Middleby Marshall PS528 (Triple), PS528E Section Troubleshooting, Problem Oven does not Heat

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SECTION 5

TROUBLESHOOTING

SECTION 5

TROUBLESHOOTING

PROBLEM:

PRODUCTS ARE OVERCOOKED

OR UNDERCOOKED

PROBLEM:

OVEN BLOWER AND CONVEYOR OPERATE,

YET THE OVEN IS NOT HEATING

Check for correct setting of conveyor speed control.

Set the conveyor speed control at correct setting.

Check for correct

setting on tempera-

ture controller.

Turn temperature control to correct setting.

Reset the temperature controller to a new setting (above 200°F), after turning the BLOWER switch to off for 30 seconds.

Start the oven again. If the oven still does not heat, call your Middleby Marshall Service Agency.

Verify the food

preparation process.

If products still cook incorrectly,

call your Middleby Marshall

Service Agency.

PROBLEM:

OVEN DOES NOT HEAT

Check to see if both BLOWER switch and HEAT switch are in the “ON” or “I” position.

If oven does not heat, call your

Middleby Marshall Service Agency.

PROBLEM:

CONVEYOR WILL NOT HOLD PROPER SPEED

OR WILL NOT RUN AT ALL

Check whether the conveyor is jammed on something in oven.

Check for proper tension of conveyor drive chain and conveyor belt. Refer to Section 4 for correct procedure.

Check that the conveyor

drive sprocket is tight.

If conveyor still does not run correctly, contact

your Middleby Marshall Service Agency.

PROBLEM:

BLOWER MOTOR IS RUNNING, YET LITTLE OR NO AIR BLOWS FROM AIR FINGERS

Air fingers reassembled incorrectly,

after cleaning.

Assemble air fingers correctly, after cleaning. Refer to Section 4 procedure, or call your Middleby Marshall Service Agency.

PROBLEM:

OVEN DOES NOT TURN ON WHEN ITS

SWITCHES ARE TURNED ON

Check that all electric supply switches are set to the “ON” or “I” position. Then, start the oven.

If oven still will not start, contact your Middleby

Marshall Service Agency.

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Contents Owners operating Page Middleby Marshall Table of Contents Model Identification Section DescriptionThis Manual Must Be Kept For Future Reference PS528 Series Oven SpecificationsSeries PS1828 Electrical Specifications PS528-Series Oven Components Locations II. Component Function Cooling Fan F2. Blank Plates Unloading Section InstallationSingle and Double Stack Ovens Parts List for Series PS528 Electric Oven Installation KITModel PS528 Single Oven Dimensions Model PS528 Double Oven Dimensions Model 528 Triple Oven Dimensions Electric Supply to be Provided by Customer Circuit Breaker II. Ventilation Guidelines10. Typical Electric Oven Data Plate IV. Electric Supply for Electrically Heated OvensSection Installation Control Functions Section OperationBlower Switch Door Safety SwitchHeat Switch Temperature ControllerSee Figures 3-4 Measuring Conveyor SpeedConveyor Power Failure Startup Procedures Daily StartupShutdown Procedure III. STEP-BY-STEP OperationControl Panel IV. Normal Operation STEP-BY-STEP Daily Startup ProcedureSP Lock Symptom Quick Reference TroubleshootingSection Maintenance Exterior Maintenance DailyCooling Fan Conveyor Belt FigureQuantity II. Maintenance MonthlyRemoving Conveyor From Oven For Cleaning Air Fingers Disassembly For Cleaning T1 T2 T3 B1 B2 B3 12. Standard Lower Finger Reassembly of Air FingersExtended Lip Tab on Outer Plate Flange Finger Manifold Incorrect Too Reinstall End Plugs Checking Conveyor Belt Tension Conveyor Reassembly Into OvenConveyor Belt Link Removal Attaching Drive Chain IV. Maintenance Every 6 Months III. Maintenance Every 3 MonthsImportant Notices Electrical TerminalsPS528-SERIES Electric Oven KEY Spare Parts KIT Figure KEY Spare Parts KITProblem Oven does not Heat Section TroubleshootingSection Troubleshooting Parts List English Single Oven Exploded View English Relay Panel English Blower Assembly English Control Panel English Single Conveyor Section Parts List Section Electrical Schematics Wiring Diagram, E208-240V 50/60/3, PS528 P/N 62309 REV B Wiring Diagram, E380-480V 50/60/3, PS528 P/N 62310 REV B Wiring Diagram, E380V 50/60/3 CE PS528 P/N 63969 REV B Section Electrical Schematics