801 StarCool Alarm Codes And Actions

801	Controller
Description	Controller Internal Voltage Reference Fault
Cause	-
Trouble shooting	Possible causes: Power supply for main controller is not suffi cient. Main controller defective. Accompanied alarms: Check for AL 951 up to AL 996 There may be other accompanied alarms. Trouble shooting: See trouble shooting for accompanied alarms. If none appears, then proceed with 3). Clear other active sensor alarms. The power supply or power-cable for main controller defective. Measure voltage for the main controller. A. If voltage is ok, the main controller is defective and main controller must be replaced. B. Measure voltage for all sensors. Should be between 4.80V DC and 5.20V DC for temperature and pressure transmitters. Humidity sensor must be between 12.00V DC and 34.00V DC. If not ok, the sensor or cable is defective. Replace sensor. C. Measure outlet on transformer between T3 and T4. Correct range 15.30V AC – 24.30V AC. Measure between T5 and T6. Correct range 18.86V AC – 30.00V AC. If within range transformer is ok. D. Replace main controller.
Criteria	One or more of the internal reference voltages are out of limits