166
/
167
rotating in the fields
Driver sensitivity properly to observe if the
phenomenon disappears.
FA7
The transfer
row is
incorrect
When the vehicle is in
auto driving mode,
the transfer row
cannot reach the
specified width
Make sure that the correct width is set for the farm tool,
see the steps in section 5.3.4;
Make sure that the correct deviation is set for the farm
tool; see the steps in section 5.3.5.
FA8
The guide
wheel holds
at the limit
position
When the vehicle is
switched to auto
driving mode, the
guide wheel directly
turns and holds at the
limit position in the
left or right
Set a Line AB. Place the vehicle parallel with the Line
AB at the left side. Observe that the lateral deviation is
in the left. Now switch the vehicle to the auto driving
mode. Observe the direction that the guide wheel turns
and holds. Place the vehicle at the right side of Line AB
and switch it to the auto driving mode. If the guide
wheel turns and holds at the limit position in the left
when it is at the left side of Line AB, while the guide
wheel turns and holds at the limit position in the right
when it is at the right side of AB, it means the hydraulic
valve drive terminals are connected oppositely during
connection. Just exchange the connection again and the
trouble will disappear.
If the guide wheel always turns and holds at the limit
position in one direction no matter which side the
vehicle is in, go to the technical support screen.
Manually turn the guide wheel to the left and right limit
repeatedly to observe if the angle information of guide
wheel changes in a continuous way or in a normal
range. If the angle is incorrect, it means that there’s
trouble at the steering system. Eliminate the trouble
according to the methods described for FA4.
If the guide wheel angle is normal, the sticking of
hydraulic valve may be suspected. Continuously press
the buttons by manual at both ends of the proportional
valve in order to eliminate the sticking. If the trouble
persists, dismantle the proportional valve on the
hydraulic valve and modules LRDC and LPDC for
cleaning, or even to replace the hydraulic valve.
If both the steering system and the hydraulic valve are
OK, go to the technical support screen and perform
square wave excitation test in step 3 of calibration, i.e.
Steering sensitivity calibration. If it is unable to
complete the test, the damage of drive circuit of the
