43
844E Sprayer Crontrol
98-70006 R3
CONDITION POSSIBLE CAUSE SOLUTION
2 Application Rate Units continually
fl ash 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 fl ow
MECHANICAL
B Stalled fl ow meter
Make sure there is no pressure in the
system. Remove the fl ow meter from
the discharge line. Inspect the inside of
the meter for obstructions. The turbine
should move freely. If it does not rotate
easily, try fl ushing it out with clean water.
If it remains stuck, remove the turbine
by releasing the retaining clip. Clean the
turbine carefully and make sure it rotates.
Replace the turbine into the fl ow meter
body and secure with the retaining clip.
If you have a rapid check fl ow meter,
remove the turbine from the fl ow meter
body by unthreading it at the sensor.
Check the turbine for obstructions.
Flush with clean water or disassemble if
necessary.
C Plugged tips
In the event of plugged nozzles, remove
from boom and clean with water and a
TeeJet brush. Take care not to damage
the orifi ce.
D Wrong capacity tips
All tips on the boom should be of the
same style, spray angle and capacity
(Flow Rate). Replace any tips not
matching those initially selected.
E Flow meter plumbed incorrectly
A fl ow directional arrow is located on the
body of the fl ow meter. Plumb the fl ow
meter with the arrow in the direction of
the fl ow.
The fl ow meter must be mounted 10˝ to
12˝ (25-35 cm) from other pipe fi ttings.
See 844 Installation Manual page 11.
Generally, the fl ow meter works better
when mounted in a vertical position with
the fl ow being directed up.
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