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Mitsubishi Electric MUX-A25WV User Manual

Mitsubishi Electric MUX-A25WV
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SERVICE MANUAL
CONTENTS
1. TECHNICAL CHANGES ····································2
2. PART NAMES AND FUNCTIONS······················6
3. INDOOR/OUTDOOR
CORRESPONDENCE TABLE ···························8
4. INDOOR UNITS COMBINATION ·······················9
5. SPECIFICATION···············································10
6. NOISE CRITERIA CURVES···························· 17
7. OUTLINES AND DIMENSIONS ······················ 20
8. WIRING DIAGRAM ··········································25
9. REFRIGERANT SYSTEM DIAGRAM··············32
10. PERFORMANCE CURVES······························45
11. MICROPROCESSOR CONTROL·····················84
12. SERVICE FUNCTIONS···································102
13. TROUBLESHOOTING····································104
14. DISASSEMBLY INSTRUCTIONS···················129
15. PARTS LIST····················································144
16. OPTIONAL PARTS·········································157
Wireless type
Models
MSC-A07WV -
(
WH
)
· MU-A07WV -
MSC-A09WV -
(
WH
)
· MU-A09WV -
MSC-A12WV -
(
WH
)
· MU-A12WV -
MSC-A07WV -
(
WH
)
· MUH-A07WV -
MSC-A09WV -
(
WH
)
· MUH-A09WV -
MSC-A12WV -
(
WH
)
· MUH-A12WV -
Multi system type
Models
MSC-A07WV -
(
WH
)
· MUX-A10WV -
MSC-A09WV -
(
WH
)
· MUX-A19WV -
MSC-A12WV -
(
WH
)
· MUX-A20WV -
· MUX-A25WV -
· MUX-A26WV -
Inverter-controlled multi system Model
· MXZ-A18WV -
E1
E1
E1
E1E1
E1E1
E1E1
E1E1
E1E1
E1E1
E1E1
E1E1
E1E1
MSC-A07WV -
MSC-A09WV -
MSC-A12WV -
E1
E1
E1
No. OB307
REVISED EDITION-A
HFC
utilized
R410A
SPLIT-TYPE, AIR CONDITIONERS
SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS
Revision:
MXZ-A18WV - have been added.
MSC-A07/09/12WV - Part No.
.
have changed.
VARISTOR (NR11& NR12)
E02 336 385 E02 749 385
Please void OB307.
E1
E1
Indication of
model name
Remote
controller
OB307A1.qxp 03.2.19 3:56 PM Page 1
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Mitsubishi Electric MUX-A25WV Specifications

General IconGeneral
BrandMitsubishi Electric
ModelMUX-A25WV
CategoryAir Conditioner
LanguageEnglish

Summary

1 TECHNICAL CHANGES

INFORMATION FOR THE AIR CONDITIONER WITH R410A REFRIGERANT

2.Refrigerant piping

Refrigerant Piping Specifications

Specifies requirements for refrigerant pipes, including material and thickness.

R410A Refrigerant Handling and Charging

Covers air purging and additional refrigerant charging procedures for R410A.

2 PART NAMES AND FUNCTIONS

Indoor Unit Components

Identifies components of the indoor unit, including filters, vanes, and panels.

Outdoor Unit Components

Identifies components of the outdoor unit, including air inlet, outlet, and piping.

Accessories

Lists included accessories for indoor and outdoor units, such as installation plates and remote controllers.

REMOTE CONTROLLER

4 INDOOR UNITS COMBINATION

5 SPECIFICATION

Indoor Model Specifications

Details specifications for indoor units (MSC-A07WV, MSC-A09WV, MSC-A12WV).

Outdoor Model Specifications

Details specifications for outdoor units (MU-A07WV, MU-A09WV, MU-A12WV).

6 NOISE CRITERIA CURVES

Noise Curves for Various Models

Presents noise criteria curves for different indoor and outdoor unit models.

7 OUTLINES AND DIMENSIONS

Indoor Unit Dimensions

Provides dimensions and installation details for indoor units (MSC-A07WV, MSC-A09WV, MSC-A12WV).

Outdoor Unit Dimensions and Space Requirements

Shows dimensions and required space for outdoor units (MU, MUX, MXZ series).

8 WIRING DIAGRAM

Indoor Unit Wiring Diagrams

Shows the electrical wiring diagrams for MSC series indoor units.

Outdoor Unit Wiring Diagrams

Electrical wiring diagrams for MU, MUH, MUX, and MXZ series outdoor units.

9 REFRIGERANT SYSTEM DIAGRAM

Refrigerant Flow for MU Series

Diagram showing refrigerant flow for MU indoor units with MSC/MUH outdoor units.

Refrigerant Flow for MUH Series

Diagram showing refrigerant flow for MUH indoor/outdoor units.

MAX. REFRIGERANT PIPING LENGTH

Refrigerant Pipe Length and Height Difference Limits

Specifies maximum piping length and height difference for various models.

Additional Refrigerant Charge

Details additional refrigerant charge required based on piping length.

10 PERFORMANCE CURVES

Capacity and Input Curves (Single Unit Operation)

Presents curves showing capacity and input vs. temperature and humidity for various models.

Outdoor Unit Performance (Low Pressure and Current)

Graphs showing outdoor low pressure and current based on ambient conditions.

MXZ-A18WV Performance Data

Performance data including capacity and input correction by inverter frequency for MXZ-A18WV.

11 MICROPROCESSOR CONTROL

Indoor Unit Display and Remote Controller Operation

Explains the operation indicator lamp and remote controller functions for COOL mode.

DRY and HEAT Operation Modes

Details operation procedures for DRY and HEAT modes, including fan and compressor control.

FAN Motor and Vane Control

Explains fan motor control logic and auto vane operation.

Timer and Emergency Operations

Instructions for timer operations and emergency/test run procedures.

11-10. OUTDOOR UNIT ACTUATOR CONTROL

11-11 INVERTER MULTI SYSTEM CONTROL

Main Power Supply Circuit

Explains the components and function of the main power supply circuit for the inverter system.

Optimal Voltage and LEV Control

Details optimal voltage control and LEV opening correction methods.

12 SERVICE FUNCTIONS

Compulsory Defrosting and Setting Changes

Procedures for compulsory defrosting and modifying defrost settings.

Timer Short Mode and PC Board Modification

Describes timer shortening for service and PC board modification for individual operation.

Remote Controller and Switch Settings

Details how to set remote controller type and switch over MU/MUX and MUH/MXZ types.

13 TROUBLESHOOTING

Troubleshooting Cautions and Procedures

Important precautions and a general procedure for troubleshooting.

Troubleshooting Flowcharts and Check Tables

Flowcharts and tables for diagnosing and resolving operational issues.

MXZ-A18WV Troubleshooting Flowchart

Flowchart for diagnosing MXZ-A18WV operational problems based on LED indicators and symptoms.

Component Troubleshooting Criteria

Lists criteria for checking main components like thermistors, motors, and solenoids.

14 DISASSEMBLY INSTRUCTIONS

Indoor Unit Disassembly

Step-by-step instructions for disassembling the indoor unit.

Outdoor Unit Disassembly (MU Series)

Instructions for disassembling MU series outdoor units.

Outdoor Unit Disassembly (MUH Series)

Instructions for disassembling MUH series outdoor units.

Outdoor Unit Disassembly (MUX Series)

Instructions for disassembling MUX series outdoor units.

Outdoor Unit Disassembly (MXZ-A18WV)

Instructions for disassembling the MXZ-A18WV outdoor unit.

15 PARTS LIST

Indoor Unit Parts

Lists structural parts for indoor units (MSC series).

Outdoor Unit Parts

Lists structural parts for MU series outdoor units.

Outdoor Unit Electrical Parts

Lists electrical and functional parts for MUH series outdoor units.

15-17. AIR CLEANING FILTER

Maintenance and Replacement

Information on the air cleaning filter, its maintenance, and replacement.

15-18. DEODORIZING FILTER

Cleaning and Replacement

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

16 OPTIONAL PARTS

Different-diameter Pipe Specifications

Details specifications for different-diameter pipes used for connecting units.

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