Resetting Phenomenon Often Occurs During Operation; Indoor Unit Error Display：e3 - Midea MSV1-07CR-QB8F Service Manual

11.4 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.
After changing indoor fan motor, check if the failure realease.
Power supply circuit has problems.
11.5 Indoor Unit Error Display：E3.
Yes
Yes
YES
Service manual
Yes
Indoor PCB is defective.
- 37 -