PSU
APW3-12-1600 Series
May 14, 2015 Version 1.1
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Trouble Shooting & FAQ
#
Issue
Reason
Troubleshooting
1
Fan won’t run, and no
12V output
AC Input is abnormal
1. Make sure the AC input wire has a good
connection and the plugs are
connected firmly
2. Make sure the mains power is working
well and its voltage is above 205V.
2
The fan is running, but
there is no 12V output.
1. Voltage
in
your
power
system
is
lower than required
2. PSU is in protection
mode
1.
Please check whether the voltage is
above 205V with multimeter to make
sure the PSU can switch on correctly.
2. Check whether there is a short circuit
output or overload that is causing the
PSU to enter a locked status. After
removing the problem, the PSU should
power up.
3
After a few minutes,
the PSU stops working,
starts working, stops
working
and
keeps
cycling.
PSU is in over-heat
protection
1
．
Check whether the fan is working
2
．
Check whether the fan’s vent is being
blocked
3
．
Check whether there is a dust buildup
inside the PSU due to prolonged use.
Do NOT remove the PSU’s cover unless
trained to do so.
4
．
Check the power and ambient
temperatures follows the
Load/Temperature graph
4
Output is normal, but
the fan is not working.
Fan is broken
1. Check that the fan is clear of blockages
or buildup
2. Fan is broken and needs to be replaced.
5
The PSU suddenly has
no output and can’t be
started again.
The
PSU
is
in
over-current protection.
Check whether the load current has
exceeded
the
built-in
overcurrent
protection
limit.
The
protection
automatically triggers when the load
current exceeds the limit to protect against
damage to the PSU and the
server
.