Grain Systems PNEG-1181 User Manual
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PNEG-1181 Portable Dryer Troubleshooting
8. Troubleshooting Tips
Possible Safety Circuit Shut Down Messages (Continued)
4. Make adjustments on air pressure switch one quarter turn at a time.
5. Clean air pressure switch tube to make sure it is not plugged.
6. More on how to adjust air switch
.
AIR SWITCH X STUCK
Air Switch 1 Stuck:
Air pressure switch contacts have closed prior to the fan starting, indicating a
freewheeling blade or improper adjustment of the air switch. The error message will show on which fan
the error occurred.
HOUSING X HIGH LIMIT
Housing 1 High Limit:
This occurs when there is an overheat in the fan housing of 200°F and a
thermo disc has opened. It is located directly on top of the individual fan housing and must be manually
reset. The high limit is wired directly to the fan/heater interface mounted to that particular fan. If it does
not clear after resetting and pushing the stop button, check the fan/heater interface. The error message
shows on which fan/heater the error occurred.
Use a voltmeter on the following terminals:
Black probe (J7-10) DC negative
Red probe (J7-16) 12 VDC output
Red probe (J7-02) 12 VDC when closed
GRAIN X OVERHEAT
Grain 1 Overheat:
This occurs when the grain temperature in one of the columns has reached
210°F. The fixed temperature thermo disc has opened. This will automatically reset when it cools down.
Check each grain column and make sure the grain is moving down the column screen. If it does not clear
after pushing the stop button, check the fan/heater interface.
Use a voltmeter on the following terminals:
Black probe (J7-10) DC negative
Red probe (J7-08) 12 VDC output
Red probe (J7-05) 12 VDC when closed
PLENUM X OVERHEAT
Plenum 1 Overheat:
This occurs when the plenum temperature inside the plenum has reached
300°F. The fixed temperature thermo disc has opened. This will automatically reset when it cools down. If
it does not clear after pushing the stop button, check the fan/heater interface.
Use a voltmeter on the following terminals:
Black probe (J7-10) DC negative
Red probe (J7-15) 12 VDC output
Red probe (J7-03) 12 VDC when closed