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Mitsubishi Electric MUH-A07WV User Manual

Mitsubishi Electric MUH-A07WV
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 MUH-A07WV Specifications

General IconGeneral
BrandMitsubishi Electric
ModelMUH-A07WV
CategoryAir Conditioner
LanguageEnglish

Summary

1 TECHNICAL CHANGES

2 PART NAMES AND FUNCTIONS

3 INDOOR/OUTDOOR CORRESPONDENCE TABLE

4 INDOOR UNITS COMBINATION

5 SPECIFICATION

INFORMATION FOR THE AIR CONDITIONER WITH R410A REFRIGERANT

6 NOISE CRITERIA CURVES

7 OUTLINES AND DIMENSIONS

8 WIRING DIAGRAM

9 REFRIGERANT SYSTEM DIAGRAM

MAX. REFRIGERANT PIPING LENGTH

ADDITIONAL REFRIGERANT CHARGE(R410A : g)

PIPING PREPARATION

10 PERFORMANCE CURVES

10-1.CAPACITY AND THE INPUT CURVES

Shows cooling capacity and total input curves based on indoor/outdoor conditions.

10-2.OUTDOOR LOW PRESSURE AND OUTDOOR UNIT CURRENT

Illustrates outdoor low pressure and current curves for COOL operation.

10-3.CAPACITY AND THE INPUT CURVES

Displays capacity and input curves for single indoor unit operations.

10-4.OUTDOOR LOW PRESSURE AND OUTDOOR UNIT CURRENT

Shows pressure and current curves for COOL operation of MUX models.

10-5. CAPACITY AND THE INPUT CURVES

Provides capacity and input curves for MUX-A20/A25/A26WV and MXZ-A18WV models.

10-6. Capacity and input correction by inverter output frequency

Shows how capacity and input change with inverter frequency.

10-7. Outdoor low pressure and outdoor unit current

Details pressure and current curves for 07-class units in COOL and HEAT operation.

11 MICROPROCESSOR CONTROL

INDOOR UNIT DISPLAY & REMOTE CONTROLLER

Details the operation indicator lamp and names the remote controller buttons/sections.

11-1. COOL OPERATION

Describes how to operate the unit in COOL mode using the remote or switches.

11-5. “I FEEL CONTROL” OPERATION

Details the "I FEEL CONTROL" mode operation and set temperature determination.

11-8. TIMER OPERATION

Explains how to set and use the timer functions for operation scheduling.

11-9. EMERGENCY-TEST OPERATION

Describes how to use the emergency operation switch for testing and service.

11-10. OUTDOOR UNIT ACTUATOR CONTROL

Details the ON/OFF states of various actuators in the outdoor unit for different models.

11-11 INVERTER CONTROL SYSTEMS

Explains the control logic for inverter multi-system and power supply circuits.

11-12. Optimal voltage control

Explains how to achieve optimal voltage for compressor efficiency.

11-13 LEV control

Details the control mechanism and LEV opening adjustments based on operating conditions.

11-14.Operational frequency range

Provides the operational frequency ranges for various modes and unit combinations.

11-15.Heat defrosting control

Explains the conditions and process for heat defrosting.

11-16.Discharge temperature protection control

Describes the compressor protection mechanism based on discharge temperature.

12 SERVICE FUNCTIONS

12-1. COMPULSORY DEFROSTING MODE FOR SERVICE

Describes how to manually initiate defrosting for service purposes.

12-2. CHANGE IN DEFROST SETTING

Explains how to adjust defrost interval time and start temperature.

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

Covers switching between MU/MUX and MUH/MXZ types and enabling auto-restart.

13 TROUBLESHOOTING

13-1. Cautions on troubleshooting

Lists important precautions to follow before and during troubleshooting.

13-2. Instruction of troubleshooting

A flowchart to guide troubleshooting based on observed symptoms.

13-3. Troubleshooting check table

Correlates abnormal points with symptoms, detection methods, and check points.

13-4. Trouble criterion of main parts

Provides normal resistance/voltage values for key components to diagnose faults.

14 DISASSEMBLY INSTRUCTIONS

14-1. INDOOR UNIT

Procedures for disassembling the indoor unit, including panel, P.C. board, and motors.

14-2. OUTDOOR UNIT (MU-A07WV/MU-A09WV/MU-A12WV)

Procedures for disassembling outdoor units, including cabinet and electrical parts.

14-3. OUTDOOR UNIT (MUH-A07WV/MUH-A09WV/MUH-A12WV)

Procedures for disassembling MUH outdoor units, including cabinet and deicer P.C. board.

14-5. OUTDOOR UNIT (MUX-A19WV/MUX-A20WV/MUX-A25WV/MUX-A26WV)

Procedures for disassembling MUX outdoor units, including cabinet, relay panel, and fan motor.

14-6. MXZ-A18WV - OUTDOOR UNIT

Procedures for disassembling the MXZ-A18WV outdoor unit, including cabinet, inverter, and P.C. boards.

15 PARTS LIST

15-1. INDOOR UNIT STRUCTURAL PARTS

Lists structural parts for indoor units.

15-2. ACCESSORY AND REMOTE CONTROLLER

Lists accessories and remote controller parts.

15-3. INDOOR UNIT ELECTRICAL PARTS AND FUNCTIONAL PARTS

Lists electrical parts and functional components for indoor units.

15-5. OUTDOOR UNIT STRUCTURAL PARTS

Lists structural parts for MU outdoor units.

15-6. OUTDOOR UNIT ELECTRICAL PARTS AND FUNCTIONAL PARTS

Lists electrical parts and functional components for MU outdoor units.

15-10. OUTDOOR UNIT STRUCTURAL PARTS

Lists structural parts for MUX-A10WV outdoor unit.

15-13. OUTDOOR UNIT FUNCTIONAL PARTS AND ELECTRICAL PARTS

Lists electrical and functional parts for MUX outdoor units.

MXZ-A18WV - 15-14. OUTDOOR UNIT FUNCTIONAL PARTS AND ELECTRICAL PARTS

Lists electrical and functional parts for the MXZ-A18WV outdoor unit.

16 OPTIONAL PARTS

15-17. AIR CLEANING FILTER

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

15-18. DEODORIZING FILTER

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

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