Instruction manual

4. Installation of the Components
179
4.13 Powering the external power unit (EPU) on or off
4.13.1 EPU-A
(1) Power on
[Step 1]
Turn on the main power switch on the back face of the EPU.
Figure 4-59 Power on (main body of the EPU)
(1) Main power switch
CAUTION
Prior to turn on the main switch of the EPU, make sure all power switches of the
inserted power supply modules are turned off.
[Step 2]
Turn on the power supply modules.
Figure 4-60 Power on (power supply module)
(1) Power switch
(2) Power off
Turn off the main switch of the EPU to shut off all backup power supply units to the device.
[Step 1]
Turn off the power supply modules.