Troubleshooting - Drive System
3A4637A Operation, Repair, Parts
55
Control Board Malfunction
Troubleshooting Procedure
(see following page for actual steps):
ti29062a
Remove control box cover. Turn
sprayer ON. Observe control board
Green and Red LED Lights.
No light
Once
Red light on
continously
Flashing
Normal Operation
Control board
commanding engine
to run
See error code
section, page 39 for
futher troubleshooting
Go to step 1.
Does switch
test positive?
NO
Replace the
switch.
Go to step 3.
Is 10-12
VDC
present?
YES
Go to step 4. Is
1-3 Ohms reading
present?
YES
Mechanical
problem. Repair or
place clutch/pinion
assembly.
NO
If low resistance is
present in step 4,
the problem is a
shorted coil.
Replace pinion. If
an open in the
wiring is present,
check pinion wiring
connections.
NO
YES
Go to step 2.
Do you have
proper engine
voltage?
NO
Check wiring
from J1 and J2
for proper
connection. If
proper
connection is
detected,
repair or
replace engine
alternator.
YES
Go to step 5.
Does the
clutch
engage?
YES
Replace the
potentiometer.
NO
YES
Replace the
transducer.
Connect a
test
transducer
to the
board.
Does the
clutch
engage?
NO
Replace
the
control
board.