Troubleshooting guide

Page 34
Attention: There is a difference in Diagnostic Lights between first Generation
Digital Control Boards and second Generation Control Boards. First generation
control boards do not have a separate Diagnostic light. If the High Limit trips the
auger shuts off and eventually when the stove shuts down the #3 LED starts to flash.
Second Generation Digital Control Boards have a Diagnostic code specifically for
the High Limit Switch. The #2 and #3 LED lights flash at the same time.
Items to check if the switch has tripped:
 If the Manual High Limit switch has been reset and the stove starts up,
look for a reason that would cause the High Limit Switch to trip.
a) Inspect the Convection blower and see if it is running once the Proof of
Fire switch locks in. If the convection fan isn’t running, inspect the wiring
for a loose connection.
b) Check to see if the Convection blower is getting voltage from the control
board. If voltage is present, Hot-wire the fan to double check the blower.
If the blower still doesn’t come on, replace the blower.
c) If there isn’t any voltage at the fan and the fan runs when Hot-wired,
carefully check for voltage on the pin-out on the control board. If no
voltage is present at the control board indicates a bad Control Board and
needs to be replaced. (See note on previous page indicating when voltage
is present. Voltage reading will be between 80 volts and line voltage.)
d) If the blower is running and the stove has been in use for some time, check
the blower for a build-up of dust, lint or pet hair. When the squirrel cage
gets dirty, it can’t move the proper amount of air and the stove could
overheat and shut down.
 If the switch has been reset and the auger does not come on the next time
you start the stove, unplug the 2 Orange wires from the switch and check
the switch for continuity. Replace if it’s defective.
 Unplug the Orange wires and check for voltage at the Orange wires.
First Generation Digital Control Boards have Line Voltage on that
circuit. Second and Third Generation Digital Control Boards have 5
volts DC. (First Generation Control Boards do not have the Thermostat
Slide Switch on the front of the board .All other generations have the slide
switch.)
 If there isn’t any voltage on any of the Orange wires, carefully check for
voltage on the pin-out on the control board. If no voltage is present on the
control board the control board is bad and needs to be replaced.
Remember: There will only be voltage on one pin at the control
board.
 If the switch is not defective, check to make sure the Orange wires are
inserted properly into the Molex connector that plugs into the control
board. They may appear to be inserted properly, but sometimes are not
connected to the pins on the control board.