Middleby Marshall PS520G 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

overcooked or undercooked.

PROBLEM

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

Electrical power may not be reaching the oven, or the controls may be set incor- rectly.

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 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 reassem- bling 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 IdentificationSeries PS520 Electrical Specifications PS520 Series Oven SpecificationsThis Manual Must Be Kept For Future Reference PS520-Series Oven Components Locations II. Component Function Cooling Fan Blank Plates two sizes and an Air Finger F2. Blank PlatesSection Installation Parts List for Series PS520 GAS Oven Installation KIT UnloadingParts List for Series PS520 Gas Oven Model PS520 Single Oven Dimensions Model PS520 Double Oven Dimensions Model 520 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 13 Gas Control Valve Section Operation Control FunctionsDoor Safety Switch Blower SwitchHeat Switch Temperature ControllerConveyor Measuring Conveyor SpeedSee Figures 3-4 Startup Procedures Daily Startup Power FailureShutdown Procedure III. STEP-BY-STEP OperationControl Panel Daily Startup Procedure IV. Normal Operation STEP-BY-STEPSP Lock Quick Reference Troubleshooting SymptomSection Maintenance Maintenance Daily ExteriorCooling Fan Conveyor Belt FigureII. Maintenance Monthly Removing Conveyor From Oven For CleaningSection 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 Section Maintenance Reinstall End Plugs Conveyor Reassembly Into Oven Checking Conveyor Belt TensionConveyor Belt Link Removal Attaching Drive Chain III. Maintenance Every 3 Months IV. Maintenance Every 6 MonthsImportant Notices Electrical TerminalsKEY Spare Parts KIT PS520-SERIES GAS Oven KEY Spare Parts KIT FigureSection Troubleshooting Section Troubleshooting Schematics Section Section Electrical Schematics Section Electrical Schematics

PS520G specifications

The Middleby Marshall PS520G represents a significant leap forward in the world of commercial cooking equipment, specifically designed to meet the demands of high-volume foodservice operations. This innovative conveyor oven is engineered for efficiency, speed, and high-quality results, making it a favorite among pizza parlors, restaurants, and fast-food businesses.

One of the standout features of the PS520G is its gas-powered operation. The use of natural gas or propane not only enhances cooking speed but also contributes to lower operational costs when compared to electric models. This advantage allows establishments to serve more customers in less time, thereby maximizing revenue.

The PS520G is equipped with advanced technology that ensures consistent cooking results. Its patented Air Impingement technology circulates heated air within the cooking chamber, ensuring that every item receives even heat distribution. This technology is particularly beneficial for achieving perfectly cooked pizzas, breads, and other baked goods. The ability to cook food quickly while maintaining moisture and flavor is a hallmark of this model.

Another significant characteristic of the PS520G is its versatile cooking capabilities. The unit features adjustable conveyor speed, allowing operators to customize cooking times according to the type of food being prepared. This flexibility is essential in a bustling kitchen environment where different menu items require distinct cooking times.

The construction of the PS520G is robust and designed for durability, with stainless steel exteriors that are not only attractive but also easy to clean. Additionally, the oven's efficient design includes a high-capacity cooking chamber that can accommodate larger items, making it suitable for various food types.

A critical aspect of any commercial kitchen equipment is ease of use, and the PS520G shines in this area as well. The user-friendly digital controls allow for precise temperature settings and monitoring, enabling kitchen staff to maintain high standards in cooking. Moreover, the self-cleaning feature simplifies maintenance, ensuring the oven operates at peak performance with minimal downtime.

In summary, the Middleby Marshall PS520G conveyor oven embodies a perfect blend of technology, efficiency, and versatility. Its gas-powered operation, advanced cooking technologies, and durable construction make it an indispensable asset for any high-volume foodservice operation, driving both productivity and quality in food preparation. With the PS520G, businesses can ensure they are well-equipped to meet the culinary demands of their customers, providing fast and delicious meals consistently.
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