Garland MCO-GS-10E - Manual (Page 5)

5
Understanding the sequence of operation is necessary in properly trouble-shooting this appliance. In this section the
sequence of operation will be covered first, as well as calibration and operation of components, and basic trouble
shooting techniques for that specific model. Follow each sequence carefully, and get to understand its operation
before moving on to trouble shooting.
MANUAL CONTROLS - "M"
Sequence of Operation (Starting with the oven doors in closed position.)
1.
Turn the Mode Switch to the “Cook” position. This sends line voltage to the timer.
And with the doors closed, line voltage is sent via the door switch to the thermostat
and the Hi/Lo Fan switch.
2.
Select Hi or Lo speed, the motor will now be operational.
3.
Rotate the temperature dial to desired temperature. The thermostat will now call for
heat sending line voltage to the 24 volt transformer. With the motor operating, the
centrifugal switch is closed, completing the neutral circuit to the transformer.
4.
The 24v transformer now sends 24 volts to the ignition module.
5.
The *ignition sequence starts and oven temperature begins to rise.
*See “Ignition Sequence” later in this manual.
Below is a simplified power diagram:
24 Volt
Transformer
Light Sw.
Door Sw. Mode Sw.
Centrif. Sw.
Motor
Thermostat
Ign. Module
Timer
Hi Speed
Lo Speed
Neutral
Hi/Lo Sw.
Hi/Lo Sw.
Line
CALIBRATION OF THERMOSTAT
INSTRUMENTATION
TIMER
COOL
DOWN
COOK
ON
POWER
O
F
F
HIGH
LOW
TEMP