Mitsubishi Electric MSZ-AY42VGKP-E6 User Manual

SERVICE MANUAL
INDOOR UNIT
PARTS CATALOG (OBB930)
CONTENTS
1. TECHNICAL CHANGES ······························3
2. PART NAMES AND FUNCTIONS ··················4
3. SPECIFICATION ········································5
4. NOISE CRITERIA CURVES ··························6
5. OUTLINES AND DIMENSIONS ·····················7
6. WIRING DIAGRAM ·····································8
7. REFRIGERANT SYSTEM DIAGRAM ··········· 10
8. SERVICE FUNCTIONS ······························ 11
9. MICROPROCESSOR CONTROL ·················17
10. TROUBLESHOOTING ······························· 25
11. DISASSEMBLY INSTRUCTIONS ················· 41
Models
MSZ-AY25VGK -
E6
MSZ-AY25VGKP -
E6
MSZ-AY35VGK -
E6
MSZ-AY35VGKP -
E6
MSZ-AY42VGK -
E6
MSZ-AY42VGKP -
E6
MSZ-AY50VGK -
E6
MSZ-AY50VGKP -
E6
Outdoor unit service manual
MUZ-AY∙VG/VGH Series (OBH931)
MXZ-F∙VF/VFH Series (OBH790)
No. OBH930

Mitsubishi Electric MSZ-AY42VGKP-E6 Specifications

General

Cooling Capacity	4.2 kW
Power Supply	220-240 V, 50 Hz
Refrigerant	R32
Weight (Indoor Unit)	9.5 kg
Energy Efficiency Class Cooling	A+++
Energy Efficiency Class Heating	A++
Type	Split System
Indoor Unit Noise Level	19 dB (Low)

Summary

Indoor Unit Specifications

Indoor Unit Wiring Diagrams

Refrigerant System Diagram

Service Functions

Auto Restart Function Operation

Memorizes and resumes operation settings after power restoration.

Wi-Fi Interface Setup and Connection

Guides connection of the Wi-Fi interface to routers for MELCloud access.

Adjusting Room Temperature Correction Value

Microprocessor Control

Automatic Mode Changeover

Timer Operation Settings

Emergency and Test Operation

Procedures for using the emergency switch for testing and troubleshooting.

Troubleshooting

Troubleshooting Safety Precautions

Essential safety guidelines and checks before performing troubleshooting procedures.

Failure Mode Recall Function

Procedure to recall and diagnose stored error codes and abnormal conditions.

General Troubleshooting Instructions

Troubleshooting Error Code Table

A table correlating indicator lamp patterns with specific faults and remedies.

Troubleshooting Diagnostic Flows

Visual diagnostic flows for common issues like fan motor and wiring problems.

Test Points and Voltage Specifications

Diagrams and voltage values for testing electronic control boards and components.

Disassembly Instructions

Front Panel and Side Panel Removal

Electrical Box and Air Purifier Removal

Fan, Motor, and Thermistor Removal