Service manual

YES
NO
OK
OK
NO YES
YES
NO
YES
NO
NO
YES
NG
OK
NG
NG
NG
NG
NO
NG
NG
NG
NG
OK
OK
OK
OK
OK
OK
OK
NG
OK
OK
OK
NG
NG
OK
YES
A B
C D
OK
NG
NG
OK
Does the compressor operate?
Is the operating environment
low temperature?
(less than 2°C)
Dehumidification may not be
possible in low temperature
environments. (The compressor
does not operate by detecting
abnormal low temperature)
Check if there is no disconnection
or contact failure of the connector
(
P5
)
and connector pins of power
control board.
Insert the connector
and connector pins
securely.
Check the current fuse of
motor protector
(
2A/250V
)
.
Replace the current fuse.
Check the continuity of the
motor protector.
Nornal:Open
Abnormal:Short
*
Check it at room temperature
when the power is off.
Replace the motor protector.
Check the resistance of
the compressor.
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Abnormal:Open or short
Replace the compressor.
Is there an overcurrent?
(The surface of the compressor is hot.)
Replace the compressor.
Replace the power control board.
Replace the operation control board.
Is the heat exchanger
(evaporator) cold?
Check the coolant circuit.
(If the coolant leaks.
If the tube clogs.)
Ɣ
The part of the cooler near
the tube temperature sensor
should be at least 10°C lower
than room temperature when
normal.
Ɣ The bottom of the heat
exchanger has frost when the
quantity of coolant is little by
coolant leaking.
Are the power consumption
and current normal?
Replace the parts that
coolant is leaking or the
tube is clogged.
Check the resistance of the
tube temperature sensing thermistor.
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Abnormal:Open or short
Replace the tube temperature
sensing thermistor
Replace the power control board.
Replace the operation control board.
*Note: Do not replace the compressor easily excpet when the overcurrent(Lock),
the abnormal noise or the abnormal vibration is occured.
(includes the oil leak in the compressor)
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