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350-20054 / 350-20055
22
EN
4. MAINTENANCE
Dirt may prevent the presence detector from functioning properly. Therefore, always keep the lens clean and dry. Use a
damp cloth and water with some detergent to clean the lens. Never exert pressure to wipe the lens clean. The presence
detector should be replaced if the lens or other parts of the presence detector are defective.
5. TROUBLESHOOTING
Problem Cause Solution
The lighting/ventilator does not
switch on.
Internal error. Switch the mains power off for at
least five seconds and then switch it
back on.
Defective lamp/ventilator. Test whether the lamp/ventilator itself
is still working.
Incorrect wiring. Check the wiring against the wiring
diagram.
There is no power supply voltage on
the sensor.
Check whether there is power supply
voltage on the sensor.
Incorrectly set lux value. Ensure the lux value is set to the
desired light intensity.
The lighting/ventilator does not
switch off.
Switch-off delay set too long. Ensure the switch-off delay is not set
too long (using the TIME key).
The presence detector is still detecting
movement.
Leave the detection zone to prevent to
presence detector from re-activating.
Power supply voltage fluctuations. Ensure the power supply voltage is
constant.
The presence detector is subject to
temperature fluctuations.
Ensure the presence detector is not
pointed towards an object that may
cause temperature fluctuations,
such as air conditioning or a heating
installation.
After setting the lux value, the
presence detector remains
permanently on, regardless of the
setting.
Internal error. Switch the mains power off for at
least five seconds and then switch it
back on.
22


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