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Mitsubishi Electric MUX-20TV - E1 User Manual

Mitsubishi Electric MUX-20TV - E1
40 pages
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SERVICE MANUAL
SPLIT-TYPE,AIR CONDITIONERS
CONTENTS
1. TECHNICAL CHANGES ····································2
2. PART NAMES AND FUNCTIONS······················2
3. INDOOR/OUTDOOR
CORRESPONDENCE TABLE ···························3
4. SPECIFICATION·················································3
5. NOISE CRITERIA CURVES······························ 6
6. OUTLINES AND DIMENSIONS ························ 7
7. WIRING DIAGRAM ············································9
8. REFRIGERANT SYSTEM DIAGRAM··············10
9. PERFORMANCE CURVES······························14
10. TROUBLESHOOTING······································26
11. DISASSEMBLY INSTRUCTIONS·····················32
12. PARTS LIST······················································35
13. OPTIONAL PARTS···········································37
Multi system type
Models
MUX-19TV -
MUX-20TV -
MUX-25TV -
E1
E1
E1
No. OB284
MUX-19TV -
MUX-20TV -
MUX-25TV -
E1
E1
E1
This manual describes technical data of outdoor unit.
For indoor unit refer to the service manuals No.OB227 REVISED EDITION-B and OB252 REVISED EDITION-A of corre-
sponding models.
OB284-1.qxp 01.4.26 8:58 PM Page 1
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Mitsubishi Electric MUX-20TV - E1 Specifications

General IconGeneral
Cooling Capacity (BTU)20, 000 BTU
Cooling Capacity5.8 kW
RefrigerantR410A
Power Supply220-240V, 50Hz
Noise Level (Outdoor Unit)52 dB

Summary

Technical Changes

Part Names and Functions

Outdoor Unit Parts Identification

Identifies and illustrates the external parts of the outdoor unit.

Indoor/Outdoor Correspondence Table

Specifications

Outdoor Unit Specifications

Details electrical data, fan, compressor, and special remarks for outdoor units.

Outdoor Unit Power Supply Details

Specifies single phase, 230V, 50Hz power requirements for the outdoor unit.

Noise Criteria Curves

Noise Curves MUX-19TV/MUX-20TV

Presents octave band sound pressure levels for MUX-19TV and MUX-20TV models.

Noise Curves MUX-25TV

Presents octave band sound pressure levels for the MUX-25TV model.

Outlines and Dimensions

Dimensions MUX-19TV Outdoor Unit

Provides detailed dimensions and installation clearances for the MUX-19TV outdoor unit.

Dimensions MUX-20TV Outdoor Unit

Provides detailed dimensions and installation clearances for the MUX-20TV outdoor unit.

Wiring Diagrams

Wiring Diagram MUX-19TV/MUX-25TV

Illustrates the electrical connections for MUX-19TV and MUX-25TV outdoor units.

Wiring Diagram MUX-20TV

Illustrates the electrical connections for the MUX-20TV outdoor unit.

Refrigerant System Diagram

Refrigerant Diagram MUX-19TV with MSC-07/12RV

Shows refrigerant flow and components for MUX-19TV with specific indoor units.

Refrigerant Piping Limits

Details maximum allowed refrigerant pipe length and height difference.

Additional Refrigerant Charge

Provides data on additional refrigerant charge based on piping length.

Piping Preparation Specifications

Specifies pipe sizes, insulation thickness, and material for refrigerant lines.

Performance Curves

Capacity & Input Curves (Single Unit)

Shows cooling capacity and input power curves for single indoor/outdoor unit combinations.

Outdoor Low Pressure & Current Curves

Presents curves for outdoor low pressure and unit current under various conditions.

Troubleshooting Guide

Troubleshooting Precautions

Safety and preparatory checks before performing troubleshooting procedures.

Troubleshooting Flowcharts

Provides step-by-step diagnostic flowcharts for common operational issues.

Trouble Criteria for Main Parts

Lists criteria and methods for testing key components like compressors and fan motors.

Troubleshooting Indoor Fan Motor

Diagnoses and resolves issues when the indoor fan motor does not operate.

Troubleshooting Remote Controller Issues

Diagnoses problems with remote controller communication and receiver board.

Troubleshooting Indoor Control Board

Diagnoses issues when the unit does not respond to remote or emergency operations.

Troubleshooting Outdoor Unit Operation

Diagnoses why the compressor and outdoor fan are not operating.

Test Point Diagrams and Voltages

Provides diagrams of P.C. board test points and expected voltage readings.

Disassembly Instructions

Outdoor Unit Cabinet Removal

Step-by-step guide for removing the outer cabinet and panels of the outdoor unit.

Disassembling Outdoor Unit Components

Details removal procedures for relay panel, propeller, and outdoor fan motor.

Compressor Removal Procedures

Step-by-step instructions for removing the compressor from the outdoor unit.

Parts List

Outdoor Unit Functional & Electrical Parts

Lists functional and electrical components for outdoor units with part numbers.

Outdoor Unit Structural Parts

Lists structural components of the outdoor unit with part numbers and quantities.

Optional Parts

Air Cleaning Filter

Information on the air cleaning filter, its function, life, and maintenance.

Deodorizing Filter

Information on the deodorizing filter, its function, cleaning, and replacement.

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