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Air Conditioner
Mitsubishi Electronics
- page 78
Models:
MSH-07NV
MSH-09NV
MSH-12NV
MSH-18NV
MSH-24NV
1
78
80
80
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80 pages, 3.19 Mb
78
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13
7 5
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OUTDOOR UNIT
STRUCTURAL PARTS
MUH-24NV-
MUH-24NV-
E2
E1
24
23
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Contents
Main
SERVICE MANUAL
SPLIT-TYPE,HEATPUMP AIR CONDITIONERS
CONTENTS
Wireless type Models
MSH-24NV - (WH) MUH-24NV -
TECHNICAL CHANGES
1
MSH-17NV - MSH-07NV -
MSH-09NV - MSH-09NV -
MSH-12NV - MSH-12NV -
PART NAMES AND FUNCTIONS
2
Page
Page
SPECIFICATION
3
Page
Page
Page
Page
Page
Page
MSH-18NV - MSH-24NV - MSH-18NV - MSH-24NV - MSH-18NV -
Unit: mm
{
MUH-18NV - MUH-18NV - MUH-18NV -
MUH-24NV- MUH-24NV-
OB207t-1qxp 25/9/97 8:52 PM Page 14
R20
WIRING DIAGRAM
5
MUH-09NV -
MSH-07NV - MSH-09NV -
MSH-12NV -
MUH-12NV -
MSH-18NV -
MUH-18NV -
MSH-24NV -
MUH-24NV -
MSH-07NV - MSH-09NV - MSH-12NV -
MUH-07NV - MUH-09NV -
MC
MF
MUH-12NV - E2 MODEL WIRING DIAGRAM
MC
MF
MSH-18NV -
MUH-18NV -
MSH-24NV -
MF
MC
MUH-24NV -
MF
MC
REFRIGERANT SYSTEM DIAGRAM
6
MSH-09NV -
MUH-07NV -
MSH-07NV - MSH-07NV -
MSH-12NV - MSH-12NV -
MUH-12NV -
MSH-24NV - MSH-24NV -
MUH-24NV -
MAX. HEIGHT DIFFERENCE
ADDITIONAL REFRIGERANT CHARGE(R-22 : g)
MAX. REFRIGERANT PIPING LENGTH
EVACUATION PROCEDURES(AIR PURGE)
OB207t-1qxp 25/9/97 8:53 PM Page 28
(1) GUARANTEED VOLTAGE
(2) AIR FLOW
(3) MAIN READINGS
}
}
PERFORMANCE CURVES
Wet-and dry-bulb thermometers Wet-and dry-bulb thermometers
MUH-07NV -
OUTDOOR LOW PRESSURE AND OUTDOOR UNIT CURRENT COOL operation
MUH-12NV -
MUH-09NV -
HEAT operation
MUH-09NV -
Wet bulb temperature 6,12,14.5C
MUH-07NV -
MICROPROCESSOR CONTROL
8
MSH-18NV - MSH-24NV - MSH-18NV -
INDOOR UNIT DISPLAYSECTION
8-1. I FEEL CONTROL ( ) OPERATION
NOTE : Coil frost prevention during COOL mode of I FEEL CONTROL
COOL mode of I FEEL CONTROL
HEAT mode of I FEELCONTROL
2. High pressure protection
Page
8-2. COOL ( ) OPERATION
8-3. DRY( ) OPERATION
8-4. HEAT ( ) OPERATION
8-6. AUTO VANE OPERATION
Page
8-8. TIMER OPERATION
PROGRAM TIMER
8-9. EMERGENCY-TEST OPERATION
Emergency operation switch
9SERVICE FUNCTIONS
1. COMPULSORYDEFROSTING MODE FOR SERVICE
2. DEFROST TERMINATION CHANGE
4. P.C. BOARD MODIFICATION FOR INDIVIDUALOPERATION
3. TIMER SHORT MODE
Table.1
MSH-07NV - MSH-09NV - MSH-12NV - MSH-24NV -
10 TROUBLESHOOTING
10-1 Cautions on troubleshooting
MSH-18NV - MSH-24NV - MSH-07NV - MSH-09NV - MSH-12NV - MSH-18NV -
AABB
10-2 Instruction of troubleshooting
(
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2
8
7
6
5
10-2-2 Trouble criterion of main parts
Check of indoor fan motor
A
B
Check of receiver P.C. board
{}
Check of indoor electronic control P.C. board
C
Check of outdoor unit
D
Compressor and outdoor fan do not operate.(Only indoor fan operates.)
MSH-07NV MSH-09NV MSH-12NV MSH-18NV
How to check mis-wiring and serial signal error (when outdoor unit does not work)
MSH-24NV
E
}
}
Outdoor deicer P.C. board
}
}
+ --
DEICER P.C. BOARD
-- +-- +
}
TEST POINT DIAGRAM AND VOLTAGE MSH-24NV - MSH-18NV -
}
+ }
Outdoor deicer P.C. board
}
DEICER P.C. BOARD
11 DISASSEMBLY INSTRUCTIONS
2. Removing the electronic control P.C. board and the display P.C. board.
1. Removing the front panel
11-1 MSH-07NV - MSH-09NV - MSH-12NV -
NOTE:
3. Removing the electrical box
Photo 3
4. Removing the vane motor
5. Removing the line flow fan and the indoor fan motor
1. Removing the front panel
11-2 MSH-18NV - MSH-24NV - MSH-18NV - MSH-24NV -
3. Removing the electrical box
4. Removing the indoor fan motor and the line flow fan
Photo 3
11-3 MUH-07NV - MUH-09NV - MUH-07NV - MUH-09NV -
Page
1. Removing the cabinet
2. Removing the deicer P.C. board
Photo 3
11-4 MUH-12NV - MUH-18NV - MUH-12NV - MUH-18NV -
3. Removing the outdoor fan motor
4. Removing the compressor
11-5 MUH-24NV- MUH-24NV-
Photo 6
12 PARTS LIST
Optional parts
HEAT EXCHANGER
ELECTRICAL PARTS
5 11 13
MUH-09NV -
-
FUNCTIONAL PARTS AND ELECTRICALPARTS
MUH-09NV -
14 7
17 18
11
MUH-12NV - MUH-12NV -
Optional parts
23
HEAT EXCHANGER PARTS
ELECTRICAL PARTS
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8410 22
14
Page
MUH-24NV- MUH-24NV-
E02 139 426 E02 141 083
2
REMOTE CONTROLLER REMOTE CONTROLLER HOLDER
Symbol in Wiring Diagram
13 OPTIONAL PARTS
2. AIR CLEANING FILTER
3. DEODORIZING FILTER
1. REFRIGERANT PIPES