TP-Link PSM150-AC - Page 3

1.2 Description of LEDs
There are three LEDs on the front panel of PSM150-AC.
Described below:
LED Status
Description
Power On
Power supply module is powered on and running well, but not
supplying power to the switch.
PS OK Off
Fault Off
Power On
PS OK On
Power supply module is powered on and running well, and
supplying power to the switch.
Fault Off
Power On
Fault On
The circuit has faults, such as output over-
voltage, output
under-voltage, output over-current
, output short circuit,
hot-swap control failure (note 1) or fan fault.
PS OK Off
Power Off
PS OK Off
Fault Off
AC power off or power supply fault.
Table 1-1 LED Status

Note:
• Hot-swap control function will be checked when
PSM150-AC is powered on but has not been inserted into
the switch. If the Fault LED is on under this condition,
please do not insert PSM150-AC into the switch,
otherwise the power supply module or the powered
devices may be damaged.
• The failure of output over-voltage or over-current may
cause the power LED to flash.
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