Carrier 69NT40-561-300, Operation And Service Manual

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T-365 4–42
AL17 COMPRESSOR PRESSURE DELTA FAULT
Cause: Compressor has attempted to start in both directions and fails to generate sufficient pressure dif-
ferential between SPT and DPT.
Component N/A
Troubleshooting Controller will attempt restart every 20 minutes and deactivate the
alarm if successful.
Corrective Action Resume normal operation.
Component Discharge Pressure Transducer (DPT)
Troubleshooting Confirm accurate DPT pressure readings, refer to MANIFOLD
GAUGE SET
Section 7.2 .
Corrective Action Replace DPT if defective.
Component Suction Pressure Transducer (SPT)
Troubleshooting Confirm accurate SPT pressure readings, refer to MANIFOLD
GAUGE SET
Section 7.2 .
Corrective Action Replace SPT if defective.
Component Monitor unit
Troubleshooting Alarm is display only the alarm may clear itself during operation.
Corrective Action If alarm remains active or is repetitive replace compressor at next
available opportunity.