Specifications
TroubleshootingGuide
8|Page
5.TROUBLESHOOTING
5.1PRELIMINARY
CHECKLIST
Checkallofthesebasicitemsbeforeproceedingontoanyothersection:
• GAS/WATER/ELECTRIC:
o Thegassupplyvalveshouldbefullyopen.
o Verifythecorrectgastypeisbeingused,NGorLP.
o Thewatersupplyvalveshouldbefullyopen.
o Theunitshouldbeconnected
toa120VAC60Hzpowersupply.Thiscanbeverifiedby
observingthecomputerboard3‐digitLEDdisplay.Ifitisnotlit,thecomputerboardis
notbeingpowered.ChecktoseeiftheON/OFFswitchbelowthefuseboxissettothe
onposition,or
ifthefuseinthefuseboxisblown.
• REMOTE:Ifyouareusingaremotecontroller,theremote’spowerbuttonmustbeturnedon.
• HIGHALTITUDE:Isyourlocationatanaltitudeofover3000feet?Thismaycausealack ofair.
Seethehighaltitude
procedureintheTroubleshootingProceduressection.
• HARDWATER:Whatisthehardnessofthewater?Asoftenerisalwaysrecommended,butif
thewaterisabove7grainsofhardnessor70‐140ppm,onemustbeinstalled.Ifthereisno
watersoftenerinstalled,existinginstallationswillgraduallyaccumulate
scalebuilduponthe
heatexchangerandcausealeak.Heatexchangerleaksduetohardwaterscalearenotcovered
underthewarranty.
• NEWINSTALLATIONS:Isthisinstallationafewyearsoldorbrandnew?
o Aunitthathasworkedproperlyforawhilebutisnowstruggling
mayhavebecome
scaleduporcontainsadirtyburner.
o Anewinstallationismostlikelyinstalledorplumbedincorrectly.
• EXTERNALPROBLEM:Testwhethertheproblemiswithintheunitorexternaltotheunit(i.e.in
theplumbingsystem)byattemptingtorunhotwaterlocallythrough
thepressurereliefvalve
(PRV).
o Doestheheaterigniteandremainrunningproperly? Ordoestheheatershutdowninto
anerrorcode?IfitrunsfinethroughthePRVtheplumbingsystemisatfault.
NEXTSTEP:Finally,checktoseeiftheunithasanerrorcode.
Theerrorcodewillbedisplayedonthe3‐
digitsevensegmentLEDPCBatthecenteroftheunit.(Seefigure4)
• Ifitisdisplayinganerrorcode,proceedtotheErrorCodessection(p.13).
• Ifthereisnoerrorcode,proceedtotheGeneralProblems
section(p.9).