Troubleshoot Dual Set-Point and Active Pneumatic Down Force
System
Symptom
Problem
Solution
Compressor does not run.
No hydraulic pressure or flow.
Tractor raise/lower
hydraulic circuit must be in the continuous retract detent position.
Planter raised
Planter must be lowered
in plant position.
Row unit height switch not functioning.
Properly adjust row unit height switch.
Verify wiring harness
connections to row unit height switch.
Hydraulic motor solenoid valve not functioning.
Verify hydraulic motor solenoid electrical connection.
Check and repair solenoid
wiring harness.
Check continuity of
solenoid coil. Replace coil.
Bad pressure switch.
Remove all air pressure
from air storage tank. Unplug pressure switch. Check continuity across
switch wires. If no continuity, replace switch.
Row unit down force does not increase or decrease.
Increase or decrease solenoid valve stuck closed.
Actuate manual override
for increase or decrease solenoid valve several times. Remove all
air pressure from system. Clean or replace solenoid valves. Shop air
and tire pressure gauge can be used to adjust air pressure in air
spring circuit manually until problem can be fixed.
Open circuit on solenoid wires (caution screen appears
on GreenStar™ display and diagnostic trouble code is set).
Check and repair wiring
harness.
Open circuit within solenoid (caution screen appears
on GreenStar™ display and diagnostic trouble code is set).
Check continuity of
solenoid coil. Replace solenoid.
Air spring circuit relief valve opens.
Increase solenoid valve stuck open.
Actuate manual override
for increase solenoid valve several times. Relieve all pressure from
system. Clean or replace solenoid valve.
Weak relief valve spring.
Replace relief valve.
Tank circuit relief valve opens.
Pressure switch stuck ON.
Turn tractor key switch
OFF. With pressure in tank, unplug pressure switch connector. Check
continuity across switch wires. If there is continuity, replace switch.
Incorrect down force reading displayed on monitor.
Pressure sensor not calibrated.
Calibrate sensor. Refer
to INTEGRATED PNEUMATIC DOWN FORCE AIR PRESSURE SENSOR in SeedStar™
2 SETUP Basic Planter Configuration section.
Pneumatic Down Force solenoid circuit error.
PM2 controller has detected an open circuit or short
circuit in the pneumatic downforce increase or decrease solenoid circuit.
Check wiring harness
and electrical connectors from PM2 controller to pneumatic downforce
solenoids. Check continuity of solenoid coils.