4
Table 3 Description of LEDs on the PSR650-A and PSR650-D
Color/status Meaning
Possible
causes
Green
The power
module is
operational.
—
Red
The power
module is
faulty.
Power alarm (input
under-voltage, output short
circuit, output over-current,
output over-voltage, or overheat
occurred to the power module,
and the power module took a
self-protection action).
The power module fan is faulty.
OFF
The power
input is
faulty.
The power switch is off.
The power cable is connected
incorrectly.
CAUTION:
•
In case of a power alarm (the OUTPUT LED turns red),
check whether output short circuit, output over-current,
output over-voltage, or overheat occurred to the power
module. In the case of output short circuit, or abnormal
temperature, the power module will resume normal
operation automatically when the fault is cleared. However,
if the power alarm is caused by output over-voltage, the
power module will get locked up and will not resume
operation automatically. In this case, turn off the power
switch, disconnect the power cables, and then reconnect
the power cable and turn on the power switch.
•
Do not turn on and off the power switch too frequently. After
turning off the power switch, wait at least 30 seconds before
turning it on again.