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Troubleshooting
332919C 25
Control Board Malfunction
Troubleshooting Procedure
(see following page for actual steps):
Go to step 5.
Does the
clutch
engage?
Go to step 2.
Do you have
proper engine
voltage?
Go to step 4.
Is 1-3 Ohms
reading pres-
ent?
Mechanical
problem. Repair
or replace
clutch/pinion
assembly.
Replace the
potentiometer.
Go to step 3.
Is 10-12
VDC
present?
Check wiring
from J1 and J2
for proper con-
nection. If proper
connection is
detected, repair
or replace engine
generator.
If low resistance is
present in step 4,
the problem is a
shorted field.
Replace pinion.
If an open in the
wiring is present,
check pinion
wiring
connections.
Connect
a test
transducer to
the board.
Does the
clutch
engage?
Go to step 1.
Does switch
test positive?
Replace the
switch.
Remove control box cover. Turn
sprayer ON. Observe control board
Green and Red LED lights.
No light
Once Normal operation
Red light on
continuously
Control board
commanding
engine to run
Green light on
continuously
WatchDog
enabled
Flashing See error code
section for further
troubleshooting
Red light on
continuously with
potentiometer
OFF after a
replacement
board is installed
Model not
selected
YES
NO
NO
NO
YES
Replace
the
control
board.
NO
NO
YES
Replace
the
transducer.
YES
YES
NO
YES