R-Pro › Field cases › Refrigeration systems
No Cooling Due to Compressor Not Running
Likely causes
Power or control signal fault preventing start
Check: Check voltage at compressor terminals
What to do: Check voltage at compressor terminals → Verify control signal (thermostat output) → Check if overload/high-pressure/low-pressure protection tripped → Follow 'Compressor Does Not Start' diagnostic tree
Protection device (overload/high/low pressure) shutdown
Check: Verify control signal (thermostat output)
What to do: Verify control signal (thermostat output) → Check if overload/high-pressure/low-pressure protection tripped → Follow 'Compressor Does Not Start' diagnostic tree
Compressor internal failure
Check: Check if overload/high-pressure/low-pressure protection tripped
What to do: Check if overload/high-pressure/low-pressure protection tripped → Follow 'Compressor Does Not Start' diagnostic tree
Cooling has stopped because the compressor is not running. Go to 'Compressor Does Not Start' to diagnose the cause.
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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