Mitsubishi Electric MSZ-AP42VG-E1 User Manual

1
SERVICE MANUAL
INDOOR UNIT
PARTS CATALOG (OBB788)
No. OBH788
REVISED EDITION-C
Outdoor unit service manual
MUZ-AP∙VG/VGH Series (OBH789)
MXZ-D∙VA/VAH Series (OBH626)
MXZ-E∙VA/VAH Series (OBH723)
MXZ-F∙VF/VFH Series (OBH790)
CONTENTS
1. TECHNICAL CHANGES ∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙ 3
2. PART NAMES AND FUNCTIONS ∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙ 4
3. SPECIFICATION ∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙ 6
4. NOISE CRITERIA CURVES ∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙ 9
5. OUTLINES AND DIMENSIONS ∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙11
6. WIRING DIAGRAM ∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙ 12
7. REFRIGERANT SYSTEM DIAGRAM ∙∙∙∙∙∙∙∙∙∙∙∙∙ 18
8. SERVICE FUNCTIONS ∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙ 19
9. MICROPROCESSOR CONTROL ∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙ 21
10. TROUBLESHOOTING ∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙ 29
11. DISASSEMBLY INSTRUCTIONS ∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙ 45
OBH788 REVISED EDITION-B is void.
MSZ-AP25VG
MSZ-AP35VG
MSZ-AP42VG
MSZ-AP50VG
MSZ-AP25VGK
MSZ-AP35VGK
MSZ-AP42VGK
MSZ-AP50VGK
Revision C:
• MSZ-AP25/35/42VG-
E2
,
EN2
,
ET2
,
MSZ-AP25/35/42VGK-
E2
,
EN2
,
ET2
,
MSZ-AP50VG-
ER1
,
E2
,
EN2
,
ET2
,
MSZ-AP50VGK-
ER1
,
E2
,
EN2
,
ET2
,
MSZ-AP60/71VG-
ER1
,
E2
,
ET2
,
MSZ-AP60/71VGK-
ER1
,
E2
,
ET2
,
have been added.
Models
MSZ-AP25VG
-
E1
,
EN1
,
ET1
,
ER1
,
E2
,
EN2
,
ET2
MSZ-AP25VGK
-
E1
,
EN1
,
ET1
,
ER1
,
E2
,
EN2
,
ET2
MSZ-AP35VG
-
E1
,
EN1
,
ET1
,
ER1
,
E2
,
EN2
,
ET2
MSZ-AP35VGK
-
E1
,
EN1
,
ET1
,
ER1
,
E2
,
EN2
,
ET2
MSZ-AP42VG
-
E1
,
EN1
,
ET1
,
ER1
,
E2
,
EN2
,
ET2
MSZ-AP42VGK
-
E1
,
EN1
,
ET1
,
ER1
,
E2
,
EN2
,
ET2
MSZ-AP50VG
-
E1
,
EN1
,
ET1
,
ER1
,
E2
,
EN2
,
ET2
MSZ-AP50VGK
-
E1
,
EN1
,
ET1
,
ER1
,
E2
,
EN2
,
ET2
MSZ-AP60VG
-
E1
,
ET1
,
ER1
,
E2
,
ET2
MSZ-AP60VGK
-
E1
,
ET1
,
ER1
,
E2
,
ET2
MSZ-AP71VG
-
E1
,
ET1
,
ER1
,
E2
,
ET2
MSZ-AP71VGK
-
E1
,
ET1
,
ER1
,
E2
,
ET2

Mitsubishi Electric MSZ-AP42VG-E1 Specifications

General

Brand	Mitsubishi Electric
Model	MSZ-AP42VG-E1
Category	Air Conditioner
Language	English

Summary

Service Functions

Timer Modes

Covers short mode, auto restart, and disabling auto restart.

Remote Controller Configuration

Explains how to set controllers exclusively for specific indoor units.

Auto Restart Function

Wi-Fi Interface Setup

Microprocessor Control

Wireless Remote Controller Operation

Indoor Unit Operation Modes

Cool, Dry, and Fan Modes

Heat and Auto Mode Operation

Auto Vane Operation

Timer Operation

Weekly Timer Operation

Special Operations

Troubleshooting

Troubleshooting Cautions

Important safety and procedural notes before troubleshooting.

Troubleshooting Procedure

Steps for diagnosing abnormalities using the operation indicator lamp.

Failure Mode Recall Function

Failure Mode Recall Flowchart

Step-by-step guide to recall indoor/outdoor unit failure modes.

Deleting Memorized Abnormal Conditions

Process for clearing stored error information.

Indoor Unit Failure Mode Recall Table

Table mapping indicator lamp blinking patterns to failure modes and remedies.

Troubleshooting Instructions

Unit Check Procedure

Flowchart for checking unit operation status and potential issues.

Wi-Fi Interface Troubleshooting Guide

Troubleshooting Check Table

Trouble Criterion of Main Parts

Troubleshooting Flow: Indoor Fan Motor

Remote Controller and PC Board Troubleshooting

Indoor PC Board and Fan Motor Checks

Miswiring and Serial Signal Error Check

Test Point Diagrams and Voltages

Indoor PC Board Test Points and Voltages

Specific test points and voltage readings for the indoor electronic PC board.

Disassembly Instructions

MSZ-AP25VG-50VGK Disassembly Procedures

Fan Motor, Coil Thermistor, Line Flow Fan Removal

Disassembly: MSZ-AP60VG-71VGK

Panel Removal

Wi-Fi Interface Removal and Installation

PC Board and Electrical Box Removal

Nozzle Assembly and Vane Motor Removal

Water Cut, Fan Motor, Coil Thermistor, Line Flow Fan Removal