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Figure 1-12. Inserting the Replacement AC Power Supply
5. Connect the power supply to a power source. If connecting all power supplies, plug
separate power cords into the power supplies and connect them to separate wall
sockets.
Note: NetScaler appliances emit a high-pitched alert if one power supply fails or if you
connect only one power cable to an appliance in which two power supplies are
installed. To silence the alarm, press the small red button on the back panel of the
appliance. The disable alarm button is functional only when the appliance has two
power supplies.
Replacing a DC Power Supply
Citrix NetScaler MPX platforms can accommodate two power supplies, except the MPX
22040/22060/22080/22100/22120 platform which can accommodate four power
supplies. All NetScaler appliances function properly with a single power supply, except
the MPX 22040/22060/22080/22100/22120 platform which needs two power supplies
for proper operation. The other power supplies serves as a backup. All power supplies
must be of the same type (AC or DC).
Note: If the appliance has only one power supply, you have to shut down the
appliance before replacing the power supply. If the appliance has two power supplies,
you can replace one power supply without shutting down the appliance, provided the
other power supply is working, and if the appliance has four power supplies, you can
replace one or two power supplies without shutting down the appliance, provided the
other two power supplies are working.
To install or replace a DC power supply on a Citrix NetScaler appliance
1. Loosen the thumbscrew and press the lever towards the handle and pull out the
existing power supply, as shown in the following figure.
Note: The illustration in the following figures might not represent the actual
NetScaler appliance.
Citrix NetScaler Hardware Installation and Setup Guide
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