Panasonic NN­GS595A - 2.4 Oven Temperature Control; 2.5 Combination Cook Control; 2.6 IR Reheat and Operation

10/24/2016 XMLServiceManual
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2.Whencookingtimeinthedisplaywindowhaselapsed,theoventurnsoffautomaticallybyacontrolsignalfromthe
digitalprogrammercircuit.
2.4Oven
ThedigitalprogrammercircuitcontrolstheONOFFtimeoftheheaterinordertocontrolovencavitytemperature.
1.Afterselectingdesiredovencavitytemperatureandpressing[Start]pad,ahighlevelsignalcomesoutmicrocomputer
andappliestopowerrelays,RY4andRY5.
2.WhenRY4&RY5switchtoON,powersourcevoltageisappliedtotheupperandlowerheaters,andtheheatersturn
on.
3.Thedigitalprogrammercircuitsensestheovencavitytemperaturethroughoventempsensor(thermistor).Whenthe
oventemperaturereachesthesettemperature,DPCstopssupplyinghighlevelsignaltothepowerrelays,andthe
heatersturnoff.
4.Aftertheupperandlowerheatersturnoff,theoventemperaturewillcontinueincreasingforawhileandthendecrease
asshowninFigure.
Whentheoventemperaturedropsbelowthesettemperature,thedigitalprogrammercircuitsensesthesignaland
startssupplyingahighlevelsignaltopowerrelaysagain.
2.5Combinationcookcontrol
Combinationcookingisaccomplishedbymicrowaveandgrillcooking(upperheater)beingdonesynchronouslyduringone
combinationcookingcycle.Onecombinationcookingcycleis33seconds.
1.Duringcombinationcooking,thedigitalprogrammercircuitcontrolspowerrelayRY4&RY5ʼsONOFFtime.Inallthree
combinationcookingcategories,powerrelayRY1alwaysstayon,butRY5ʼsONOFFtimeasshowninFigure.
COMBINATION
CATEGORY
GRILL(RY5)
MICROWAVE(RY1)
ON(sec.) OFF(sec.)
COMBINATION
CATEGORY
GRILL(RY5)
MICROWAVE(RY1)
ON(sec.) OFF(sec.)
1 33 0 ON
2 24 9 ON
3 18 15 ON
2.6IRreheat
Thetemperatureoffoodbeingheatedisdetectedbyaninfrared(IR)sensorandyoudonothavetosettime.
2.6.1HowtoreadtemperaturebyIRsensor
IRsensorcanreadfoodtemperaturewithouttouching,IRraysareemittedfromfood.IRsensoristogeneratetemperaturerelated
electricsignaloutputandmicrocomputeristoconvertactualtemperature.