5
Table 4
Description of the LEDs
LED Color
Status
Off
No power is input or an input
failure occurs.
AC OK
On
The power input is normal.
Off
No power is output or an output
failure occurs.
DC OK
On
The power output is normal.
In normal cases, the input LED of the PSR750-A power supply turns on
while the output LED is still off after you connect the power cord but
leave the power supply in the off state; the input and output LEDs both
turn on after you power on and switch on the power supply.
However, if the input LED is on but the output LED is off, this case may be
caused by output short-circuit, output over-current, output over-voltage,
or over-temperature. To solve such cases, take the following actions:
1.
Switch off the power supply and disconnect the power cord, and
then reconnect the power cord and switch on the power supply to
check whether the power supply can work properly.
2.
If the above action does not work, the case may be caused by
over-temperature. Take actions to cool down the power supply,
and then it can work properly.
