Great Plains 2420P Operator Manual - Manual (Page 86)

2410P and 2420P
118-769M 2012-04-17
84
a. Re-set pop-out indicator if necessary.
It is a good idea to keep a filter element on hand, and we recommend changing at a minimum on an annual basis.
1. Between planting seasons, store cab console inside a relative-
ly stable and dry environment.
2. Avoid direct spray from high pressure washers on the motor
encoder and the external controller box. These units are
sealed from normal moisture, but high pressure could inject
water into the housing.
3. Keep electrical connects free from dirt and grease. It’s a good
idea to occasionally spray the terminals with contact cleaner to
ensure proper connection.
Troubleshooting
Drive will not rotate: (see Troubleshooting flow chart and elec-
tronics overview)
1. Check cab console
b. No power to cab console - check with voltmeter.
c. Upper line (set) is visible but no lower line (out rate and
speed) on display: move to Communication troubleshoot-
ing below.
d. 1 ro 10 amp fuse on power cable may be blown.
e. Engage button is not on - check to see if green indicator light is
on.
f. Use Cab Console Power Tester (PN 27857) to check power out
of cab console. Install tester on round 7 pin power/com cable
from cab console. Turn drive on. Green LED shows power to ex-
ternal controller. 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 connected.
b. If no lower line on cab console appears (speed and output rate),
and drive will not rotate in calibration mode, use Cable Continuity
Tester (PN 27859) to test power and communication to external con-
troller. (WARNING: TO PREVENT DAMAGE TO COMPONENTS,
DISCONNECT POWER/COM CABLE FROM CAB CONSOLE AND
EXTERNAL CONTROLLER BEFORE INSTALLING THIS
TESTER). Install 4-pin test plug on end of 4-pin power/com cable 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 Conti-
nuity Tester and 4-pin test plug from ends of power/com cable. Reattach power/com cable to cab console and ex-
ternal controller.
d. If power/com cable tester shows power and communication is reaching external controller from cab console, and
no lower line appears on cab console, replace chip or external controller. Call Service Department.
e. If Cable Continuity Tester (PN 27859) isn’t available, check cable with voltmeter at connection at control module.
3. Test Relay inside external controller
a. Use Relay Output Tester (PN 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, relay or external con-
troller may need to be replaced. Call Service Department.
Element
Pop-Out
Indicator
Figure 1 and 2.
Filter Element and Pop-Out Indicator