Mitsubishi Electric Mr.Slim PUZ-ZM71VHA User Manual

SERVICE MANUAL
R32
PARTS CATALOG (OCB653)
CONTENTS
TECHNICAL CHANGES ·······························2
1. REFERENCE MANUAL ···························· 2
2. SAFETY PRECAUTION ···························· 2
3. FEATURES ·········································· 12
4. SPECIFICATIONS ································· 13
5. DATA ·················································· 14
6. OUTLINES AND DIMENSIONS ················ 17
7. WIRING DIAGRAM ································ 19
8. WIRING SPECIFICATIONS ····················· 21
9. REFRIGERANT SYSTEM DIAGRAM ·········· 26
10. TROUBLESHOOTING ···························· 28
11. FUNCTION SETTING ····························· 83
12. MONITORING THE OPERATION DATA BY THE REMOTE CONTROLLER ···88
13. EASY MAINTENANCE FUNCTION ··········· 97
14. DISASSEMBLY PROCEDURE ················· 99
PUZ-ZM35VKA(-ET/-ER)
PUZ-ZM50VKA(-ET/-ER)
Note:
• This manual describes service
data of the outdoor units only.
September 2019
SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS
Outdoor unit
[Model Name] [Service Ref.]
No. OCH653
REVISED EDITION-C
Revision:
•Added
PUZ-ZM71VHAR1 and
PUZ-ZM71VHAR1-ET
in REVISED EDITION-C.
OCH653 REVISED EDITION-B
is void.
PUZ-ZM35VKA
PUZ-ZM35VKA-ER
PUZ-ZM50VKA
PUZ-ZM50VKA-ER
PUZ-ZM60VHA
PUZ-ZM60VHA-ER
PUZ-ZM71VHA
PUZ-ZM71VHA-ER
PUZ-ZM35VKA
PUZ-ZM35VKA-ET
PUZ-ZM35VKA-ER
PUZ-ZM50VKA
PUZ-ZM50VKA-ET
PUZ-ZM50VKA-ER
PUZ-ZM60VHA
PUZ-ZM60VHA-ET
PUZ-ZM60VHA-ER
PUZ-ZM71VHA
PUZ-ZM71VHAR1
PUZ-ZM71VHA-ET
PUZ-ZM71VHAR1-ET
PUZ-ZM71VHA-ER

Mitsubishi Electric Mr.Slim PUZ-ZM71VHA Specifications

General

Series	Mr.Slim
Cooling Capacity	7.1 kW
Heating Capacity	8.0 kW
Power Supply	220-240 V, 50 Hz
Refrigerant	R410A
Outdoor Unit Noise Level	53 dB(A)
Indoor Unit Weight	12 kg
Energy Efficiency Ratio (EER)	3.61
Energy Efficiency Ratio (Cooling)	3.61

Summary

Safety Precautions

Always Observe for Safety

Emphasizes general safety rules before accessing terminals, ensuring circuits are disconnected.

Cautions Related to New Refrigerant

Provides specific cautions for handling R32 refrigerant and related tools, emphasizing safety.

Cautions for Unit Using R32 Refrigerant

Information on Servicing

Details safety checks and procedures for servicing equipment with flammable refrigerants.

Detection of Flammable Refrigerants

Explains methods for detecting flammable refrigerants and avoiding ignition sources.

Leak Detection Methods

Details techniques and equipment for detecting refrigerant leaks, including specific methods for flammable refrigerants.

Removal and Evacuation

Describes the procedure for removing and evacuating refrigerant safely, especially for flammable types.

Charging Procedures

Outlines requirements for refrigerant charging, including safety and best practices.

Refrigerant Recovery Best Practices

Details best practices and requirements for safe refrigerant recovery and transfer.

Precautions for Reusing Existing R22/R410a Refrigerant Pipes

Cautions for Refrigerant Piping Work

Highlights cautions for refrigerant piping work, including tool requirements and pressure differences.

Technical Specifications

Wiring Diagrams

Wiring Diagrams for PUZ-ZM35/50VKA

Provides wiring diagrams for PUZ-ZM35VKA/50VKA outdoor units, detailing component connections.

Wiring Diagrams for PUZ-ZM60/71VHA

Presents wiring diagrams for PUZ-ZM60VHA/71VHA outdoor units, showing component interconnections.

Refrigerant System Diagrams

Refrigerant Collecting (Pump Down) Procedure

Error Information and Reset

Error History and Management

Deleting Error History

Self-Diagnosis Procedures

Self-Diagnosis with PAR-4xMAA Controller

Details the self-diagnosis procedure for models using PAR-4xMAA remote controllers.

Remote Controller Check

Guides on checking the remote controller's functionality and diagnosing communication issues.

Self-Diagnosis with Wireless Controllers

Explains the self-diagnosis process for different wireless remote controller types.

Troubleshooting Error Codes

Self-Diagnosis Action Table

Troubleshooting Communication Errors (EA, Eb, EC)

Troubleshooting Unit Operation Errors (U1-U8)

Troubleshooting Component Errors (U9, Ud-U8)

Troubleshooting Power and Control Errors (U9)

Troubleshooting Performance Errors (Ud-UL)

Troubleshooting Communication and Remote Errors (UP, E0-E5)

Troubleshooting Unit Communication Errors (E6-E9)

Troubleshooting System and Refrigerant Errors (EF, PL, Ed, EE)

Troubleshooting M-NET Communication Errors (A0-A8)

Troubleshooting Transmission Errors (A7, A8)

Component Checking Procedures

Checking Thermistors and Coils

Provides methods to check the resistance of various thermistors, solenoid valve coils, and compressor motors.

DC Fan Motor Check

Details how to check the DC fan motor and its associated circuit board for rotation issues.

Checking System Components

Lists thermistor resistance charts and formulas for checking component values.

Emergency Operation Procedures

Emergency Operation Conditions and Cautions

Lists critical checks and cautions to be observed before and during emergency operation.

Initiating Emergency Operation

Provides a step-by-step procedure for initiating emergency operation.

Releasing Emergency Operation

Details the steps to disable emergency operation and return the unit to normal mode.

Emergency Operation Data

Test Point Diagrams

Outdoor Unit Indicator and Error Code Display

Troubleshooting Outdoor Unit Indicator Codes

Troubleshooting Component Error Codes

Details error codes related to thermistors, fan motors, and other components.

Troubleshooting Communication and System Error Codes

Covers communication errors, M-NET system errors, and refrigerant-related issues.

Disassembly Procedures

Removing Panels and Fan Motor

Removing Electrical Parts Box and Thermistors

Removing Valve Coils and LEV

Removing 4-way Valve Coil and LEV Coils

Removing 4-way Valve and LEV

Removing Compressor and Power Receiver

Provides steps for removing the compressor and power receiver.

Removing Fan Motor (MF1)

Removing Electrical Parts Box

Disassembly of Valve Assemblies and Switches

Disassembly of Compressor and Power Receiver

Steps for removing the compressor and power receiver.