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Mitsubishi Electric MUX-A26WV User Manual

Mitsubishi Electric MUX-A26WV
158 pages
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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-A26WV Specifications

General IconGeneral
ModelMUX-A26WV
Cooling Capacity2.6 kW
Heating Capacity3.2 kW
Power Supply220-240 V, 50 Hz
RefrigerantR410A
Indoor Unit Noise LevelVaries depending on the connected indoor unit model
Noise Level (Indoor Unit)Varies depending on the connected indoor unit model

Summary

TECHNICAL CHANGES

PART NAMES AND FUNCTIONS

INDOOR UNIT

Identifies and describes components of the indoor air conditioning unit.

OUTDOOR UNIT

Identifies and describes components of the outdoor air conditioning unit.

ACCESSORIES

Lists and illustrates included accessories like remote controllers and mounting hardware.

SPECIFICATION

Indoor model

Provides detailed technical specifications for the indoor units, including electrical and fan motor data.

Outdoor model

Provides detailed technical specifications for the outdoor units, including compressor and electrical data.

NOISE CRITERIA CURVES

MSC-A07WV - E1

Presents noise level data for the MSC-A07WV unit across different frequencies and conditions.

MSC-A09WV - E1

Presents noise level data for the MSC-A09WV unit across different frequencies and conditions.

MSC-A12WV - E1

Presents noise level data for the MSC-A12WV unit across different frequencies and conditions.

OUTLINES AND DIMENSIONS

INDOOR UNIT

Provides dimensional drawings and installation details for the indoor units.

OUTDOOR UNIT

Provides dimensional drawings and installation details for the outdoor units.

WIRING DIAGRAM

INDOOR UNIT

Illustrates the electrical wiring connections for the indoor unit.

OUTDOOR UNIT

Illustrates the electrical wiring connections for the outdoor unit.

REFRIGERANT SYSTEM DIAGRAM

PERFORMANCE CURVES

10-1.CAPACITY AND THE INPUT CURVES

Presents graphs showing cooling capacity and input power under various conditions.

10-2.OUTDOOR LOW PRESSURE AND OUTDOOR UNIT CURRENT

Shows graphs for outdoor low pressure and current based on ambient conditions.

10-3.CAPACITY AND THE INPUT CURVES (ONE INDOOR UNIT WITH ONE OUTDOOR UNIT)

Provides performance curves for single indoor and outdoor unit combinations.

10-5. CAPACITY AND THE INPUT CURVES

Displays performance curves for various unit combinations.

10-6. Capacity and input correction by inverter output frequency (OUTDOOR UNIT : MXZ-A18WV)

Explains capacity and input correction based on inverter frequency for MXZ-A18WV.

10-7. Outdoor low pressure and outdoor unit current 1. 07-class unit in single operation (OUTDOOR UNIT : MXZ-A18WV)

Details outdoor low pressure and current for 07-class MXZ-A18WV in COOL and HEAT modes.

MICROPROCESSOR CONTROL

WIRELESS REMOTE CONTROLLER

Explains the functions and operation of the wireless remote controller.

11-1. COOL ( ) OPERATION

Details the steps and controls for operating the unit in COOL mode.

11-2. DRY ( ) OPERATION

Details the steps and controls for operating the unit in DRY mode.

11-4. HEAT ( ) OPERATION

Details the steps and controls for operating the unit in HEAT mode.

11-5. “I FEEL CONTROL” ( ) OPERATION

Explains the smart operation mode that adjusts settings based on user preference and room temperature.

11-6. FAN MOTOR CONTROL

Describes fan motor control mechanisms including feedback and lock-up protection.

11-7. AUTO VANE OPERATION

Details the auto vane operation, including motor drive, positioning, and modes.

11-8. TIMER OPERATION

Explains how to set and cancel timers for unit operation.

11-9. EMERGENCY-TEST OPERATION

Guides on using the emergency operation switch for testing or emergency situations.

11-10. OUTDOOR UNIT ACTUATOR CONTROL

Details the control of outdoor unit actuators like compressors and solenoid valves.

11-11. INVERTER MULTI SYSTEM CONTROL MXZ-A18WV -

Explains the control system for the MXZ-A18WV inverter multi-system.

11-12. Optimal voltage control

Explains how optimal voltage control enhances compressor efficiency and performance.

11-13 LEV control

Details the control of the Linear Expansion Valve (LEV) based on various operating parameters.

11-15.Heat defrosting control

Explains the conditions and procedures for the heat defrosting control.

SERVICE FUNCTIONS

12-2. CHANGE IN DEFROST SETTING

Describes how to change defrost settings for specific MUH models using jumper wires.

12-4. P.C. BOARD MODIFICATION FOR INDIVIDUAL OPERATION

Details modifications to PC boards for individual indoor unit operation using remote controllers.

12-5. REMOTE CONTROLLER (How to set the type)

Explains how to set the remote controller type for compatibility with different AC systems.

12-6. MU & MUXTYPE/MUH & MXZ TYPE SWITCH OVER AND AUTO RESTART FUNCTION

Guides on switching unit types and enabling the auto restart function.

TROUBLESHOOTING

13-1. Cautions on troubleshooting

Provides essential safety precautions and checks before performing troubleshooting.

3. Troubleshooting procedure

Outlines the systematic steps for diagnosing and resolving operational issues.

13-2. Instruction of troubleshooting

Provides flowcharts and guidance for troubleshooting specific operational faults.

13-3. Troubleshooting check table

A table correlating abnormal symptoms with detection methods and check points for self-diagnosis.

13-4. Trouble criterion of main parts

Lists main parts, their check methods, criteria, and figures for troubleshooting component issues.

DISASSEMBLY INSTRUCTIONS

14-1. INDOOR UNIT

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

14-2. OUTDOOR UNIT

Step-by-step instructions for disassembling the outdoor unit cabinet and electrical parts.

14-3. OUTDOOR UNIT

Step-by-step instructions for disassembling the MUH outdoor unit cabinet and deicer P.C. board.

14-4. OUTDOOR UNIT

Step-by-step instructions for disassembling the MUX-A10WV outdoor unit cabinet and relay panel.

14-5. OUTDOOR UNIT

Step-by-step instructions for disassembling MUX outdoor units.

15-16. OUTDOOR UNIT FUNCTIONAL PARTS AND STRUCTURAL PARTS

Lists parts for MXZ-A18WV outdoor units, including functional and structural components.

PARTS LIST

15-1. INDOOR UNIT STRUCTURAL PARTS

Lists structural parts for indoor units with part numbers and quantities.

15-6. OUTDOOR UNIT ELECTRICAL PARTS AND FUNCTIONAL PARTS

Lists electrical and functional parts for MU outdoor units with part numbers.

15-14. OUTDOOR UNIT FUNCTIONAL PARTS AND ELECTRICAL PARTS

Lists functional and electrical parts for MXZ-A18WV outdoor units with part numbers.

OPTIONAL PARTS

16-1. Different-diameter pipe

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

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