Goodman MSG-18HRN1W - Outdoor Unit Failure to Operate; Indoor Unit Communication Errors

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TROUBLESHOOTING
Outdoor Unit Fails to Operate:
Indoor Unit Communication Error:
Check if power supply is good
Power Supply
failure
Change outdoor control board and check if the error still exists
Outdoor
control board failure
Compressor failure
No
No
Yes
Yes
Check to see if the signal wire is well connected
Connect the signal wire well
or change the signal wire
if it's the problem of the wires.
Change indoor control board and check if the error still exists
Indoor
control board
failure
Outdoor control board failure, change outdoor control board
No
No
Yes
Yes