Grain Systems PNEG-1181 - Manual (Page 23)

PNEG-1181 Portable Dryer Troubleshooting 23
8. Troubleshooting Tips
Possible Safety Circuit Shut Down Messages
Viewing the Shut Down History
The shut down history can store up to 200 shut down warnings. When the dryer exceeds this amount,
the oldest shut down will be erased and replaced with the current shut down warning.
To view the shut down history (Warnings):
• Turn the Control Power to ON.
• Wait until the time and date screen appears and then press the START button.
• Press the increase and decrease buttons at the same time while the dryer is stopped. Then,
scroll through the history by pressing either the increase or decrease buttons. Press enter
to exit this screen or press stop to clear the shut down warning.
Shut Down Message Listing
The following is a list of all possible shut down messages for the network dryer. They are broken down
with their associated controller where the error originated. The message on the screen will show
WARNING at the top followed by the error, time, date and in which fan/heater the error occurred.
FAN X LOSS OF AIRFLOW
Fan 1 Loss of Airflow: The contacts in the air switch have opened due to insufficient air pressure in
the plenum. The message will identify which plenum caused the shut down.
Hints
Verify that the fan is running and that the dryer is completely full of grain. If the air pressure switch is
sensing air pressure, the blue light in the fan switch will come on after the fan has reached half speed. If
it does not, adjust the air switch using a straight blade screw driver to turn the adjusting screw on the air
switch counter-clockwise.This will make it more sensitive to air pressure. If this does not solve the problem,
inspect the wiring circuit of the air pressure switch. Each air pressure switch is wired to the Network
fan/heater Interface located on each individual fan/can box. Use a voltmeter on the following terminals:
If all this fails to work, remove the wires from the air pressure switch and remove the switch from the
dryer. Blow into the air tube to simulate air pressure in the plenum. The switch should have an open
circuit. Blow into the switch to close it. If it fails to close try adjusting it or replacing it.
Remember
1. Dryer must be full of grain. (Make sure fill is keeping up with unload.)
2. Check to see if light comes ON when fan is running.
3. Make sure the bulb is good. It is a 110 VAC.
Black Probe (J7-10) DC Negative
Red Probe (J7-09) 0 VDC Fan Running Red Probe (J7-09) 5 VDC Fan Stopped
Red Probe (J7-11) 5 VDC Fan Running Red Probe (J7-11) 0 VDC Fan Stopped
If operating correctly, the voltmeter should display the reading listed above.
Any other reading may indicate a bad switch, computer board, air pressure
switch or wiring.