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Troubleshooting
By purchasing the laboratory power unit unit, you have acquired a product that is reliable and opera-
tionally safe.
Nevertheless, problems or faults may occur.
For this reason we want to describe how to troubleshoot potential malfunctions:
Always adhere to the safety instructions!
Error Possible cause
The power unit cannot Does the operating display light up on the power unit (2)?
be switched on. Check the mains voltage (you may also want to check the mains
fuse in the device or the line circuit breaker).
Connected consumer devices Is the voltage set correctly?
do not work. Is the polarity correct?
Check the technical data of the consumers.
The “OT” indicator is lit The power unit is overloaded and overheated.
Leave the device on and cool down without load.
The “CC“ indicator 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 “CV” indicator is lit Constant voltage operation
The power unit works normally. The output provides the constant
voltage set.
Regularly check the technical safety of the device e.g. for damaged housing etc.
Any other repair work must always be carried out by a specialist familiar with the
hazards involved and with the relevant regulations. Unauthorized modifications
or repairs to the device invalidate the warranty/guarantee. Fuses are replace-
ment parts and not covered by the warranty/guarantee!
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