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Service Manual
MODEL:
MUL FWCA-SL Series
CASSETTE COMPACT
MUL 12FWCA-SL
MUL 18FWCA-SL
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Summary and features....................................................................................................
1 Safety Precautions .......................................................................................................
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3 Construction Views ....................................................................................................
4 Refrigerant System Diagram ......................................................................................
5 Schematic Diagram .....................................................................................................
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6 Function and Control ................................................................................................
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7 Exploded Views and Parts List ..................................................................................
8Troubleshooting ..........................................................................................................
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9 Removal Procedure...................................................................................................
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Service Manual
Summary and features
MUL 12FWCA - SL / MUL18FWCA - SL
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Service Manual
1 Safety Precautions
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3 Construction Views
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4 Refrigerant System Diagram
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6 Function and Control
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Y
N
Check if water overflow
Check if the voltage of liquid level
switch end is ok
Y
Check if the water drainage
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pump
N
Check if the voltage of water
drainage pump end is ok
Replace the main board
of the indoor uint
Y
Check the liquid level
switch
N
Replace the main board of
the indoor uint
Y
Y
Check if the water drainage pipe is
jammed or if water flows smoothly
N
N
Check the cables of
water drainge pump
Adjust the water
drainage pipe
Y
Clear the water drainage pipe
73
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Service Manual
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Failure of condenser Temp.
sensor
Y
Check if the plug of the temperature sensor is
correctly connected with socket on the mainboard
N
Check the direction of
the plug and socket
Y
Remove the sensor to check if the resistance
value is ok
Y
Replace mainboard of the
indoor uint
74
N
Replace temperature sensor
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