H3C S12500 Installation Manual page 100

Figure 55 LEDs on a DC power supply
(1) Input status LED
Table 28 Description of power supply LEDs
LED
Input status LED
Output status LED
Over-temperature alarm LED
Fault LED
When the input/output LEDs are off or the fault LEDs are on, the power supply does not work properly.
Follow these steps to troubleshoot the power supply system:
Check the power cable connections. If a power cable is loose, re-plug the power cable.
Step1
Replace the power cable, and check whether the LEDs are normal.
Step2
Check the power supply installation. If the power supply is not fully seated, re-install the power supply to
Step3
make sure it makes close contact with the backplane of the switch.
Check the power source. Make sure that the power source works properly and provides a normal
Step4
voltage.
Check whether the power supply has encountered output short circuit, output over-current, output
Step5
over-voltage, input under-voltage, or over-temperature problems.
Plug the power supply into an empty power supply slot, and check whether the power supply can work
Step6
properly. If the power supply can work properly, the power supply slot may have failed. Otherwise,
proceed with the next step.
Plug a new power supply that can work properly into the same power supply slot, and connect it to the
Step7
same power source. If the new power supply can work properly, the old power supply fails. Contact the
agents to replace the old power supply.
(2) Output status LED
Color Status
On
Green
Off
Flashing
On
Green Off
Flashing
On
Yellow
Off
On
Red
Off
90
(3) Over-temperature alarm LED
Description
The power is input properly.
No power is input.
The input power exceeds the threshold.
The power is output properly.
No power is output.
The power output is overloaded.
An over-temperature alarm occurs.
The power supply works properly.
The power supply is faulty.
The power supply works properly.
(4) Fault LED