Mitsubishi Electric MUZ-AY35VGH-SC1 User Manual

No. OBH931
PARTS CATALOG (OBB931)
SERVICE MANUAL
OUTDOOR UNIT
CONTENTS
1. TECHNICAL CHANGES ······························3
2. SERVICING PRECAUTIONS FOR UNITS
USING REFRIGERANT R32 ························· 4
3. PART NAMES AND FUNCTIONS ··················6
4. SPECIFICATION ········································7
5. NOISE CRITERIA CURVES ··························9
6. OUTLINES AND DIMENSIONS ··················· 10
7. WIRING DIAGRAM ··································· 12
8. REFRIGERANT SYSTEM DIAGRAM ··········· 18
9. PERFORMANCE CURVES ·························20
10. ACTUATOR CONTROL ····························· 36
11. SERVICE FUNCTIONS ······························37
12. TROUBLESHOOTING ······························· 38
13. DISASSEMBLY INSTRUCTIONS ·················58
Models
MUZ-AY25VG
-
E1
,
ET1
,
ER1
MUZ-AY35VG
-
E1
,
ET1
,
ER1
MUZ-AY42VG
-
E1
,
ET1
,
ER1
MUZ-AY50VG
-
E1
,
ET1
,
ER1
MUZ-AY25VGH
-
SC1
MUZ-AY35VGH
-
SC1
MUZ-AY42VGH
-
SC1
MUZ-AY50VGH
-
SC1
MUZ-AY25VG
MUZ-AY35VG
MUZ-AY42VG
MUZ-AY25VGH
MUZ-AY35VGH
MUZ-AY42VGH
Indoor unit service manual
MSZ-AY•VG, VGK, VGKP Series (OBH930, 932)
HFC
utilized
R32

Mitsubishi Electric MUZ-AY35VGH-SC1 Specifications

General

Brand	Mitsubishi Electric
Model	MUZ-AY35VGH-SC1
Category	Air Conditioner
Language	English

Summary

Outdoor Unit Service Manual

Refrigerant Handling Precautions

WARNING

Specific warnings regarding refrigerant handling and compressor risks.

Servicing Precautions for Refrigerant R32 Units

Safety Checks and Work Area Guidelines

Safety checks and controlled procedures for working with flammable refrigerants.

Equipment and Electrical Checks

Checks on refrigeration equipment and electrical component safety procedures.

Repair Precautions

Flammable Refrigerant Handling Procedures

Wiring Diagrams

Wiring Diagrams (MUZ-AY25/35VGH Models)

Wiring Diagrams (MUZ-AY42VG Models)

Wiring Diagrams (MUZ-AY42VGH Model)

Wiring Diagrams (MUZ-AY50VG Models)

Wiring Diagrams (MUZ-AY50VGH Model)

Refrigerant System Diagrams

Refrigerant Piping and Charge Specifications

Capacity and Input Curves

Capacity and Input Correction by Compressor Frequency

Performance Data - Cool Operation (MUZ-AY25/VGH)

Performance Data - Cool Operation (MUZ-AY25/VGH Cont.)

Performance Data - Cool Operation (MUZ-AY35/VGH)

Performance Data - Cool Operation (MUZ-AY35/VGH Cont.)

Performance Data - Cool Operation (MUZ-AY42/VGH)

Performance Data - Cool Operation (MUZ-AY42/VGH Cont.)

Performance Data - Cool Operation (MUZ-AY50/VGH)

Performance Data - Cool Operation (MUZ-AY50/VGH Cont.)

Performance Data - Heat Operation (MUZ-AY25/35VG/VGH)

Performance Data - Heat Operation (MUZ-AY50VG/VGH)

Actuator Control

Outdoor Fan Motor Control

R.V. Coil and Valve Control

Sensor to Actuator Relationships

Service Functions

Defrost Setting Adjustment

Pre-Heat Control Configuration

Troubleshooting

Troubleshooting Cautions

Important cautions and checks before and during troubleshooting procedures.

Failure Mode Recall Function Overview

Failure Mode Recall Function Procedure

Detailed Outdoor Unit Failure Analysis

Outdoor Unit Failure Mode Recall Table

Troubleshooting Check Table Details

Troubleshooting Criteria for Main Parts

Troubleshooting Flowcharts

Inverter and Compressor Checks

Steps to check the inverter and compressor for operation and faults.

Open Phase and Compressor Winding Checks

Procedures to diagnose open phase and compressor winding issues.

Compressor Operation and Start Failure Diagnosis

Outdoor Thermistor Resistance Checks

Reversing Valve Coil (R.V. Coil) Check

Outdoor Fan Motor Diagnosis

Power Supply and Board Checks

Expansion Valve (LEV) Operation Check

Inverter P.C. Board Fault Diagnosis

Miswiring and Serial Signal Error Checks

Outdoor Refrigerant Circuit Checks

Inverter P.C. Board Test Points and Voltage