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Mitsubishi Electric MS-GF25VA User Manual

Mitsubishi Electric MS-GF25VA
43 pages
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CONTENTS
1. TECHNICAL CHANGES ··································· 2
2. PART NAMES AND FUNCTIONS ····················· 3
3. SPECIFICATION ················································ 5
4. NOISE CRITERIA CURVES ······························ 6
5. OUTLINES AND DIMENSIONS ························ 8
6. WIRING DIAGRAM ············································ 9
7. REFRIGERANT SYSTEM DIAGRAM ············· 10
8. SERVICE FUNCTIONS ··································· 12
9. MICROPROCESSOR CONTROL ··················· 14
10. TROUBLESHOOTING ····································· 21
11. DISASSEMBLY INSTRUCTIONS ···················· 35
SPLIT-TYPE AIR CONDITIONERS
Outdoor unit service manual
MU-GF·VA Series (OBH622)
SERVICE MANUAL
INDOOR UNIT
PARTS CATALOG (OBB621)
NOTE:
RoHS compliant products have <G> mark on the spec name plate.
Models
MS-GF20VA
-
E1
MS-GF25VA
-
E1
MS-GF35VA
-
E1
MS-GF50VA
-
E1
MS-GF60VA
-
E1
MS-GF80VA
-
E1
No. OBH621
REVISED EDITION-A
Please void OBH621.
Revision A:
MS-GF50VA-
E1
, MS-GF60VA-
E1
and
MS-GF80VA-
E1
have been added.
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Mitsubishi Electric MS-GF25VA Specifications

General IconGeneral
BrandMitsubishi Electric
ModelMS-GF25VA
CategoryAir Conditioner
LanguageEnglish

Summary

TECHNICAL CHANGES

PART NAMES AND FUNCTIONS

Component Identification for MS-GF20/25/35VA

Identifies internal and external components of the MS-GF20VA, MS-GF25VA, and MS-GF35VA indoor units.

Component Identification for MS-GF50/60/80VA

Identifies internal and external components of the MS-GF50VA, MS-GF60VA, and MS-GF80VA indoor units.

Included Accessories

Lists all accessories provided with the indoor units for installation and operation.

SPECIFICATION

NOISE CRITERIA CURVES

Noise Criteria Curves for MS-GF20/25/35VA

Presents sound pressure levels across frequency bands for MS-GF20, MS-GF25, and MS-GF35VA models.

Noise Criteria Curves for MS-GF50/60/80VA

Presents sound pressure levels across frequency bands for MS-GF50, MS-GF60, and MS-GF80VA models.

OUTLINES AND DIMENSIONS

Dimensions for MS-GF20/25/35VA

Provides detailed physical dimensions and installation measurements for MS-GF20, MS-GF25, and MS-GF35VA indoor units.

Dimensions for MS-GF50/60/80VA

Provides detailed physical dimensions and installation measurements for MS-GF50, MS-GF60, and MS-GF80VA indoor units.

WIRING DIAGRAM

Wiring Diagram for MS-GF20/25/35VA

Illustrates the electrical connections for the MS-GF20, MS-GF25, and MS-GF35VA indoor unit's internal circuitry.

Wiring Diagram for MS-GF50/60/80VA

Illustrates the electrical connections for the MS-GF50, MS-GF60, and MS-GF80VA indoor unit's internal circuitry.

REFRIGERANT SYSTEM DIAGRAM

Refrigerant System Diagram for MS-GF20/25/35VA

Shows the refrigerant flow and components for MS-GF20, MS-GF25, and MS-GF35VA indoor units.

Refrigerant System Diagram for MS-GF50/60/80VA

Shows the refrigerant flow and components for MS-GF50, MS-GF60, and MS-GF80VA indoor units.

SERVICE FUNCTIONS

Timer Short Mode

Details the procedure to shorten the timer setting for service purposes by short-circuiting specific points.

PC Board Modification for Individual Operation

Explains how to modify remote controller PC boards for operating multiple indoor units individually.

Auto Restart Function

Describes the auto restart function and how to disable it, allowing the unit to resume operation after power loss.

MICROPROCESSOR CONTROL

Wireless Remote Controller Operation

Details the functions and buttons of the wireless remote controller used for operating the indoor units.

Indoor Unit Display Indicators

Explains the meaning of the operation indicator lamp states and their relation to unit status.

Operation Modes (Cool, Dry, Fan, I Feel Control)

Describes the different operating modes available, including Cool, Dry, Fan, and the intelligent 'I FEEL CONTROL'.

Vane Operation Modes

Covers the functionality of auto vane operation, including horizontal and vertical vane movements and settings.

Timer Operation Settings

Provides instructions on setting the ON and OFF timers, including program timer combinations.

Emergency and Test Operation Modes

Explains how to use the emergency and test operation modes for servicing or when the remote is unavailable.

TROUBLESHOOTING

10-1. Cautions on Troubleshooting

Outlines essential safety precautions and preliminary checks before performing troubleshooting procedures.

10-2. Failure Mode Recall Function

Describes how to recall and interpret memorized error codes indicated by the unit's operation lamp.

10-3. Troubleshooting Instruction Flow

Presents a flowchart to guide the user through diagnosing and resolving common indoor unit operational issues.

10-4. Troubleshooting Check Table

Lists common abnormal points, their indicator patterns, symptoms, conditions, and recommended remedies.

10-5. Trouble Criterion of Main Parts

Details the methods and criteria for measuring the resistance of key internal components for fault diagnosis.

10-6.A Indoor Fan Motor Troubleshooting Flow

Step-by-step troubleshooting guide for diagnosing issues with the indoor fan motor on specific models.

10-6.B Remote Controller and PC Board Checks

Troubleshooting steps for remote controller and indoor electronic control PC board communication issues.

10-6.C PC Board and Fan Motor Checks

Diagnostic flow for indoor electronic control PC board and fan motor issues on specific models.

Electromagnetic Noise Troubleshooting

Guidance on identifying and resolving electromagnetic noise interference affecting nearby TV sets or radios.

10-7. Test Point Diagram and Voltage

Provides diagrams and voltage specifications for testing key points on indoor electronic and power PC boards.

DISASSEMBLY INSTRUCTIONS

Disassembly for MS-GF20/25/35VA Models

Step-by-step guide for disassembling the indoor unit for MS-GF20, MS-GF25, and MS-GF35VA models.

Disassembly for MS-GF50/60/80VA Models

Step-by-step guide for disassembling the indoor unit for MS-GF50, MS-GF60, and MS-GF80VA models.

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