Mitsubishi Electric MSC-A09YV-E1 - User Manual

SERVICE MANUAL
CONTENTS
1. TECHNICAL CHANGES ····································3
2. PART NAMES AND FUNCTIONS······················3
3. SPECIFICATION·················································5
4. NOISE CRITERIA CURVES·······························6
5. OUTLINES AND DIMENSIONS ·························7
6. WIRING DIAGRAM ············································8
7. REFRIGERANT SYSTEM DIAGRAM················8
8. MICROPROCESSOR CONTROL ······················9
9. SERVICE FUNCTIONS ····································17
10. TROUBLESHOOTING······································19
11. DISASSEMBLY INSTRUCTIONS·····················26
12. PARTS LIST······················································28
Wireless type
Models
MSC-A07YV -
(WH)
MSC-A09YV -
(WH)
MSC-A12YV -
(WH)
E1
E1
E1
MSC-A07YV -
MSC-A09YV -
MSC-A12YV -
E1
E1
E1
No. OB329
HFC
utilized
R410A
SPLIT-TYPE, AIR CONDITIONERS
SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS
Indication of model name
NOTE:
•This manual describes technical data of indoor units.
•As for outdoor units MU-A07/A09/A12YV - , refer to the service manual OB330.
•As for outdoor units MUH-A07/A09/A12YV - , refer to the service manual OB331.
•As for outdoor units MUX-A10/A19/A20/A25/A26WV - , refer to the service manual OB307 REVISED
EDITION-A.
•As for outdoor units MUX-A22WV - , refer to the service manual OB318.
•As for outdoor units MXZ-A18/A26/A32WV - , refer to the service manual OB319.
E1
E1
E1
E1
E1
OB329-1.qxp 03.12.3 1:16 PM Page 1

Summary

Specification

Microprocessor Control

Cool Operation

Details the operation of the air conditioner in cooling mode, including thermostat and fan speed control.

Dry Operation

Explains the operation of the air conditioner in dry mode, covering thermostat, fan speed, and compressor control.

Fan Operation

Describes the fan-only operation mode, where only the indoor fan operates.

Heat Operation

Details the operation of the air conditioner in heating mode, including thermostat and fan speed control.

I FEEL CONTROL Operation

Explains the 'I FEEL CONTROL' mode, where the operation is determined by initial room temperature.

Cool Mode of I FEEL CONTROL

Dry Mode of I FEEL CONTROL

Heat Mode of I FEEL CONTROL

Service Functions

P.C. Board Modification for Individual Operation

Troubleshooting

Cautions on Troubleshooting

Instruction of Troubleshooting

Troubleshooting Check Table

Trouble Criterion of Main Parts

Test Point Diagram and Voltage

Disassembly Instructions

Removing the Electronic Control P.C. Board and Power Monitor

Mitsubishi Electric MSC-A09YV-E1 Specifications

General

Cooling Capacity	2.5 kW
Heating Capacity	3.2 kW
Energy Efficiency Ratio (EER)	3.21
Seasonal Energy Efficiency Ratio (SEER)	6.1
Refrigerant	R32
Operating Temperature Range (Heating)	-15°C to 24°C
Type	Split System
Power Supply	50 Hz