6.5 Function of the blower fan pressure sensor and the hydraulic
pressures switch
The blower fan pressure sensor (Fig.: 15)
prevents the meter roll from being switched on
until a hydraulic blower is switched on, thus
preventing clogging of the seed drill through
being switched on unintentionally or
prematurely.
The hydraulic pressure switch (Fig.: 16) signals
on the control box if too much pressure (10
bar) is being applied in the tank line of the
hydraulic motor. This can destroy the seal.
As soon as one of the two sensors report an error, the
message "Blower fan error" appears on the screen of the
control box.
If the blower fan is not running yet, start it up and then the
error message should disappear and you can start the
meter roll.
If the blower fan is already running, there is probably too
much pressure in the tank line of the motor. This could be
caused by a clogged oil filter or a tank line to the coupling
that is too small.
CAUTION: It is essential to reduce the pressure, as otherwise the motor could be
destroyed!
Fig.: 16
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