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Field Replaceable Units
Citrix NetScaler field replaceable units (FRU) are NetScaler components that can be
quickly and easily removed from the appliance and replaced by the user or a technician
at the user's site. The FRUs in a NetScaler appliance can include a CompactFlash card,
DC or AC power supplies, and solid-state or hard-disk drives, and a direct attach cable
(DAC).
Note: The solid-state or hard-disk drive stores your configuration information, which
has to be restored from a backup after replacing the unit.
Power Supply
For appliances containing two power supplies, the second power supply acts as a
backup. The MPX 22040/22060/22080/22100/22120 can accommodate four power
supplies, and require two power supplies for proper operation. The third and fourth
power supplies act as backup.
The appliance ships with a standard power cord that plugs into the appliance’s power
supply and an NEMA 5-15 plug on the other end for connecting to the power outlet on
the rack or in the wall.
For power-supply specifications, see "Hardware Platforms," which describes the various
platforms and includes a table summarizing the hardware specifications.
Note: If you suspect that a power-supply fan is not working, please see the description
of your platform. On some platforms, what appears to be the fan does not turn, and the
actual fan turns only when necessary.
For each power supply, a bicolor LED indicator shows the condition of the power supply.
The LEDs of the AC power supplies for MPX 15000 and 17000 appliances are different
from the LEDs of the other appliances.
Table 1-15. LED Power Supply Indicators
Power Supply Type LED Color LED Indicates
AC OFF No power to any power
supply.
Flashing RED No power to this power
supply.
Flashing GREEN Power supply is in standby
mode.
GREEN Power supply is functional.
RED Power supply failure.
Chapter 1 Introduction to the Hardware Platforms
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