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Table 2. Power module LEDs
AC IN
DC OUT
On
On
On
Off
Off
Off
On
On
! (Error)
(amber)
Description and action
Off
The power module is on and operating
correctly.
Off or On* There is an output power problem. A system
error has shut down the power module.
Actions: Determine the cause of the
shutdown using the diagnostics and replace
the failed component. When the fault has
been cleared, reset the power module in one
of the following ways:
v Issue a power-module reset through the
management module.
v Remove the power module from the unit
for at least 10 seconds.
If the problem remains, have the unit
serviced. *Error LED will operate only if a
redundant power supply is installed.
Off or On* There is an input power problem. Possible
causes:
v There is no power to the power module.
Actions: Make sure that:
1. The power is correctly connected to the
unit.
2. The power is connected to 110 v ac or
220 v ac.
3. The power source functions properly.
v The power module has failed. Action:
Replace the power module.
If the problem remains, have the unit
serviced. *Error LED will operate only if a
redundant power supply is installed.
On
There is a fault condition in the power
supply. Possible causes:
v Thermal fault. Action: Replace the power
module.
v 12 v over-voltage power condition or 12 v
under-voltage power condition. Actions:
Determine the cause of shutdown using
diagnostics and replace the failed
component. When the fault has been
cleared, reset the power module.
– Issue a power-module reset through the
management module.
– Remove the power module from the
unit for at least 10 seconds.
Chapter 1. General information
11
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