-
257
-
NO
NO
Check the operation data
by the remote controller.
Reset the error code and operate the
fan in fan mode with Lo fan speed.
Check the
circumstances.
Is the error
reproduced?
Does the fan
operate?
NO
NO
NO
NO
NO
NO
YES
YES
YES
YES
YES
YES
YES
YES
Secondary
side of transformer
(brown-brown) 17V
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?
Replace the indoor
unit control PCB.
Replace the indoor
unit control PCB.
Replace the fan motor.
Replace the indoor
unit control PCB.
Replace the 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.
When the motor is
running, is the voltage between
blue wire on CnM 6 and black wire on
CnM 3 fluctuating between
0 to 15V?
Only in case of FDKN
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.
Only in case of FDTC
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
NO
Check the operation data
by the remote controller.
Reset the error code and operate the
fan in fan mode with Mid fan speed.
Check the
circumstances.
Is the error
reproduced?
Does the fan
operate?
NO
NO
NO
NO
NO
NO
YES
YES
YES
YES
YES
YES
YES
YES
Secondary
side of transformer
(brown-brown) 17V
or more.
Does the
fan motor turn
smoothly by
hand?
Is the voltage
at CnM2 3 (Black) DC 1V
or higher?
CnM1
1 and 3 (Red - White)
DC320V?
CnM2 4 (Blue)
- CnM1 3 (White)
DC15V?
Replace the indoor
unit control PCB.
Replace the indoor
unit control PCB.
Replace the fan motor.
Replace the indoor
unit control PCB.
Replace the transformer.
3 (White) is GND.
(1)
(2)
3 (White) is GND.
Note (2) CNM1 3 (White) is GND.
Note (1) CNM1 3 (White) is GND.
When the motor is
running, is the voltage between
brown wire on CnM2 2 and white wire on
CnM1 3 fluctuating between
0 to 15V?
