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NO
NO
Abnormal data check
with remote controller
After check reset,
fan runs on Me.
Check the
circumstances.
Was it reproduced?
Fan ON?
NO
NO
NO
NO
NO
NO
YES
YES
YES
YES
YES
YES YES
YES
When the
motor is turning, does
the voltage at CNM 6 (Blue)
fluctuate between
DC 0 ~ 15 V?
Secondary
side of transformer
(red-red) 14V
or more
Does the
fan motor turn
smoothly by
hand?
Is the voltage
at CNM 5 (Yellow) DC 1V
or higher?
CNM
1 and 3 (Red – Black)
DC280V?
CNM
4 and 3 (White-Black)
DC15V?
Replacement indoor
unit control PCB
Replacement indoor
unit control PCB
Detective fan motor
Replacement indoor
unit control PCB
Replacement transformer
3 (Black) is GND.
(1)
(2)
3 (Black) is GND.
Note (2) CNM 3 (Black) is GND.
Note (1) CNM 3 (Black) is GND.
S Only case of FDKN
Only case of 151~251 types
● Display conditions
If an indoor unit fan motor’s speed is detected to be less than
200 rpm continuously for 30 seconds, the fan motor stops for 2
seconds. After 2 seconds, it starts again, but this occurs 4 times
within a period of 1 hour.
NO
After check reset,
fan runs on Me.
Turn the power off and wait
a short time (30 min. ~ 1 hr.)
Check the
circumstances.
Replacement fan
motor
Check the
circumstances.
YES
YES
NO
NO
YES
Was it reproduced?
Fan ON ?
NO
YES
YES
YES
When
the motor is turning,
does the voltage at CNM 5
(White) fluctuate between
DC 0 ~ 15 V?
YES
When tried again,
the fan goes ON.
Replacement indoor
unit control PCB
Replacement indoor
unit control PCB
Note (1) CNM 4 (Blue) is GND.
(1)
Replacement fan
motor
NO
CNM
1 and 4 (Red-Blue)
DC 0~60V ?
3 (black) is GND.
Only case of 301 type
● Display conditions
If an indoor unit fan motor’s speed is detected to be less than
200 rpm continuously for 30 seconds, the fan motor stops for 2
seconds. After 2 seconds, it starts again, but this occurs 4 times
within a period of 1 hour.