Vulcan-Hart ML-044937, ML-044936, ML-044962, ML-044969 Troubleshooting, Problem, Probable Cause

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TROUBLESHOOTING

TROUBLESHOOTING

Problem

Oven will not hold temperature.

Oven slow to heat.

Oven will not recover.

Product (in oven) not cooking evenly.

Product (in oven) dried out.

Griddle will not hold temperature.

Probable Cause

Thermostat out of calibration.

Bypass flame too high or too low.

Oven door not closing properly.

Low gas pressure.

Wrong orifice.

Vent in pressure regulator blocked.

Oven door not closing properly.

Bypass flame too low. Low gas pressure.

Vent in pressure regulator blocked.

Oven door not closing properly.

Wrong orifice.

Unit not level.

Burner deflector or oven bottom warped.

Door not closing properly.

Product placement improper.

Gas pressure fluctuating.

Temperature too high or too low.

Thermostat out of calibration.

Too long of a baking time.

Thermostat out of calibration.

Bypass flame too high.

Vent in pressure regulator blocked.

Gas pressure fluctuating.

Wrong dial on thermostat.

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Contents IMPORTANT FOR YOUR SAFETY SERVICE AND PARTS MANUALSIGNATURE SERIES VULCAN-HART COMPANY TABLE OF CONTENTS Snorkel Oven and/or Electric Ignition Oven with KX ThermostatINTRODUCTION Service NotesProduct Features and Descriptions Product Features and Descriptions Cont UNCRATING/SETUP INSTALLATION REQUIREMENTSGAS CONNECTIONS GAS PRESSURE REQUIREMENTSInstallation Requirements Cont GAS PRESSURE CHECK PROCEDURES StepsVENTILATION REQUIREMENTS DIAGRAM #2 PILOT ADJUSTMENTSDIAGRAM #1 DIAGRAM #3 DIAGRAM #4BURNER ADJUSTMENTS DIAGRAM #5BATTERY INSTALLATION DIAGRAM #6 DIAGRAM #7 DIAGRAM #8 THERMOSTATS CALIBRATION OF THERMOSTATS DIAGRAM #9DIAGRAM #10 Standard Oven with FDTO ThermostatSnorkel Oven and/or Electric Ignition Oven with KX Thermostat Griddles with BJWA Thermostat DIAGRAM #11 DIAGRAM #12 BYPASS SCREW CALIBRATION SCREWOVEN ELECTRIC IGNITION SYSTEMS Spark SystemDIAGRAM #13 SIGNATURE OVEN W/SPARK PILOTDIAGRAM #14 SIGNATURE CONVECTION OVENW/ELECTRIC IGNITION DIAGRAM #15 SIGNATURE OVEN W/ELECTRIC IGNITIONDIAGRAM #16 BRASS VALVESVALVE DIAGRAM #18 DOORS, DOOR SEALS, HINGES AND COUNTERWEIGHTSDIAGRAM #17 DIAGRAM #19All sizes are rated for sea level BURNERORIFICE, NAT ORIFICE, LPCLEANING PROCEDURES Cleaning Tips SCHEDULED MAINTENANCE Recommended Service FrequencyInspection Items TROUBLESHOOTING ProblemProbable Cause Griddle will not heat evenly Product sticking to griddle TROUBLESHOOTING Gas odor Charbroiler will not heat evenly Repeated component failure Stainless steel turning blue Stainless steel turning brown PARTS Standard BurnersStandard Burner Parts 426745-1KNOB CONTROL Hot Tops/Fry Tops Hot Tops/Fry Tops Parts 426745-1KNOB CONTROL French Top French Top Parts 426745-1KNOB CONTROL Standard Oven Convection OvenOven Parts 788278A 788276PANELControl System Convection Oven Control System Standard Oven Control System Parts List S TYPEBody Parts/Shelves Risers Body Parts/Shelves Risers Parts List 788382A1 788382A2 788382A3 788382ARiser Kit Without Shelf P/N 788266A Riser Kit With Single Shelf P/N 788365A Double Deck Riser Kit Without Shelves P/N 788368A Double Deck Riser Kit With Shelves P/N 788368A FORM 31203 Rev. A March