H3C S5120-9P-SI Installation Manual

Contents

H3C S5120-9P-SI Installation Manual Manual pdf 70 page image

62Power supply failureThe S5120-28P-HPWR-SI adopts AC power input, RPS power input, or both RPS and AC power inputs.Other S5120-SI switches adopt AC power input only.You can determine whether the power system of a switch functions properly by viewing the power LED orRPS power LED on the front panel.With AC power inputWhen AC power input is used for power supply of a switch, you can check the power LED. The powerLED stays on when power system is normal. Otherwise, please check whether:• The power cord is correctly connected, the power receptacle on the switch and the AC power socketfunction normally.• The power input to the switch is normal.• The operating temperature of the switch is in the appropriate range and good ventilation is ensuredfor the power supply unit. PoE switches support over-temperature protection, allowing the internalpower module to enter the protection state if the temperature is too high and then restore powersupply after the temperature becomes normal.With RPS power inputWhen RPS power input is adopted, you can check the power LED or RPS power LED to judge the statusof the power system. Both LEDs stay on when the power system functions normally. Otherwise, pleasecheck whether:• The RPS DC power cord is correctly connected.• The RPS power supply is normal.• The operating temperature of the switch is in the appropriate range and good ventilation is ensuredfor the power supply unit. PoE switches support over-temperature protection, allowing the internalpower module to enter the protection state if the temperature is too high and restore power supplyafter the temperature becomes normal.With both AC and RPS power suppliesWhen both the AC and RPS power supplies are adopted, you can check the power LED and the RPSpower LED to determine the status of each power input.1. The power LED is off.In this case, both the AC and RPS power inputs are abnormal. Please check that:• The power cord is correctly connected, the power receptacle on the switch and the AC power socketfunction normally.• The AC power input to the switch is normal.• The RPS DC power cord is correctly connected and the RPS power supply is normal.• The operating temperature of the switch is in the appropriate range and a good ventilation isensured for the power supply unit. PoE switches support over-temperature protection, allowing theinternal power module to enter the protection state if the temperature is too high and then restorepower supply after the temperature becomes normal.2. The power LED is on while the RPS LED is off.The RPS power input is abnormal, please check that:• The RPS DC power cord is correctly connected.

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