TPUH-PSU12-UL: Integrated Switching Power Supply
PTN Electronics 17 www.PTN-electronics.de
7. Troubleshooting & Maintenance
Problems
Potential Causes
Solutions
No output voltage
Power supply protect
function will start when over
loaded.
Please reduce loads.
After selecting output
voltage, the output channel
will switch off automatically.
Switch on the output
channel via front panel
button.
Fail or loose connection
Make sure the connection
is good.
AC1
or
AC2
indicator
doesn’t work or no
respond to any
operation
Fail connection of power
cord.
Make sure the power cord
connection is good.
Cannot control the
device by control device
(e.g. a PC) through
RS232 port
Wrong RS232
communication parameters
Type in correct RS232
communication
parameters.
Fail or loose connection
Make sure the connection
is good.
Broken RS232 port
Send it to authorized
dealer for checking.
Cannot control the
device by front panel
buttons while can
control it through
RS232 port
The front panel buttons are
broken
Send it to authorized
dealer for repairing.