T2 VIA-DU-20 Mode D'emploi page 11

5.4. Servicing
Neither control device nor any of the sensors require any servicing.
The surface of the ground sensor needs to be cleaned regularly, to ensure that it gives
correct moisture measurements. A flannel and tap water may be used. The surface of the
sensor must not be scratched with sharp objects. It is recommended that you check that
the device is working before the onset of winter.
6. Installation instructions
Only for electricians!
Attention: mistakes made when connecting up the device can cause damage to the control
unit. The company is not liable for any damage caused by faulty connections and/or
incorrect handling.
– Before working on the device, switch off the power supply.
– The device may only be connected up and serviced by authorised, trained personnel.
– The device is only designed to be connected to fixed cables.
– When installing the device, make sure that high-voltage cables, such as the mains supply
and extensions do not come into contact with low-voltage cables such as sensor cables.
– Moreover, you must ensure adequate protection against all the extension leads discon-
necting in compliance with the requirements of EN 60730, part I. This can be achieved for
example by fixing the cables with cable clips.
– Local standards for electrical connection must be observed.
– If the device does not work, please first check all connections and the mains power
supply.
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