H3C Technologies H3C S5800 Series Switches - Manual (Page 16)

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Step4 Examine the LED on the power module. If the LED is steady
green, the power cable is successfully connected. If the LED is
off or red, examine the installation conditions, troubleshoot the
problems, and try again until the LED is normal.
Removing the power module
To avoid bodily injury or device damage, follow the steps in Figure 8 to
remove the power module.
Figure 8 Power module removing procedure
Step1 Turn off the circuit breaker of the power cable.
Step2 Put on the ESD-preventive wrist strap, making sure the strap
makes good skin contact and is well grounded.
Step3 Loosen the cable tie, and take off the power cable. When
removing a DC power cable, squeeze the tabs on the power
cable connector with your thumb and forefinger and then pull
the connector out.