TEMPERATURE HIGH Eaton — Internal Overtemperature

At a glance

Severity: WARNING THEN STOP
Domain: UPS_SYSTEM
Reference standard: ASHRAE TC9.9 / IEC 62040-1

What it means

Internal temperature beyond limit: failed fans, clogged filters or inlet air too warm. The UPS derates its output power and beyond threshold goes into protection.

Probable causes

Room temperature above ASHRAE guidelines (18-27 C equipment inlet)
Internal fans failed or impellers dirty
UPS filters saturated
Inlet/outlet air clearances not respected
Hot air recirculation back to the UPS inlet

Where to start

Measure the UPS inlet air temperature and the room temperature. ASHRAE reference: 18-27 C at equipment inlet.

Full guided diagnosis in the app

The diagnostic tree for this fault has 5 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
OVERLOAD — Output Overload
RECTIFIER FAULT — Rectifier / Charger Fault (DC Bus)