OPERATOR’S MANUAL
Control Point
®
11001-1489-201702 Rev B
TROUBLESHOOTING / 91
APPLICATION RATE ERROR
Probable Cause
If an APPLICATION RATE ERROR flashes on the display and the alarm
sounds, a fully open valve is indicated but the target APR cannot be
achieved.
Corrective Action for Granular System
1. Reduce the truck ground speed to allow the system to catch up and the
error to clear.
2. Shift to a lower gear to increase engine RPM and hydraulic pump
rotation.
3. Check hydraulic disconnects and filter.
4. Ensure correct spreader constant is programmed into console. Check
original setting or run a Granular Calibration (F6).
5. Incorrect PWM SAT setting (See Granular Configuration screen - F3).
Compare against original setting or run System Response on the
Granular channel (F11) setting.
6. Check for insufficient hydraulic oil flow at normal engine RPM.
7. Check spreader valve, electrical connections to the valve coil,
resistance of the coils (See manufacturers specifications), and verify
voltage from control console.
Corrective Action for Liquid System
1. Check to see if the liquid tanks are low, shut off valves are partially
closed, bypass valves are open too far, or an obstruction is in the liquid
tank outlet.
2. Check filters between the liquid tank and suction side of the liquid
pump for blockage.
3. Check for plugged nozzles or nozzles that are too small to supply
sufficient gallons per minute.
4. If using a electric liquid pump, check that the nozzle pressure (spray
bar pressure) does not exceed 40 psi. Some electric pumps have an
internal pressure switch to shut pump off high back pressure
conditions.
5. Ensure a correct K-FACTOR is programmed. Compare it against the
number stamped on the flowmeter body or recorded on the Calibration
Data Record Sheet. If original settings are not available, run a Liquid
Calibration (F6).
6. Observe the PWM SAT under the Liquid Configuration screen (F5).
Compare against original setting. If not available, run a System
Response on the Liquid Channel (F11).
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