27
All MT-3405F™ II consoles, flowmeters and servo valves are
tested prior to packaging, so unless there has been damage
in shipment you can be confident that everything will be
operational when you receive it.
However, if you do encounter a problem that appears to be
related to equipment failure,
PLEASE DO NOT OPEN THE
CONSOLE
. Your system is protected by a warranty, and
Micro-Trak will gladly correct any defect.
Many problems are the result of mistakes in installation
or operation. Before returning any parts for service,
carefully check your installation and review the operating
instructions. For easy-to-follow guidelines, refer to the
troubleshooting section which follows.
CONSOLE APPEARS DEAD
Using your test light, check for 12 volts at the power source.
Also check for damaged power cable or reversed terminals.
(Console requires 12 volts for proper operation). Check
connections of ignition or power switch.
SPEED IS ALWAYS ZERO OR ERRATIC
Check for properly calibrated wheel circumference.
Review speed sensor installation. Check for proper
mounting, alignment and spacing of speed sensor in
relationship to magnet assembly. Make sure magnet
polarities are alternated. Also check cable for breaks or
incomplete connection.
For more suggestions on solutions
to speed problems, see Hall-effect sensors and console
inputs on pages 35-36.
DISTANCE COUNT IS INACCURATE
Wheel circumference was incorrectly measured or entered.
Review calibration, re-adjust and test.
AREA COUNT IS INACCURATE
Implement width or wheel circumference was measured
incorrectly or programmed incorrectly. Go back through
the original procedures, make changes, and test for acre
(hectare) count again. (Make sure no width is entered for
unused booms.) Verify accuracy with formula:
Acres = Distance x Width in feet/43560
Hectares = Distance x Width in meters/10,000
NO READOUT OF GALLONS (LITERS), OR GALLONS
(LITERS) PER MINUTE
Check to see that the sprayer pump and equipment are
operating properly. If liquid is moving through the line,
check the flow sensor to be sure it is screwed all the way
into the flowmeter.
Check to see that a FLOW CAL number has been entered.
Also check cable for breaks or incomplete connection.
If the flowmeter is new or has not been used for a long
period of time, the turbine may be sticky. Flushing the
system out with water should make the turbine spin freely.
Flow rate may be too low to register a reading, or foreign
material may be lodged in the flowmeter.
BOOMS SHUT-OFF
If you are in AUTO with no speed, the booms will shut-off.
TOTAL LIQUID USED IS INACCURATE
This may result from an incorrectly-entered “FLOW CAL”
value. Check the number stamped on the flowmeter tag,
and be sure this is entered in the console’s “FLOW CAL”
position. If the meter has been used for some time, wear
may have changed the Flow Cal value.
See Fine-Tuning
Flowmeter Calibration in Appendix C.
Check the mounting position of the flowmeter. With lower
flow rates, the meter should be mounted vertically. Also
check to see that the flow sensor is screwed all the way into
the flowmeter.
Other causes may be inaccurate sprayer tank markings, a
flow rate too low to register, or foreign material lodged in
the flowmeter.
CONSOLE IS ERRATIC IN OPERATION
If you have a two-way radio, it may be mounted too close
to the console. Keep all MT-3405F™ II cables away from the
radio, its antenna and power cable.
Ignition wires may be causing the console to malfunction.
Keep MT-3405F™ II cables away from ignition wires, or
install ignition suppressor.
Reroute all cable away from electric solenoids, air
conditioning clutches and similar equipment.
Check the VALVE SPEED calibration number in Special
Calibration. If the RATE tends to overshoot or oscillate, the
VALVE SPEED setting may be too high for the control valve
being used; reduce the VALVE SPEED setting by 1 (range is
-2 to +3).
DISPLAYED MEASUREMENTS DO NOT MAKE SENSE
The console may be in the incorrect measurement mode
(English or metric).
See page 24 for instructions.
DISPLAY READS “OFL” OR “99999”
DISTANCE, AREA, and VOLUME counters read OFL or 99999
when they have exceeded their maximum count. Reset to
zero to resume counting.
SYSTEM OPERATION (CONTROL) IS SLUGGISH IN
AUTOMATIC MODE
Check the VALVE SPEED setting in Special Calibration. If
using a slow valve (4 seconds or more, open to close)
increase the VALVE SPEED setting.
Troubleshooting
(cont)
General
