965 StarCool Alarm Codes And Actions

965 Controller sup LO
Description Controller Internal Voltage Reference Fault
Cause Indication of controller internal voltage reference fault
Trouble
shooting		 Possible causes:
  • Defective power supply for main controller.
  • Defective main controller.
Accompanied alarms:
  • There may be sensor alarms, especially AL 1XX and AL 2XX.
  • AL 801 will be activated during FT- or PTI test.
Trouble shooting:

  1. Check if there are other active (sensor) alarms. Clear these alarms fi rst using their trouble shooting.
  2. The main controller is defective.
Replace the main controller.
Criteria Reference voltage below 4.80V DC

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