Middleby Marshall PS528 (Triple), PS528E, PS528 (Double) Quick Reference Troubleshooting, Symptom

Page 26

SECTION 3

OPERATION

V. QUICK REFERENCE: TROUBLESHOOTING

SYMPTOM

light is lit, food product is

undercooked

Oven will not turn on at all

appears in display, oven is not heating

Oven will not heat

Oven is operating, but little or no air is blowing from air fingers

Conveyor moves with a jerky motion, or will not move at all

Food products are over- cooked or undercooked.

PROBLEM

The oven temperature ex- ceeded 650°F (343°C), and the burner was automatically shut down.

Electrical power may not be reaching the oven, or the controls may be set incorrectly.

The oven did not reach 200°F (93°C) within 15 min- utes of startup, and the oven has stopped heating.

Controls may be set incor- rectly.

Air fingers may have been reassembled incorrectly after cleaning.

Conveyor may be jammed on an object in the oven, or conveyor belt or drive chain tension may be incorrect.

Controls may be set incorrectly.

SOLUTION

Follow the procedures under Daily Shutdown Procedures in this section to shut down the oven. Contact your Middleby Marshall Authorized Service Agent to determine and correct the cause of the condition to prevent damage to the oven.

Check that the circuit breaker/fused disconnect is turned on.

Check that the "BLOWER" () Switch is in the “ON” ("I") position.

Turn the "HEAT" (), "BLOWER" (), and "CONVEYOR" ()switches to the "OFF" ("O") position.

Wait for AT LEAST FIVE MINUTES before restarting the oven.

Repeat the Daily Startup procedure.

Check that the Set Point is correctly set.

Check that both the "BLOWER" () and "HEAT" () Switches are in the “ON” ("I") position.

If the oven still will not heat,turn the "HEAT" (), "BLOWER" (), and "CONVEYOR" ()switches to the "OFF" ("O") position.

Wait for AT LEAST FIVE MINUTES before restarting the oven.

Repeat the Daily Startup procedure. Check that the Set Point is above 200°F (93°C).

Turn the oven to the “OFF” or “O” position, and allow it to cool.

Disconnect electrical power to the oven.

Refer to Section 4, Maintenance, for instructions on reassembling the air fingers.

Turn the oven to the “OFF” or “O” position, and allow it to cool.

Disconnect electrical power to the oven.

Check if the conveyor is blocked by an object inside the oven.

Refer to Section 4, Maintenance, for instructions on checking the conveyor and drive chain tension.

Check that the set temperature and bake time settings are correct.

IF THESE STEPS FAIL TO RESOLVE THE PROBLEM, CONTACT YOUR LOCAL MIDDLEBY MARSHALL AUTHORIZED SERVICE AGENT. A SERVICE AGENCY DIRECTORY IS SUPPLIED WITH YOUR OVEN.

22

Image 26
Contents Owners operating Page Middleby Marshall Table of Contents Section Description Model IdentificationThis 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 Section Installation UnloadingParts List for Series PS528 Electric Oven Installation KIT Single and Double Stack OvensModel PS528 Single Oven Dimensions Model PS528 Double Oven Dimensions Model 528 Triple Oven Dimensions II. Ventilation Guidelines Electric Supply to be Provided by Customer Circuit BreakerIV. Electric Supply for Electrically Heated Ovens 10. Typical Electric Oven Data PlateSection Installation Section Operation Control FunctionsHeat Switch Door Safety SwitchBlower Switch Temperature ControllerSee Figures 3-4 Measuring Conveyor SpeedConveyor Shutdown Procedure Startup Procedures Daily StartupPower Failure III. STEP-BY-STEP OperationControl Panel Daily Startup Procedure IV. Normal Operation STEP-BY-STEPSP Lock Quick Reference Troubleshooting SymptomSection Maintenance Cooling Fan Maintenance DailyExterior Conveyor Belt FigureQuantity II. Maintenance MonthlyRemoving Conveyor From Oven For Cleaning Air Fingers Disassembly For Cleaning T1 T2 T3 B1 B2 B3 Reassembly of Air Fingers 12. Standard Lower FingerExtended Lip Tab on Outer Plate Flange Finger Manifold Incorrect Too Reinstall End Plugs Conveyor Reassembly Into Oven Checking Conveyor Belt TensionConveyor Belt Link Removal Attaching Drive Chain Important Notices III. Maintenance Every 3 MonthsIV. Maintenance Every 6 Months Electrical TerminalsKEY Spare Parts KIT PS528-SERIES Electric Oven KEY Spare Parts KIT FigureSection Troubleshooting Problem Oven does not HeatSection 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