Middleby Marshall PS528E III. Maintenance Every 3 Months, IV. Maintenance Every 6 Months

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4. Reattach conveyor guard to control panel and secure two screws.

Install both upper end plugs.

Figure 4-34.

III. MAINTENANCE - EVERY 3 MONTHS

WARNING

Shut OFF all electrical power and lock/tag out the switch before attempting maintenance work.

NOTE:It is recommended that the 3-month maintenance be performed by an authorized Middleby Marshall technician.

SECTION 4

MAINTENANCE

A. Electrical Terminals

Open the control cabinet door by removing the three screws from the control cabinet door. Tighten all electrical control terminal screws including the electrical contactor terminal screws as shown in Figure 4-35.

Figure 4-35.

B. Ventilation

Check that the air circulation throughout the oven is not blocked and is working properly.

IV. MAINTENANCE - EVERY 6 MONTHS

A. Check brushes on D.C. conveyor motor, when worn to less than 1/10″ (2.4mm), replace the brushes.

B. Check your oven venting system.

IMPORTANT NOTICES:

• Installation of replacement parts requiring access to the interior of the oven is permitted only by an authorized service technician.

• If there are any problems with the operation of the oven, the authorized service technician must be called.

• It is suggested to obtain a service contract with a manufacturer’s authorized service technician.

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Contents Owners operating Page Middleby Marshall Table of Contents Model Identification Section DescriptionPS528 Series Oven Specifications Series PS1828 Electrical SpecificationsThis Manual Must Be Kept For Future Reference PS528-Series Oven Components Locations II. Component Function Cooling Fan F2. Blank Plates Unloading Section InstallationSingle and Double Stack Ovens Parts List for Series PS528 Electric Oven Installation KITModel PS528 Single Oven Dimensions Model PS528 Double Oven Dimensions Model 528 Triple Oven Dimensions Electric Supply to be Provided by Customer Circuit Breaker II. Ventilation Guidelines10. Typical Electric Oven Data Plate IV. Electric Supply for Electrically Heated OvensSection Installation Control Functions Section OperationTemperature Controller Door Safety SwitchBlower Switch Heat SwitchMeasuring Conveyor Speed ConveyorSee Figures 3-4 III. STEP-BY-STEP Operation Startup Procedures Daily StartupPower Failure Shutdown ProcedureControl Panel IV. Normal Operation STEP-BY-STEP Daily Startup ProcedureSP Lock Symptom Quick Reference TroubleshootingSection Maintenance Conveyor Belt Figure Maintenance DailyExterior Cooling FanII. Maintenance Monthly Removing Conveyor From Oven For CleaningQuantity Air Fingers Disassembly For Cleaning T1 T2 T3 B1 B2 B3 12. Standard Lower Finger Reassembly of Air FingersExtended Lip Tab on Outer Plate Flange Finger Manifold Incorrect Too Reinstall End Plugs Checking Conveyor Belt Tension Conveyor Reassembly Into OvenConveyor Belt Link Removal Attaching Drive Chain Electrical Terminals III. Maintenance Every 3 MonthsIV. Maintenance Every 6 Months Important NoticesPS528-SERIES Electric Oven KEY Spare Parts KIT Figure KEY Spare Parts KITProblem Oven does not Heat Section TroubleshootingSection 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