Middleby Marshall PS540 installation manual IV. Quick Reference Troubleshooting, Symptom

Page 34

SECTION 3

OPERATION

IV. QUICK REFERENCE: TROUBLESHOOTING

SYMPTOM

light is lit, food product is

undercooked

Oven will not turn on at all

Oven shuts down shortly

after it is turned on

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 gas burner did not light within 90 seconds of turn-

ing the "HEAT" () Switch to the “ON” ("I") position. This automatically en - gages a safety lockout mode.

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. The burner cannot engage until the blowers are in operation.

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.

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

appears in display, oven is not heating

Oven will not heat

Controls may be set incor-

 

rectly.

Oven is operating, but

Air fingers may have been

little or no air is blowing

reassembled incorrectly

 

 

 

 

from air fingers

after cleaning.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Conveyor moves with a

Conveyor may be jammed

jerky motion, or will not

on an object in the oven, or

 

 

 

 

 

 

move at all

conveyor belt or drive chain

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

tension may be incorrect.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Food products are

Controls may be set incor-

 

 

 

 

overcooked or

rectly.

 

 

 

 

undercooked.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

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.

30

Image 34
Contents Owners operating Page Middleby Marshall IiiTable of Contents Section Description Model IdentificationPS540 Series Oven Specifications II. Principle of AIR Flow Heat Transfer and How It WorksII. Principle of AIR Flow Air FingersPS540-Series Oven Components Locations III. Component Function FigureBlower Fan III. Component FunctionConveyor Motor and Conveyor Belt Gas BurnerCooling Fan Cooling Fan See FigureAir Fingers and Blank Plates See Figure F1. Air Fingers F2. Blank PlatesSection Installation UnloadingPS540 Oven Installation Required Kits and Equipment Parts List for Series PS540 GAS Oven Installation KITModel PS540 Single Oven Option Base with Legs and Top Model PS540 Double Oven Option Base with Legs and Top Model PS540 Triple Oven Option Base with Outriggers and Top Model PS540 Single Oven Dimensions Model PS540 Double Oven Dimensions Restraint Cable Installation Model Triple Oven DimensionsSection Installation II. Ventilation Guidelines Ventilation Hood 10. Vent HoodIV. Electric Supply for GAS- Heated Ovens 11. Typical Gas Oven Data PlateGAS Supply for GAS Heated Ovens 12. Junction Connection BoxVI. Conveyor Rear Stop and END Stop Installation Section Installation Section Operation Control FunctionsHeat Switch Door Safety SwitchBlower Switch Temperature ControllerConveyor Measuring Conveyor SpeedSee Figures 3-4 III. STEP-BY-STEP Operation Control Panel Daily Startup Procedure II. Normal Operation STEP-BY-STEPSP Lock IV. Quick Reference Troubleshooting SymptomSection Maintenance Cooling Fan Maintenance DailyExterior Crumb Pans FigureII. Maintenance Monthly Removing Conveyor From Oven For CleaningSection Maintenance Air Fingers Disassembly For Cleaning Standard FingersCleaning the Window Reassembly of Air FingersExtended 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 Replacing Conveyor BeltLower End Plug III. Maintenance Every 3 Months Cleaning the Blower/Fan MotorVentilation Electrical TerminalsChecking the Blower/Fan Belt Split-belt Conveyor Shaft Cleaning Blower Fan Shaft Bearing LubricationSection Maintenance IV. Maintenance Every 6 Months Important NoticesKEY Spare Parts KIT PS540-SERIES GAS Oven KEY Spare Parts KIT, p/n 36805 FigureSection Troubleshooting Section Troubleshooting Parts List English Oven PANELS, Window and Legs NUT, 3/8″-16 Nylon Insulated L/N ZCSection Parts List Control Panel English Blower and Shroud English Conveyor English Split Belt Conveyor English GAS Burner and Piping Assembly English Machinery Compartment Section Parts List Section Electrical Schematics Section Electrical Schematics Section Electrical Schematics Section Electrical Schematics Page Hour Service Hotline

PS540 specifications

The Middleby Marshall PS540 is a state-of-the-art conveyor pizza oven that has garnered significant attention in the commercial kitchen world due to its advanced features and capabilities. This oven is designed to meet the high-volume demands of pizzerias, restaurants, and food service establishments, offering efficiency without sacrificing quality.

One of the standout features of the PS540 is its innovative air impingement technology. This system utilizes powerful jets of hot air that circulate around the pizza, ensuring even cooking and browning. The result is a perfectly cooked pizza with a crispy crust and melting cheese, all while reducing cooking times significantly compared to traditional ovens. The efficiency of the PS540 allows operators to increase output, making it a valuable asset during peak hours.

Another key characteristic of the PS540 is its adjustable conveyor speed, which enables operators to customize cooking times based on the specific menu items being prepared. This flexibility ensures that various pizzas, from thick crust to thin crust, can be cooked to perfection. The conveyor design also facilitates a seamless workflow in busy kitchens, allowing for easy loading and unloading of pizzas.

In addition to its cooking capabilities, the PS540 boasts a user-friendly control panel, featuring intuitive digital controls for temperature and cooking times. This user-focused design simplifies operation, allowing staff members to easily program the oven for consistent results. Furthermore, the oven's durable construction and high-quality materials ensure reliability and longevity, minimizing maintenance needs and downtime.

Energy efficiency is a critical consideration in commercial kitchens, and the Middleby Marshall PS540 stands out in this area as well. By optimizing airflow and heat transfer, the oven reduces energy consumption while maintaining exceptional performance. This not only contributes to lowering operational costs but also aligns with sustainability efforts in food service.

Safety features, such as cool-touch exteriors and integrated ventilation systems, further enhance the PS540's appeal, ensuring that it meets the rigorous standards required in commercial kitchens. Overall, the Middleby Marshall PS540 not only elevates pizza quality but also enhances operational efficiency, making it an indispensable tool for any high-volume restaurant or pizza establishment. With its blend of technology, performance, and ease of use, the PS540 sets a new standard for conveyor pizza ovens in the culinary landscape.