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In the event of extended transportation in the cold and a subsequent change to
warm rooms, do not switch on immediately; wait for the temperature to equalise.
If water has penetrated the device, switch it o and inform the Service
Department.
Do not expose the device to heat sources that will heat it up more than normal
use.
In the event of a thunderstorm, disconnect the device from the mains.
Overvoltage can damage the device.