Mitsubishi Electric PUZ-WM85VAA User Manual

SERVICE MANUAL
No. OCH727
R32
March 2020
PARTS CATALOG (OCB727)
<Outdoor unit>
[Model Name]
PUZ-WM50VHA
PUZ-WM60VAA
PUZ-WM85VAA
PUZ-WM85YAA
PUZ-WM112VAA
PUZ-WM112YAA
Salt proof model
PUZ-WM50VHA-BS
PUZ-WM60VAA-BS
PUZ-WM85VAA-BS
PUZ-WM85YAA-BS
PUZ-WM112VAA-BS
PUZ-WM112YAA-BS
CONTENTS
1. REFERENCE MANUAL ································ 2
2. SAFETY PRECAUTION ······························· 3
3. SPECIFICATIONS ······································ 10
4. DATA ··························································· 12
5. OUTLINES AND DIMENSIONS·················· 13
6. WIRING DIAGRAM ····································· 15
7. WIRING SPECIFICATIONS ························ 18
8. REFRIGERANT SYSTEM DIAGRAM ········ 19
9. TROUBLESHOOTING ································ 22
10. MONITORING THE OPERATION DATA BY THE REMOTE CONTROLLER ···· 60
11. DISASSEMBLY PROCEDURE ··················· 66
Note:
• This manual describes
service data of the outdoor
units only.
AIR TO WATER HEAT PUMP UNITS
[Service Ref.]
PUZ-WM50VHA.UK
PUZ-WM60VAA.UK
PUZ-WM85VAA.UK
PUZ-WM85YAA.UK
PUZ-WM112VAA.UK
PUZ-WM112YAA.UK
PUZ-WM50VHA-BS.UK
PUZ-WM60VAA-BS.UK
PUZ-WM85VAA-BS.UK
PUZ-WM85YAA-BS.UK
PUZ-WM112VAA-BS.UK
PUZ-WM112YAA-BS.UK
PUZ-WM50VHA.UK

Mitsubishi Electric PUZ-WM85VAA Specifications

General

Model	PUZ-WM85VAA
Category	Heat Pump
Cooling Capacity	8.5 kW
Refrigerant	R410A
Cooling Capacity (BTU)	29, 000 BTU

Summary

SAFETY PRECAUTION

CAUTIONS RELATED TO NEW REFRIGERANT

Specific precautions for units utilizing R32 refrigerant.

WARNING FOR SERVICE

General warnings and safety instructions for service personnel.

CAUTIONS FOR SERVICE

Specific service cautions, including refrigerant handling.

REFRIGERANT CHARGE

CAUTIONS FOR UNIT USING R32 REFRIGERANT

Detailed cautions for units using R32 refrigerant.

CHOOSING THE OUTDOOR UNIT INSTALLATION LOCATION

MINIMUM INSTALLATION AREA

SPECIFICATIONS

WIRING DIAGRAM

COMPONENT SYMBOL LIST

WIRING SPECIFICATIONS

FIELD ELECTRICAL WIRING SPECIFICATIONS

Power wiring specifications for different outdoor unit models.

WIRING SAFETY WARNING

Important safety warning regarding wiring practices.

REFRIGERANT SYSTEM DIAGRAM

REFRIGERANT SYSTEM COMPONENT LIST

TROUBLESHOOTING

GENERAL TROUBLESHOOTING OVERVIEW

Summary of troubleshooting actions based on unit conditions and check codes.

SELF-DIAGNOSIS ACTION TABLE

Table detailing self-diagnosis check codes and corrective actions.

SPECIFIC ERROR CODE TROUBLESHOOTING

Troubleshooting steps for specific error codes (U1-U8).

U9 ERROR CODE ANALYSIS

Detailed analysis and troubleshooting for U9 error codes.

ADDITIONAL ERROR CODE TROUBLESHOOTING

Troubleshooting for U9 (10, 20), Ud, UE, UF, UH error codes.

FURTHER ERROR CODE TROUBLESHOOTING

Troubleshooting for UL, UP, E0/E4 error codes.

COMMUNICATION ERROR TROUBLESHOOTING

Troubleshooting for communication errors (E1-E9, EF, Ed).

SENSOR AND TEMPERATURE ERROR TROUBLESHOOTING

TROUBLESHOOTING OF COMMON PROBLEMS

OPERATIONAL PROBLEM DIAGNOSIS

DISASSEMBLY PROCEDURE

REMOVING MAJOR COMPONENTS