TITLE
44 Troubleshooting
TROUBLESHOOTING
Do not overlook the obvious. Check pump, sole-
noids, hoses, improper installation, etc.
The 8160 is easy to troubleshoot if you ap-
proach it in an organized manner. There are four
primary parts. 1) The 8160 Console, 2) Speed
Sensor, 3) Flowmeter, and 4) Servo Valve. Your
main objective when troubleshooting is to isolate
the problem and find out which of the four parts
is defective.
The 8160 has been designed with internal pro-
tective circuitry. It protects the console from
damage due to shorts caused by pinched wires,
or connectors being plugged in wrong. Exces-
sive current draw from the servo valve is also
protected.
If your Rate or % Error becomes erratic, one
possible cause could be the servo valve is start-
ing to require excessive current to operate. The
console will begin to protect itself by limiting this
current.
Extreme overheating of the console will cause
it to shut itself off until the temperature is re-
duced.
The following table will help you avoid unneces-
sary testing by isolating the affected sensor(s)
and calibration numbers used for each mode.
The next step is to narrow the problem(s) down
to one of the two sensors. The top half of the
following table indicates which sensors are used
for the various modes.
For example, assume Total Gallon is not work-
ing properly. From the table we can see that only
one calibration number is used, the Pulses Per
Gallon.
First double check the calibration number, mak-
ing sure that it is programmed in correctly, then
check the flowmeter.
If the table indicates two sensors are used for a
mode, such as ‘RATE 1 or RATE 2, then you can
isolate the faulty sensor by testing other modes
which depend upon only one of the sensors. Us-
ing the AREA or SPEED mode will test the speed
sensor accuracy.
TROUBLESHOOTING CHART
SELECTED MODE
SPEED
MPH
VOLUME
TOTAL
GALLON
AREA
TOTAL
ACRE
RATE
GAL/ACRE
GPA%
ERROR
RATE 1
OR
RATE 2
Sensor
Used
SPEED SENSOR
X
X
X
X
X
FLOWMETER
X
X
X
X
Calibration
Numbers Used
SPEED
X
X
X
X
X
PULSES/GALLON
X
X
X
X
BOOM WIDTH
X
X
X
X
VALVE RATE
X
X
X
Summary of Contents for 8160
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