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.

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Middleby Marshall PS540G installation manual IV. Quick Reference Troubleshooting, Symptom
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PS540G specifications

The Middleby Marshall PS540G is a cutting-edge conveyor oven designed to meet the diverse cooking needs of commercial kitchens and food service operations. Known for its efficiency and reliability, the PS540G combines advanced technology with innovative design to deliver consistent cooking results while optimizing energy use.

One of the standout features of the PS540G is its high-efficiency impingement cooking system. This technology utilizes powerful jets of hot air that quickly and evenly circulate around the food, ensuring thorough cooking while significantly reducing cooking times. This results in faster service and improved throughput, making it an excellent choice for busy restaurants, cafes, and catering operations.

The oven is equipped with a unique dual-fuel option, allowing operators to choose between natural gas or propane. This flexibility helps businesses adapt to their specific requirements and preferences, providing both cost and energy-saving benefits. Additionally, the PS540G is designed with a fully insulated structure, minimizing heat loss and further enhancing energy efficiency.

Another key characteristic of the Middleby Marshall PS540G is its user-friendly control interface. The digital controls offer precise temperature settings and adjustable conveyor speeds, allowing chefs to customize the cooking process for various food items. This versatility ensures optimal results, whether baking pizzas, roasting vegetables, or toasting sandwiches.

The spacious cooking chamber of the PS540G is designed with a wide conveyor belt that accommodates large batches of food, making it particularly suitable for high-volume establishments. The oven's compact footprint allows it to fit into tight kitchen spaces without sacrificing cooking capacity.

Safety is also a priority in the design of the PS540G. The oven features automatic shut-off mechanisms and cool-to-the-touch exterior surfaces, allowing for safer operations. Additionally, the durable construction with stainless steel components ensures longevity and ease of maintenance.

In conclusion, the Middleby Marshall PS540G is a state-of-the-art conveyor oven that offers outstanding performance for commercial kitchens. With its advanced impingement cooking technology, flexible dual-fuel options, user-friendly controls, and robust safety features, the PS540G stands out as an essential tool for any food service operation looking to enhance efficiency and food quality.
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