Symptom: High Suction Pressure

Possible Cause: Overfeeding of TXV.
Corrective Action: Remove head and check valve operation. Replace if defective.
Possible Cause: Inadequate system capacity.
Corrective Action: Check system load (return/mixed air conditions and unit airflow) and compare to submitted values. Adjust start point for second circuit (if applicable) or add additional units to handle the required load.
Possible Cause: Inadequate compressor capacity.
Corrective Action: Check operation of hot gas bypass valve (if applicable). Adjust digital scroll set point/PID settings (if applicable). Check amp draw and ohm out compressor to ensure compressor has not been damaged; replace if necessary.