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)
PLENUM TEMP SHORT X
Plenum Temp Short 1:
This error indicates a shorted condition with the plenum temperature sensor
located inside the plenum chamber. This could be a short in the sensor or the sensor wires. These
sensors are wired to a fan/heater interface, which sensor contains the short depends on number of
plenums. The error message will show in which plenum the short occurred. Refer
for location of the actual sensors.
The terminals they are wired to are as follows:
Plenum Temp Sensor Ground - (J7-13)
Plenum Temp Sensor - (J7-12)
FLAME LOSS X
Flame Loss 1:
This error indicates that the flame probe has failed to detect a burner flame that had already
been established. This may be caused by the flame probe not being directly in the flame path, loss of fuel, or
a problem with the burner circuit. Sometimes, the loss of flame occurs when the burner cycles to Low Fire. To
correct this error, adjust the gas pressure or adjust the flame probe to where it is in the flame path at all times.
Remove the access door on the side of the fan/heater housing to allow access to the flame probe.
Another way to see if the burner is sensing flame correctly is to watch the light in the burner switch. If it
starts to flicker, an adjustment may need to be made on the flame probe. The flame probe wire and
ground wire are connected to the fan/heater interface. The error message will show in which heater the
flame loss has occurred.
The terminals they are wired to are as follows:
Flame Probe Ground - (J7-20)
Flame Probe Wire - (J7-19)
IGNITION FAILURE X
Ignition Failure 1:
This happens when the burner fails to light. Make sure the fuel source has been
turned ON, all valves are ON, especially the Maxon valve. The Maxon valve has to be reset every time
an error occurs or there is a loss of power. Check the wiring, igniter gap (which needs to be about 1/8")
and make sure there is a spark. The igniter is located inside the fan/heater housing and the wiring
from it goes directly to the ignition transformer, which is located in the fan/can box on the outside of the
fan/heater housing. Access the igniter by removing the access door on the side of the fan/heater housing
or entering through the rear door of the dryer.
Power to the ignition transformer is received from the fan/heater interface. The error message will show
in which heater the ignition failure has occurred.
The terminals the ignition transformer are wired to are as follows:
Transformer Ground - (J6-02) AC Neutral
Transformer Power - (J6-06) AC Power 120 VAC
Make sure power is OFF while adjusting the gas pressure or flame probe to
correct the Flame Loss error.
Make sure power is OFF while adjusting the igniter.