Refrigerant Contamination

Chiller frequently unloading (stop-start); Compressor not starting

Probable causes for the defect

Leakages of condenser tubes induce moisture to refrigerant.
Incondensable gas (air, moisture) diffuse, leak or evaporate into chiller through joints, cracks and gaps. Requires purging.
Mixing of fines from metallic moving parts of compressor motor or of lubricant. Selection of refrigerant is improper.
Mixing of fines from metallic moving parts of compressor motor or of lubricant. Selection of refrigerant is improper.