Midea R32 M thermal Arctic Mono fault C7

What it means

Transducer module temperature too high protect (serial number 65)

Likely causes

1. Excessive ambient temperature, blocked cooling airflow, transducer module malfunction
2. Module temperature at or above Tf2 threshold (model dependent: 75°C for 4-6kW, 81°C for 8-10kW, 100°C for 12-16kW 1ph, 84°C for 12-16kW 3ph)
3. Insufficient cooling of module
4. Excessive compressor load or ambient conditions
5. Module temperature exceeding maximum safe operating temperature

Where to start

1. Check transducer module temperature reading, verify ambient conditions, inspect for airflow blockage
2. Measure module temperature
3. Identify unit model/capacity to determine correct Tf2/Tf0 threshold