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Mitsubishi Electric Mr.Slim MUZ-GC71NA - C1 User Manual

Mitsubishi Electric Mr.Slim MUZ-GC71NA - C1
64 pages
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SERVICE MANUAL
CONTENTS
1. PART NAMES AND FUNCTIONS· ···················· 3
2. SPECIFICATION ················································ 4
3. OUTLINES AND DIMENSIONS ························ 8
4. WIRING DIAGRAM ············································ 9
5. REFRIGERANT SYSTEM DIAGRAM ············· 14
6. PERFORMANCE CURVES ····························· 18
7. ACTUATOR CONTROL ··································· 23
8. SERVICE FUNCTIONS ··································· 24
9. TROUBLESHOOTING ····································· 24
10. DISASSEMBLY INSTRUCTIONS ···················· 54
Models
SPLIT-TYPE AIR CONDITIONERS
MUZ-GC25NA -
C1
MUZ-GC35NA -
C1
MUZ-GC35NA -
C2
MUZ-GC50NA -
C1
MUZ-GC50NA -
C2
MUZ-GC60NA -
C1
MUZ-GC60NA -
C2
MUZ-GC71NA -
C1
NOTE:
RoHS compliant products have <G> mark on the spec name plate.
HFC
utilized
R410A
No. OBH482
REVISED EDITION-C
OUTDOOR UNIT
Indoor unit service manual
MSZ-GC•NA Series (OBH481)
MUZ-GC25/35NA
PARTS CATALOG (OBB482)
Please void OBH482 REVISED EDITION-B.
Revision C:
MUZ-GC35NA -
C2
has been added.

Table of Contents

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Mitsubishi Electric Mr.Slim MUZ-GC71NA - C1 Specifications

General IconGeneral
BrandMitsubishi Electric
ModelMr.Slim MUZ-GC71NA - C1
CategoryAir Conditioner
LanguageEnglish

Summary

Outdoor Unit Service Manual

Part Names and Functions

Specification

Outlines and Dimensions

Wiring Diagram

Refrigerant System Diagram

Performance Curves

Capacity and Input Curves

Displays cooling and heating capacity/input based on operating temperatures.

Compressor Frequency Corrections

Shows how compressor frequency affects capacity and input.

Test Run Operation

Describes the procedure for performing a fixed-frequency test run.

Low Pressure & Unit Current

Graphs outdoor low pressure and unit current against ambient conditions.

Heat Operation Performance

Presents performance data specifically for heating operation.

Actuator Control

Outdoor Fan Motor Control

Details the ON/OFF logic for the outdoor fan motor.

R.V. Coil Control

Describes the control sequence for the 4-way reversing valve.

Sensor to Actuator Relation

Maps sensors to their corresponding actuators and control purposes.

Service Functions

Defrost Setting Change

Explains how to modify the defrost finish temperature.

Pre-Heat Control Setting

Details the activation of pre-heat control for compressor protection.

Troubleshooting

Troubleshooting Cautions

Provides essential safety and procedural advice before troubleshooting.

Failure Mode Recall Function

Explains how to retrieve stored failure codes from the unit.

Outdoor Unit Failure Mode Table

Lists failure modes, LED indications, conditions, and correspondences.

Troubleshooting Flowcharts and Checks

Guides diagnosing component and system issues via flowcharts and checks.

Test Point Diagram and Voltage

Inverter P.C. Board Test Points

Identifies test points and voltage readings on the inverter board.

Outdoor Electronic Control P.C. Board

Locates components and test points on the outdoor control board.

Noise Filter P.C. Board

Shows component layout and connections for the noise filter.

Outdoor Power Board

Details components and connections on the outdoor power supply board.

Disassembly Instructions

MUZ-GC25NA/35NA Disassembly Steps

Guides the disassembly process for specific models.

MUZ-GC50NA/60NA/71NA Disassembly Steps

Guides the disassembly process for other models.

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