9.4 The Diameter is Not Displayed
− No pulses come from the diameter sensor, i.e. the mechanical
transmission to the sensor is broken (the shaft coupling has come
loose).
− Faulty diameter sensor.
− Break or loose connection in the sensor cable.
− The pulse range has changed (diameter pulse range must be
calibrated).
9.5 Displayed Diameter is Not Correct
− If there has come error messages at the bottom of the display
concerning the diameter sensor (several times), the sensor is
obviously defective.
− The mechanical transmission of the sensor is maybe slipping.
− The fixture of the sensor has maybe come loose.
− Check the "Sensors" in the "Test/calibration" display; are
length/diameter pulses received.
9.6 Prevented Oversawing Does Not Work
Saw does not return to the casing after the tree is cut, but continues to
move until it is in the end position.
− Check the saw max pulses setting (3); is the value reasonable.
− Check the saw movement sensors and the wiring.
9.7 Check of the Diameter and Length Sensors
The function of the diameter and length sensors can be checked as
follows:
1. Select the "Test/calibration" key and press Enter.
2. Select the "Sensors" and press Enter.
3. In the window is displayed the raw readings of the diameter
and the length sensors. Also, in the display shows the state of
the saw limit (is saw in the casing or not) and the raw reading
of the saw movement sensor.
9.8 Sensor Voltage Control
The sensor voltage control can be taken in use by connecting a 1,2
kOhm / 0,6 W resistor to the head module (look at head module
connection diagram). The resistor must be connected between the
connector numbers 1 and 22. When the sensor voltage control is in use,
the measuring equipment gives an error message, if one of the sensor
voltages falls below 11 V.
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