Upvel UP-309GEW, Quick Installation Manual

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UP-309GEW
8 Quick Installation Guide
Troubleshooting
The LEDs on the front panel can help you diagnose network failures. This
section describes common problems and ways to fix them.
1. If the LNK/ACT LED is off after connecting a device:
 check the network interfaces of the connected device and the
switch;
 make sure that the network cable is not damaged and is firmly
connected to the ports of both network interfaces (of the switch
and the device you intend to connect);
 make sure that the length of the cable does not exceed the
specified limit (100 meters / 328 feet).
2. If the PWR LED is off after plugging the power cord into the AC
power connector of the switch and into the mains outlet:
 check the presence of power in the outlet;
 make sure that the power cord is not damaged and is firmly
plugged into the AC power connector of the switch and into the
mains outlet.
3. If the PWR LED lights up after plugging the power cord, but then
turns off after a while:
 check that there are no excessive voltage drops in your electric
grid;
 make sure the power cable is not tightened (it can cause
inadvertent unplugging).
If the above steps do not resolve the problem, please contact
the service center.