIONS .................... 13
7. WIRING DIAGRAM ....................................... 15
8. WIRING SPECIFICATIONS .......................... 18
10. TROUBLESHOOTING ................................... 21
11. DISASSEMBLY PROCEDURE ..................... 65
PARTS CATALOG (OCB533)
October 2012
No.OCH533
SW7-3, 7-4 and 7-5 (Page
52) have been corrected in
REVISED EDITION-A.
• Please void OCH533.
Note:
• This manual describes
only service data of the
outdoor units.

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Summary of Contents for Mitsubishi PUHZ-SW75VHA.UK

  • Page 1: Table Of Contents

    REVISED EDITION-A SERVICE MANUAL R410A Outdoor unit Revision: [Service ref.] [Model names] • The function description of SW7-3, 7-4 and 7-5 (Page PUHZ-SW75VHA PUHZ-SW75VHA.UK 52) have been corrected in REVISED EDITION-A. PUHZ-SW100VHA PUHZ-SW100VHA.UK • Please void OCH533. PUHZ-SW100YHA PUHZ-SW100YHA.UK PUHZ-SW120VHA Note: PUHZ-SW120VHA.UK...

  • Page 2: Reference Manual

    REFERENCE MANUAL INDOOR UNIT SERVICE MANUAL Model name Service ref. Service manual No. EHST20C-VM6HB EHST20C-VM6HB.UK EHST20C-YM9HB EHST20C-YM9HB.UK EHST20C-VM6B EHST20C-VM6B.UK EHST20C-YM9B EHST20C-YM9B.UK EHST20C-VM6EB EHST20C-VM6EB.UK EHST20C-YM9EB EHST20C-YM9EB.UK OCH531 EHST20C-VM6SB EHST20C-VM6SB.UK EHPT20X-VM2HB EHPT20X-VM2HB.UK EHPT20X-VM6HB EHPT20X-VM6HB.UK EHPT20X-YM9HB EHPT20X-YM9HB.UK EHPT20X-VM6B EHPT20X-VM6B.UK EHPT20X-YM9B.UK EHPT20X-YM9B EHSC-VM6B EHSC-VM6B.UK EHSC-YM9B EHSC-YM9B.UK EHSC-VM6EB...

  • Page 3: Safety Precaution

    SAFETY PRECAUTION 2-1. ALWAYS OBSERVE FOR SAFETY Before obtaining access to terminal, all supply circuits must disconnected. Preparation before the repair service. Precautions during the repair service. • Do not perform the work involving the electric parts with wet hands. •...
  • 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: Precautions When Reusing Existing R22 Refrigerant Pipes

    2-3. PRECAUTIONS WHEN REUSING EXISTING R22 REFRIGERANT PIPES Flowchart • Refer to the fl owchart below to determine if the existing pipes can be used and if it is necessary to use a fi lter dryer. • If the diameter of the existing pipes is different from the specifi ed diameter, refer to technological data materials to confi rm if the pipes can be used. Measure the existing pipe thickness and check for damage.
  • Page 6 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-SW100VHA.UK PUHZ-SW75VHA.UK PUHZ-SW100VHA-BS.UK PUHZ-SW75VHA-BS.UK PUHZ-SW100YHA.UK PUHZ-SW100YHA-BS.UK PUHZ-SW120VHA.UK PUHZ-SW120VHA-BS.UK PUHZ-SW120YHA.UK PUHZ-SW120YHA-BS.UK CHARGELESS SYSTEM PRE-CHARGED REFRIGERANT IS SUPPLIED FOR PIPING LENGTH AT SHIPMENT. (Max. 10m (PUHZ-SW75-120)) The refrigerant circuit with LEV (Linear Expansion Valve) and Accumulator always control the optimal refrigerant level regardless of the length (10m max.

  • Page 8: Specifications

    SPECIFICATIONS <Reference data> Plate heat exchanger (ACH70-40 plates) (SW75) (SW120) Nominal water fl ow L/min 22.9 Nominal water fl ow L/min 45.9 Heating Heating Capacity 16.0 Capacity 8.00 (A7/W35) (A7/W35) 4.40 4.10 Power input 3.90 Power input 1.82 Heating Heating Capacity 8.00 Capacity...

  • Page 9: Och533A

    PUHZ-SW75VHA.UK Service Ref. PUHZ-SW75VHA-BS.UK Power supply (phase, cycle, voltage) Single, 50Hz, 230V Max. current External finish Munsell 3Y 7.8/1.1 Linear Expansion Valve Refrigerant control Compressor Hermetic TNB220FLHMT Model Motor output Inverter Starter type Protection devices HP switch Comp. surface thermo...
  • Page 10 PUHZ-SW100YHA.UK PUHZ-SW120YHA Service Ref. PUHZ-SW100YHA-BS.UK PUHZ-SW120YHA-BS.UK Power supply (phase, cycle, voltage) 3 phase, 50Hz, 400V Max. current External finish Munsell 3Y 7.8/1.1 Refrigerant control Linear Expansion Valve Compressor Hermetic Model ANB42FNDMT ANB33FNDMT Motor output Starter type Inverter Protection devices HP switch LP switch Discharge thermo Comp.surface thermo...

  • Page 11: Data

    DATA 5-1. REFILLING REFRIGERANT CHARGE (R410A : kg) Piping length (one way) Initial Service Ref. charged PUHZ-SW75VHA.UK — — — PUHZ-SW75VHA-BS.UK PUHZ-SW100VHA.UK PUHZ-SW100VHA-BS.UK PUHZ-SW100YHA.UK PUHZ-SW100YHA-BS.UK PUHZ-SW120VHA.UK PUHZ-SW120VHA-BS.UK PUHZ-SW120YHA.UK PUHZ-SW120YHA-BS.UK Additional charge is required for pipes longer than 10 m. 5-2. COMPRESSOR TECHNICAL DATA (at 20°C)

  • Page 12: Noise Criterion Curves

    5-3. NOISE CRITERION CURVES PUHZ-SW75VHA.UK SPL(dB) MODE LINE COOLING PUHZ-SW75VHA-BS.UK HEATING MICROPHONE UNIT NC-70 1.5m NC-60 GROUND NC-50 NC-40 NC-30 APPROXIMATE THRESHOLD OF HEARING FOR NC-20 CONTINUOUS NOISE 1000 2000 4000 8000 BAND CENTER FREQUENCIES, Hz PUHZ-SW120VHA.UK PUHZ-SW100VHA.UK PUHZ-SW120VHA-BS.UK PUHZ-SW100VHA-BS.UK...

  • Page 13: Outlines And Dimensions

    OUTLINES AND DIMENSIONS PUHZ-SW75VHA.UK Unit : mm PUHZ-SW75VHA-BS.UK OCH533A...
  • Page 14 PUHZ-SW100VHA.UK Unit : mm PUHZ-SW100VHA-BS.UK PUHZ-SW100YHA.UK PUHZ-SW100YHA-BS.UK PUHZ-SW120VHA.UK PUHZ-SW120VHA-BS.UK PUHZ-SW120YHA.UK PUHZ-SW120YHA-BS.UK OCH533A...

  • Page 15: Wiring Diagram

    WIRING DIAGRAM PUHZ-SW75VHA.UK PUHZ-SW75VHA-BS.UK SYMBOL NAME SYMBOL NAME SYMBOL NAME Terminal Block <Power Supply, Indoor/Outdoor> P. B. Power Circuit Board Switch <Function Switch, Model Select> Motor for Compressor R, S Connection Terminal <L/N-Phase> Switch <Model Select> Fan Motor U, V, W Connection Terminal <U/V/W-Phase>...
  • Page 16 PUHZ-SW100VHA.UK PUHZ-SW120VHA.UK PUHZ-SW100VHA-BS.UK PUHZ-SW120VHA-BS.UK SYMBOL NAME SYMBOL NAME SYMBOL NAME Terminal Block <Power Supply, Indoor/Outdoor> P. B. Power Circuit Board Switch <Function Switch> Motor for Compressor U, V, W Connection Terminal <U/V/W-Phase> Switch <Function Switch> MF1, MF2 Fan Motor Switch <Function Switch> Connection Terminal <L-Phase>...
  • Page 17 PUHZ-SW100YHA.UK PUHZ-SW120YHA.UK PUHZ-SW100YHA-BS.UK PUHZ-SW120YHA-BS.UK SYMBOL NAME SYMBOL NAME SYMBOL NAME Terminal Block <Power Supply> P. B. Power Circuit Board C. B. Controller Circuit Board Terminal Block <Indoor/Outdoor> TB-U/V/W Switch <Manual Defrost, Defect History, Connection Terminal <U/V/W-Phase> Motor for Compressor TB-L1/L2/L3 Connection Terminal <L1/L2/L3-Power Supply>...

  • Page 18: Wiring Specifications

    WIRING SPECIFICATIONS FIELD ELECTRICAL WIRING (power wiring specifications) SW75V SW100V SW120V SW100, 120Y Outdoor unit model ~/N (single), ~/N (single), ~/N (single), 3N~ (3 ph 4-wires), Outdoor unit power supply 50 Hz, 230 V 50 Hz, 230 V 50 Hz, 230 V 50 Hz, 400 V Outdoor unit input capacity Main switch (Breaker) 25 A...

  • Page 19: Refrigerant System Diagram

    Strainer #100 #100 Detail Symbol Part name COMP Compressor DC inverter twin rotary compressor (Mitsubishi Electric Corporation) H/P SW High pressure switch (63H) For protection (OFF:4.15MPa) L/P SW Low pressure switch (63L) For protection (OFF:-0.03MPa) (SW100/120) REV/V Reversing (4-way) valve (21S4)
  • Page 20 9-1. Refrigerant collecting (pump down) Perform the following procedures to collect the refrigerant when moving the indoor unit or the outdoor unit. 1 Supply power (circuit breaker). * When power is supplied, make sure that “CENTRALLY CONTROLLED” is not displayed on the remote controller. If “CEN- TRALLY CONTROLLED”...

  • 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 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. Check the contents below before investigating details.

  • Page 22: Self-Diagnosis Action Table

    10-3. SELF-DIAGNOSIS ACTION TABLE <Abnormalities detected when the power is turned on> Note: Refer to indoor unit section for code P and code E. Abnormal point and detection method Judgment and action Error Code Case 1 No voltage is supplied to terminal 1 Check following items.
  • Page 23 Abnormal point and detection method Case Judgment and action Error Code 1 Disconnection or contact failure 1 Check connection of connector (63H,63L) on 2 connector open (SW100/120 only) Abnormal if both 63H and 63L connector of connector (63H,63L) on outdoor controller circuit board. circuits are open for three minutes outdoor controller circuit board.
  • Page 24 <Abnormalities detected while unit is operating> Abnormal point and detection method Judgment and action Error Code Case 1 Short cycle of indoor unit 1~6Check indoor unit and repair defect. High pressure (High-pressure switch 2 Clogged filter of indoor unit 63H operated) 3 Decreased airflow caused by Abnormal if high-pressure switch 63H operated (...
  • Page 25 Abnormal point and detection method Case Judgment and action Error Code 1 Disconnection or contact failure 1 Check connection of connector (TH3, TH7/6) Open/short of outdoor unit thermistors (TH3, TH6, TH7, and TH8) of connectors on the outdoor controller circuit board. Abnormal if open or short is detected Outdoor controller circuit board: Check connection of connector (CN3) on the...
  • Page 26 Abnormal point and detection method Case Judgment and action Error Code To find out the details about U9 error, turn ON SW2-1, 2-2, 2-3, 2-4, 2-5 and 2-6 when U9 error occurs. Detailed To find out the detail history (latest) about U9 error, turn ON SW2-1, 2-2 and 2-6. codes Refer to 10-8.
  • Page 27 Abnormal point and detection method Judgment and action Error Code Case 1 Abnormal increase in power 12 Check the field facility for the power PFC error (Overvoltage/ Detailed codes Undervoltage/Overcurrent) source voltage supply. 2 Decrease in power source 3 Correct the wiring (U . V . W phase) to •...
  • Page 28 Error Code Abnormal point and detection method Judgment and action Case 1 Open stop valve. 1 Stop valve of outdoor unit is Compressor overcurrent interruption Abnormal if overcurrent DC bus or closed. 2 Check facility of power supply. 2 Decrease of power supply compressor is detected after compressor starts operating for 30 seconds.
  • Page 29 Error Code Abnormal point and detection method Judgment and action Case 1 2 remote controller are set as 1 Set a remote controller to main, and the Remote controller transmission error (E3)/ signal receiving error (E5) “main.” other to sub. 1 Abnormal if remote controller could not (In case of 2 remote controllers) 2 Remote controller is connected...
  • Page 30 Error Code Abnormal point and detection method Judgment and action Case 1 Overcharge of refrigerant 12 Check operating condition of refrigerant Freezing/overheating protection is working 2 Defective refrigerant circuit (clogs) Overheating protection <Heating mode> circuit. 3 Malfunction of linear expansion valve Abnormal if condensing temperature of 4 Reduced water flow 3 Check linear expansion valve.
  • Page 31 Phenomena Factor Countermeasure 1 After cancelling to select function from the remote 1 Normal operation 3. When pressing the remote controller operation switch, the OPERATION controller, the remote controller operation switch will display is appeared but it will be be not accepted for approx. 30 seconds. turned off soon.
  • Page 32 Phenomena Countermeasure A fl owing water sound or occasional hissing sound is heard. These sounds can be heard when refrigerant and/or water is (are) fl owing in the in- door unit or refrigerant pipe, or when the refrigerant and/or water is (are) chugging. Water does not heat or cool well.
  • Page 33 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 34: 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 35 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 36 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 37 • 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 38 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 39 Phone Calls From Customers How to Respond Note Something Air blows out for a while after However, this control is also 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 40 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;...

This manual is also suitable for:

Puhz-sw100yha.ukPuhz-sw120vha.ukPuhz-sw120yha.ukPuhz-sw75vha-bs.ukPuhz-sw100vha-bs.ukPuhz-sw100yha-bs.uk ... Show all

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