Carrier 69NT40-561-399 Operation And Service Manual page 75

AL16 COMPRESSOR CURRENT HIGH
Cause: Compressor current draw is over the calculated maximum for 10 minutes.
Component
Corrective Action Replace current sensor if defective.
Component
Corrective Action Correct power supply.
Component
Corrective Action Check air flow of condenser.
Component
Corrective Action If alarm remains active or is repetitive replace compressor at next
Current Sensor
Troubleshooting Compare Cd3 to actual measured current at wire T1-T2 or T3 going
to the compressor contactor. If there is a difference, determine
whether this is caused by current sensor or amp clamp tool.
Amperage is indeed too high.
Troubleshooting Confirm supply voltage/frequency is within specification and bal-
anced according to Electrical Data
Operating Conditions
Troubleshooting Make sure system pressures are relevant to operating conditions.
Check Refrigerant charge, refer to REFRIGERATION SYSTEM
SERVICE
Monitor Unit
Troubleshooting Alarm is display only the alarm may clear itself during operation
available opportunity, refer to COMPRESSOR Service
Section 7.3
4–41
Section 3.3.
Section 7.8.
T-365