P l e a s e G i v e P a r t N o . , D e s c r i p t i o n a n d U n i t S e r i a l N o .
HIGHWAY EQUIPMENT COMPANY
35
89008-A
Page Rev. A
TROUBLESHOOTING
Power switch is turned ON,
display is blank
1.
Check fuse.
2.
Check battery connections.
3.
Check cable connections at interface box and console.
4.
Check vehicle battery.
Display is difficult to read
1.
Adjust backlight brightness.
2.
Temperature below -4
°
F, allow unit to warm.
3.
Temperature above 140
°
F, cool console.
Conveyor starts to run when PTO
is engaged
1.
Mark V power must be on to control Mark series valve.
2.
Check cable connections.
3.
Faulty interface box. Contact dealer.
4.
Make sure hydraulic pump flow is not too high.
5.
Faulty radar. Check for ground speed on main screen.
Conveyor does not run when PTO
is engaged
1.
No active job.
2.
Check cable connections.
3.
Check job setting application rate and width.
4.
No ground speed. Check for speed on main screen.
No spinner RPM
1.
PTO not engaged.
2.
No active job when spreader equipped with PWM spinner valve.
3.
Check spinner sensor cable connections.
4.
Check spinner sensor clearance to bolt head of fins. Clearance
must be 1/8” or less.
5.
Check spinner pulses/rev setting equals number of fins on disk.
6.
Faulty sensor. Contact dealer.
Spinner speed will not adjust from
main screen
1.
Requires optional PWM spinner valve.
2.
No active job.
3.
Check that “Spinner valve type” setting is not “Manual.” Change
to “Brand 55 gpm” for L3020 or “Brand 30 gpm” for L2020.
Turn the Mark V off and back on after changing setting.
4.
Check cable connections.
Application rate per acre is
incorrect
1.
Check that actual feedgate opening matches active job setting.
2.
Check that actual spread width and driving centers match active
job setting.
3.
Check that actual density of product matches active job setting.
4.
Check radar calibration and verify ground speed reading on main
screen.
5.
If operating in “Manual” verify vehicle ground speed.
6.
Verify rate on main screen is correct.
7.
Adjust “Calibrated CFR” setting.
Alarm flashes on main screen -
MAXIMUM CONVEYOR RPM,
SLOW DOWN
Conveyor RPM has reached the maximum conveyor rpm setting. The
default setting is 50 rpm.
1.
Slow down – driving too fast.
2.
Check that active job feedgate setting is large enough for rate,
spread width, and speed.
3.
Ground speed on main screen is too high. Calibrate radar.
Summary of Contents for New Leader MARK V DGPS-Ready
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