PUMP FAULT York — Pump Failure / Loss of Flow
At a glance
- Severity
- FAULT STOP
- Domain
- CHILLED_WATER_SYSTEM
- Reference standard
- EN 50600-3-1 / ISO 9906
What it means
Pump failure or flow loss: room units run out of chilled water even with healthy chillers. Redundant pumps cover the single failure.
Probable causes
- Mechanical seal wear and leaks
- Cavitation (suction, air in circuit, filters)
- Motor failure or thermal protection
- Differential pressure switch out of calibration
Where to start
Verify which pump stopped, the standby status (auto-start?) and differential pressure at the headers.
Full guided diagnosis in the app
The diagnostic tree for this fault has 3 guided steps with measurements, checks and resolutions. You'll find it in DataCIQ, one of the five IndexOS apps: free, works offline.
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The same fault on other brands
More York codes
- FLOW LOSS — Hydraulic Circuit Leak