Operation Lamp Flashes And Timer Lamp On; Operation Lamp Off And Timer Lamp Flashes; Operation Lamp On And Timer Lamp Flashes; Operation Lamp Flashes, Timer Lamp Flashes - Fisher FSArt-70HF Service Manual

9.6 Operation lamp flashes and Timer lamp on.

9.7 Operation lamp off and Timer lamp flashes

Operation lamp off and Timer lamp flashes
After changing the main control board, check if the failure realease.
No
Indoor PCB is defective.
The voltage of power supply is too low (less than 187V). No
Outdoor unit fault (such
as the compressor).
Power supply fault.

9.8 Operation lamp on and Timer lamp flashes

EEROM error, indoor PCB is defective.

9.9 Operation lamp flashes, Timer lamp flashes .

This is alarm signal when the main chip can't detect over-zero signal. When such failure occurs, the main control board
must have fault.
34