Grain Systems PNEG-1181 - Manual (Page 29)

8. Troubleshooting Tips
PNEG-1181 Portable Dryer Troubleshooting 29
Possible Safety Circuit Shut Down Messages (Continued)
METER ROLLS FAILED
This is usually caused by either a defective meter roll sensor or the meter rolls not turning because of a
broken drive chain, jammed meter roll, bad motor or gear case. The meter roll sensor is located in a
white plastic box on the rear of the dryer. The box is mounted on the end of the meter roll drive shaft.
12 VDC is sent out to the meter roll sensor, which in turn sends a pulse signal back to the terminal strip
in the upper panel. (The meter rolls must be turning in order for the pulse signal to return). After checking
to make sure the meter rolls are turning, the following may need to be checked.
Refer to the Network Dryer Meter Roll Sensor Rearview Wiring in the manual.
Use a voltmeter on the following terminals:
Black probe - (J3-04) 12 VDC negative
Red probe (J3-07) 12 VDC output
Red probe (J3-03) meter roll return (If you are not able to read a pulse signal with your meter. Set your
meter to read DC voltage and you should be able to read a varying DC voltage. Some where between
0 VDC and 12 VDC).
OUT OF GRAIN
The Out of Grain Timer has timed out. A mercury switch located on top of the dryer in a white plastic box
resets the timer. It is connected to a paddle that is moved by grain as the dryer fills. Shut down usually
occurs when the loading equipment has difficulty keeping up with the dryer output or when the wet
supply has run out of grain. The length of time set for the timer can be increased, however, the top
hopper of the dryer should always have grain in it. If the side screens open up at anytime, the dryer is
losing heat as well as efficiency. Therefore, the fill equipment must be big enough to handle the capacity
of the dryer. Also, keep in mind that the Out of Grain Timer is only in operation when the load switch is
in the AUTO position.
Black probe - unused terminal where the network connections are terminated (Input/Output Board)
Red probe (J3-07) 12 VDC output
Red probe (J2-01) 12 VDC when the dryer is calling for grain
Red probe (J2-01) 0 VDC when the dryer is full
Master Display Generated Errors
The following is a list of errors that come from the Master Display Board located in the lower control box.
CONT-BATCH MODE CHNG
This error occurs when switching the dryer mode switch from the Continuous Flow to the Staged Batch
mode while the dryer is running. To avoid this shut down, stop the dryer before switching modes. Press
the stop button to clear.
NETWORK FAILED: FH1
This error is generated when a fan/heater board (near the fan/can housing) loses its communication link
with the Input/Output board (on the upper control panel) and the Master Display Board (on the lower
control panel). Check the blue and yellow wires marked N1-01 and N1-02 on a three (3) terminal plug
to make sure they are plugged in tightly. Also check and make sure the blue and yellow wires have
continuity between each other (blue to blue and yellow to yellow). The error message displayed will show
which fan/heater has lost communication. Example FH1-FH2-FH3 etc. Press STOP to clear.