Depending on the CRIPHNA version and build I've had several boards that needed to be repaired because of the R176 resistor burning up. Most common sign was 202 error and a lot of random door codes like 75safetyRTS. I'd visually inspect the resistor, it's on the bottom left of the board close to the door power toggle and fuses. If it looks burned it's probably failing and will soon completely stop working.