3Com 4210G manual Power Supply Failure, RPS input, RPS&AC input

Power Supply Failure

The Switch 4210G use fixed power modules. Each of the Switch 4210G has three 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 6-1Fixed power module failure LEDs description

LED	Mark		Status		Description
System status	PWR	Off			The switch is powered off.
LED
			Steady green		The AC input is normal, and the RPS is in the position
					or works normally.
RPS status
LED (non-PoE	RPS		Steady yellow		RPS input is normal, but AC input fails or AC input is
switches)					not connected.
			Off		RPS is not connected.
			Steady green	The AC input and the RPS input work normally.
RPS status
					The RPS input is normal, but the AC input fails or AC
LED (PoE	RPS		Steady yellow
					input is not connected.
switches)
			Off		RPS input is abnormal.

AC input

If the system status LED is off, an AC input failure occurs. Then do the following:

z

z

z

Check whether the AC power cord is well connected to the switch, whether the AC receptacle on the switch and the AC power socket are faulty.

Check whether the external AC power supply system is normal.

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

z

z

Check whether the switch is well connected to the external RPS power supply. Check whether the external RPS power supply works normally.

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:

6-2