Oakton StableTemp Ovens Manual

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7.0 Maintenance8.0 TroubleshootingNote: Prior to any maintenance or service on this unit, disconnect service cord fromthe electrical supply source.8.1Temperature7.1CleaningClean the oven interior on a regular basis. When washing interior of unit, handlegasket carefully so as not to impair the positive seal. Clean the inside of the chamberthoroughly with a disinfectant that is appropriate for your application. Makesure to rinse the cleaned surface with a damp cloth. DO NOT USE chlorine-basedbleaches or abrasive cleaners, as they will damage the oven chamber. DO NOT USEspray cleaners that might leak through openings and cracks and get on electricalparts or that may contain solvents that will harm coatings.WARNING: Never clean the unit with alcohol or flammable cleaners with theunit connected to the electrical supply. Always disconnect the unit from the electricalservice when cleaning and assure all volatile or flammable cleaners are evaporatedand dry before reattaching the unit to the power supply.7.2StorageIf the unit is to be shut down for an extended period of time, wipe the chamberclean and let dry before closing door to eliminate possibility of contamination. If theunit is to be transported, remove shelving and trays, clasp the door shut and disconnectthe power supply. Please refer to Section 3.3, Lifting / Handling for furtherdirection.No maintenance is required on the electrical components. If oven fails to operate asspecified please review Section 8.0, Troubleshooting, prior to calling customerservice.ProblemTemperature too highChamber temp spikes overset point and then settlesto set pointTemperature too lowUnit will not heat overa temperature that isbelow set pointSolution1) Controller set too high2) Controller failed on – call Customer Service.3) Wiring error – call Customer Service.Recalibrate1) Thermostat set too low2) Controller set too low3) Unit not recovered from door opening – waitfor heating indicator to turn off4) Unit not recovered from power failure or beingturned off – oven will need 1 hour to warmup and stabilize5) Element failure – see if heating indicator is on;compare current draw to data plate6) Controller failure – confirm with front panel lightthat controller is calling for heat7) Thermostat failure – confirm with front panellight that it is operating correctly8) Wiring problem – check all functions andcompare wiring to schematic in section 11.0 -especially around any areas recently worked on9) Loose connection – call customer service1) Confirm that amperage and voltage matchdata plate.2) Confirm that set point is set high enough–turnThermostat all the way clockwise and see ifheating light or safety light comes on3) Check connections to sensor4) Check calibration – using independentthermometer, follow instructions in section 6.210 11
ProblemUnit will not heat up at allChamber temperatureunstable; will not maintainset pointSolution1) Verify that controller is asking for heat by lookingfor heating indicator light – if pilot light is noton continuously at initial start up, there is aproblem with the controller2) Check amperage – amperage should be virtuallyat maximum rated (data plate) amperage3) Is the Thermostat set high enough? – fordiagnostics, should be fully clockwise with thepilot light never on4) Has the fuse/circuit breaker blown?1) Is ambient room temperature radically changing– either door opening or room airflow fromheaters or air conditioning ? – stabilizeambient conditions.2) It may happen if exhaust stack is 100% open –close exhaust stack.3) Calibration sensitivity – call Customer Service4) Thermostat set too low – be sure that it is morethan five degrees over desired set point; checkif pilot is on continuously; turn controller knobcompletely clockwise to see if problem solvedthen follow instructions in section 6.2 forcorrect setting.5) Assure that set point is at least 5 degrees overambient room temperature.6) See if ambient is fluctuating7) Verify that reference thermometer is certified.8.2MechanicalProblemDoor not sealing8.3OtherSolution1) Confirm that the door gasket is clean of debrisand aligned properly.2) Confirm that unit has not been damaged andthat the body is square.ProblemSolutionUnit or wall fuse/1) Check wall power source.circuit breaker is blown 2) Compare current draw and compare to specson data plate.3) See what other loads are on the wall circuit.Unit will not turn on 1) Check wall power source.2) Check fuse circuit breaker on unit or in wall.3) Check all wiring connections,esp. around the on/off switch.Unit is smoking –Put unit under vent and run at full power forout of boxone hourContamination 1) See Cleaning procedure, section 3.5in chamber2) Develop and follow a standard operatingprocedure for specific application; includedefinition of cleaning technique andmaintenance schedule12 13
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Oakton StableTemp Ovens Manual

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