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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
The power unit cannot
be switched on.
Connected consumer devices
do not work.
The "OT" indicator is lit
The "CC" indicator is lit.
The "CV" indicator is lit
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!
Possible cause
Does the operating display light up on the power unit (2)?
Check the mains voltage (you may also want to check the mains
fuse in the device or the line circuit breaker).
Is the voltage set correctly?
Is the polarity correct?
Check the technical data of the consumers.
The power unit is overloaded and overheated.
Leave the device on and cool down without load.
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.
Constant voltage operation
The power unit works normally. The output provides the constant
voltage set.
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