525 StarCool Alarm Codes And Actions

525	FC overload
Description	FC Overload Warning
Cause	Indication of problems with compressor
Trouble shooting	Possible causes: The FC cannot supply enough power to the compressor. Insufficient cooling for the FC. Defective FC. Accompanied alarms AL 522 or AL 525 may also be active and should be checked first. Trouble shooting: At very high ambient temperatures and very low setpoint temperatures, the FC may get too hot to generate enough power. Check that all bolts fixing the FC to the compressor are fastened and nothing is jammed between the FC and the compressor. The power cable for the compressor motor (Mcpr) may have been mounted incorrectly and therefore the cooling contact between the FC and the compressor is not good enough. Check the motor cable and replace it if it is defective. Fasten bolts properly for better cooling. The compressor is wearing down and drawing increasingly power from the FC. Check other alarms if there have been more alarms from the FC. A. If the ambient temperature is not high, the compressor must be replaced. B. If the ambient temperature is high, the compressor and FC should be OK but close to operating limit. Monitor unit and see if problem continues. The FC is defective and must be replaced. If no FC replacement is available, the unit can be rewired for emergency operation: See “Emergency Operation” p. 50
Criteria	FC load has exceeded warning limit of 24 Amp