Troubleshoot Single Set-Point Pneumatic Down Force System
Symptom
Problem
Solution
Compressor does not run.
Blown Fuse.
Check and replace tractor
convenience outlet fuse and compressor battery power harness fuse
(if used).
No electrical power at compressor.
Inspect compressor wiring
harness and battery harness (if used) and connectors for damage. Repair
or replace as required.
Bad pressure switch.
Remove all air pressure
from air storage tank. Unplug pressure switch. Check continuity across
switch wires. If no continuity, replace switch.
Bad relay.
Replace relay.
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.
Incorrect down force margin reading displayed on monitor.
Gauge wheel sensor not calibrated.
Raise planter to remove
load and zero all sensors.