Allied Telesis AT-SBx31CFC960 - Manual (Page 234)

Chapter 12: Troubleshooting
234
AT-SBxPWRSYS1 and AT-SBxPWRPOE1 AC Power Supplies
A power supply is operating normally when its AC and DC LEDs are solid
green and the Fault LED is off. Possible fault conditions and their solutions
are described here:
Fault Condition 1: If the AC LED is off, the power supply is not receiving
power, has overheated and been disabled, or has failed and needs to be
replaced. Try the following:
 Verify that the power supply is installed in the correct slot in the
chassis. The AT-SBxPWRPOE1 Power Supply has to be installed
in slot A or B and the AT-SBxPWRSYS1 Power Supply has to be
installed in slot C or D.
 Verify that there is a power cord connected to the power supply’s
connector on the back panel of the chassis. For example, if a
power supply in slot C does not have power, check for a power
cord on connector C on the back panel.
 Verify that the power cord is securely connected to the chassis and
the AC power source.
 Verify that the AC power has power by connecting another device
to it.
 Verify that the power from the AC power source is within the
required levels for your region.
 If the chassis is still operating, use the SHOW PSU or SHOW PSU
ALL command from a local or remote management session to
determine if the power supply has overheated and shutdown.
Fault Condition 2: If the AC LED is solid green and the DC LED is off, the
power unit is generating insufficient DC power. Replace the power supply.
Fault Condition 3: If the Fault LED is solid amber, try the solutions in Fault
Condition 1. If they do not resolve the problem, replace the power supply.
Note
The AT-SBxPWRSYS1 Power Supply is hot swappable. If the
chassis contains two AT-SBxPWRSYS1 Power Supplies and one
unit fails, you do not have to power off the operational power supply
when you replace the failed unit.
Note
The AT-SBxPWRPOE1 Power Supply is also hot swappable. You
do not have to power off the chassis to add or replace AT-
SBxPWRPOE1 Power Supplies.