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Indicators on the operating panel
Power-on indicator (three colors)
Lights up orange when the MU is switched off but line voltage is present. After the power cables have
been connected, it takes about 60 seconds until the MU is in standby mode.
Lights up yellow during power up delay.
Lights up green when the MU is switched on.
Flashes green when the MU has been switched on and is in standby mode or in sleep mode.
Hard disk activity indicator (green)
Flashes green when an internal hard disk drive is being accessed.
CSS
CSS and Global error indicators (yellow/orange)
Generally, the states of these indicators have the following meanings:
Do not light up when the MU is OK.
If the event is still acute after a power failure, the indicator is activated after the restart.
Light up when a prefailure event was detected. The indicator also lights up in standby mode.
Flash when an error was detected. The indicator also flashes in standby mode.
Irrespective of the color, when an indicator lights up or flashes this indicates an error event. Please notify
Customer Support when this happens.
ID
ID indicator (blue)
Lights up blue when MU has been selected by pressing the ID button. To deactivate, press the button
again.
Optical drive activity indicator
Lights up green when the storage medium is accessed. See also
If the MU is switched off and then immediately switched on again, it is only restarted after a
power up delay. This prevents a current overload, for example.
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