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4. How to check the Fan-Error
(1) 6871JB1431A ( ~ July 2007)
After sending a signal to the fan, the MICOM checks the BLDC fan
motor’s lock status. If there is no feedback signal from the BLDC fan,
the fan motor stops for 10 seconds and then is powered again for 15
seconds. To determine that there is a fan motor malfunction,
this process is repeated 5 times. If the fan motor is determined to be
defective, the error code will be shown continuously in the display.
At this point, there is no further check of the fan motor.
(2) EBR34917102 ( Aug 2007 ~)
After sending a signal to the fan, the MICOM checks the BLDC fan
motor’s lock status. If there is no feedback signal from the BLDC fan,
the fan motor stops for 10 seconds and then is powered again for 15
seconds. To determine that there is a fan motor malfunction,
this process is repeated 3 times. If the fan motor is determined to be
defective, the error code will be shown in the display for 30 minutes.
At this point, the process will be repeated until the fan motor operates
normally. If normal operation is achieved, the error display is erased and
the MICOM is reset automatically.
No signal
15s
10s
15s
10s
15s
10s
15s
10s
15s
Normal
drive
Error Display
No signal
15s
10s
15s
10s
15s
Normal drive
No signal Repeat
15s
10s
15s
10s Pause 30min
Pause 30min
10s
15s 15s