HP 12500 Series Installation Manual page 87

Figure 59 LEDs on a DC power supply
(1) Input status LED
Table 28 Power supply LED description
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 operate properly.
To troubleshoot the power supply system:
Check the power cable connections. If a power cable is loose, re-plug the power cable.
1.
Replace the power cable, and check whether the LEDs are normal.
2.
Check the power supply installation. If the power supply is not fully seated, re-install the power
3.
supply to make sure it makes close contact with the backplane of the switch.
Check the power source. Make sure the power source operates properly and provides a normal
4.
voltage.
Check whether the power supply has encountered output short circuit, output over-current, output
5.
over-voltage, input under-voltage, or over-temperature problems.
Plug the power supply into an empty power supply slot, and verify that the power supply can
6.
operate properly. If the power supply can operate properly, the power supply slot may have failed.
Otherwise, proceed with the next step.
Plug a new power supply that can operate properly into the same power supply slot, and connect
7.
it to the same power source. If the new power supply can operate properly, the old power supply
fails. Contact the agents to replace the old power supply.
(2) Output status LED
Status
Steady on
Off
Flashing
Steady on
Off
Flashing
Steady on
Off
Steady on
Off
81
(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 has occurred.
The power supply is operating properly.
The power supply is faulty.
The power supply is operating properly.
(4) Fault LED