Mitsubishi Electric PUHZ-SW75VHA User Manual

SERVICE MANUAL
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
9.
REFRIGERANT SYSTEM DIAGRAM
...............
19
10. TROUBLESHOOTING
...................................
21
11. DISASSEMBLY PROCEDURE
.....................
65
No.OCH533
REVISED EDITION-A
SPLIT-TYPE, AIR TO WATER HEAT PUMP
R410A
October 2012
PUHZ-SW75VHA.UK
PUHZ-SW75VHA-BS.UK
Salt proof model
PUHZ-SW75VHA-BS
PUHZ-SW100VHA-BS
PUHZ-SW100YHA-BS
PUHZ-SW120VHA-BS
PUHZ-SW120YHA-BS
Note:
• This manual describes
only service data of the
outdoor units.
PUHZ-SW75VHA-BS.UK
PUHZ-SW100VHA-BS.UK
PUHZ-SW100YHA-BS.UK
PUHZ-SW120VHA-BS.UK
PUHZ-SW120YHA-BS.UK
Outdoor unit
[Model names]
PUHZ-SW75VHA
PUHZ-SW100VHA
PUHZ-SW100YHA
PUHZ-SW120VHA
PUHZ-SW120YHA
[Service ref.]
PUHZ-SW75VHA.UK
PUHZ-SW100VHA.UK
PUHZ-SW100YHA.UK
PUHZ-SW120VHA.UK
PUHZ-SW120YHA.UK
PARTS CATALOG (OCB533)
Revision:
• The function description of
SW7-3, 7-4 and 7-5 (Page
52) have been corrected in
REVISED EDITION-A.
• Please void OCH533.

Mitsubishi Electric PUHZ-SW75VHA Specifications

General

Series	PUHZ-SW
Coefficient of Performance (COP)	4.0
Refrigerant	R410A
Type	Air to Water Heat Pump
Power Supply	220-240 V, 50 Hz, 1-Phase
Operating Temperature Range (Cooling)	-10°C to 46°C
Operating Temperature Range (Heating)	-15°C to 30°C

Summary

2 SAFETY PRECAUTION

2-1. ALWAYS OBSERVE FOR SAFETY

General safety guidelines for service operations.

2-2. CAUTIONS RELATED TO NEW REFRIGERANT

Specific warnings and precautions for R410A refrigerant.

Cautions for service

Important safety considerations before, during, and after service.

Additional refrigerant charge

2-3. PRECAUTIONS WHEN REUSING EXISTING R22 REFRIGERANT PIPES

Steps and precautions for reusing R22 refrigerant pipes.

Cautions for refrigerant piping work

Key considerations for handling refrigerant piping with R410A.

4 SPECIFICATIONS

5 DATA

5-1. REFILLING REFRIGERANT CHARGE (R410A : kg)

Refrigerant charge amounts based on piping length.

5-2. COMPRESSOR TECHNICAL DATA

7 WIRING DIAGRAM

8 WIRING SPECIFICATIONS

FIELD ELECTRICAL WIRING (power wiring specifications)

Details on power supply, circuit ratings, and wire specifications.

10 TROUBLESHOOTING

10-1. TROUBLESHOOTING

Summary of error codes and general troubleshooting actions.

10-2. CHECK POINT UNDER TEST RUN

Pre-test run checks and safety precautions.

10-3. SELF-DIAGNOSIS ACTION TABLE

Detailed table for diagnosing errors based on codes and symptoms.

10-4. COMMON TROUBLESHOOTING PHENOMENA

10-5. HOW TO CHECK THE PARTS

Procedures for testing specific components like thermistors and motors.

10-6. HOW TO CHECK THE COMPONENTS

Methods for checking high pressure sensors and DC fan motors.

10-8. FUNCTION OF SWITCHES, CONNECTORS AND JUMPERS

11 DISASSEMBLY PROCEDURE

1. Removing the service panel and top panel

2. Removing the fan motor (MF1)

3. Removing the electrical parts box

7. Removing the 4-way valve coil (21S4), and LEV coil (LEV(A), LEV(B))

8. Removing the 4-way valve

9. Removing LEV

12. Removing the compressor (MC)

13. Removing the power receiver