Great Plains NP4000B Operator Manual - Manual (Page 118)

114 2013+ NP4000/A/B Table of Contents Index Great Plains Manufacturing, Inc.
417-199M Table of Contents Index 2014-05-14
Low Manifold
Pressure
Pump not primed Factory-installed pump: check bleed line for plugging.
Second pump: open petcock valve or check bleed line.
Mis-adjusted bypass valve in pump
motor Close valve or re-adjust for Open Center system (see pump
manual)
Impeller or volute worn Repair pump.
Excess
Material
Remaining
(but no
alarms) Incorrect console setup Re-check METER CAL and BOOM CAL.
Flow meter malfunction Consult dealer.
Material
Consumption
Too High (but
no alarms) Incorrect console setup Re-check METER CAL and BOOM CAL.
Flow meter malfunction Consult dealer.
No Fertilizer
Flow Pump not primed Factory-installed pump: check bleed line for plugging.
Second pump: open petcock valve or check bleed line.
Strainer plugged Close all valves. Inspect strainer (page 129). Clean screen
as needed.
Material run-out Check tank level.
Problem Cause Solution