DVS Pronto3, Hardware Manual

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5-10
Pronto3 Hardware Guide
5.4 Power Supply Maintenance
The redundant power supply provides the system with power. It is a
very reliable and enduring part of the system because it consists of sev-
eral independent power supply units: Even if one fails the others will still
offer enough power to keep the system working.
When a power supply unit failure occurs, you will be notified by the
sounding of an alarm buzzer of the system. The alarm can be switched
mute with the mute button at the front of the system (see section “Op-
eration Items” on page 2-3).
Each power supply unit in the Pronto3 system is hot-swappable, so you
can safely replace it with the system running. Follow these steps to re-
place a power supply unit:
y
Take a look at the power supply at the rear of the system and
examine the LEDs of the units. The LED of the malfunctioning
power supply unit should be either extinguished or lit in red.
y
Next unplug the power cord from this power supply unit.
y
Take the handle of the respective unit and press the unit’s latch to
the right to unlock it.
y
Then pull the unit at its handle out of the power supply.
y
Change the power supply unit against a new and operable one.
y
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. However, if another one fails the system is likely to
break down. Therefore, it is recommended to change a failed
power supply unit immediately.
An alarm can be caused by a number of reasons. Please refer
to section “Troubleshooting” on page A-2 first for further de-
tails about what to do in case of an alarm.
For an overview of a power supply unit see section “Power
Supply” on page 2-11.
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.
When completely inserted please observe that the latch is
truly in place and locking the unit.