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ymerrittAug 11, 2025
What to do if Danfoss OPTYMA Control Unit compressor is not starting?
- JJessica PriceAug 11, 2025
If the compressor is not starting, it could be due to the following reasons: * The control is in stand-by mode: Check that the control is not in stand-by mode (flashing green light). If it is, press the key to activate the control (continuous light). * Pressure switches or Kriwan malfunctioning have intervened: Check wirings, calibration, and correct functioning of the compressor and sensors. If starting the system for the very first time, check that there is a bridge for pump-down/thermostat function selection on the X1 terminal block. Make bridges on the terminal block to accommodate devices not present in the system (Kriwan, pressure switches).
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