H3C Technologies H3C S5560 Series Switches - Manual (Page 58)

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Maintenance and troubleshooting
Power module failure
Fixed power module failure
The S5560-30S-EI and S5560-54S-EI switches use fixed power modules, and support three power input
modes: AC input, RPS DC input, and concurrent AC and RPS DC inputs.
Look at the system status LED and the RPS status LED of the switch to identify power system failure.
Table 9 Description for the power failure indication LEDs
LED Mark Status Description
System
status
LED
SYS Off The switch is powered off.
RPS
status
LED
RPS
Steady green
The AC input is normal, and the RPS is in position or operating
correctly.
Steady yellow
RPS power input is normal, but AC input has failed or AC input is
not connected.
Off No RPS is connected.
AC input
• Symptom
The system status LED is off.
• Solution
To resolve the problem:
a. Verify that 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.
b. Verify that the external AC power system is operating correctly.
c. Verify that the operating temperature of the switch is in an acceptable range, and the power
module has good ventilation. Over-temperature can cause the power module to stop working
and enter protection state.
d. If the problem persists, contact H3C Support.
RPS DC input
• Symptom
The system status LED or RPS status LED is off.
• Solution
To resolve the problem:
a. Verify that the switch is securely connected to the RPS.