If the fan module does not go all the way into the slot, do not force it. Remove the fan module and verify
that it is the correct type for your router and in the correct orientation. To verify the status of fans and the
speed, use the
show environment fan
command.
Note
c) If the chassis is powered on, listen for the sound of the fans in operation. You should immediately hear them in
operation. If you do not hear them, ensure that the fan module is inserted completely in the chassis.
During the fan module replacement, the other fans adjust their speed to allow for proper initialization of
the new module. When you insert a new fan module, the fans may run at lower or higher speeds for a few
minutes.
Note
d) Verify that the fan module LED turns green. If the LED is not green, one or more fans are faulty. If this situation
occurs, contact your customer service representative for replacement parts.
Replace Power Supply
We recommend that you occupy both the power supply slots of the fixed port routers with power supplies. In
case a power module fails, it is recommended to retain the failed power module in its slot until it is replaced
with a new power module. This recommendation ensures that the system airflow is not impacted adversely,
which may then result in the overheating of the router and its components.
Note
Use this procedure to replace the AC or DC power supply units. Be sure to power down the fixed configuration
PDU (power distribution unit) before removing it from the chassis.
Step 1
If the power supply is connected to a AC or DC circuit, shut off the circuit at the circuit breaker.
Step 2
Disconnect the PSU cable.
Step 3
Press the tab inward to unlatch the PSU, and pull the handle to remove the PSU.
Step 4
Insert the new PSU.
If the PSU does not go all the way into the slot, do not force it. Remove the PSU and verify that it is the correct
type for your router and in the correct orientation.
Note
Step 5
Connect the PSU cable.
Step 6
If the power supply is connected to a AC or DC circuit, turn on the circuit breaker for the AC or DC power source. After
replacing the PSU, verify the power using the
show environment power
command.
Hardware Installation Guide for Cisco 8100 Series Routers
35
Replace Chassis Components
Replace Power Supply
