40
Troubleshooting
(cont)
Troubleshooting Console Inputs & Outputs
SPEED INPUT
Turn the rotary switch to the Speed position and perform the
following procedure:
1. Disconnect the Speed sensor (yellow tie)
2. Using a voltmeter check for 12 volts between pins B
(white wire) and C (black wire)
3. Check the voltage between pins A (red wire) and C,
should be just over 9 volts
4. Using a jumper wire such as a paper clip bent in a “U”
shape, rapidly short together pins A and C, this should
product a Speed reading at the console.
If the above tests are successful, then the input is working,
see Troubleshooting the Sensors. If tests above fail, then
see external wiring schematics starting on page 10 and
perform same test further up the line towards console.
REMOTE HOLD INPUT
See schematic on page 19 to learn where to locate and
identify the remote Run/Hold input connector.
1. Disconnect the Run/Hold sensor.
2. Using a voltmeter, check for 12 volts between pins B
(white wire) and C (black wire).
3. Check the voltage between pins A (red wire) and C,
should be just over 9 volts.
4. Using a jumper wire such as a paper clip bent in a “U”
shape, short together pins A and C, this should cause
the Hold message to be displayed in the Seed Rate
display of the console if the Run/Hold switch is in the
Run position.
If above tests are successful, then the input is working, see
Troubleshooting the Sensors. If tests above fail, then see
external wiring schematics
and perform same test further
up the line towards console.
HYDRAULIC FLOW CONTROL VALVE
Disconnect valve from output and inspect the wire from
the connector to the motor housing for possible shorted or
open wires. C12VDC and ground across pins B and
C of the control valve connector, if the valve does not run
reverse the connections. The valve should run approximately
3.5 seconds each time you reverse the connections. If the
aforementioned test is successful then you need to test the
Control Valve Output. If not, then send control valve in for
repair or replacement.
CONTROL VALVE OUTPUT
To test the Control Valve Output, perform the following
procedure:
1. Set operating mode to Manual (MAN).
2. Toggle the console Run/Hold switch to Run. If the
Remote Run/Hold input is causing the console to remain
in Hold, disconnect the remote sensor.
3. Toggle at least one Section switch on.
4. Turn the rotary switch to anything but Seeds, Area or
RPM.
5. Connect a voltmeter or DC test light between pin B of
the Control Valve connector and C of the closest RPM
sensor input. It should measure 0 volts.
6. Have someone press the “+” button for about 5 seconds
then the “-” button for 5 seconds while you observe the
meter. The voltmeter should have pulsed toward 12
volts or the test light should have pulsed on during the
5 second period of one or the other. If the meter pulsed
toward 12 volts only when the “+” button was pressed,
then in step 8 the opposite will occur.
7. Now move the connection from pin B of the Control
Valve to connector C.
8. Have someone press the “+” button for about 5 seconds
then the “-” button for 5 seconds while you observe the
meter. The voltmeter should have pulsed toward 12
volts or the test light should have pulsed on. If in step
6 the voltmeter responded to the “+” and not the “-”
button, then in this test the results should be opposite.
If the above test was successful, then the output is good
and you need to test the Control Valve. If the test failed,
then see the external wiring schematics and perform the
same test further up the line towards the console.
SECTION BYPASS VALVE OUTPUTS
To test the Section Valve outputs, follow the directions
below.
To assist identifying inputs of interest, see external
wiring schematics starting on page 9.
1. Toggle the console to Run and toggle all section switches
off, the rotary switch can be in any position. If the remote
Run/Hold input is causing the console to remain in Hold,
disconnect the sensor.
2. Disconnect the output in question from valve.
3. Using a voltmeter or test light connect one lead to A and
the other to B.
4. The voltmeter or test light should be 0 volts or off while
the section switch is off and 12 volts or on when the
section switch is on.
The above test was good then the output is working and
you need to test the Motor Bypass Valve.
Summary of Contents for ProPlant
Page 1: ...Reference Manual ProPlant TM Automatic Seed Rate Controller...
Page 41: ...41 Appendices...
Page 47: ......
