TeeJet 844 Sprayer Control - Manual (Page 37)

CONDITION POSSIBLE CAUSES SOLUTION
1 Application Rate Units (GPA, G/1000 ft 2 A Continuous discrepancy of 10% or more Check all components and programming
or l/Ha) continually flash on/off. between Target Application Rate and steps related to flow
Actual Application Rate.
PROGRAMMING
B
Flow meter pulses 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.
C Nozzle Selection In the Application Setup mode, move to the Nozzle
Selection section on page 26 of the 844 Installation
Manual. Enter the correct color or the flow rate in
US GPM (l/min) {Imp. GPM} of the tips you are
using at 40 psi (2 bar). For new tips, this can be
found in your TeeJet
® Catalog.
If the tips have been used and possibly worn,
measure the flow in US Gallons Per Minute
(Liters Per Minute) {Imperial Gallons Per Minute)
at 40 psi (2 bar) and enter the value in the User
Programmable tip programming step which can be
found in the System Setup Mode on page 20 of
the 844 Installation Manual.
D Number of spray tips per boom section. In the System Setup mode, move to the Tips Per
Boom Section step on page 19 of the 844
Installation Manual. You must enter the correct
number of spray tips for each boom section on
your sprayer. Three or five boom sections are
possible. If you do not use all boom section
switches, make sure those not used are set to “0”.
2 Application Rate Units continually A Continuous discrepancy of 10% or more Check all components and programming steps
flash on/off. between Target Application Rate and related to flow.
Actual Application Rate.
MECHANICAL
B
Stalled flow meter. Make sure there is no pressure in the system.
Remove the flow 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 flushing 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 flow
meter body and secure with the retaining clip.
If you have a rapid check flow meter, remove the
turbine from the flow 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 orifice.
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.
35
Troubleshooting Guide