E20
Indoor fan motor rotation
speed anomaly
Keeps flashing 1(2)-time flash
1. Applicable model
5. Troubleshooting
All models
Diagnosis
Countermeasure
NO
YES
YES
Does any
foreign material
intervene in rotational area
of fan propeller?
Is DC280V
detected between
➀
-
➃
of
fan motor connector
CNM?
Is it normalized?
Is the fuse F2 or F3, 4
blown?
Does the fan
rotate smoothly when turned
by hand?
YES
NO
NO
NO
YES
（
1
）
Note (1)
➃
for GND
NO
YES
Power source reset
Remove foreign material.
Replace the fan motor.
Check power source voltage.
Replace faulty fan motor
and indoor unit control or
power PCB.
Replace fan motor. (If the
error persists after replacing
the fan motor, replace the
indoor unit control PCB.)
Malfunction by temporary
noise
2. Error detection method
Detected by rotation speed of
indoor fan motor
3. Condition of error displayed
When the actual fan rotation
speed does not reach to the
speed of [required speed -50
(FDU, FDUA:-500) min
-1
] after
2 minutes have been elapsed
since the fan motor rotation
speed command was output, the
unit stops by detecting indoor
fan motor anomaly.
4. Presumable cause
• Defective indoor unit control
or power PCB
• Foreign material at rotational
area of fan propeller
• Defective fan motor
• Dust on indoor unit control
PCB
• Blown fuse
• External noise, surge
Note:
Error code
Remote control:
LED
Green
Red
Indoor
Content
Note(1) Value in ( ) is for the FDU series FMi2 only.
'22 • PAC-SM-412
-
79
-