TeeJet 844 Sprayer Control - Manual (Page 38)

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CONDITION POSSIBLE CAUSES SOLUTION
E Flow meter plumbed incorrectly A flow directional arrow is located on the body of
the flow meter. Plumb the flow meter with the
arrow in the direction of the flow.
The flow meter must be mounted 10˝ to 12˝ (25-35
cm) from other pipe fittings. See 844 Installation
Manual page 6.
Generally, the flow meter works better when
mounted in a vertical position with the flow being
directed up.
F Pump Capacity too low Check the pump to make sure it is working
correctly. Check the plumbing system for any
obstructions. Reduce Agitation Volume.
3 Flow meter turbine symbol A Stalled Flow meter Make sure there is no pressure in the system.
continually flashes on/off.
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.
Check to ensure that the sprayer pump has been
engaged while trying to spray.
Check cabling for any loose connections.
4 Rate Oscillation A Extreme low regulated flow Due to very low application rates (GPA, G/1000 ft 2 ),
l/Ha) the regulating valve in throttling mode is
operating in an almost closed position.
Adjust the Reg. Valve Speed Number in the
System Setup Mode (page 21) to a slower value.
Plumb the regulating valve in bypass mode. This
should allow the regulating valve to operate more
in the center of its rotation. If you change from
throttling mode to bypass mode, you must
reprogram the Pressure Regulating Mode in the
System Setup mode. Refer to page 20 of the 844
Installation Manual.
5 Sprayer stops spraying while in Auto Mode. A Pressure Regulating Mode is Check the Pressure Regulating Mode in the
programmed incorrectly. System Setup mode of the 844. Refer to page 20
of the 844 Installation manual to insure that the
controller has been correctly programmed for the
regulating valve position on your sprayer.
B Flow meter stalled A flashing symbol will also indicate if the flow
meter has stalled. Inspect flow meter for
obstructions. If flow meter turbine is impaired,
clean and replace.
Sometimes when the regulating valve closes too
far, maybe even complete shut-off (with ball type
regulating valves), this can cause the flow meter to
stall and no flow or pressure regulation will occur.
Depress the Auto/Manual key so that the LED
indicates “MAN” mode, depress the key for
approximately three seconds. You should see the
tips begin to spray. Depress the Auto/Manual key
so that the LED indicates “Auto” mode, and
continue to spray.