Nilfisk-ALTO ATTIX 751-01/-11/-21 Repair Manual page 20

Nilfisk
ALTO
Attix7_ver.1.0_140105
Operation
Level control:
Level control by means of a pressure sensor is imple-
mented to optimize working with the equipment. The le-
vel in the container is metered in a rubber baffle pi-
pe.The pressure sensor measures the difference in pres-
sure between the container and the baffle pipe. Rising
water level increases the pressure in the pipe. The pres-
sure in the baffle pipe increases linearly with water level.
Man mode:
The electronic circuitry cuts out the turbine upwards of
a defined pressure (water level), and remains in this
status until the cleaner is turned off and the container
emptied. The pump cannot be started in manual
mode. The power of the turbine can be altered by
speed control.
Auto mode:
Only the suction turbine runs when there is no water in
the container. When the container fills with water, the
pump is turned on. If more water flows into the container
than the pump can convey out of the container, the level
continues to rise. To prevent overfilling, the suction tur-
bine is cut out at maximum level. As soon as the water le-
vel is significantly reduced by the pump, the suction mo-
tor is cut in again. Upon total emptying of the container,
the pump is cut out with a time delay.
Pump mode:
The Pump switch setting is a momentary contact (auto-
matic reset). One-time actuation causes the pump to
work for 30 s. This function can be used to completely
empty the container. At the same time this is a safeguard
against the pump running when it is dry.
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