Service manual

YES
YES
YES
YES
YES
YES
NO
NO
NO
NO
NO
NO
YES
YES
NO
OK
OK
NO
NG
NG NG
NG
YES
OK
OK
NG
OK
OK
OK
OK
C
E
D
Are there any clogs or dust on
the filter.
Clean filter.
Is the operating environment
low humidity and low temperature?
It is normal.
Dehumidication may not be
possible in low humidity and
low temperature environments.
Explain the performance
curve on P9.
The unit is normal.
The unit stop working in the
middle of operation.
Is the defrost mode selected?
Does the defrost indicator light?
It is normal.
Defrost mode is operating.
Airflow stops in a few minutes.
Is automatic operation
selected?
Easy dehumidifying /
Intelligent laundry /
Mildew guard / Auto / Off timer
Is the operating
environment low humidity
and low temperature?
Dehumidication may
not be possible in low
humidity and low
temperature environments.
Explain the performance
curve on P9.
1) Easy dehumidifying:It stops according to the humidity level.
2) Intelligent laundry:It stops in a minimum of about 60 minutes and a maximum of about
12 hours.
3) Mildew guard:It operates intermittently 2-4 hours (24 hours).The operating time varies
depending on the humidity.
4) Auto:Compressor and blower fan stop when current humidity is -1% of set humidity or less.
5) Off timer:It stops at the set time.
6) All operation mode:Is the off timer operation selected with other operation mode?
Off timer operation has priority over other modes.
1-6 indicate that the unit is operating normally. Explain that to the customer.
Stepping motor (louvre)
does not operate.
Is the swing louvre switch
“OFF”?
Does the swing direction of
the louvre change to “Wide”,
“Upward”,or ”Rear”?
Check if there is no disconnection or
contact failure of the connector
(
P20
)
and
connector pins of power control board.
Insert the connector and
connector pins securely.
Check the resistance between
connector pins of the stepping
motor (P20 connector).
Normal:
Terminal1-2
Terminal1-3
Terminal1-4
Terminal1-5
Abnormal:Each interval is
open or short
342-418ȍ
Replace the stepping motor.
Replace the power control board.
Replace the operation control board.
The unit is normal.
OK
NG
NG
OK
NG
NG
NG
OK
OK
OK
NO
YES
Does the solenoid valve operate?
(Shorten J301 and J302)
Check if there is no disconnection
or contact failure of the connector
(
P3
)
and connector pins of power
control board.
Insert the connector
and connector pins
securely.
Check the resistance of the
solenoid valve coil.(P3 connector)
Nornal:Between the pin1 and
pin2 2.0kȍ-2.2kȍ
Abnormal:Open or short
Replace the solenoid valve coil.
Replace the power control board.
Replace the operation control board.
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