R-Pro › Field cases › Refrigeration systems
Compressor Discharge Valve Leak Sound
Likely causes
Discharge valve plate worn or broken
Check: Low high-side + high low-side pressure = evidence of valve backflow
What to do: Low high-side + high low-side pressure = evidence of valve backflow → Measure compressor current (may be lower due to reduced load) → Confirm cooling performance degradation → Recover refrigerant and replace compressor → Verify pressure and current normalize after replacement
Valve spring fatigue
Check: Measure compressor current (may be lower due to reduced load)
What to do: Measure compressor current (may be lower due to reduced load) → Confirm cooling performance degradation → Recover refrigerant and replace compressor → Verify pressure and current normalize after replacement
End-of-life from extended operation
Check: Confirm cooling performance degradation
What to do: Confirm cooling performance degradation → Recover refrigerant and replace compressor → Verify pressure and current normalize after replacement
High-pressure gas is leaking back through the discharge valve. Cooling efficiency drops. Compressor replacement needed. Never open the compressor without recovering refrigerant first.
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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