Mitsubishi Electric Mr.SLIM SUZ-M71VAR1.TH User Manual

TECHNICAL & SERVICE MANUAL
R32
[Model Name]
SUZ-M25VA
SUZ-M25VA-ET
SUZ-M25VA-ER
SUZ-M35VA
SUZ-M35VA-ET
SUZ-M35VA-ER
SUZ-M50VA
SUZ-M50VA-ET
SUZ-M50VA-ER
SUZ-M60VA
SUZ-M60VA-ET
SUZ-M60VA-ER
SUZ-M71VA
SUZ-M71VA-ET
SUZ-M71VA-ER
SUZ-M25VA.TH
SUZ-M35VA.TH
PARTS CATALOG (OCB684)
SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS
[Service Ref.]
SUZ-M25VA.TH
SUZ-M25VAR1.TH
SUZ-M25VAR2.TH
SUZ-M25VA-ET.TH
SUZ-M25VA-ETR2.TH
SUZ-M25VA-ERR2.TH
SUZ-M35VA.TH
SUZ-M35VAR1.TH
SUZ-M35VAR2.TH
SUZ-M35VA-ET.TH
SUZ-M35VA-ETR2.TH
SUZ-M35VA-ERR2.TH
SUZ-M50VA.TH
SUZ-M50VAR1.TH
SUZ-M50VAR2.TH
SUZ-M50VA-ET.TH
SUZ-M50VA-ETR2.TH
SUZ-M50VA-ERR2.TH
SUZ-M60VA.TH
SUZ-M60VAR1.TH
SUZ-M60VAR2.TH
SUZ-M60VA-ET.TH
SUZ-M60VA-ETR2.TH
SUZ-M60VA-ERR2.TH
SUZ-M71VA.TH
SUZ-M71VAR1.TH
SUZ-M71VA-ET.TH
SUZ-M71VA-ETR1.TH
SUZ-M71VA-ERR1.TH
No. OCH684
REVISED EDITION-G
December 2022
Note:
•This service manual
describes service data of
the outdoor units only.
OCH684-F is void.
Revision:
• Connectable indoor units
have been added in
REVISED EDITION-G.
CONTENTS
TECHNICAL CHANGES ·························· 2
1. COMBINATION OF INDOOR AND
OUTDOOR UNITS ······························3
2. SAFETY PRECAUTION ·······················4
3. PARTS NAMES AND FUNCTIONS ······ 12
4. SPECIFICATION ······························ 13
5. NOISE CRITERIA CURVES ················ 15
6. OUTLINES AND DIMENSIONS ··········· 16
7. WIRING DIAGRAM ··························· 18
8. REFRIGERANT SYSTEM DIAGRAM ··· 22
9. ACTUATOR CONTROL ····················· 25
10. SERVICE FUNCTIONS ······················ 26
11. TROUBLESHOOTING ······················· 26
12. DISASSEMBLY PROCEDURE ············ 38
13. REMOTE CONTROLLER ··················· 49

Mitsubishi Electric Mr.SLIM SUZ-M71VAR1.TH Specifications

General

Model	SUZ-M71VAR1.TH
Brand	Mitsubishi Electric
Type	Outdoor Unit
Cooling Capacity	7.1 kW
Cooling Capacity (BTU/h)	24, 200 BTU/h
Heating Capacity	8.0 kW
Refrigerant	R410A
Power Source	Electric
Power Supply	220-240 V, 50 Hz
Series	Mr.SLIM
Operating Temperature (Heating)	-20 to +24 °C

Summary

Technical Changes and Model Updates

Indoor and Outdoor Unit Combinations

Safety Precautions for Refrigerant Systems

General Safety Observances

Refrigerant R32 Handling Cautions

Specific safety measures for units using R32 refrigerant during preparation and repair.

Technical Specifications

Wiring Diagrams

Refrigerant System Diagrams

Refrigerant Piping and Charging Procedures

Pumping Down Procedure

Troubleshooting Guide

Troubleshooting Cautions

Troubleshooting Check Table

Lists common symptoms, LED indications, conditions, and remedies for troubleshooting.

Self-Diagnosis Procedures

Steps for performing self-diagnosis and interpreting error codes via the remote controller.

Trouble Criteria for Main Parts

Methods for checking the resistance and condition of key components like motors and thermistors.

Troubleshooting Flowcharts

Step-by-step guides for diagnosing issues with the inverter, compressor, and thermistors.

Inverter P.C. Board Test Points and Voltages

Inverter P.C. Board Details (M60/71)

Disassembly Procedures

Inverter Assembly and P.C. Board Removal

Compressor and 4-Way Valve Removal

Remote Controller Functions and Operation

Menu Structure and Navigation

Error Information Display

How to view and interpret error codes displayed on the remote controller.

Service Menu Operations

Test Run Functionality

Guides for performing test runs and checking unit operations via the remote controller.

Function Setting Procedures

Error History and Self-Diagnosis