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35
11. Troubleshooting (not electronic models)
11-1ElectricalMalfunction
NOTE
:
Interlockmonitorswitchmustbereplacedwhenthefuseisblownout.
Parts Cause Diagnosis Remedy
Fuseblows
outwhen
dooris
opened.
Defectiveprimary
interlockswitch
arywinding.
Checkcontinuityoftheprimaryswitchterminals
withwireremovedusingamultimeter.Ifthereis
continuityinterbetweenswitchterminalswhendoor
isopened,theswitchisdefective.
Replacetheprimary
interlockswitch
Defectiveinterlock
monitorswitch
Checkcontinuityofthemonitorswitchterminals
withwireremovedbyusingamultimeter.
Ifthereiscontinuitybetweenswitchterminalsthe
doorisclosed,theswitchisdefective.
Replacetheinterlock
monitorswitch
Fuseis
Open
Layershortofthe
secondarycoilof
H.V.Transformer
Thefusewillnotblowrightaway,butifitblowsin
afewseconds,thenthereisalayershortIfthe
fuseblowswithH.V.Transsecondaryopen,the
transformermaybefaulty.
ReplaceH.V.Transformer
Ovenlamp
doesnot
light.
1)Fuseblownout Checkfuse. Replacethefuse.
2)Poorcontactof
powercord.
Checkcontinuityofpowersupplycord.Also
checkwhetherthepowercordissecurelywired.
Adjustorreplace
thepowersupplycord
3)Defectivelamp Thefanmotorrotates,butlampdoesnotlight. Replacethelamp.
4)Defectivetimer
contacts
Checktheterminalsoftimerforcontinuity,turning
thetimerknobONandOFFrepeatedly.
Replacethetimer.
5)Thermalcutout
S/Wopen
Inthiscasetheovenlampandfandonotturnon
Replacethethermal
cutoutS/W
Fandoes
notoperate.
1)Defectivefan
motor.
If230Visfoundatmotorterminals,themotor
shouldbereplaced.
Replacethemotor.
2)Defectivecon-
tactsoftimer
Theovenlampdoesnotlightandfanmotordoes
notoperate.
Replacethetimer.
WARNINGFORHIGHVOLTAGE
4000VOLTSEXISTATTHEHIGHVOLTAGEAREA.DONOTOPERATETHEOVENWITH
CABINETPARTSREMOVED.DONOTREMOVETHECABINETPARTSIFTHEPOWERSUPPLY
CORDISPLUGGEDINTHEWALLOUTLET.UNPLUGTHEPOW ERCORDBEFORESERVICING.
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