Grain Systems PNEG-526 - Manual (Page 38)

TROUBLESHOOTING Tower Dryer Operations & Service
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The GSI & Zimmerman Tower dryers are designed to be self diagnosing. Most electrical or operating problems are
displayed on the screen of the operator interface and the problem area is graphically high lighted. Always insure that either
240 or 480 volt 3 phase power is being provided to the dryer. All motor starters coils and the burner circuitry operate at 120v
AC. All of the safety circuit on the dryer operates at 24v DC.
Listed below are potential trouble shooting issues associated with the dryer and possible solutions to the problems.
TROUBLESHOOTING – DRYING ISSUES
Problem What to do
Low dryer capacity. - Check to make sure the dryer is always full of grain.
- Check all grain columns to make sure they are all moving.
- Check outside dryer screen for dirt build up. Clean if necessary.
Grain moisture discharges - Reduce unload rate.
too wet. - Or increase drying temperature.
Grain moisture discharges - Increase unload rate.
too dry. - Or decrease drying temperature.
Grain moisture discharges - Check that plenum temperature is being held consistent.
inconsistently. - Check for widely varying incoming moistures.
- Check for plugged grain columns.
- Verify that an adequate supply of grain is being provided to the dryer to
maintain a grain seal within the dryer.
Burnt or scorched kernels - Some varieties of grain or frost damaged grain are sensitive to higher
appear during drying. drying temperatures. Lower drying temperatures.
- If dryer is equipped with an external LP vaporizer, insure that liquid
propane is not passing through the vaporizer and going to the dryer.
Grain not moving through - Check the dryer for fines build up within the column. Empty if necessary.
grain columns. - Do not leave the dryer full for extended periods of time or during rainy
weather without occasionally moving grain through it.
TROUBLESHOOTING – BURNER
Problem What to do
Pilot will not light. - Check to see that the gas shutoff valve is open.
- Verify that gas is being provided to the dryer by checking the presure gauge
located in the pilot line.
- Verify that the pilot solenoid is opening by listening for a “clicking” sound.
- Remove the pilot line from the pilot solenoid with the dryer turned off to verify
that no water is in the pilot line. Blow the pilot line out with compressed air.
- Before reattaching the pilot line attempt to light the pilot with the line
removed. Gas should be flowing from the pilot solenoid.
- If gas is flowing, reattach the pilot line and adjust of flow of gas by adjusting
the pilot regulator.
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