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This service manual is designed to answer questions related to model operational requirements,
troubleshooting and disassembly/assembly procedures. It contains electronic ignition operation, trouble-
shooting and electronic control operations that include diagnostic codes, ladder diagrams, wire diagrams and
troubleshooting. It also includes BTU ratings, orifice size and gas pressure technical data for each model.
For example; if you need to know information on manual controls (manual controls - controls the oven with hydraulic
thermostat, electric mechanical timer.) refer to SECTION 2: OVERVIEW OF OPERATIONAL SEQUENCES,
Sequence of Operation. This book is broken down into sections, each section will list the applicable topics. Use the
Table of Contents to locate the topic and function that you are attempting to trouble-shoot.
Table of Contents
SECTION 1: SPECIFICATION & DIMENSIONS ............................................................................3
GAS CONVECTION OVEN "GAS SPECIFICATIONS”...............................................................................................4
DIMENSIONS & SPECIFICATIONS ............................................................................................................................4
SECTION 2: OVERVIEW OF OPERATIONAL SEQUENCES .......................................................4
MANUAL CONTROLS - "M” .......................................................................................................................................5
Sequence of Operation.............................................................................................................................................5
Manual Ladder Diagram ...........................................................................................................................................5
CALIBRATION OF THERMOSTAT .............................................................................................................................5
Instrumentation.........................................................................................................................................................5
Weighting..................................................................................................................................................................6
Thermostat Operation...............................................................................................................................................7
ELECTRONIC CONTROLS - “E”................................................................................................................................8
Sequence of Operation (With the Oven Doors Closed) ...........................................................................................8
Electonic Ladder Wire Diagram................................................................................................................................8
ELECTRONIC CONTROL FAILURE CODES .............................................................................................................9
CHART FOR INTERNAL OVEN TEMPERATURE SENSOR......................................................................................9
ROBERTSHAW COM6000 CONTROLLER................................................................................................................9
USER PREFERENCE OFFSET FOR THE ELECTRONIC CONTROLLERS ...........................................................10
COM6000 UPO MODE...........................................................................................................................................11
COM6700 UPO MODE...........................................................................................................................................11
ELECTRONIC PILOT & MAIN BURNER IGNITION SEQUENCE ............................................................................12
FIRST STAGE - TRIAL FOR PILOT IGNITION .....................................................................................................12
SECOND STAGE - MAIN BURNER OPERATION ................................................................................................12
SAFETY LOCKOUT TIME......................................................................................................................................12
SERVICE ....................................................................................................................................................................13
PRELIMINARY CHECK..........................................................................................................................................13
SYSTEM TROUBLE SHOOTING...........................................................................................................................13
S86 CHECKOUT AND TROUBLE SHOOTING .....................................................................................................14
CHECK SPARK IGNITION CIRCUIT .....................................................................................................................15
CONTROL MODULE FLAME SENSOR CIRCUIT.................................................................................................15