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7. Troubleshooting & Maintenance
Problems
No output voltage
AC1 or AC2 indicator
doesn't work or no
respond
to
operation
Cannot control the
device
by
control
device (e.g. a PC)
through RS232 port
Cannot control the
device by front panel
buttons
while
control
it
through
RS232 port
Cannot control the
device
via
Web-
based GUI
Causes
Power supply protect function
will start when over loaded.
After selecting output voltage,
the output channel will switch
off automatically.
Fail or loose connection
Fail connection of power cord.
any
Wrong RS232 communication
parameters
Fail or loose connection
Broken RS232 port
The front panel buttons are
can
broken
The IP address of control PC
and TCP/IP port are not on the
same network segment
The port No. are wrong.
Fail or loose connection
Broken TCP/IP port
Solutions
Please reduce loads.
Switch
on
the
channel via front panel
button.
Make sure the connection
is good.
Make sure the power cord
connection is good.
Type in correct RS232
communication
parameters.
Make sure the connection
is good.
Send
it
to
authorized
dealer for checking.
Send
it
to
authorized
dealer for repairing.
Modify
control
network segment to the
same with the TCP/IP port.
The correct port No. is
4001.
Make sure the connection
is good.
Send
it
to
authorized
dealer for checking.
output
PC's
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