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Air Conditioner
Mitsubishi Electronics
MSH-A18ND
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OB427B-1.qxp 07.5.16 3:30 PM Page 27
Contents
Main
CONTENTS
SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS
Outdoor unit service manual MUH-AND Series (OB428)
MSH-A18ND - MSH-A24ND -
SERVICE MANUAL
INDOOR UNIT
REVISED EDITION-B
Revision B:
TECHNICAL CHANGES
PART NAMES AND FUNCTIONS
MSH-A24ND
2
MSH-18TN - MSH-A18ND - MSH-24TN - MSH-A24ND -
Page
SPECIFICATION
OUTLINES AND DIMENSIONS
Unit: mm
{
WIRING DIAGRAM
MF
MV2
MV1
MF
REFRIGERANT SYSTEM DIAGRAM
SERVICE FUNCTIONS
7-3. AUTO RESTART FUNCTION
7-1. TIMER SHORT MODE
MSH-A18ND
Table 1
Page
TROUBLESHOOTING
8-1. Cautions on troubleshooting
8-2. Instruction of troubleshooting
8-3. Troubleshooting check table
Operation Indicator Lighted Not lighted
8-4. Trouble criterion of main parts
Check of indoor fan motor
8-5. Troubleshooting flow
A
w Check if the remote controller is exclusive for this air conditioner.
B
Check of indoor electronic control P.C. board
C
Varistor (NR11)
Indoor electronic control P.C. board
Fuse (F11)
How to check mis-wiring
OB427B-1.qxp 07.5.16 3:30 PM Page 16
D
Refer to outdoor unit service manual.
When OPERATION INDICATOR lamp flashes ON and OFF in every 0.5-second. Outdoor unit doesnt operate.
}
Receiver P.C. board
+ }
+
}
DISASSEMBLY INSTRUCTIONS
MSH-A18ND MSH-A24ND
Photo 2
<"Terminal with locking mechanism" Detaching points>
OPERATING PROCEDURE PHOTOS
OPERATING PROCEDURE PHOTOS
Photo 4
Photo 6
Photo 5
Photo 7 Photo 8
10-1. INDOOR UNIT STRUCTURAL PARTS
10-2. INDOOR UNIT HEAT EXCHANGER
8 (See 10-5.)
10-1. INDOOR UNIT STRUCTURAL PARTS
10-4. ACCESSORY AND
10-3. INDOOR UNIT FUNCTIONAL PARTS AND ELECTRICAL PARTS
14
815 16
18
10-5. AIR CLEANING FILTER
11-1. INDOOR UNIT STRUCTURAL PARTS
11-2. INDOOR UNIT HEAT EXCHANGER
8 (See 11-5.)
11-1. INDOOR UNIT STRUCTURAL PARTS
MSH-A24ND 11-4. ACCESSORYAND
11-3. INDOOR UNIT FUNCTIONAL PARTS AND ELECTRICAL PARTS
14
815 16
11-4. ACCESSORYAND REMOTE CONTROLLER
11-5. AIR CLEANING FILTER
Page
Page
TM