Table of Contents
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SPLIT-TYPE, AIR CONDITIONER
SERVICE MANUAL
Multi system type
Models
MUX-2A28VB -
MUX-2A59VB -
MUX-3A60VB -
MUX-3A63VB -
MUX-2A70VB -
MUX-4A73VB -
NOTE:
•As for indoor unit MSC-CA20VB -
or MSC-CA35VB -
, refer to the service manual OB393.
E1
•This manual describes technical data of outdoor unit.
•As for indoor unit MSC-GA20VB -
or MSC-GA35VB -
, refer to the service manual OB385.
E1
E1
E1
E1
E1
E1
E1
CONTENTS
MUX-2A59VB -
E1
MUX-3A60VB -
E1
MUX-3A63VB -
E1
MUX-2A70VB -
E1
Indication of
model name
10. ACTUATOR CONTROL····································55
11. TROUBLESHOOTING ······································56
12. DISASSEMBLY INSTRUCTIONS·····················63
, MSC-CA25VB -
E1
E1
13. PARTS LIST······················································68
, MSC-GA25VB -
E1
E1
HFC
utilized
R410A
1. TECHNICAL CHANGES ····································2
2. PART NAMES AND FUNCTIONS······················6
CORRESPONDENCE TABLE ···························6
4. SPECIFICATION·················································7
5. NOISE CRITERIA CURVES ·····························12
6. OUTLINES AND DIMENSIONS ······················ 13
7. WIRING DIAGRAM ··········································16
8. REFRIGERANT SYSTEM DIAGRAM ··············21
9. PERFORMANCE CURVES ······························32
No. OB384
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Table of Contents
Troubleshooting
Related Manuals for Mitsubishi MUX-3A63VB
Summarization of Contents
Mitsubishi Electric Air Conditioner Technical Changes
Capacity Indication Update
Details the change in capacity indication from BTU to kW for specific models.
Stop Valve Specification Update
Describes the modification in the size of the stop valve for gas piping.
Mitsubishi Air Conditioner Part Identification
Outdoor Unit Component Identification
Diagrams labeling key parts of the outdoor unit such as air inlet/outlet, piping, and drain hose.
Air Conditioner Noise Criteria Curves
Noise Level Graphs by Frequency
Presents octave band sound pressure levels against band center frequencies for various models.
Mitsubishi Air Conditioner Dimensions and Clearance
MUX-2A28VB & MUX-2A59VB Unit Dimensions
Provides physical dimensions and installation space requirements for MUX-2A28VB and MUX-2A59VB.
MUX-3A60VB, MUX-3A63VB & MUX-2A70VB Unit Dimensions
Details physical dimensions and installation clearances for MUX-3A60VB, MUX-3A63VB, and MUX-2A70VB.
MUX-4A73VB Outdoor Unit Dimensions
Shows the physical size and required installation space for the MUX-4A73VB outdoor unit.
Mitsubishi Air Conditioner Wiring Diagrams
MUX-2A28VB Outdoor Unit Wiring
Illustrates the electrical connections for the MUX-2A28VB outdoor unit.
MUX-2A59VB & MUX-2A70VB Wiring Diagrams
Shows electrical connections for MUX-2A59VB and MUX-2A70VB outdoor units.
MUX-3A60VB Outdoor Unit Wiring
Details the electrical wiring for the MUX-3A60VB outdoor unit.
MUX-3A63VB Outdoor Unit Wiring
Illustrates the electrical layout for the MUX-3A63VB outdoor unit.
MUX-4A73VB Outdoor Unit Wiring
Shows the electrical circuit diagram for the MUX-4A73VB outdoor unit.
Refrigerant System and Piping Information
Unit A & B Refrigerant Flow Diagram
Illustrates the refrigerant circuit for indoor units A and B.
Refrigerant Piping Specifications
Provides details on pipe diameter, thickness, and insulation material.
Air Conditioner Performance Curves Overview
Guaranteed Voltage and Airflow Settings
Specifies the operational voltage range and recommended airflow settings.
Indoor Air Temperature Measurement Guide
Explains the procedure for measuring indoor air wet-bulb and dry-bulb temperatures.
Capacity and Input Data Curves
Presents charts showing capacity and input power versus temperature and humidity.
Outdoor Pressure and Current Curves
Displays outdoor low pressure and unit current characteristics based on ambient conditions.
Air Conditioner Actuator Control
Outdoor Unit Actuator Operation States
Details ON/OFF states of actuators for compressor, fan motor, and solenoid valves.
Air Conditioner Troubleshooting Guide
Cautions and General Procedures
Outlines safety precautions and initial checks before diagnosing operational issues.
Diagnostic Flowcharts for Operation Issues
Provides step-by-step diagnostic guides for common operational failures.
Trouble Criteria for Key Components
Lists resistance values and criteria for compressor, fan motor, and solenoid coils.
Troubleshooting Specific Failures
Guides for diagnosing compressor/fan motor issues, cooling problems, and test point checks.
Air Conditioner Disassembly Instructions
Terminal Detaching Methods
Explains how to detach terminals with and without locking mechanisms.
MUX-2A28VB Cabinet Removal Procedure
Step-by-step guide to remove the outer cabinet of the MUX-2A28VB.
MUX-2A28VB Component Removal Steps
Details on removing the relay panel, propeller, fan motor, and compressor.
Cabinet Removal for Multi-Split Models
Instructions for removing the cabinet for specific multi-split models.
Component Removal for Multi-Split Models
Steps for removing the relay panel, propeller, and outdoor fan motor.
Compressor Removal Procedures
Step-by-step instructions for removing the compressor for different models.
Mitsubishi Air Conditioner Parts List
MUX-2A28VB Outdoor Structural Parts
Lists structural components of the MUX-2A28VB outdoor unit with part numbers.
MUX-2A28VB Electrical and Functional Parts
Lists electrical components and their part numbers for MUX-2A28VB.
Structural Parts for MUX-2A59VB to MUX-4A73VB
Lists structural components for MUX-2A59VB, MUX-3A60VB, MUX-3A63VB, MUX-2A70VB, MUX-4A73VB.
Detailed Structural Parts List
Detailed list of structural components and their part numbers.
Functional and Electrical Parts for Multi-Split
Lists electrical and functional components for MUX-2A59VB to MUX-4A73VB.
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