Allied Telesis IE340 Series, Installation Manual, Page: 120 / 136

IE340 Series Installation Guide
120
PWR 1 and PWR 2 LEDs
Problem: A DC power supply is connected to the switch, but the
corresponding PWR 1 or PWR 2 LED on the front panel is off.
Solutions: The unit is not receiving power from the power supply or the
power is outside the operating range of the switch. Try the following:

Verify that the DC power source is powered on and operating
normally.

Review the DC power source’s documentation to verify that it is
compatible with the switch. The power supply requirements for the
switch are given in “Power Supplies” on page 49.

Verify that the PWR 1 -PWR 2 connector is fully inserted into the
slot in the top panel of the switch.

Verify that the DC wires are securely connected to the PWR 1 -
PWR 2 connector on the switch and to the DC power supply.

Verify that the DC positive and negative wires from the power
supplies are connected to the correct connectors on the DC PWR
1 - PWR 2 connectors on the switch.

Verify that the DC power wires are connected to the PWR 1 - PWR
2 connector and not to the ALM IN or ALM OUT connector.

Try using a different DC power source.

Try replacing the DC power wires.

Try connecting the DC power source to a different device.

Test the output voltage from the power source to verify that it is
within the operating range of the switch.