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INDOOR UNIT
SERVICE MANUAL
Models
MSZ-AP15VG
MSZ-AP20VG
MSZ-AP15VGK
MSZ-AP20VGK
MSZ-AP15VG
MSZ-AP20VG
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E1
ET1
ER1
E2
ET2
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E1
ET1
ER1
E2
ET2
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E1
ET1
ER1
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Outdoor unit service manual
MUZ-AP∙VG Series (OBH839)
MXZ-D∙VA Series (OBH626)
MXZ-E∙VA Series (OBH723)
MXZ-F∙VF Series (OBH790)
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 ··········· 11
8. SERVICE FUNCTIONS ······························ 12
9. MICROPROCESSOR CONTROL ················ 14
10. TROUBLESHOOTING ······························· 21
11. DISASSEMBLY INSTRUCTIONS ················· 35
PARTS CATALOG (OBB838)
Revision B:
• MSZ-AP15/20VG-
,
and
E2
ET2
MSZ-AP15/20VGK-
,
E1
ET1
been added.
OBH838 REVISED EDITION-A is void.
No. OBH838
REVISED EDITION-B
,
have
ER1
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Table of Contents
Related Manuals for Mitsubishi Electric MSZ-AP15 VGK
Summarization of Contents
Part Names and Functions
Accessories List
Lists all included accessories for the indoor unit.
Service Functions
Timer Short Mode Function
Shortens ON/OFF timer set time and compressor start time for service.
Remote Controller Pairing for Specific Indoor Unit
Procedure to assign unique numbers to remote controllers for multi-unit rooms.
Auto Restart Function
Unit automatically restarts with previous settings after power interruption.
Microprocessor Control
Various Operation Modes
Details on Cool, Dry, Fan, and Heat operations, including special features.
Automatic Mode Changeover
How the unit automatically switches between COOL and HEAT modes.
Automatic Vane Control
Operation and control of the horizontal vane for optimal air distribution.
Timer Functions
Setting and programming On/Off and weekly timer schedules.
Night Mode Operation
Adjusts operation for reduced noise and indicator brightness.
i-save Operation Mode
Setting and cancelling a custom preferred operating mode.
Emergency and Test Operations
Using the emergency switch for test runs or when the remote is unavailable.
3-Minute Compressor Delay
Protects the compressor from overload by delaying restart for 3 minutes.
Troubleshooting
Troubleshooting Cautions
Important safety and handling guidelines before starting troubleshooting.
Failure Mode Recall Function
How to retrieve and interpret stored error codes from the unit.
Troubleshooting Flowcharts and Instructions
Step-by-step diagnostic procedures for common unit issues.
Troubleshooting Symptom Table
Table correlating operation indicator patterns to specific faults and remedies.
Main Part Troubleshooting Criteria
Resistance and voltage checks for key components like thermistors and motors.
Indoor Fan Motor Troubleshooting Flow
Specific diagnostic flow for indoor fan motor errors.
Specific Troubleshooting Checks
Diagnostic procedures for remote control, P.C. boards, wiring, and noise issues.
Disassembly Instructions
Disassembly: MSZ-AP15VG/AP20VG
Step-by-step instructions for removing the front panel and other components.
Disassembly: MSZ-AP15VGK/AP20VGK
Instructions for disassembling panels and internal parts for specific models.
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