Middleby Marshall PS528G installation manual Quick Reference Troubleshooting, Symptom

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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 exceeded 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 minutes of startup, and the oven has stopped heating.

Controls may be set incorrectly.

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 incor- rectly.

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.

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Contents Owners operating Page Middleby Marshall IiiTable of Contents Section Description Model IdentificationPS528 Series Oven Specifications Series PS528 Electrical SpecificationsThis Manual Must Be Kept For Future Reference PS528-Series Oven Components Locations II. Component Function Cooling Fan Blank Plates two sizes and an Air Finger F2. Blank PlatesSection Installation InstallationParts List for Series PS528 GAS Oven Installation KIT UnloadingItem no QTY Description Model PS528 Single Oven Dimensions Model PS528 Double Oven Dimensions Model PS528 Triple Oven Dimensions II. Ventilation Guidelines Electric Supply to be Provided by Customer Circuit BreakerIV. Electric Supply for GAS Heated Ovens 11. Junction Connection BoxGAS Supply 16. Gas Burner Assembly Checking the Gas Supply Inlet Pressure Section Installation Section Operation Control FunctionsHeat Switch Door Safety SwitchBlower Switch Temperature ControllerMeasuring Conveyor Speed ConveyorSee Figures 3-4 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 Exterior Maintenance DailyII. Maintenance Monthly Conveyor Belt FigureRemoving Conveyor From Oven For Cleaning QuantitySection Maintenance Air Fingers Disassembly For Cleaning T1 T2 T3 B1 B2 B3Reassembly 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 Remove the outside master links on the right and left Attaching Drive Chain Important Notices III. Maintenance Every 3 MonthsIV. Maintenance Every 6 Months Electrical TerminalsKEY Spare Parts KIT PS528-SERIES GAS Oven KEY Spare Parts KIT FigureSection Troubleshooting Problem Oven does not HeatSection Troubleshooting Section Electrical Schematics
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PS528G specifications

The Middleby Marshall PS528G is a cutting-edge gas-fired conveyor oven, designed to revolutionize the way food is cooked in high-demand commercial kitchen environments. Renowned for its exceptional performance, this oven combines advanced technology with user-friendly features, making it a preferred choice for restaurants, pizzerias, and other food service operations.

One of the standout features of the PS528G is its impressive cooking capacity. With a spacious cooking chamber and a conveyor belt that ensures uniform movement of food items, this oven can handle a variety of menu items all at once. This is particularly beneficial for establishments with high volume requirements, as the efficient design allows for consistent results and quick turnaround times.

The PS528G utilizes advanced jet air technology, which circulates hot air throughout the cooking chamber. This ensures even cooking and browning of food, eliminating cold spots and ensuring that every item comes out perfectly cooked. The enhanced air flow not only improves cooking quality but also reduces the cooking time compared to traditional ovens.

Energy efficiency is another highlight of the Middleby Marshall PS528G. The gas-fired system is engineered to optimize fuel consumption, making it both environmentally friendly and cost-effective. Operators can expect significantly lower energy bills without compromising on cooking performance, making this oven an ideal investment for busy kitchens.

Moreover, the PS528G features a user-friendly digital control panel. This intuitive interface allows operators to easily set cooking temperatures, adjust conveyor speeds, and monitor cooking cycles with precision. The programmable features enable users to save recipes, ensuring consistency across batches and streamlining kitchen operations.

Safety is also a top priority with the PS528G. The oven is equipped with safety features such as a reliable ignition system and temperature controls that prevent overheating, reducing the risk of accidents in busy kitchens.

In conclusion, the Middleby Marshall PS528G is a powerhouse in the realm of commercial cooking. Its combination of high cooking capacity, advanced jet air technology, energy efficiency, user-friendly controls, and safety features make it an essential tool for any food service operation that demands high-quality cooking in a fast-paced environment. As the culinary landscape continues to evolve, the PS528G stands as a testament to innovation and reliability in the kitchen.
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