Install guide

12 AT-PWR01 Power Supply and Fan
Troubleshooting
If the PSU does not function as expected:
■ Check that all cable connections are correct and secure.
■ Check that the standby switch has been pressed and is in the ON position
(DC models).
■ Check that the PSU is receiving the correct AC voltage (AC models).
■ Replace the PSU or have the PSU serviced by your authorised distributor
or reseller if the LEDs indicate a PSU fault.
More troubleshooting information is described in the Hardware Reference for
your switch.
PSU 2 Green PSU 2 is installed and supplying power to the
switch, and the voltage output is within
specification.
Red PSU 2 is installed in the switch and either a fan has
failed, or the PSU has exceeded its recommend
temperature threshold of 75º C (167º F).
A FOM is installed in the switch and a fan has
failed.
The bay is empty.
Not lit A FOM is installed and the fan is good.
Table 1-2: PSU LEDs on the switch (Continued)
LED State Function
pwr01qig.fm Page 12 Thursday, September 2, 2004 9:24 AM