Allied Telesis Removable Power Supply and Fan - Manual (Page 12)

Installation Guide
11
2. Plug the AC power cable into the power inlet on the PSU.
3. Connect the power cable to the main power source.
4. Check that the Run/Standby switch is set to the Run position (1). Both the
AC IN and DC OUT LEDs should be lit.
Note that when the Run/Standby switch is set to the Standby position (O),
the AC IN LED lights and the fan spins, but the DC OUT LED does not
light and the PSU does not deliver power to the device.
5. The PSU LED on the front panel of the switch lights green. If the LED does
not light green, check the Run/Standby switch. See the Hardware Reference
for more troubleshooting information.
AC
IN
LED
RUN/STANDBY
SWITCH
CAPTIVE
SCREW
DC
OUT
LED
FAULT
LED