523 StarCool Alarm Codes And Actions

523 FC phase loss
Description FC Phase Loss Fault Warning
Cause Indication of defective FC or missing phase
Trouble
shooting		 Possible causes:
  • One or more phases are not applied to the FC.
  • Unstable power supply (generator).
  • Defective FC.
Accompanied alarms:
  • AL 417, AL 418, AL 419, AL 516 may be active.
Trouble shooting:
  1. Verify that voltage levels are the same for all 3 phases (difference in voltage below 14 V AC).
  2. Supply unit with correct power voltage according to specification.
  3. Replace the FC.
If no FC replacement is available, the unit can be rewired for emergency
operation.
Criteria FC cannot maintain DC filter voltage above warning is more than 70 V
DC peak to peak (too much ripple in DC voltage).

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