Grain Systems PNEG-728 - Manual (Page 24)

Autoflow Operation
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current grain temperature is below the grain
temperature setpoint on the moisture control
thermostat. If the dryer is stopped when “temp
hld” is flashing on the screen, two minutes will be
entered into the dry timer when the dryer is re-
started.
Loading
When the display on the dryer control
panel is flashing “loading”, the fill system(s) are
running.
Drying
When the display on the dryer control
panel is flashing “drying”, the dryer is in the dry
cycle, the main drying fan(s) are running, and the
load augers are not running.
Cooling
When the display on the dryer control
panel is flashing “cooling”, the dryer has been set-
up as an Autobatch unit and is in the cool cycle.
Error Messages
When the dryer shuts down, the user can
quickly determine what caused the shutdown by
viewing the display on the dryer control panel.
Burner 2 Warning Flame Not Detected
The flame sensor in burner number two has
failed to detect flame. Either the burner failed to
light or the flame sensor needs to be adjusted. The
flame sensor is the sensor attached to the burner,
and has a single lead. If the burner is lighting but
the unit is still shutting down; due to loss of flame,
the flame sensor needs to be adjusted. The flame
sensor can be adjusted by bending it so it is im-
mersed in flame. If the burner is not lighting,
make sure that the dryer is getting fuel, all sole-
noids are opening, and the ignitor is sparking.
Electrically there is a loss of 12vDC+ on J1-10 on
the input/output board.
Burner 1-Vapor High Temperature
The LP gas vapor temperature sensor,
located on the gas pipe train downstream from the
vaporizer coil, on fan and heater number one has
opened, indicating that the vaporizer coil is run-
ning too hot and must be adjusted. This sensor is
set at 200 degrees Fahrenheit and automatically
the fan is running and there is proof of airflow, the
burner is getting ready to ignite.
Unload
When the display is flashing “unload”, the
dump chutes have been lowered and the dryer is in
the dump cycle.
Temp HLD
When the display on the dryer control
panel is flashing “temp hld” the dryer is in the dry
cycle, the dry timer has reached zero, and the
The Electronic Monitoring Control System dis-
plays the error message and sounds a warning
signal to alert the user. The displayed error condi-
tions and their electrical cause are as follows:
Burner 1 Warning Flame Not Detected
The flame sensor in burning number one
has failed to detect flame. Either the burner failed
to light or the flame sensor needs to be adjusted.
The flame sensor is the sensor attached to the
burner, and has a single lead. If the burner is
lighting but the unit it still shutting down; due to
loss of flame, the flame sensor needs to be ad-
justed. The flame sensor can be adjusted by
bending it so it is immersed in flame. If the burner
is not lighting, make sure that the dryer is getting
fuel, all solenoids are opening, and the ignitor is
sparking. Electrically there is a loss of 12vDC+ on
J1-9 on the input/output board.
CONTROL SYSTEM