Grain Systems PNEG-1707 - Manual (Page 54)

11. Safety Circuit Shut Down Messages
54 PNEG-1707 TM-Series Tower Dryer
Grain Temp Short
This error indicates there is a shorted condition with one of the grain temperature sensors located inside
the left or right grain columns. This could be a shorted sensor or the sensor wires could be shorted.
Grain Overheat
An over temperature condition has occurred in one of the grain columns causing the control to shut down
the dryer. This control is set at 210°F (99°C) and automatically resets itself when cool. This can be
caused from a grain column plugged with trash or the meter rolls may be adjusted to slow. Feel the
grain columns to determine which one may be causing the problems. If all the columns are hot to the
touch then you will probably need to check the meter roll settings. If not, then examine the column that
feels hot, make sure you can see the grain moving down the column screens. For more information on
service see meter roll servicing.
Housing High-Limit
The temperature High-Limit located on the fan/burner housing has opened, indicating an over
temperature condition has occurred towards the rear of the fan/heater housing. This control is set at
200°F (93°C) and must be manually reset. The message will distinguish between which fan housing
caused the shut down. The reference to the number one (1) is telling you that it is fan number one (1)
which is the bottom most fan.
Ignition Failure
This condition happens during the initial ignition of the burner. If the burner fails to light, check to make
sure that the gas has been turned ON and/or the maxon valve has been turned ON. The reference to the
number one (1) is telling you that it is burner number one (1) which is the bottom most fan.
Illegal Flame
This message is displayed when the flame detection circuit of the heater is sensing flame when the
burner is supposed to be OFF. Example, if you shut down the dryer and the heater continues to burn
due to a solenoid stuck in an open state, it will generate this type of error.
Motor Overload
One of the thermal overloads on either the fan, load, unload or auxiliary motors has opened, indicating
an over current condition. The overloads must be manually reset. The message will distinguish between
which fan overload caused the shut down. The reference to the number one (1) is telling you that it is fan
number one (1) which is the bottom most fan.
Vapor High-Limit
The LP gas vapor temperature sensor located in the gas pipe train downstream from the vaporizer,
has opened indicating that the vaporizer is running too hot and must be readjusted. This sensor is
set at 200°F (93°C) and automatically resets itself when cool. The message will distinguish between
which burner caused the shut down. The reference to the number one (1) is telling you that it is burner
number one (1) which is the bottom most fan/heater unit, is where the malfunction is located. Try
adjusting the vaporizer coils farther away from the burners flame. You may also want to try switching the
burner mode from High/Low to ON/OFF, especially on warmer days.