Grain Systems PNEG-1181 User Manual
Page 57
9. Wiring Reference
PNEG-1181 Portable Dryer Troubleshooting
57
Testing Procedures and Location of Grain Temperature Sensors
The grain sensors terminate at the Heater Board located by the fan/can housing. Single module with two
fans, grain sensors are wired to bottom heater board. On a stack dryer with multiple fan/heaters, the
sensors will be terminated on the bottom Heater Board of the second module. It does not matter if the
second module has one fan/heater or two fan/heaters. If a bad sensor is suspected, always check the
heater board first. There are two white wires connected to J7-18 and two black wires connected to
J7-14. Check the resistance of the (thermistor) sensor according to the temperature in the grain column.
Disconnect the two sets of wires and with the meter set to ohms scale, place one meter probe on the
black set of wires and the other probe on the white set. It should read somewhere close to the
. Example: Temperature 70°F should read about 11K on the meter. If this does not = 11K go
back to the white junction boxes as indicated above.