6-2
Power Supply Failure
Fixed Power Module Failure
Each model of the S5500-SI series (except the S5500-20TP-SI) provides two fixed power inputs. You
can use the two power inputs at the same time for redundancy or use one power input. Such switch
models support three power input modes, namely, AC input, RPS input and both.
You can check whether the power system of the switch fails by viewing the system status LED (PWR)
and RPS status LED (RPS) on the front panel of the switch. For details, refer to
Table 6-1
.
Table 6-1
Fixed power module failure LEDs description for S5500-SI series (except S5500-20TP-SI)
LED
Mark
Status
Description
System status LED
PWR
Off
The switch is powered off.
Steady yellow
The RPS input is normal, but the AC input fails or
is not connected.
RPS status LED
(S5500-28C-SI and
S5500-52C-SI)
RPS
Off
RPS is not connected.
Steady yellow
The RPS input is normal, but the AC input fails or
is not connected.
RPS status LED
(S5500-28C-PWR-SI
and
S5500-52C-PWR-SI)
RPS
Off
The RPS input is abnormal.
AC input
When the switch adopts AC inputs alone, if the system status LED is off, an AC input failure occurs.
Then do the following:
z
Check whether the power cord is well connected to the switch, whether the AC receptacle on the
switch and the AC power socket are faulty.
z
Check whether the external AC power supply system is normal.
z
Check whether the operating temperature of the switch is normal, and whether good ventilation is
provided to the power supply (the power module may stop working and enter the protection state
due to over-temperature).
RPS input
If the system status LED or RPS status LED is off, an RPS input failure occurs. Then do the following:
z
Check whether the switch is well connected to the external RPS power supply.
z
Check whether the external RPS power supply works normally.
z
Check whether the operating temperature of the switch is normal, and whether good ventilation is
provided to the power supply (the power module may stop working and enter the protection state
due to over-temperature).
RPS&AC input
When the switch adopts both RPS and AC inputs, you can check the power supply status and the input
status of each line by viewing the system status LED and RPS status LED.
1) The system status LED is off.
Both the AC input and RPS input are faulty. Then do the following:
