Keedian operations · Standard procedure

High discharge pressure sustained.

The rack holds discharge (high-side) pressure above its commissioned high-discharge setpoint for longer than its delay. Sustained high-side pressure loses capacity across every case the rack feeds and, unaddressed, walks toward a protection trip.

01 Detail

Trigger, action plan, and escalation criteria.

optimization_metric refrigeration high managed tier AI: hybrid

Related metric: refrigeration_rack_discharge_pressure
Trigger: discharge_pressure > High Dsch Setpt, sustained ≥ High Dsch Dely (feed health confirmed)
Value drivers: Operational continuity Product loss prevention Asset lifespan
Preconditions: Rack controller exposes discharge pressure and the High Dsch Setpt / High Dsch Dely commissioning values; feed health confirmed; values calibrated per rack.
Human role: Primary when a dispatch to the refrigeration vendor is required; secondary review after AI on validation and correlation.
Action plan: (1) Confirm the sustained condition against High Dsch Setpt / High Dsch Dely, not an instantaneous spike; rule out a stale controller feed. (2) Correlate rack-wide case temperatures — high discharge that is starving cases raises priority to a product-protection issue. (3) Check common controllable causes exposed by the controller (condenser fans/staging, a dirty or blocked condenser, ambient) and attempt a remote correction where available. (4) If unresolved or trending toward the trip threshold, dispatch the refrigeration vendor with the pressure and correlation evidence.
Escalation: (1) Discharge approaching the configured trip threshold → treat as imminent rack loss; alert store and customer ops, dispatch within SLA. (2) Multiple cases on the rack drifting out of band at once → escalate the rack, not the individual cases.
Prevention: (1) Calibrate High Dsch Setpt / High Dsch Dely per rack so a real sustained excursion is distinguished from a normal transient. (2) Review condenser condition and staging at cadence — a fouling condenser is the leading controllable cause of rising discharge pressure.