The split condenser unit compressor starts running, but stops quickly by thermal protection.

- Low thermal load.
- Compressor defective.
- Power supply voltage too high or too low.
- Faulty thermostat.
- Restriction in the refrigeration circuit.
- Expansion device with ice or clogged.
- Little air flow in the internal unit (evaporator) or external (condenser).
- Defective power supply.
- Damage to the reversing or locking valve (heating pump units).