Service manual 
44 
 
 
13.7  Operation lamp off and Timer lamp flashes 
 
 
13.8  Operation lamp on and Timer lamp flashes 
EEROM error, indoor PCB is defective. 
13.9  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.