Great Plains NP3000A Operator Manual - Manual (Page 103)

Great Plains Manufacturing, Inc. Table of Contents Index Troubleshooting 99
2014-04-22 Table of Contents Index 407-613M
Rate Alarm, High
Incorrect VALVE CAL for Control Valve or
METER CAL for flow meter. Recheck console setup against
values provided for components
(page 44).
Control Valve failed, or harness status Suspend operation (page 63).
Close emergency shut-off valve.
Discharge line from emergency
shut-off valve to tines.
Wait for applicator to be safe to
approach.
Check harness connections and
fuses.
Use console SELF-TEST mode to
command rate to zero open. Check
valve ball indicators at valves.
Command rate to maximum. Check
ball indicator.
Excess NH
3
Remaining
(but no alarms)
Incorrect console setup Re-check METER CAL and BOOM
CAL.
Field size different. After ruling out metering problems,
re-check geography.
Excessive gaps between fertilizer applicator
passes. Gap between opposing pass end
trenches should be one row space
(e.g. 30in)
Flow meter malfunction Consult dealer.
NH
3
Consumption Too
High (but no alarms)
Incorrect console setup Re-check METER CAL and BOOM
CAL.
Field size different. After ruling out metering problems,
re-check geography.
Excessive overlap Gap between opposing pass end
trenches should be one row space
(e.g. 30in). Also check tracks for
unintended re-applications,
particularly if relying on GPS
mapping.
Tank or system Leak Suspend application. Carefully
approach applicator and nurse tank
from up-wind. Check for leaks in
Flow meter malfunction Consult dealer.
Rows Not Fertilized Check for plugged row-unit tube Stop application per page 64. Lift
applicator and inspect tines. Clear
any plugging per “Clearing Plugged
Tines” on page 110.
Failed or malfunctioning aftermarket section
control. Consult system supplier
documentation.
Problem Cause Solution