Mitsubishi Electric MU-GD18ND User Manual

SERVICE MANUAL
Wireless type
Models
No. TBH0
17
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OUTDOOR UNIT
Indoor unit service manual
MS-GD•ND Series (TBH015)
MU-GD15ND-
C1
MU-GD18ND-
C1
MU-GD24ND-
C1
MU-GD15ND-
C1
MU-GD18ND-
C1
TECHNICAL CHANGES.....................................
PART NAMES AND FUNCTIONS
......................
SPECIFICATION................................................
OUTLINES AND DIMENSIONS.........................
WIRING DIAGRAM............................................
REFRIGERANT SYSTEM DIAGRAM
................
PERFORMANCE CURVES...............................
TROUBLESHOOTING.......................................
DISASSEMBLY INSTRUCTIONS
.....................
2
3
3
4
5
7
9
12
16
1.
2.
3.
4.
5.
6.
7.
8.
9.
CONTENTS
PARTS CATALOG (TBB017)
NOTE:
• RoHS compliant products have <G> mark on the spec name plate.
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Mitsubishi Electric MU-GD18ND Specifications

General

Brand	Mitsubishi Electric
Model	MU-GD18ND
Category	Air Conditioner
Language	English

Summary

Electrical Wiring Diagrams

MU-GD15ND Wiring Layout

Illustrates the electrical connections for the MU-GD15ND outdoor unit.

MU-GD18ND Wiring Layout

Illustrates the electrical connections for the MU-GD18ND outdoor unit.

Electrical Wiring Diagrams (Continued)

MU-GD24ND Wiring Layout

Illustrates the electrical connections for the MU-GD24ND outdoor unit.

Refrigerant Flow Diagrams

MU-GD15ND/GD18ND Refrigerant Circuit

Diagram showing the refrigerant path for MU-GD15ND and MU-GD18ND models.

MU-GD24ND Refrigerant Circuit

Troubleshooting Precautionary Measures

Safety and Preparation Steps

Important safety precautions and preparation for troubleshooting.

Initial Troubleshooting Steps

Basic procedures to follow before starting detailed fault diagnosis.

Troubleshooting Guidance

Fault Finding Flowchart

Step-by-step diagnostic chart to identify and resolve unit malfunctions.

Component Diagnosis and Testing

Compressor Resistance Testing

Methods and criteria for testing compressor resistance with a tester.

Fan Motor Resistance Testing

Methods and criteria for testing outdoor fan motor resistance.

Troubleshooting Specific Faults

Compressor and Fan Motor Stoppage

Troubleshooting flow for issues where compressor or fan motor does not stop.