Middleby Marshall PS740E Installation Manual download pdf (Page 25)

21 P/N60254September28,2012

III. QUICK REFERENCE: TROUBLESHOOTING

SYMPTOM PROBLEM SOLUTION

Noelectricalpower • Checkthatthecircuitbreaker/fuseddisconnectison.Make

suretheemergenctstopbuttonison.

Oven will not

turn On.

Faulty contactor

Faulty heater element

• Replace contactor.

• Replace element.

Oven will not

heat.

Air fingers may be as-

sembled incorrectly after

cleaning.

• Turnovenoff,andallowtocool.Reassemblengerscorrectly.

Oven is operating, but little

or no air is coming from

the ngers.

Conveyormaybejammed. • Turnovenoff,andallowtocool.Checkconveyorforblockage.

Conveyor will not move.

SYMPTOM PROBLEM SOLUTION

Clean and replace the front

fan lters.

• Failuretodothiswilleventuallyshutdowntheovendueto

excessivetemperature.

High Control Compartment

Temperature

The computer has detected

a problem with either the

main, or burner blowers.

• Thisshouldbecorrectedbyaqualiedservicetechnician.

MainBlowerproblem

orCombustionBlower

problem.

SCREEN ALERTS

 ControlOverTemp Frontltersareclogged • Cleanorreplacelters.



 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

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Middleby Marshall PS740E Installation Manual Page 25

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