423 StarCool Alarm Codes And Actions

423  No phase direction
Description Phase direction not detectable
Cause Phases may be lacking or there may be extremely high noise in one or more phases in the detection moment
Trouble
shooting		 Possible causes:

  • The unit is supplied with an unstable voltage.
  • The power frequency is out of specified range.
  • Defective Power module PCB

Trouble shooting:

  1. Try to correct the error by uploading the latest software version to the controller.
  2. Check if voltage on all 3 phases is within specified range.
  3. Verify that power frequency is within specified range.
  4. Check/replace power module PCB.
  5. If 1) to 4) are OK, then replace the main controller or set the correct phase direction on the Configuration menu F05 to clockwise or counterclockwise.
Criteria Impossible to detect phase sequence in power supply
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