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Mitsubishi Electric Mr.Slim MUZ-GC35NA - C2 User Manual

Mitsubishi Electric Mr.Slim MUZ-GC35NA - C2
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 - C2 Specifications

General IconGeneral
RefrigerantR410A
Indoor Unit Weight9 kg
Cooling Capacity12000 BTU/h
Coefficient of Performance (COP)3.5
Power Supply50 Hz
Outdoor Unit Dimensions (H x W x D)550 x 780 x 285 mm

Summary

PART NAMES AND FUNCTIONS

SPECIFICATION

OUTLINES AND DIMENSIONS

WIRING DIAGRAM

REFRIGERANT SYSTEM DIAGRAM

MAX. REFRIGERANT PIPING LENGTH and MAX. HEIGHT DIFFERENCE

ADDITIONAL REFRIGERANT CHARGE (R410A : g)

Details on calculating extra refrigerant charge based on piping length.

PERFORMANCE CURVES

CAPACITY AND INPUT CURVES

Graphs showing cooling capacity and total input under various conditions.

CAPACITY AND INPUT CORRECTION BY OPERATIONAL FREQUENCY OF COMPRESSOR

Correction factors for capacity and input based on compressor frequency.

TEST RUN OPERATION (How to operate fixed-frequency operation)

Procedure for testing the unit's operation at fixed frequencies.

OUTDOOR LOW PRESSURE AND OUTDOOR UNIT CURRENT

Charts showing outdoor low pressure and unit current under cooling operation.

HEAT operation

Performance data related to heating operation conditions.

ACTUATOR CONTROL

OUTDOOR FAN MOTOR CONTROL

How the outdoor fan motor operates in relation to the compressor.

R.V. COIL CONTROL

Operation of the reversing valve (4-way valve) for cooling and heating.

RELATION BETWEEN MAIN SENSOR AND ACTUATOR

Mapping of sensors to actuators for different models.

SERVICE FUNCTIONS

CHANGE IN DEFROST SETTING

How to adjust the defrost finish temperature using jumper wires.

PRE-HEAT CONTROL SETTING

Procedure to activate pre-heat control for low-temperature operation.

TROUBLESHOOTING

CAUTIONS ON TROUBLESHOOTING

Important safety and preparatory steps before troubleshooting.

FAILURE MODE RECALL FUNCTION

How to retrieve stored error codes from the unit's memory.

Outdoor unit failure mode table

Table listing outdoor unit failure modes, LED indications, and causes.

TROUBLESHOOTING CHECK TABLE

Table correlating symptoms, LED indications, and troubleshooting steps.

TROUBLE CRITERION OF MAIN PARTS

Methods and criteria for checking key components like thermistors and motors.

TROUBLESHOOTING FLOW

Step-by-step diagnostic guides for components: compressor, power supply, motors, thermistors, HPS, LEV, P.C. boards, and wiring.

TEST POINT DIAGRAM AND VOLTAGE

Inverter P.C. board

Diagram showing test points and voltage measurements on the inverter board.

Outdoor electronic control P.C. board

Diagram showing test points and component locations on the control board.

Noise filter P.C. board

Diagram showing components and connections on the noise filter board.

Outdoor power board

Diagram showing components and connections on the outdoor power board.

DISASSEMBLY INSTRUCTIONS

MUZ-GC25NA MUZ-GC35NA

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

MUZ-GC50NA MUZ-GC60NA MUZ-GC71NA

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

Removing the inverter assembly, inverter P.C. board and power board

Detailed procedure for removing the inverter and power boards.

Removing the compressor and 4-way valve

Steps for safely removing the compressor and 4-way valve.

Electromagnetic noise enters into TV sets or radios

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