Whether the rack's pump-down sequence completes as commissioned — reaching its pump-down setpoint within its delay, not aborting, and not repeating abnormally. A pump-down that fails to reach setpoint, is left incomplete, or short-cycles risks liquid return and compressor damage. Setpoint and delay alone do not activate the metric: it requires a pump-down request / state plus suction pressure and timestamps as evidence the sequence actually ran.
The table below summarizes the alarms that fire directly from Rack Pump-Down Performance. Each row links to the full operational detail (trigger, preconditions, action plan, human role, escalation, prevention) in the SOPs catalog.
| Alarm | Description | Severity | Tier | AI executes? | Value drivers | SOP |
|---|---|---|---|---|---|---|
| Pump-down does not reach setpoint | A pump-down request fails to reach its configured Pump Down Setpt within Pump Down Delay. An incomplete pump-down leaves refrigerant where it should not be and risks liquid return and compressor damage on the next start. | High | Managed | Hybrid | Asset lifespan · Operational continuity · Energy savings | Open SOP → |
| Pump-down aborted or incomplete | A pump-down sequence is aborted or left incomplete before it finishes. As with a pump-down that never reaches setpoint, an aborted sequence risks liquid return and compressor damage and points to a controls or valve fault. | High | Managed | Hybrid | Asset lifespan · Operational continuity · Energy savings | Open SOP → |
| Pump-down repeats abnormally | The pump-down sequence repeats more often than the commissioned observation window expects — a short-cycling pattern that stresses compressors and points to a leak-back, valve, or control fault rather than a single failed sequence. | High | Managed | Hybrid | Asset lifespan · Operational continuity · Energy savings | Open SOP → |
The action plan for each alarm lives on its own SOP page in the SOPs catalog — with the diagnostic steps, human role, value drivers, escalation, and prevention specific to that alarm. The list below maps each alarm to its SOP.