Electrical faults in refrigeration compressors are for the most part caused by: Power failure on one of the phases of a three-phase motor, too low voltage, defective winding, abnormal overheating, rotor friction against the stator

Metal fragments resulting from a mechanical accident can fit into the motor windings and

In the presence of a burnt engine of a compressor, maintenance technicians generally consider that the cause must be sought in the engine itself or in the electrical components

Certain chemicals, welding residues, etc.., can, in the presence of air, trigger chemical reactions and destroy oil molecules.