OVERLOAD SHUTDOWN Vertiv — Output Overload
At a glance
- Severity
- WARNING THEN STOP
- Domain
- UPS_SYSTEM
- Reference standard
- IEC 62040-3
What it means
The connected load exceeds the rated output current: the UPS alarms and, beyond threshold, transfers to bypass or shuts down to protect the inverter.
Probable causes
- Total load beyond the UPS kVA/kW rating
- Phase imbalance on a three-phase UPS
- Inrush current peak (rack power-up, PSU inrush)
- Short circuit or failed power supply downstream
- Load power factor worse than the design value
Where to start
Read the load percentage per phase (or total on single-phase) from the display or management card.
Full guided diagnosis in the app
The diagnostic tree for this fault has 4 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 Vertiv codes
- BATTERY TEST FAILED — Replace Battery / Battery Fault
- ON BYPASS — On Bypass / Inverter Fault
- OVERTEMP — Internal Overtemperature
- RECTIFIER FAULT — Rectifier / Charger Fault (DC Bus)
- UTILITY FAIL — On Battery / Utility Failure
- HIGH HEAD PRESSURE — High Head Pressure Alarm
- HUMIDIFIER FAULT — Humidity Control Fault
- LEAK DETECTED — Water Leak / Condensate Overflow