TEMPERATURE HIGH Rittal — Rack / PDU Overtemperature
At a glance
- Severity
- WARNING THEN STOP
- Domain
- POWER_DISTRIBUTION_SYSTEM
- Reference standard
- ASHRAE TC9.9 / IEC 61439-2
What it means
Temperature inside the rack or the PDU exceeds limits: compromised airflow or overload. Protection derating and server shutdown risk.
Probable causes
- Missing blanking panels and hot air recirculation inside the rack
- Cold aisle inlet temperature above range
- Rack fan tray failed or absent
- Cabling obstructing front-to-rear airflow
- PDU overload with self-heating
Where to start
Measure rack inlet temperature (front, cold aisle) and outlet (rear, hot aisle) and compare with ASHRAE guidelines.
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.
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The same fault on other brands
More Rittal codes
- CURRENT HIGH — Branch Circuit Overload / Breaker Trip
- PHASE ASYMMETRY — Phase Imbalance