Swift Group Select 122 2020, Руководство пользователя

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WATER LE VEL SENSOR & CLE ANING
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Water level sensor & cleaning
Principle
The sensor, fitted to Swift Group motorhomes
are pre-fitted to water tanks, and link to the
control unit, via a pre-fitted wiring harness. The
sensors, which consist of a number of stainless
steel rods or probes, at different lengths, are
immersed in the fresh or waste water, and use
the conductivity of water, between the probes,
to provide a reading to the control unit.
The sensors are ‘digital’, in that while the
conductivity (resistance) value can vary, the
fusebox will register any conductivity between
the reference probe and the various different
length probes, indicating water present.
Normally, even if the rods are dirty, and
providing the rods have not bridged by a foreign
object, a circuit will still be delivered back to the
control unit and a water level displayed.
Sensor cleaning
The first step, in case of fault diagnosis, is
to clean the sensor rods. False water level
readings at the control unit can be caused by
calcium build-up or foreign objects within the
tank bridging the probes. (Especially with waste
tanks).
To clean sensor:
WARNING: Only use food safe plastic
mesh scourers, which are suitable for
domestic use, for cleaning the sensor studs.
1. Remove the sensor from the tank
2. Check the probes for build up of
contamination
3. Use clean soapy water
4. Place scourer in water to dampen
5. Apply scourer to the sensor probes
withlimited pressure
6. Rub sensor probes removing contamination
7. Swill sensor probes with fresh clean water
8. Replace sensor into tank.
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