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FD
19
PROBLEM
LED ON
PROBABLE CAUSE
CORRECTIVE ACTION
B
Fan starts,
compressor
does not start,
but red alarm led
Power supply
led, running led
Compressor thermal
Protection enabled,
compressor defective
Let the compressor cool
Down, replace
compressor defective
Any led
Electronic board or led
Board defective
Replace defective board
PROBLEM
LED ON
PROBABLE CAUSE
CORRECTIVE ACTION
C
Fan starts,
compressor
does
not start, but red
alarm led is on
Red alarm led
Air filter clogged
Clean filter and reset unit
Red alarm led
Low refrigerant charge
Charge the system
Red alarm led
Open panel, low air
flow, suction side
obstructed, high
pressure switch on
Close the panel, clear
Suction side, reset high
pressure switch
Any led
Electronic board or led
Board defective
Replace defective board