Garland MCO-GD-10M, MCO-GS-10M, MCO-GD-10E, MCO-GS-10E service manual Electronic Controls E

ELECTRONIC CONTROLS - “E”

Sequence of Operation (With the Oven Doors Closed)

1.Line Voltage is supplied to the Mode Switch, Door Switch and the Momentary Light Switch.

2.Set Mode Switch to COOK and close the oven doors. Line Voltage is sent from Mode Switch to power up the Controller and to the AUX relay on the controller. With the oven doors closed Line Voltage is sent to the 24 volt transformer.

3.Set desired temperature. The controller’s relays now close.

4.The AUX relay sends Line Voltage to the motor relay coil, closing the circuit to the Hi/Lo Fan Switch. The motor now operational causes the centrifugal switch to close and send the Neutral Voltage to the 24 Volt Transformer.

5.The bake relay completes the circuit from the 24 volt transformer to the ignition module and *ignition occurs, heating the oven.

Below is a simplified power diagram:

COOK	HIGH
O	HEAT
F
F
COOL	LOW
DOWN

- +	- +
START	CANCEL
TIMER	TIMER

TIMER	TEMP
0-12 HOUR	140-500F

	24 Volt			Motor
	Transformer		Centrifugal			Switch
	24 V
		Thermostat
					Ign. Module
Door Sw.

Hi Speed

Motor Relay

Lo Speed

Neutral

AUX

Mode Sw.

COM6000

Light Sw.

8