521 StarCool Alarm Codes And Actions

521 FC high volt
Description FC High Voltage Fault Warning
Cause Indication of problems with supply voltage
Trouble
shooting		 Possible causes:
  • The unit is supplied with voltage above specification.
  • Defective FC.
Accompanied alarms:
  • AL 515.
Trouble shooting:
  1. Measure if the power voltage to the unit is within specification. Apply correct voltage.
  2. Turn the unit off for 10 min. and then start it again. If this alarm becomes active again, the FC has an internal fault and must be replaced.
If no FC replacement is available, the unit can be rewired for emergency
operation: See “Emergency Operation” p. 50
Criteria Supply voltage of FC has exceeded 535 V AC (760 V DC)

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