TeeJet 844-R Speed Compensated Application Control - Manual (Page 27)

98-05047 27
R0
Troubleshooting Guide
CONDITION POSSIBLE
CAUSES SOLUTION
1. Application Rate Units (GPA)
continually flash on/off.
A. Continuous discrepancy of 10% or
more between Target Application
Rate and Actual Application Rate.
Check all components and
programming steps related to flow.
PROGRAMMING
B. Flow meter pulses In the System Setup Mode, move to
the Flow Meter Pulses section on
page 16. Enter the factory calibrated
flow meter pulse rate located on the
tag accompanying the flow meter.
C. Nozzle Setup In the Application Setup Mode, move
to the Flow Rate Selection section on
page 25. Enter the flow rate in GPM at
12 psi of the tips.
If the tips have been used and
possibly worn, measure the flow in
Gallons Per Minute at 12 psi and enter
that value in the step above.
D. Number of spray tips In the System Setup Mode, move to
the # of Tips step on page 16. You
must enter the correct number of
spray tips or micro tubes.
2. Application Rate Units continually
flash on/off.
A. Continuous discrepancy of 10% or
more between Target Application
Rate and Actual Application Rate
Check all components and
programming steps related to flow.
MECHANICAL
b. Plugged Tubes In the event of plugged tubes, remove
and clean with water and compressed
air.
C. Wrong capacity tubes All tubes should be of the same
capacity (Flow Rate).
D. Flow meter plumbed incorrectly A flow directional arrow is located on
the body of the flow meter. Plumb the
arrow in the direction of the flow.
The flow meter must be mounted 10’
to 12’ from other pipe fittings.
Generally, the flow meter works better
when mounted in a vertical position
with the flow being directed up.
3. Flow meter turbine signal
continually flashes on/off.
A. No flow meter pulses Check to ensure that the delivery
pump has been engaged while trying
to spray.
Check cabling for any loose
connections.
4. Actual total volume applied, in GPA,
does not match the total area
covered
A. Speed sensor not calibrated
correctly
Recalibrate the magnetic or radar
speed pulses in the Speed Sensor
Calibration section on page 17.
B. Incorrect nozzle spacing Check the Tip Spacing section in the
System Setup Mode on page 16 to
ensure the correct nozzle spacing has
been entered. This number should
reflect the distance between nozzles,
in inches.
Continued on next page