OVERLOAD Eaton — 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.

Open DataCIQ

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The same fault on other brands

More Eaton codes

BATTERY FAULT — Replace Battery / Battery Fault
ON BATTERY — On Battery / Utility Failure
ON BYPASS — On Bypass / Inverter Fault
RECTIFIER FAULT — Rectifier / Charger Fault (DC Bus)
TEMPERATURE HIGH — Internal Overtemperature