Troubleshooting
Control Board Malfunction
Troubleshooting Procedure
(see following page for actual steps):
Remove control box cover. Turn sprayer ON. Observe control board Green and Red LED lights.
No light |
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Once | Normal operation |
Red light on | Control board |
continuously | commanding |
| engine to run |
Green light on | WatchDog |
Go to step 1. 
Does switch 
test positive?
NO |
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| Replace the |
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continuously | enabled |
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Flashing | See error code |
| section for further |
| troubleshooting |
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Red light on | Model not |
continuously with | selected |
potentiometer |
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OFF after a |
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replacement |
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board is installed |
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Go to step 3. Is
VDC present?
NO 
YES
Go to step 2. Do you have proper engine voltage?
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| Check wiring |
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| connection is |
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NO |
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YES |
YES
Connect
Go to step 4. Is
YES
Mechanical problem. Repair or replace clutch/pinion assembly.
NO
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.
Go to step 5. Does the clutch engage?
YES
Replace the potentiometer.
atest transducer to
NO |
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8 | 3A0243A |