Do you know how to Replace a Power Module or Fan Module?

Some switch models support pluggable power modules and fan modules. Figure shows
the fan module slots and power module slots on Huawei S6700-EI switch as an example.

Before replacing a power module, ensure that the switch is powered by the other power
module. Replacing the only power module of a switch will interrupt services.
If two power modules are installed in a switch, they work in 1+1 backup mode. Replacing
one power module will not interrupt services. If you are replacing both power modules,
replace the second one only after the first replaced one is working (its indicator is steady
green).

Tools and Accessories
ESD wrist strap or ESD gloves
Phillips screwdriver
Procedure
Step 1 Wear an ESD wrist strap or ESD gloves. When wearing an ESD wrist strap, ensure that it is in
close contact with your wrist and grounded properly.
Step 2 Turn off the power module.
Step 3 Remove the power cable from the power module. The procedure for removing a power cable
is the reverse of the procedure for installing the power cable.
Step 4 Remove the power module from the Huawei switch.
1. Use a Phillips screwdriver to loosen the captive screw on the power module.
2. Holding the handle, gently pull out the power module.

Step 5 Install the replacement power module in the switch.

Step 6 Connect the power cable to the new power module.

Step 7 Turn on the power module.
Step 8 Use either of the following methods to check whether the new power module is working
normally:
Observe the STATUS indicator on the panel. If the indicator is steady green, the power
module works normally.
Run the display device command to check the running status of the new power module.

Follow-up Procedure
If the new power module does not work normally, contact the equipment supplier or local
maintenance personnel for technical support.