Operating instructions

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2.5.4 FAN MONITORING
The separately ventilated power controllers (-...HF) are fitted with thermal monitoring. The tempe-
rature is measured on the heat sink. In case of a temperature overrange, a fault indication is issued:
Unit excess temp.
As a standard the device will be switched off and LED Overheat will be lit.
ATTENTION
When using the device under UL conditions, this feature has to be switched on.