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Remove fan motor after
switch off the power and
restart the unit, the LED 2
becomes light or flash.
NO
Test the fan motor terminal
resistance between pin 1 (310V)
and pin 4 (0V), or pin5 (15V) and
pin4 (0V) of CN21 are close to
0mΩ with a universal meter after
switch off the power.
YES
Fan motor is damaged. Replace
it with a new one.
NO
50
Service Diagnosis
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