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Mitsubishi Electric Mr.Slim MSZ-GC22NA - C1 User Manual

Mitsubishi Electric Mr.Slim MSZ-GC22NA - C1
48 pages
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SERVICE MANUAL
CONTENTS
1. PART NAMES AND FUNCTIONS ····················· 3
2. SPECIFICATION ················································ 4
3. OUTLINES AND DIMENSIONS ························ 5
4. WIRING DIAGRAM ············································ 7
5. REFRIGERANT SYSTEM DIAGRAM ··············· 9
6. SERVICE FUNCTIONS ··································· 10
7. MICROPROCESSOR CONTROL ··················· 12
8. TROUBLESHOOTING ····································· 18
9. DISASSEMBLY INSTRUCTIONS ···················· 39
Models
MSZ-GC22NA -
C1
MSZ-GC25NA -
C1
MSZ-GC35NA -
C1
MSZ-GC35NA -
C2
MSZ-GC50NA -
C1
MSZ-GC60NA -
C1
MSZ-GC71NA -
C1
SPLIT-TYPE AIR CONDITIONERS
MSZ-GC22/25/35NA
INDOOR UNIT
Outdoor unit service manual
MUZ-GC·NA Series(OBH482)
MXZ-A·NA Series (OB430)
PARTS CATALOG (OBB481)
NOTE:
RoHS compliant products have <G> mark on the spec name plate.
No. OBH481
REVISED EDITION-A
Please void OBH481.
Revision A:
MSZ-GC35NA -
C2
has been added.
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Mitsubishi Electric Mr.Slim MSZ-GC22NA - C1 Specifications

General IconGeneral
BrandMitsubishi Electric
RefrigerantR410A
TypeSplit System
ModelMSZ-GC22NA - C1
EER (Cooling)12.5
Indoor Unit Dimensions (W x H x D)798 x 295 x 232 mm
Outdoor Unit Dimensions (W x H x D)780 x 540 x 269 mm
Weight (Indoor Unit)9 kg
Indoor Unit Weight9 kg
Weight (Outdoor Unit)121.3 lbs
Outdoor Unit Weight121.3 lbs

Summary

Key Components and Functions

Included Accessories

Lists included accessories for different indoor unit models.

Technical Specifications

Unit Dimensions and Layout

Electrical Wiring Diagrams

Refrigerant System Schematics

Service Mode Functions

Timer Short Mode for Service

Shortens timer set time for service purposes.

PC Board Modification for Multi-Unit Control

Modifies PC boards for individual operation of multiple indoor units.

Automatic Restart Function

Allows the unit to restart automatically after power failure.

Control System and Operation

Remote Controller Operation

Explains the functions and buttons of the wireless remote controller.

Indoor Unit Indicator Lamps

Describes the meaning of the indoor unit's operation indicator lamps.

Cooling Mode Operation

Details the operation steps and features for cooling mode.

Dehumidify Mode Operation

Details the operation steps and features for dry mode.

Heating Mode Operation

Details the operation steps and features for heating mode.

Automatic Mode Switching

Explains how the unit automatically switches between cooling and heating.

Automatic Airflow Vane Control

Describes the automatic operation of the horizontal vane for air direction.

Timer Settings and Operation

Explains how to set and use the ON/OFF timers and program timer.

Emergency and Test Operation Modes

How to perform emergency or test operation without a remote controller.

Compressor 3-Minute Delay

Explains the compressor protection feature that delays restart.

Fault Diagnosis and Repair

Troubleshooting Precautions

Important safety and preliminary checks before troubleshooting.

Failure Mode Recall Functionality

How to recall and check stored error codes for diagnosis.

General Troubleshooting Flowchart

General flowchart for diagnosing unit malfunctions.

Troubleshooting Indicator Table

Table linking operation indicator patterns to specific faults.

Key Component Trouble Criteria

Resistance and voltage checks for key components.

Specific Troubleshooting Flows

Detailed troubleshooting steps for specific issues like fan motor errors.

Remote Controller and PC Board Checks

Steps to check remote controller and indoor PC board for issues.

Indoor PC Board and Fan Motor Checks

Detailed checks for indoor PC board and fan motor issues.

Miswiring and Serial Signal Error Diagnosis

Procedure to diagnose wiring and communication errors.

Horizontal Vane Installation Check

Steps to check if the horizontal vane is installed correctly.

Electromagnetic Noise Interference

How to troubleshoot and prevent electromagnetic interference.

PC Board Test Points and Voltages

Diagrams showing test points and expected voltages on PC boards.

Disassembly Procedures

Disassembly: MSZ-GC22/25/35NA Models

Step-by-step guide to disassembling specific indoor unit models.

Disassembly: MSZ-GC50NA Model

Step-by-step guide to disassembling the MSZ-GC50NA indoor unit.

Disassembly: MSZ-GC60/71NA Models

Step-by-step guide to disassembling the MSZ-GC60NA/GC71NA indoor units.

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