Great Plains YP1625 Operator Manual - Manual (Page 76)

401-226M-A 03/12/2012
72 YP1225 and YP1625 Great Plains Manufacturing, Inc.
Troubleshooting
Note: For seed monitor issues, see also the DICKEY-john
Planter/Drill Control Operator’s Manual,
“TROUBLESHOOTING & ALARMS” section..
Problem Cause Solution
Population
Alarms False alarms or actual seed rate
errors due to monitor setup with
incorrect row count, spacing or
active rows Review planter configuration and monitor setup.
Planting too
little Incorrect seed rate. Check seed rate information and planter rate setup.
Incorrect seed wheel cell count or
finger count. Use chart rates for installed components, or replace wheels
or finger meters. Charts are based on either 6 finger or 12
finger meters or various wheel counts.
Incorrect seed wheel cell size can
cause skips Install meter wheels with cell sizes recommended for seed
size.
Brush too tight on finger meter Adjust brush (page 68).
Low contact drive tire pressure Inflate all tires to recommended levels (page 111).
Meter drive not engaged Engage drive coupler (page 67)
Incorrect fan airflow Adjust fan speed to recommended rpm (page 39).
Employ baffle in unusual situations (page 50).
Excessive field speed. Reduce field speed.
Incorrect tire size or air pressure. Use correct chart for tire brand and model (see Seed Rate
manual). Use correct air pressure, page 111.
Actual field size is different. Verify field size.
Excessive gaps between planter
passes. Adjust marker, page 49.
Plugged row-unit seed tube. Lift planter, expose bottom of seed tube and clean out.
Thrown or worn drive chains Check drive chains.
Worn sprockets, chain idlers or
meter components. Replace worn items.
Loose assemblies in finger meters Have dealer service meters.
Improper main shaft sprocket. Check sprockets. Hydraulic drive uses 23-tooth. Ground
drive uses 25-tooth.
Improper gap on speed sensor. Check speed sensor on planter for 1 ⁄
16
in to 1 ⁄
8
in (1.6-3.2mm)
gap from wheel. Improper gap can cause erratic speed sig-
nal causing monitor to falsely report improper planting rate.
Incorrect speed sensor constant Perform speed calibration per DICKEY-john monitor manual.
Rate may not actually be low When planting volumetric seeds, the monitor functions as a
blockage detector, and does not count all seeds.