Great Plains 1525P Operator Manual - Manual (Page 93)

8/14/2006 118-949M
91 Veris Drive Operating Instructions
Troubleshooting
Drive will not rotate: (see Troubleshooting flow
chart and electronics overview pages 86-87)
1. Check cab console
a. No power to cab console - check with volt-
meter.
b. Upper line (set ) is visible but no lower line
(out rate and speed) on display: move to
Communication troubleshooting below.
c. 1 or 10 amp fuse on power cable may be
blown.
d. Engage button is not on - check to see if
green indictor light is on.
e. Use Cab Console Power Tester (part
#27857) to check power out of cab con-
sole. Install tester on round 7 pin power/
com cable from cab console. Turn drive on.
Green LED shows power to external con-
troller. Red LED shows power to solenoid.
If LED lights are not lit, double-check power
and connections; replace cab console if
needed.
2. Check Communication between cab console
and drive
a. Check to see if power and communication
cable (main harness) is properly connect-
ed.
b. If no lower line on cab console appears
(speed and output rate), and drive will not
rotate in calibraton mode, use Cable Conti-
nuity Tester (part # 27859) to test power
and communication to external controller.
(WARNING: TO PREVENT DAMAGE TO
COMPONENTS, DISCONNECT POWER/
COM CABLE FROM CAB CONSOLE AND
EXTERNAL CONTROLLER BEFORE IN-
STALLING THIS TESTER) Install 4 PIN
TEST PLUG on end of 4 pin power/com ca-
ble before powering the Cable Continuity
Tester - remove before reattaching power/
com cable directly to cab console.
c. If Cable Continuity Tester shows power is
getting to external controller, turn power off
and remove Cable Continuity Tester and 4
pin test plug from ends of power/com cable.
Reattach power/com cable to cab console
and external controller.
d. If power/com cable tester shows power and
communication is reaching external con-
trollerfrom cab console, and no lower line
appears on cab console, replace chip or
external controller. Call Service Depart-
ment.
e. If Cable Continuity Tester (part #27859)
isn’t available, check cable with voltmeter
at connection at control module.
3. Test Relay inside external controller
a. Use Relay Output Tester (part #27860) to test
relay inside external controller. Install tester to
weather-pak solenoid connector from external
controller. With tractor engine off, start drive
calibration function. Auditory alarm should
buzz for 1.5 seconds when drive is engaged in
calibration mode. If alarm does not sound, re-
lay or external controller may need to be re-
placed. Call Service Department.
4. Check hydraulics
a. Check to see if hydraulic lever is in detent po-
sition.
b. Hydraulic lever is in wrong detent direction - a
check valve at outlet of motor prevents reverse
rotation.
c. Make sure that both hoses are properly con-
nected to tractor remotes.
d. Inadequate system pressure. Place pressure
gauge at filter and check reading. If system
pressure is below tractor specifications, check
system.
e. Power solenoid directly: DANGER: RAPID
DRIVE ROTATION MAY OCCUR AND CAUSE
SERIOUS INJURY. KEEP CLEAR OF DRIVE
AREA.
!
DANGER
Rapid drive rotation may occur and cause serious injury.
• Disengage Hydraulics
• Reduce flow to 30 - 50%
• Power solenoid directly by connecting pow
er weather-pack connector to solenoid
weather-pack connector. If drive doesn’t
rotate, proportional coil (PN 19799) may
be defective. Check continuity with meter,
or energize with 12v power and check for
magnetic pull with small screwdriver. Dou-
ble-check connections on solenoid cable.
If solenoid energizes but drive does not ro-
tate when powered directly, tractor hy-
draulics are not properly engaged.
f. Excessive torque in drive system. Disconnect
main drive chain to check for rotation under
zero load. Check for a problem with the me-
chanical portion of drive, such as foreign mate-
rial wedged in meter, frozen bearings,
misaligned chains, or swelled grain in meter.
Install pressure gauge at motor inlet. Pressure
should be 1000 - 1500 psi. If pressure is above
2000 psi, significant torque problems are
present.