I've looked for a schematic since I've owned these Sanyos.. Never found one.
The surge suppressor didn't help with this failure.
Eaton Complete Home Surge Protection-CHSPT2MICRO - The Home Depot
The two Protection LEDs are still on, so I guess it's not broken.
I'm starting to think about getting a new GREE Terra 9000 BTU and just replace that old Sanyo.
GREE Terra 9,000 BTU Ductless Mini Split AC FREE 25' Line Set
Right off, I'm not seeing the specs for cold weather operation..
I wonder how good these are, and the lower cost models.?.