509 StarCool Alarm Codes And Actions

509  FC 24 V fault
Description FC Internal 24 V Supply Fault Alarm
Cause Indication of problems with FC
Trouble
shooting		 Possible causes:

  • Internal fault in the FC.

Trouble shooting:

  1. Try to correct the error by uploading the latest software version to the controller.
  2. Switch off the unit and wait 10 min. before switching on the unit again.
  3. If the alarm is then still active, the FC is defective and must be replaced. If there is no FC replacement available, the unit can be rewired for emergency operation: See “11. Emergency Operation” p. 54
Criteria Internal 24 V supply error
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