Carrier 38 KCL018R33 - Resetting Phenomenon Often Occurs During Operation; Operation Lamp Flashes and Timer Lamp off; Operation Lamp Flashes and Timer Lamp on

Service manual
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10.4
Resetting phenomenon often occurs during operation.
(That is automatically entering to the status when power is on.)
The reason is that the instantaneous voltage of main chip is less than 4.5V. Check according to the following
procedure:
Resetting phenomenon often occurs during operation.
After changing indoor PCB, check if the failure realease.
Yes
After changing indoor fan motor, check if the failure realease.
Yes
YES
Yes
Power supply circuit has problems.
Indoor PCB is defective.
10.5
Operation lamp flashes and Timer lamp off.
10.6
Operation lamp flashes and Timer lamp on.