5With the combi in the Hot Air mode with time on the timer, the door closed and the start switch is depressed
a The front display will include a lighted bar under the Hot Air symbol
•When the heat circuit is energized the heat symbol will be energized
•The cooking mode symbol will be energized.
•The time display will invert and begin to count down.
bThe fan circuit is energized by the Control Board (A10) transmitting and receiving a signal from terminals 5,6, and 7 on connector X10 to connector X12 on the Motor Drive Board (U10).
•The motor Drive Board sends a signal through the thermal switch in the motor from Terminal 5 and receives on terminal 6
•If the thermal switch is not open the Motor Drive Board (U10) sends 240 VAC 3 phase to the motor.
•The motor reverses direction every 120 seconds with a 15 second coast.
•NOTE: If the set temperature is less than 212 degrees F than fan will be pulsed on for 2 seconds every 60 seconds after the cabinet set temp (B6).
cHot air heat circuit is energized
•A signal is sent from terminal 8 of connector X15 on the Control Board (A10) to terminal 4 of connector X2 on the Hot Air Power Burner and Fan Control (U20) selecting the set speed of the combustion blower.
◊When this speed is attained the signal is sent from terminal 2 of connector X2 on the Hot Air Power Burner and Fan Control (U20) to terminal 2 of connector X15 on the Control Board (A10)
•A request for heat is sent from terminal 3 of connector X12 on the Control Board (A10) to terminal 10 on connector X1 on the Hot Air Control Module (N20)
◊24 VAC is sent from terminal 2 of connector X2 on the Hot Air Control Module (N20) to the hot surface igniter (R20).
◊The gas valve is energized allowing gas and air into the burner chamber to be ignited by the hot surface igniter.
◊The Hot Air Burner Control Module (N20) senses at least 1.5 micro amps DC from the flame sensor (P1) at terminal 3 of connector X2 and sends a signal from terminal 2 of connector X1 to terminal 12 of connector X15 on the Control Board (A10)
•The heat circuit will remain energized until the cabinet set temperature is reached as sensed at probe B6.
dWhen the condensate box is heated to 140 degrees F at the B3probe, 120 VAC is sent from terminal 5 of connector X12 to the condenser valve (Y1) until the temperature drops.
eIf the “Crisp and Tasty” mode is selected
•120 VAC is sent from terminal 6 of connector X12 on the Control Board (A10) to the Dehumidification Valve (Y2) to pull the humidity out of the cabinet down the drain.
◊In the light and medium modes (one and two drops in the display) the Y2 valve will be energized until the bypass probe (B5) is satisfied.