Power LED

Applies to:

Power LED indicator states

LED state Symbol Meaning
Off

No power.

The device is not powered.

Solid green

Power OK.

The main power distribution network is operational.

Solid red

Power NOK.

Possible causes are:

There is no power delivered on the +24 V power input
At least one power converter of the main power distribution network is unable to operate properly. This might be caused by excessive temperature due to inadequate device cooling, accidental short-circuits having blown one (or more) protection fuses, inappropriate supply voltages, etc.