AL17 Compressor Pressure Delta Fault

Cause
  • Compressor has attempted to start in both directions and fails to generate sufficient pressure differential between SPT and DPT.
Components Troubleshooting Corrective actions
N/A Controller will attempt restart every 20 minutes and deactivate the alarm if successful. Resume normal operation.
Discharge Pressure Transducer (DPT) Confirm accurate DPT pressure readings, refer to MANIFOLD GAUGE SET Section 6.2. Replace DPT if defective.
Suction Pressure Transducer (SPT) Confirm accurate SPT pressure readings, refer to MANIFOLD GAUGE SET Section 6.2. Replace SPT if defective.
Discharge Pressure Transducer (DPT) Alarm is display only the alarm may clear itself during operation. If alarm remains active or is repetitive replace compressor at next available opportunity.