Mitsubishi Electric Mr.SLIM SUZ-M35VAR1.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-M35VAR1.TH Specifications

General

Brand	Mitsubishi Electric
Model	Mr.SLIM SUZ-M35VAR1.TH
Category	Air Conditioner
Language	English

Summary

Combination of Indoor and Outdoor Units

Safety Precautions for Air Conditioners

Cautions Related to New Refrigerant

Specific precautions for R32 refrigerant.

Service Warnings and Refrigerant Cautions

Cautions for Unit Using R32 Refrigerant

Detailed precautions for R32 refrigerant safety.

Wiring Diagram

Refrigerant System Diagram

Refrigerant Piping Information

Pumping Down Procedure

Procedure for safely removing refrigerant from the system.

Troubleshooting Guide

11-1. Cautions on Troubleshooting

Safety and procedural guidelines before troubleshooting.

11-2. Troubleshooting Check Table

Table of symptoms, LED codes, conditions, and remedies for unit errors.

11-3. How to Proceed "Self-Diagnosis"

Guide to interpreting error codes from the self-diagnosis feature.

11-4. Trouble Criterion of Main Parts

Methods and criteria for checking key component functionality.

11-5. Troubleshooting Flow

Flowcharts for diagnosing inverter and compressor issues.

B Check of Open Phase

Procedure to check inverter phase voltage balance.

C Check of Compressor

Procedure to check compressor winding and operation.

D Check of Compressor Winding

Method to measure compressor winding resistance.

E Check of Compressor Operation Time

How to measure compressor operation time until shutdown.

F Check of Outdoor Thermistors

How to check the resistance of outdoor thermistors.

G) Check of R.V. Coil

How to check the resistance of the reversing valve coil.

H Check of Outdoor Fan Motor

How to check the outdoor fan motor and its voltage.

① Check of LEV

Procedure to check the Expansion Valve (LEV) coil.

J Check of Inverter P.C. Board

Steps to diagnose issues with the inverter P.C. board.

Check of Outdoor Refrigerant Circuit

Test Point Diagram and Voltage

11-6-1. Inverter P.C. Board

Detailed test point diagram of the inverter P.C. board.

11-6-2. Inverter P.C. Board

Detailed test point diagram of the inverter P.C. board for different models.

Disassembly Procedure

1. Removing the Cabinet and Panels

2. Removing the Inverter Assembly and P.C. Board

3. Removing the R.V. Coil

4. Removing Various Thermistors

5. Removing the Outdoor Fan Motor

6. Removing the Compressor and 4-way Valve

1. Removing Cabinet (SUZ-M50VA)

2. Removing Inverter Assembly (SUZ-M50VA)

1. Removing Cabinet (SUZ-M60/71)

2. Removing Inverter Assembly (SUZ-M60/71)

3. Removing R.V. Coil (SUZ-M60/71)

4. Removing Thermistors (SUZ-M60/71)

5. Removing Outdoor Fan Motor (SUZ-M60/71)

6. Removing Compressor and 4-way Valve (SUZ-M60/71)

Remote Controller Error Handling

13-2. Error Information

Remote Controller Service Menu

13-3. Service Menu

Remote Controller Test Run Procedures

13-4. Test Run

13-4-1. PAR-41MAA Test Run

13-4-2. PAR-SL97A-E Test Run

13-4-3. PAR-SL101A-E Test Run

Error History Management

13-7. Error History

Self-Diagnosis Procedures

13-8. Self-Diagnosis

13-8-1. PAR-41MAA Self-Diagnosis

13-8-2. PAR-SL97A-E Malfunction Diagnosis

13-8-3. PAR-SL101A-E Malfunction Diagnosis

Remote Controller Check

13-9. Remote Controller Check