Hitachi Compute Rack 220H Getting Started Manual page 50

AC cable
Connect an AC cable to the AC connector of the system unit.
If you use an AC cable for 100 VAC, you need a 100VAC grounded two-pole
electrical outlet with a ground terminal.
If you use an AC cable for 200 VAC, you need a 200VAC grounded two-pole
electrical outlet with a ground terminal.
Connect the AC cable to the electrical outlet box inside the rack cabinet or an
uninterruptible power supply (UPS).
If you connect AC cables to a UPS, see
page 3-12.
3-10
Do not connect both types of power sources, 100 VAC and 200 VAC
•
to the system unit at the same time. The system unit does not
support AC power supply at different multiple voltages.
If you pull out a power plug from the system unit or an electrical
•
outlet, wait 30 seconds or more and then reconnect a power plug.
Otherwise the system unit may not start up.
If an optional power supply (BP2361-Y/BP2361-R) is installed to
•
achieve redundant configuration, you need two AC cables.
When an AC cable is connected and the system unit gets supplied
•
with AC power, both SERVICE LEDs on the front side and the rear
side of the system blinks for about 60 seconds. During this period,
the MAINTENANCE LEDs are turned off.
If you press the POWER switch while the SERVICE LEDs are
blinking, you have to wait until the blink end to start the system
unit.
When AC cables are connected and the system unit gets into
•
stand-by mode, the fans inside the power supplies start running.
Hitachi Compute Rack 220H Getting Started Guide
Uninterruptible power supply (UPS)
Installation
on