00013critical
High Discharge Pressure
refrigeration
Description
Refrigerant discharge pressure is too high.
Activation Conditions
HPS (High Pressure Switch) contacts open.
Unit Behavior
Shutdown.
Reset Conditions
Auto reset after 15 minutes.
Corrective Actions
1. Check system pressures. 2. Check airflow through the condenser — remove any debris. 3. Run the automated Pretrip test. 4. Check refrigerant charge level (should be 18.2 lbs R-452A). 5. Check HPS wiring and connections.