Mitsubishi Electric MUZ-GS24NAHZ User Manual

PARTS CATALOG (OBB875)
CONTENTS
1. TECHNICAL CHANGES ······························2
2. PART NAMES AND FUNCTIONS ··················3
3. SPECIFICATION ········································4
4. OUTLINES AND DIMENSIONS ··················· 10
5. WIRING DIAGRAM ··································· 12
6. REFRIGERANT SYSTEM DIAGRAM ··········· 21
7. DATA ······················································26
8. ACTUATOR CONTROL ····························· 57
9. SERVICE FUNCTIONS ······························58
10. TROUBLESHOOTING ······························· 59
11. DISASSEMBLY INSTRUCTIONS ················· 87
HFC
utilized
R410A
OUTDOOR UNIT
SERVICE MANUAL
No. OBH875
REVISED EDITION-B
Indoor unit service manual
MSZ-GS•NA, MSY-GS•NA Series (OBH874)
OBH875 REVISED EDITION-A is void.
Revision B:
• MUZ-GS09/12/15/18/24NA -
U1
,
MUZ-GS09/12/15/18/24NAH -
U1
,
MUZ-GS09/12/15/18/24NAHZ -
U1
,
MUY-GS09/12/15/18/24NA -
U1
,
MUZ-GS30/36NA2 -
U1
, MUZ-GS30/36NAH2 -
U1
and MUY-GS30/36NA2 -
U1
have been added.
MUZ-GS18/24/30/36NA MUZ-GS18/24/30/36NAH
MUZ-GS18/24NAHZ MUY-GS18/24/30/36NA
MUZ-GS30/36NA2 MUZ-GS30/36NAH2
MUY-GS30/36NA2
Models
MUZ-GS09NA -
U1
MUZ-GS18NAH -
U1
MUY-GS09NA -
U1
MUZ-GS12NA -
U1
MUZ-GS24NAH -
U1
MUY-GS12NA -
U1
MUZ-GS15NA -
U1
MUZ-GS30NAH -
U1
MUY-GS15NA -
U1
MUZ-GS18NA -
U1
MUZ-GS30NAH2 -
U1
MUY-GS18NA -
U1
MUZ-GS24NA -
U1
MUZ-GS36NAH -
U1
MUY-GS24NA -
U1
MUZ-GS30NA -
U1
MUZ-GS36NAH2 -
U1
MUY-GS30NA -
U1
MUZ-GS30NA2 -
U1
MUZ-GS09NAHZ -
U1
MUY-GS30NA2 -
U1
MUZ-GS36NA -
U1
MUZ-GS12NAHZ -
U1
MUY-GS36NA -
U1
MUZ-GS36NA2 -
U1
MUZ-GS15NAHZ -
U1
MUY-GS36NA2 -
U1
MUZ-GS09NAH -
U1
MUZ-GS18NAHZ -
U1
MUZ-GS12NAH -
U1
MUZ-GS24NAHZ -
U1
MUZ-GS15NAH -
U1

Mitsubishi Electric MUZ-GS24NAHZ Specifications

General

Refrigerant	R410A
Indoor Unit Type	Wall-mounted
Voltage (V)	208/230 V
Operating Temperature (Cooling)	14°F to 115°F
Operating Temperature (Heating)	-13°F to 75°F
Heating Seasonal Performance Factor (HSPF)	10.0
Noise Level (Indoor)	48 dB(A) (High)
Noise Level (Outdoor)	53 dB(A)
Power Supply	1 Phase, 60 Hz

Summary

Specification

Wiring Diagram

Refrigerant System Diagram

Maximum Refrigerant Piping and Height Difference

Additional Refrigerant Charge

Data

7-5. Capacity and Input Correction by Inverter Output Frequency

Correction factors for capacity and input based on compressor frequency.

Actuator Control

Service Functions

Troubleshooting

10-2. Failure Mode Recall Function

Procedure to recall and display memorized abnormal conditions.

3. Table of Outdoor Unit Failure Mode Recall Function

Detailed table correlating failure modes with LED indications and remedies.

10-3. Troubleshooting Check Table

Table listing symptoms, LED indications, abnormal points, conditions, and remedies.

10-4. Troubleshooting Criterion of Main Parts

Resistance criteria for checking main components like thermistors and motors.

10-5. Troubleshooting Flow

Flowcharts for diagnosing specific component issues.

A How to Check Inverter/Compressor

Step-by-step guide to check the inverter and compressor functionality.

M How to Check Miswiring and Serial Signal Error

Guide to diagnose miswiring and serial signal communication errors.

O Check of Outdoor Refrigerant Circuit

Troubleshooting steps for issues with the outdoor refrigerant circuit.

10-6. Test Point Diagram and Voltage

Diagrams of the inverter P.C. board with test points and voltage references.

Disassembly Instructions

3. Removing the Inverter Assembly, Inverter P.C. Board and Fuse P.C. Board (Other Models)

Procedure to remove the inverter and fuse P.C. boards.

2. Removing the Inverter Assembly, Inverter P.C. Board and Fuse P.C. Board

Procedure to remove the inverter and fuse P.C. boards from the unit.

5. Removing the Compressor and 4-Way Valve

Procedure to remove the compressor and 4-way valve.