Superior GRD-5000N - Troubleshooting System Issues

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TROUBLESHOOTINGTHEELECTRICPIEZOIGNITOR
ANDGASCONTROLSYSTEM
MODELSGHC-5000N,GHC-5000L,GRD-5000N,GRD-5000L
Note:Beforetroubleshootingtheeleetriepiezoignitorsystem,besureexternalgasshutoffvalve,locatedatthegassupplyinlet,isinthe"ON"position.
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NOTE:DIAGRAMS&ilLUSTRATIONSNOTTOSCAlE
SYMPTOM
POSSIBLECAUSES
CORRECTIVEACTION
1.Sparkignor willnotlightpilotafter
A.Defectiveignor 1.Checkforsparkatelectrodeandpilot;ifnospark
repeatedtriggeringofredbutton.
(nosparkatelectrode). andelectrodewireisproperlyconnected,replace
theignor.
B.Defectiveormisalignedelectrodeatpilot
1.Usinga match,lightpilot.Ifpilotlights,tumoff
(Sparkatelectrode). pilotandtriggertheredbuttonagain.Ifpilotlightsan
impropergasmixturecausedthebadlightinganda
longerpurgeperiodisrecommended.Ifpilotwillnot
light-checkgapatelectrodeandpilot
-shouldbe
1/8inchtohaveastrongspark.IfOK,replacepilot
assembly(Figure27).
2.PilotwillnotstayI aftercarefullyfollowing
A.Defectivepilotgenerator(thermopile)or
1.Checkpilotflame.1tmustimpingeonpilotgen-
lightinginstructions.
remotewallswitchwiring. erator(Figure27). Cleanand/oradjustpilotfor
maximumflameimpingementongenerator.
2.Besurewireconnectionsfromgeneratoratgas
valveterminalsare tight andgeneratoris fully
insertedintopitotbracket.
3.Oneofthewallswitchwiresmaybegrounded.
Removewallsch wiresfromvalveterminals.If
pilotnowstaysm,tracewallswch wiresfora
ground.Maybegroundedtofumaceorgassupply.
4.Checkpilotgeneratorwh miltivohmeter.Take
readingatgeneratorterminalsofgasvalve.Should
read325miltivoltsminimumwhileholdingvalve
knobdepressedin pilotposion andwallswitch
"OFF".Replacefauhygeneratorifreadingisbelow
specifiedminimum.
B.Defectiveautomaticvalveoperator. 1.Turnknobto "ON",placewallswitchto "ON"
mlivoltmetershouldreadgreaterthan100MV.If
thereadingisOKandtheburnerdoesnotcomeon,
replacethegasvalve.
3.Pot burning,nogastoburJlftr,valveknob
A.Wallswitchorwiresdefective.
1.Checkwallswitchandwiresforproperconnec-
"ON",wallswitch"ON". tions.Jumpwiresfor properconnections.Place
jumperwireacrossterminalsat wallsch. If
burnercomeson,replacedefectivewaDswitch.If
OK,placejumperwiresacrosswallsch wiresat
gasvalve.Ifburnercomeson,wires
aredefective
orconnectionsarebad.
B.Pot generatormaynotbegenerating
1.Re-checkSymptom#2.
sufficientmivohage.
C.Pluggedburnerorifice. 1.Checkburnerorificeforblockag9andremove.
4.Frequentpilotoutageproblem.
A.Pilotflamemaybetooloworblowing(high) 1. Clean/adjustpilotflametormaximumflame
causingthepilotsafetyto dropout.
impingementonpilotgenerator(FIgUf927).