R-Pro › Field cases › Refrigeration systems
Compressor Cooling Failure (Insufficient Motor Cooling Gas)
Likely causes
Poor machine room ventilation raising ambient temperature
Check: Measure ambient temperature in machine room (check vs. max rated ambient)
What to do: Measure ambient temperature in machine room (check vs. max rated ambient) → Verify compressor head cooling fan is operating → Use non-contact thermometer on compressor body (normal: ~80°C, danger: ≥100°C) → Check for blocked ventilation openings and improve airflow → Check refrigerant charge (suction pressure via low-side gauge)
Compressor head cooling fan failure
Check: Verify compressor head cooling fan is operating
What to do: Verify compressor head cooling fan is operating → Use non-contact thermometer on compressor body (normal: ~80°C, danger: ≥100°C) → Check for blocked ventilation openings and improve airflow → Check refrigerant charge (suction pressure via low-side gauge)
Insufficient refrigerant charge reducing motor cooling
Check: Use non-contact thermometer on compressor body (normal: ~80°C, danger: ≥100°C)
What to do: Use non-contact thermometer on compressor body (normal: ~80°C, danger: ≥100°C) → Check for blocked ventilation openings and improve airflow → Check refrigerant charge (suction pressure via low-side gauge)
Suction conditions are normal but external cooling of the compressor is inadequate. Check ambient ventilation and cooling fan. Machine room temperature above 43°C may exceed compressor ratings. Add forced ventilation.
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
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