H3C S5120-EI Series Installation Manual

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H3C S5120-EI Series Installation Manual Manual pdf 81 page image

6-2Power Supply FailureThe S5120-EI series switches use fixed power modules. Each of these fixed power modules has threeinput 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 descriptionLED Mark Status DescriptionSystemstatusLEDPWR Off The switch is powered off.Steady green The AC input is normal, and the RPS is in the position orworks normally.Steady yellow RPS input is normal, but AC input fails or AC input is notconnected.RPSstatusLED(non-PoEswitches)RPSOff RPS is not connected.Steady green The AC input and the RPS input work normally.Steady yellow The RPS input is normal, but the AC input fails or AC inputis not connected.RPSstatusLED(PoEswitches)RPSOff RPS input is abnormal.AC inputWhen the switch adopts AC input, you can check the power supply status by viewing the system statusLED. If the system status LED is off, an AC input failure occurs. Then do the following:z Check whether the AC power cord is well connected to the switch, whether the AC receptacle onthe 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 isprovided to the power supply (the power module may stop working and enter the protection statedue to over-temperature).RPS inputWhen the switch adopts RPS input, you can check the power supply status by viewing the systemstatus LED or RPS status LED. If the system status LED or RPS status LED is off, an RPS input failureoccurs. 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 isprovided to the power supply (the power module may stop working and enter the protection statedue to over-temperature).RPS&AC inputWhen the switch adopts both RPS and AC inputs, you can check the power supply status and the inputstatus of each line by viewing the system status LED and RPS status LED.