34
Replacing FRUs
CAUTION:
•
When replacing FRUs while the gateway is running, be aware of electrical safety hazards.
•
Strictly follow the replacement procedures provided in this chapter to avoid device damage or
bodily injury.
•
Wear an ESD wrist strap during the replacement and make sure the wrist strap has a good skin
contact and is correctly grounded. For more information, see "Attaching an ESD wrist strap."
The gateway uses a modular, hot-swappable architecture, and supports field replaceable units
(FRUs). You can replace any of FRUs when the gateway is running.
Replacing a power module
WARNING!
•
Do not install AC and DC power modules on the same M9000 gateway.
•
Power modules on an M9000 gateway must be the same model. When the new power modules
and the power modules operating on the gateway are not the same model, power off the gateway
and remove all power modules on the gateway before replacement.
•
Provide a circuit breaker to the power line for each power module. Before replacing a power
module, turn off its circuit breaker.
•
The power module may be of high temperature. Remove it with caution.
•
To install the removed power module to the chassis again, install it after the status LED on it is off.
Figure 31 Power module removal flow
Figure 32 Power module installation flow
The replacement procedures for the AC and DC power modules are the same. To replace a power
module:
1.
Prepare an antistatic mat to place the removed power module.
2.
Turn off the circuit breaker.
3.
Remove the power cord plug from the power module.
{
AC power cord
—Remove the cable ties from the power cord, and remove the power cord
plug from the power module.
{
DC power cord
—Remove the cable ties from the power cord, loosen the fastening screw
on the power cord, and remove the power cord plug from the power module.
4.
Use a Phillips screwdriver to loosen the captive screw on the power module, and then grasp the
captive screw between your thumb and index finger to carefully pull out the handle on the power
module.
5.
Holding the power module handle with one hand and supporting the bottom of the power
module with the other, gently pull the power module out.
