980 StarCool Alarm Codes And Actions

980 Tinternal 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:
  • 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 Internal temperature sensor below -40°C (-40°F)

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