981 StarCool Alarm Codes And Actions

981 Tinternal HI
Description Controller Internal Temperature Sensor High Temperature Fault
Cause Indication of controller internal temperature sensor 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. Check voltage level of 24V DC and 5V signals to see if power supply has an open circuit or other damages. If voltages are ok, the main controller is defective.
Replace main controller.
Criteria Internal temperature sensor above +70°C (158°F)

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