KIROVETS K-744R1, K-744R2, K-744R3, K-744R4 tractors
52
Code
Fault description, possible
cause
Fault check method
22
Position sensor
failed
Sensor wire is broken, the
sensor is not connected or
not adjusted.
1. The position sensor is not adjusted. Disconnect the
harness connector from the sensor. Screw the sensor out.
Lift the linkage to the uppermost position using remote
buttons or solenoi
d button “Lifting”. Screw the sensor all
the way in by hand and then screw it out for two turns.
Connect the harness connector to the sensor.
Using the control panel, lower the linkage and lift it to the
uppermost position.
Lifting indicator shall go out. If it illuminates, screw the
position sensor further in by 1/6 of a turn. Recheck sys-
tem’s operation. If needed (the lifting indicator doesn’t go
out in the upper position of the linkage), turn the sensor
further in again and repeat the check. When the linkage is
adjusted correctly, then it shall be lifted and lowered in its
utmost positions from the control panel. When the linkage
after the lifting comes to its uppermost position, the lifting
indicator shall go out.
2. Position sensor failed.
Dismantle the position sensor from the tractor to check
how it operates. According to wiring diagram for the link-
age control system, which is attached to the manual, 5V
shall be supplied to terminal 3, to terminal 1 of the “frame”
(negative), to sensor pins; then press with your finger the
moving sensor stem and, using a multi-meter, measure
the sensor output voltage between terminals 2 (signal)
and 1 (negative). When the stem (core) is moved to its full
length, the sensor output voltage shall change within 10%
to 90% of the supply voltage to sensor 3. Fault (break) of
harness in the sensor circuit.
Check the harness by the diagram (fig. 5)
23
Control panel failed. Failure
of
potentiometer 2
(fig. 2) of
soil cultivation depth: see
voltage as per wiring diagram
(fig. 5)
Check connection reliability of control panel and electronic
unit connectors; check EHR harness for mechanical dam-
age.