R-Pro › Field cases › Refrigeration systems
Abnormal noise from compressor
Likely causes
Liquid slugging (liquid back)
Check: Measure suction line temperature — check for excessive subcooling
What to do: Measure suction line temperature — check for excessive subcooling → Determine if noise occurs at startup or during operation → Check tightness of mounting bolts → Check oil level → Measure discharge temperature — lower than normal suggests liquid slugging
Insufficient refrigeration oil
Check: Determine if noise occurs at startup or during operation
What to do: Determine if noise occurs at startup or during operation → Check tightness of mounting bolts → Check oil level → Measure discharge temperature — lower than normal suggests liquid slugging
Loose mounting bolts
Check: Check tightness of mounting bolts
What to do: Check tightness of mounting bolts → Check oil level → Measure discharge temperature — lower than normal suggests liquid slugging
Internal valve damage
Check: Check oil level
What to do: Check oil level → Measure discharge temperature — lower than normal suggests liquid slugging
Refrigerant overcharge
Check: Measure discharge temperature — lower than normal suggests liquid slugging
What to do: Measure discharge temperature — lower than normal suggests liquid slugging
Liquid slugging can destroy the compressor — stop operation immediately and eliminate the cause
All 565 cases work offline in R-Pro, with error codes for 62 brands and P-T data for 108 refrigerants.
Open R-Pro →Related cases
- Aging Room Humidity Control Failure (Unable to Maintain 85~95%RH)
- Ethylene Buildup in Meal Kit/Produce Warehouse — Over-Ripening Due to Ventilation Failure
- End-Zone Temperature Rise (Uneven Cooling)
- Air Curtain Weakening
- Excessive Temperature Rise After Defrost
- Excessive Heat Load from Direct Sunlight or Lighting