Protective Devices
The power unit has several integrated automatic protective devices that protect the power unit from
damage. The activated protective devices are displayed with letter codes and the DC output is switched
off for safety reasons at the same time.
When a protective devices is active, the consumer must be switched off and dis-
connected from the power unit immediately.
To reactivate the output, switch off the power unit. Wait until all displays have gone out. Switch on the
power unit again. The power unit should work normally again. Where this is not the case, please contact
our customer service.
The following displays are possible:
Over-Voltage Protection
A higher external voltage than provided by the power unit was determined at the DC
output. The output is switched off.
The current levels for switching off are listed in the technical data.
Over-Heating Protection
The integrated temperature sensor determined that the system temperature is too
high. To prevent overheating, the output is switched off.
Turn off the power unit and let it cool down for at least 30 minutes. After switching it
on, check if the fan or venitlation apertures are blocked. During the start-up self-test
stage, the fan must start up audibly. Where this is not the case, please contact our
customer service.
Overload Protection
In case of overload at the DC output, the power limitation is usually switched on. If
this is not the case, the second protective function becomes active.
Switch off the power unit at once when this warning message appears and check the
connection data of the consumer. Remove the consumer from the power unit's DC out-
put.
Switch on the power unit again and check its function. If the error message remains
on, please contact our customer service.
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