Power Supply; Power Supply Units; Replacing A Power Supply Unit - Cisco C880 M4 Operating Manual

4. Power Supply

4.1. Power Supply Units

The storage subsystem contains two power supply units that guarantee the power supply to all the fitted
components. If one power supply unit fails, the system will carry on running (redundant power supply).
PSU#0
Figure 10: storage subsystem with two power supply units (#0, #1)
The power supply units are supplied with mains voltage via the supplied connecting leads.
The two power supply units can be connected directly to two different phases of the in-house circuit in
order to achieve phase redundancy (see
4.1.1.

Replacing a Power Supply Unit

CAUTION!
It is imperative that you read the
carry out work on your storage subsystem.
If faults occur with the power supply unit, it could be necessary to replace a power supply unit. Information
about the relevant error messages can be found in the sections
"
Status LED of the Power Supply Units
CAUTION!
When replacing a power supply unit, do not leave it removed for longer than 5 minutes to prevent
temperature rise.
18
section "
Mains Connection
chapter "
Important Notes
" on page 15
and in the
Operating Manual
PSU#1
" on
page28).
" on page 7
in this manual before you
"
Operating Status LEDs
chapter "
Fault Clearing
4.1Power Supply Units
" on page 13
and
" on page
37.