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Mitsubishi Electric Mr.Slim MUZ-GC35NA - C1 User Manual

Mitsubishi Electric Mr.Slim MUZ-GC35NA - 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-GC35NA - C1 Specifications

General IconGeneral
BrandMitsubishi Electric
ModelMr.Slim MUZ-GC35NA - C1
CategoryAir Conditioner
LanguageEnglish

Summary

Part Names and Functions

Specifications

Main Electric Parts Specifications

Details main electric parts, their specifications, and rating conditions.

Outlines and Dimensions

Installation Required Space

Specifies minimum clearances needed around the outdoor unit for proper operation.

Wiring Diagrams

Wiring Diagram: MUZ-GC25NA/MUZ-GC35NA

Electrical wiring schematic for MUZ-GC25NA and MUZ-GC35NA models.

Wiring Diagram: MUZ-GC50NA/MUZ-GC60NA

Electrical wiring schematic for MUZ-GC50NA and MUZ-GC60NA models.

Wiring Diagram: MUZ-GC50NA-C2

Electrical wiring schematic for MUZ-GC50NA-C2 model.

Wiring Diagram: MUZ-GC60NA-C2

Electrical wiring schematic for MUZ-GC60NA-C2 model.

Wiring Diagram: MUZ-GC71NA

Electrical wiring schematic for MUZ-GC71NA model.

Refrigerant System Diagrams

Refrigerant Diagram: MUZ-GC25NA/MUZ-GC35NA

Illustrates the refrigerant flow and components for MUZ-GC25NA/35NA.

Refrigerant Diagram: MUZ-GC50NA-C1

Illustrates the refrigerant flow and components for MUZ-GC50NA-C1.

Refrigerant Diagram: MUZ-GC50NA-C2

Illustrates the refrigerant flow and components for MUZ-GC50NA-C2.

Refrigerant Diagram: MUZ-GC60NA-C1

Illustrates the refrigerant flow and components for MUZ-GC60NA-C1.

Refrigerant Diagram: MUZ-GC60NA-C2

Illustrates the refrigerant flow and components for MUZ-GC60NA-C2.

Refrigerant Diagram: MUZ-GC71NA

Illustrates the refrigerant flow and components for MUZ-GC71NA.

Max Refrigerant Piping Length and Height Difference

Additional Refrigerant Charge Calculation

Provides guidelines for calculating extra refrigerant charge.

Performance Curves

Capacity and Input Performance Curves

Shows cooling capacity and total input across various conditions.

Compressor Frequency Capacity/Input Correction

Details how compressor frequency affects capacity and input.

Test Run Operation Procedure

Instructions on how to perform a fixed-frequency test run operation.

Outdoor Pressure and Current Curves

Plots low pressure and unit current against ambient conditions.

Heat Operation Performance Data

Presents performance data for heating operation.

Actuator Control Systems

Outdoor Fan Motor Control

Describes the ON/OFF timing and interlocking of the outdoor fan motor.

Reversing Valve (R.V.) Coil Control

Explains the control logic for the 4-way reversing valve.

Sensor-to-Actuator Mapping

Maps sensors to their corresponding actuators and functions.

Service Functions and Settings

Defrost Setting Adjustment

Details how to change the defrost finish temperature.

Pre-Heat Control Setup

Explains how to activate pre-heat control for low temperatures.

Troubleshooting Procedures

Troubleshooting Safety Precautions

Important safety and preparatory steps before troubleshooting.

Failure Mode Recall Functionality

Procedure to recall and check memorized failure modes.

Outdoor Unit Failure Recall Flowchart

Step-by-step flowchart for detailed outdoor unit failure recall.

Outdoor Unit Failure Mode Table

Lists outdoor unit symptoms, LED indications, and causes.

Troubleshooting Symptom Check Table

Symptom-based check table for troubleshooting.

Inverter and Compressor Troubleshooting Flowcharts

Diagnostic flowcharts for inverter and compressor issues.

Open Phase Diagnosis

Steps to check for open phase faults in the inverter system.

Compressor Diagnostics

Steps to check compressor operation and winding.

Compressor Operation Time Analysis

How to measure compressor operation time before overcurrent stop.

Compressor Start Failure Troubleshooting

Procedure to diagnose and resolve compressor start failures.

Outdoor Thermistor Testing

Method to test defrost, discharge, ambient, and heat exchanger thermistors.

Reversing Valve (R.V.) Coil Testing

Steps to check the functionality of the R.V. coil.

Outdoor Fan Motor Testing

Diagnostic steps for the outdoor fan motor.

Power Supply Verification

Verifies the input voltage and internal power supply.

Expansion Valve (LEV) Testing

Procedure to test the expansion valve operation and resistance.

Inverter P.C. Board Diagnostics

Diagnostic steps for the inverter P.C. board.

Miswiring and Serial Signal Error Troubleshooting

Identifies and resolves miswiring and serial communication errors.

High Pressure Switch (HPS) Testing

Procedure to test the high-pressure switch functionality.

Electromagnetic Noise Troubleshooting

Addresses issues of electromagnetic noise affecting TVs or radios.

Test Point Diagrams and Voltage Specifications

Inverter P.C. Board Test Points

Identifies test points and voltage readings on the inverter P.C. board.

Outdoor Control Board Test Points

Pin assignments and test points for the outdoor control board.

Noise Filter Board Layout

Diagram showing the layout of the noise filter P.C. board.

Outdoor Power Board Layout

Diagram showing the layout and connections on the outdoor power board.

Disassembly Procedures

Disassembly: MUZ-GC25NA/MUZ-GC35NA

Step-by-step guide for removing panels and components.

Disassembly: MUZ-GC50NA/MUZ-GC60NA/MUZ-GC71NA

Step-by-step guide for removing panels and components for larger models.

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