Manuals / Middleby Marshall / Kitchen Appliance / Oven

Middleby Marshall 60254 Iii. Quick Reference Troubleshooting, Symptom, Problem, Solution, turn On

Models: 60254

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III. QUICK REFERENCE: TROUBLESHOOTING

III. QUICK REFERENCE: TROUBLESHOOTING
SYMPTOM		PROBLEM			SOLUTION

Oven will not	No electrical power			• Check that the circuit breaker/fused disconnect is on. Make
turn On.					sure the emergenct stop button is on.
Oven will not		Faulty contactor		•	Replace contactor.
heat.
		Faulty heater element		•	Replace element.
Oven is operating, but little		Air fingers may be as-		• Turn oven off, and allow to cool. Reassemble fingers correctly.
or no air is coming from		sembled incorrectly after
the fingers.		cleaning.
Conveyor will not move.		Conveyor may be jammed.		• Turn oven off, and allow to cool. Check conveyor for blockage.

SCREEN ALERTS
SYMPTOM		PROBLEM		SOLUTION

High Control Compartment		Clean and replace the front		• Failure to do this will eventually shut down the oven due to
Temperature		fan filters.		excessive temperature.
Main Blower problem		The computer has detected		• This should be corrected by a qualified service technician.
or Combustion Blower		a problem with either the
problem.		main, or burner blowers.
Control Over Temp	Front filters are clogged			• Clean or replace filters.
Front belt jammed	Front belt has stopped			• Remove obstruction, and restart oven.
				• If no obstruction, call service.
Rear Belt jammed	Rear belt has stopped			• Remove obstruction, and restart oven.
				• If no obstruction, call service.
High Temp Error	Thermocouple or			• Call service
	PLC malfunction
Belt off-Oven not	Normal operation until
in temperature	Oven reaches operating
	temperature
Energy Saving Mode 1	Normal operation
Energy saving mode 2	Normal operation
Energy saving Mode 3	Normal operation

21	P/N 60254 September 28, 2012

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Middleby Marshall 60254 Iii. Quick Reference Troubleshooting, Symptom, Problem, Solution, Screen Alerts, turn On, heat

Contents

PS740 Series Electric Ovens OWNERS OPERATING AND INSTALLATION MANUALfor domestic and standard export ovens ModelRETAIN THIS MANUAL FOR FUTURE REFERENCE MIDDLEBY MARSHALL MIDDLEBY MARSHALL INC. OVEN LIMITED WARRANTY Non U.S.ANo Quibble Limited Warranty U.S.A. OnlySECTION 6 - ELECTRICAL WIRING DIAGRAM TABLE OF CONTENTSP/N 60254 September 28 SECTION 3 - OPERATIONI. OVEN USES SECTION 1 - DESCRIPTIONII. OVEN COMPONENTS - see Figure Figure 1-1. Oven ComponentsSERIES PS740 ELECTRICAL SPECIFICATIONS I. OVEN SPECIFICATIONSTable 1-1 Dimensions Table 1-2 General SpecificationsP/N 60254 September 28 SECTION 2 - INSTALLATIONPARTS LIST FOR SERIES PS740 ELECTRIC OVEN INSTALLATION KIT P/N PS740 24″ OVEN INSTALLATION REQUIRED KITS AND EQUIPMENTFigure 2-1A. PS740-Series Electric Oven Installation Parts InstallationPARTS LIST FOR SERIES PS740 ELECTRIC OVEN INSTALLATION KIT P/N PS740 OVEN INSTALLATION REQUIRED KITS AND EQUIPMENTFigure 2-1B. PS740-Series Electric Oven Installation Parts InstallationOption Base with Legs and Top Figure 2-2A. Model PS740 24″ Single OvenP/N 60254 September 28 ITEM NOOption Base with Legs and Top Figure 2-2B. Model PS740 32″ Single OvenP/N 60254 September 28 ITEM NOOption Base with Legs and Top Figure 2-3A. Model PS740 24″ Double OvenP/N 60254 September 28 ITEM NOP/N 60254 September 28 Figure 2-3B. Model PS740 32 Double Oven Option Base with Legs and TopITEM NO DESCRIPTIONOption Base with Outriggers and Top Figure 2-4A. Model PS740 24″ Triple OvenP/N 60254 September 28 ITEM NOOption Base with Outriggers and Top Figure 2-4B. Model PS740 32″ Triple OvenP/N 60254 September 28 ITEM NORESTRICT SERVICE ACCESS LEAD TO INCREASED SERVICE equipment directly to the ovenMOUNTING SUCH EQUIPMENT ON THE OVEN MAY VOID AGENCY CERTIFICATIONS EXPENSES FOR THE OWNERFigure 2-7. Base pad Installation IV. ASSEMBLYFigure 2-6. Leg extension and casters installation Figure 2-8. Top panel installationFigure 2-11. Installing the Restraint Cable Figure 2-10. Top panel installationC. Restraint Cable Installation Figure 2-9. StackingFigure 2-13. Conveyor placement Figure 2-12. Conveyor installationD. Conveyor Installation Figure 2-14. Conveyor Belt tensionSWITCHING PHOTO DETECTOR RESETTING DIRECTION JUMPERE. Final Assembly CONVEYOR BELT REVERSALIII. ELECTRICAL CONNECTION INFORMATION FOR PS740E-SERIES OVENS IV. ELECTRIC SUPPLY FOR ELECTRICALLY HEATED OVENSFigure 2-18. Utility Connection Locations for Elec Figure 2-17. Typical Electric Oven Data PlateELECTRICAL SPECIFICATIONS UTILITY ROUGH-IN DIMENSIONS AND POSITIONING FOR PS740-SERIES OVENSFigure 2-19. Typical PS740-Series Ovens Installation SUPPLY WIREE. Energy Level Indicators B. Conveyor Time SettingSECTION 3 - OPERATION I. LOCATION AND DESCRIPTION OF CONTROLSB. Daily Shutdown Procedure A. Daily Startup ProcedureB. Oven Temperature/Set Point/Indicator Screen II. NORMAL OPERATION - STEP-BY-STEPSYMPTOM III. QUICK REFERENCE TROUBLESHOOTINGPROBLEM SOLUTIONI. MAINTENANCE - DAILY SECTION 4 - MAINTENANCEFigure 4-1. Cooling Vents and Grills P/N 60254 September 28Top Row II. MAINTENANCE - MONTHLYBottom Row Figure 4-2. Removing Air Fingers and PlatesFigure 4-5. Drive shaft configurations III. MAINTENANCE - EVERY 3 MONTHSD. Split Belt Disassembly and Cleaning Figure 4-4. Disassembling the idler shaftFigure 4-7. Rear panel access IV. MAINTENANCE - EVERY 6 MONTHSFigure 4-6. Disassembling the drive shaft P/N 60254 September 28P/N 60254 September 28 Figure 4-8. Key Spare PartsV. KEY SPARE PARTS - Available separately. See Figure ITEM QTYPROBLEM PRODUCTS ARE OVERCOOKED OR UNDERCOOKED SECTION TROUBLESHOOTINGPROBLEM OVEN BLOWER AND CONVEYOR OPERATE YET THE OVEN IS NOT HEATING PROBLEM OVEN DOES NOT HEATMiddleby-Marshall Model Number E208-240 Volt 50/60 Hz, 3 Phase SECTION 6 - WIRING DIAGRAMP/N 60254 September 28 60739 Rev. JP/N 60254 September 28 Middleby-Marshall Model Number E380-480 Volt 50/60 Hz, 3 Phase60741 Rev. L P/N 60254 September 28 P/N 60254 September 28 installing or servicing this equipment