Midea R32 M thermal Arctic Mono fault H8

What it means

Error code 47. Pressure sensor error detected by user interface and refrigerant system main PCB.

Likely causes

1. Pressure sensor short-circuited or failed
2. Pressure sensor fault
3. Sensor wiring fault

Where to start

1. Measure resistance among three terminals of pressure sensor; mega Ohm or infinite resistance indicates failure
2. Step 1: Check high pressure sensor connection on refrigerant system main PCB for looseness - if yes, ensure sensor connected properly
3. Step 2: Measure resistance among the three terminals of the pressure sensor to check for short-circuit or failure - if failed, replace the sensor