402 StarCool Alarm Codes And Actions

402	Mcond overheat
Description	Condenser Motor Overheat
Cause	Indication of an overheated motor or a loose thermistor cable connection
Trouble shooting	Possible causes: Condenser motor defective. Cable for measuring condenser motor overheat defective. Main controller defective. Trouble shooting: Try to correct the error by uploading the latest software version to the controller. Turn off unit! See if the condenser fan can turn freely. If it cannot turn, replace the motor. If the motor is hot, it may be overloaded and jammed or defective. If the cable for McondOH by inspection is defective, if unable to repair cable, replace it. Disconnect the cable for Mcond on the main controller according to the wiring schematics inside the control cabinet. Measure the resistance in the cable. If the resistance is more than 1 MΩ, the cable or the motor is defective and should be replaced. If the resistance is less than (<) 5 kΩ, the cable and motor should be OK. Turn unit on again. Measure the voltage across the connector for Mcond. It should be between 4.80 V DC and 5.20 V DC. a) If the voltage is inside the above range, connect sensor again. Measure the voltage across the thermistor and check the voltage. If the voltage is less than (<) 2.5 V DC, the measurement is OK. If the alarm after 30 sec. is still active in the display, the main controller is defective - replace the main controller. b) If the voltage is outside the range, main controller is defective or another error might affect the voltage. Check other alarms before replacing main controller.
Criteria	Value above top alarm limit 10K Ohm