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Make sure that you contact the SENSE cables as close as possible to the connecting point of the con-
sumer. Observe correct polarity.
Never short-circuit the “SENSE” cables.
10. Protective device
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 disconnected 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:
1
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.
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
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 ventilation apertures are blocked. During
the startup self-test stage, the fan must start up audibly. Where this is not the
case, please contact our customer service.
To prevent overheating, the output is switched off.
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 output.
Switch on the power unit again and check its function. If the error message re-
mains on, please contact our customer service.
