Specifications

5-9
Maintenance
2
1
3
I
4
A
5
5.3 Power Supply Maintenance
The redundant power supply provides the system with power. It is a re-
liable and enduring part of the system because it consists of two inde-
pendent power supply units: Even if one fails, the other will still offer
enough power to keep the system working.
When a power supply unit failure occurs, you will be notified by the lit
alarm LED within the operation items and the sounding of an alarm
buzzer of the system. Additionally, you will be informed via E-mail noti-
fication, if your server is configurated appropriately.
Each power supply unit in the DVS system is hot-swappable, so you
can safely replace it with the system running. Follow these steps to re-
place a power supply unit:
 Take a look at the power supply at the rear of the system and exam-
ine the LEDs of the units. The LED of the malfunctioning power
supply unit should be extinguished.
 Next unplug the power cord from this power supply unit.
 Take the handle of the respective unit and press the unit’s latch to
the right to unlock it.
 Then pull the unit at its handle out of the power supply.
 Change the power supply unit against a new and operable one.
 Slide the new unit into the power supply until it clicks into place.
The system can be operated with one power supply unit out
of order. If the other power supply unit fails in the meantime,
your system will be inoperable. Change a failed power supply
unit immediately.
An alarm can be caused by a number of reasons. For example,
an extinguished LED at a power supply unit can mean a stand-
by mode, too. Please refer to section “Troubleshooting” on
page A-2 first for further details about what to do in case of an
alarm.
When operating the DVS system, it is recommended to check
the state of the alarm LED (see section “Operation Items” on
page 2-6) at regular intervals.
For an overview of a power supply unit see section “Power
Supply” on page 2-16.
Do not reach inside the system when removing a power
supply unit or when the unit is out of the system.
Only use original manufacturer spare parts. Other spare
parts might damage your system.