User manual

68
16. TROUBLESHOOTING
By purchasing the laboratory power unit, you have acquired a product that is reliable and operationally
safe.
Nevertheless, problems or errors may occur.
For this reason we want to describe how to troubleshoot potential malfunctions:
Always follow the safety instructions!
Error Possible cause
The power unit cannot be
switched on.
• Does the indicator C.V. or C.C. light up?
• Check the mains voltage (you may also want to check the
mains fuse in the device or the line circuit breaker).
Connected consumer devices do
not work.
• Is the voltage set correctly?
• Is the polarity correct?
• Check the technical data of the consumers.
The control indicator REAR
CONTROL is lit. The device can
not be operated via the rotary
controls.
Remote control operation is active. Put the rear MODE slider
into the Normal position.
The “O P OFF” display is lit. The DC output was switched off through the remote control
terminal Remote Control (10) or software.
The output current is limited to
5 A, although the current settings
are higher.
The output current is limited to 5 A. For higher currents,
connect the consumer to the rear main output.
The control indicator C.C. is lit. Constant current operation:
The preset current was exceeded. Check power consumption
on your consumer and increase the current limitation on your
power unit, if applicable.
The control indicator C.V. LED
is lit.
Constant voltage operation:
The power unit works normally. The output provides the
constant voltage set.
Display “OVP” Over-voltage protection:
See chapter PROTECTIVE MEASURES.
Display “OtP” Overheating protection:
See chapter PROTECTIVE MEASURES.