Nortel Contivity 5000 Installing page 81

Chapter 4 Installing option cards and field replaceable units 81
If a power supply fails, the following indicators report the failure:
• LED on the power supply lights yellow.
• Front-panel Fail LED lights red.
• Audible alarm beeps.
• Event and system logs report the failure.
Replace a failed power supply as soon as possible.
Caution: Two power supplies must be installed to ensure proper
airflow. If a power supply fails and you do not have a replacement power
supply, leave the failed power supply installed until a replacement is
available.
You can replace a power supply with the system power on or off. (To turn off the
system, see "Shutting down the system to add or replace hardware" on page
To replace a power supply:
1
Attach the antistatic wrist strap that was shipped with the Contivity 5000 (see
"Attaching the antistatic wrist strap" on page
2
Remove the failed power supply from the chassis.
a
Squeeze up on the metal portion of the power supply handle that is on the
underside of the handle
b Pull on the handle to remove the power supply from the chassis.
As you pull on the handle, the handle rotates to the left.
Caution: The power supply will feel hot to the touch, even if the
Contivity 5000 has been turned off. The power supply is operating as
designed.
c
Support the bottom of the power supply as you pull it free of the chassis.
When you remove a power supply, the Contivity 5000 automatically
redistributes the power load to the remaining power supply.
68).
(Figure 36).
Installing the Contivity 5000
63.)