Garland MCO-GS-10M, MCO-GD-10M Manual Controls M, Calibration of Thermostat, Instrumentation

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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.

COOK

POWER

HIGH

 

 

O

ON

 

 

 

F

 

 

F

 

 

COOL

 

LOW

DOWN

TIMER

 

 

 

TEMP

5.The *ignition sequence starts and oven temperature begins to rise. *See “Ignition Sequence” later in this manual.

Below is a simplified power diagram:

Line

Hi/Lo Sw.

 

 

 

 

 

 

 

 

 

 

Hi Speed

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Hi/Lo Sw.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Lo Speed

 

 

 

 

Door Sw. Mode Sw.

 

 

 

 

 

 

 

Neutral

 

 

 

 

 

 

 

 

 

 

Timer

 

 

 

 

 

 

 

 

 

 

 

 

 

24 Volt

Motor

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Transformer Centrif.

Sw.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Thermostat

Light Sw.

Ign. Module

CALIBRATION OF THERMOSTAT

￿INSTRUMENTATION

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Contents Garland Direct ON-SITE Service 1-800-451-1165 General Information Overview of Operational Sequences Table of Contents Specification & Dimensions Common Wire Diagrams Component Access of Functional ComponentsDimensions & Specifications GAS Convection Oven GAS Specifications Main Pilot TotalPilot Orifice PRES. W/C AMT Orifice NAT PROInstrumentation Manual Controls MCalibration of Thermostat Weighting Calibration Notes Thermostat OperationElectronic Controls E Robertshaw COM6000 Controller Electronic Control Failure CodesTemp Operation of the Timer Function Operation of the Temperature FunctionOperation of the Pulse Function User Preference Offset for the Electronic ControllersTo SET Hold Temperature Timer Resolution ChangingTo SET Oven Into Pulse Mode Change the HertzSecond Stage Main Burner Operation Safety Lockout TimeChain Programming END Start StageTroubleshooting Ends S86 Checkout YES Spark Stops When Pilot is LIT?Start YES Spark Across IGNITOR/SENSOR GAPCheck Spark Ignition Circuit Check GroundingControl Module Flame Sensor Circuit Examples of Unsatisfactory Pilot FlamesAppearance Cause Top Front Center Component LocationsRight Front Lower FrontFile Name To Remove Doors from the OvenDisassembly of the Left Door To Reinstall Doors onto Convection OvenInstalling and Adjusting Door Chain Disassembly of the Right Door w/o window Page Convection Oven Motor To Replace or Adjust Door Latch MechanismTo Replace Convection Oven Motor Assembly Drawing Below Assembly Page Common Wire Diagrams Page
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