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Mitsubishi Electric MUZ-GS18NA User Manual

Mitsubishi Electric MUZ-GS18NA
110 pages
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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
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Mitsubishi Electric MUZ-GS18NA Specifications

General IconGeneral
CategoryAir Conditioner
ModelMUZ-GS18NA
Cooling Capacity18000 BTU/h
Heating Capacity20000 BTU/h
RefrigerantR410A
Operating Temperature (Cooling)14°F to 115°F
Operating Temperature (Heating)-13°F to 75°F
TypeMini-Split
Heating Seasonal Performance Factor (HSPF)10.0
Power Supply208/230V, 1 Phase, 60Hz

Summary

1 TECHNICAL CHANGES

2 PART NAMES AND FUNCTIONS

3 SPECIFICATION

4 OUTLINES AND DIMENSIONS

5 WIRING DIAGRAM

6 REFRIGERANT SYSTEM DIAGRAM

7-5. CAPACITY AND INPUT CORRECTION BY INVERTER OUTPUT FREQUENCY

7-6. HOW TO OPERATE FIXED-FREQUENCY OPERATION (Test run operation)

9 SERVICE FUNCTIONS

10 TROUBLESHOOTING

10-1. CAUTIONS ON TROUBLESHOOTING

Important safety precautions and checks before starting troubleshooting.

10-2. FAILURE MODE RECALL FUNCTION

Procedure for recalling memorized abnormal conditions from the indoor/outdoor unit.

2. Flow chart of the detailed outdoor unit failure mode recall function

Detailed flowchart for recalling outdoor unit failure modes.

3. Table of outdoor unit failure mode recall function

Table mapping LED indications to abnormal points and remedies for outdoor units.

10-3. TROUBLESHOOTING CHECK TABLE

Comprehensive table of symptoms, LED indications, abnormal points, and remedies.

10-4. TROUBLESHOOTING CRITERION OF MAIN PARTS

10-5. TROUBLESHOOTING FLOW

A How to check inverter/compressor

Flowchart for diagnosing issues with the inverter and compressor.

B Check of open phase

Procedure to check the inverter's phase balance.

C Check of compressor

Steps to check compressor operation and winding.

D Check of compressor winding

Method to check compressor winding resistance.

E Check of compressor operation time

Procedure to measure compressor operation duration.

F Check of compressor start failure

Diagnostic steps for compressor start failure issues.

M How to check miswiring and serial signal error

Guide for identifying and resolving miswiring and serial signal errors.

11 DISASSEMBLY INSTRUCTIONS

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