R-Pro › Field cases › Refrigeration systems
Compressor Internal Bearing Wear or Oil Shortage
Likely causes
Bearing wear from insufficient or degraded oil
Check: Check oil separator and oil level sight glass
What to do: Check oil separator and oil level sight glass → If noise is worsening, stop operation immediately → Recover refrigerant and replace compressor → Verify oil spec and quantity, then recharge → Confirm noise and oil pressure after restart
Mechanical damage from liquid slugging
Check: If noise is worsening, stop operation immediately
What to do: If noise is worsening, stop operation immediately → Recover refrigerant and replace compressor → Verify oil spec and quantity, then recharge → Confirm noise and oil pressure after restart
End-of-life from extended operation
Check: Recover refrigerant and replace compressor
What to do: Recover refrigerant and replace compressor → Verify oil spec and quantity, then recharge → Confirm noise and oil pressure after restart
Metal scraping indicates internal bearing wear or oil shortage. If noise worsens, stop immediately and replace the compressor. Ignoring grinding noise risks burnout and oil contamination throughout the entire refrigeration circuit.
All 565 cases work offline in R-Pro, with error codes for 62 brands and P-T data for 108 refrigerants.
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