418 StarCool Alarm Codes And Actions

418  Under voltage
Description U1-2 and U1-3 and U2-3 under voltage
Cause Indication of error in container supply voltage between phases
Trouble
shooting		 Possible causes:

  • The unit is supplied with a voltage below specified level.
  • Defective Power module PCB

Trouble shooting:

  1. Try to correct the error by uploading the latest software version to the controller.
  2. Measure the voltage applied to the unit.
  3. Apply correct voltage to the unit. The FC will not be able to maintain stable speed of the compressor motor due to a too low voltage and therefore the unit will make a restart.
  4. Measure the actual voltage and compare with the value in the display. If the measurement differs the power module PCB may be defective. Replace or bypass power module PCB by pressing (spaner icon) selecting configuration then phase direction and then cw. If condenser fan rotates in the wrong direction, choose ccw. This action is to be performed at every unit start up.
Criteria Value below low alarm limit 335 Volt
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