TeeJet 844 Sprayer Control - Manual (Page 39)

37
CONDITION POSSIBLE CAUSES SOLUTION
6 Actual total volume applied in GPA, A Speed sensor not calibrated correctly. Recalibrate the magnetic or radar speed pulses in
G/1000 ft 2 , or l/Ha does not match the the Calibrate Speed section of the System Setup
total area covered. Mode on page 22-23 of the 844 Installation
Manual.
B Incorrect nozzle spacing Check the Nozzle Spacing section in the System
Setup Mode on page 19 of the 844 Installation
Manual to ensure the correct nozzle spacing
has been entered. This number should reflect
the distance between nozzles in inches (cm)
on the boom.
If banding, enter the band width as your spacing.
If directed spraying enter the row spacing divided
by the number of nozzles per row.
C Incorrect capacity nozzles The Nozzle Selection section in the Application
Setup Mode on page 26 of the 844 Installation
Manual does not match closely enough to the tips
on the boom. Compare the value in this section
with the flow rate of the nozzles being used at
40 psi (2 bar).
D Flow meter pulses incorrect In the System Setup mode, move to the Flow
meter Pulses section on page 18 of the 844
Installation manual. Enter the factory calibrated
flow meter pulse rate located on the tag
accompanying the flow meter.
E Wheel speed magnets installed incorrectly One or more of the wheel sensor magnets are not
consistently sending a pulse to the monitor.
The distance between the sensor and the magnets
is incorrect. Ground debris can accidentally move
the sensor out of position. The red LED on the
back side of the sensor should be lit when placed
within the correct distance form the magnets.
F Radar installed incorrectly Precise installation of the Radar is critical to it
working correctly. Thoroughly review the manual
provided with the Radar sensor you are using.
6 No regulation in Auto Mode A No speed sensing Check speed sensor to ensure it is sending pulses
to the controller. Check the Calibrate Speed
section in the System Setup Mode on pages 22-23
of the 844 Installation Manual to ensure speed
sensors are correctly calibrated.
B Regulating valve malfunction Check wiring from controller to the regulating
valve. Make sure there is voltage to the
regulating valve.
Both wires leading to the regulating valve are
12V(+). With the Master Switch on, when either
the or key is pushed, the appropriate
wire goes to ground (–) to complete the circuit.