Operation Lamp Off And Timer Lamp Flashes; Operation Lamp On And Timer Lamp Flashes; Operation Lamp Flashes, Timer Lamp Flashes - Midea MSG-30CRN1-QB9P Service Manual

12.7 Operation lamp off and Timer lamp flashes

12.8 Operation lamp on and Timer lamp flashes

EEROM error, indoor PCB is defective.

12.9 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.
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Service manual