HP 5500 EI series - Maintenance and Troubleshooting; Power Supply Failure; Built-In Power Supply Failure

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Maintenance and troubleshooting
Power supply failure
Built-in power supply failure
Except the 5500-24G-SFP EI (2 slots) and 5500-24G-SFP EI TAA (2 slots) switches, all 5500 EI and 5500
SI switches use built-in power supplies and support three input modes: AC input, RPS DC input, and
concurrent AC and RPS DC inputs.
You can look at the system status LED and the RPS status LED on the front panel of the switch to identify
a power failure. For more information, see "LEDs."
AC input
If the system status LED is off, an AC input failure has occurred. Verify the following items:
• The AC power cord is securely connected to the switch, and the AC-input power receptacle on the
switch and the connected AC power outlet are in good condition.
• The external AC power system is correctly working.
• The operating temperature of the switch is in the normal range, and the power module has good
ventilation. Over-temperature can cause the power module to stop working and enter the protection
state.
RPS DC input
If the system status LED or RPS status LED is off, an RPS input failure has occurred. Verify the following
items:
• The switch is securely connected to the RPS.
• The RPS is correctly working.
• The operating temperature of the switch is in the normal range, and the power supply has good
ventilation. Over-temperature can cause the power supply to stop working and enter the protection
state).
Concurrent RPS and AC inputs
1. If the system status LED is off, the AC power supply and the RPS both have an input failure.
Verify the following items:
{ The AC power cord is securely connected to the switch, and the AC-input power receptacle on
the switch and the connected AC power outlet are in good condition.
{ The external AC power system is correctly working.
{ The switch is securely connected to the RPS.
{ The RPS is correctly working.
{ The operating temperature of the switch is in the normal range, and the power supply has good
ventilation. Over-temperature can cause the power supply to stop working and enter the
protection state.