User manual

39
Maintenance and cleaning
the device, put it out of service. Remove the battery pack to safeguard the
device against unintentional operation.
Safe operation may no longer be possible if the device:
• shows signs of external damage,
• no longer functions,
• has been stored under unfavourable conditions or
• has been exposed to severe transport conditions.
If not used for any length of time (e.g. when in storage), remove
the batteries to avoid damages caused by leaking, etc.
10.2 Cleaning the rain sensor
Depending on the location, leaves, dirt particles transported by the wind,
sand, branches, etc., may get into the rain sensor’s collecting funnel (A).
Larger items may block the flow of rainwater. Sand can also accumulate
in the counter rocker: as the amount increases, this causes the meas-
urement results to be less accurate. Consequently, the rain sensor must
be cleaned from time to time; this must be done at least once a year,
however.
• Loosen the collecting funnel (A) of the rain sensor (B) by slightly
turning it clockwise and lift it o.
• Loosen the cover of the rain sensor by slightly turning it clock-
wise and slide it down.
• Detach the rain sensor from above, move it to the side with the
cable and remove the counter rocker.
• Clean the collecting funnel, contacts, counter rocker and drain
hole in the bottom of the housing to remove any residues.