Specifications

TroubleshootingGuide
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9|Page
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5.2TROUBLESHOOTING‐GENERALPROBLEMS
ProceedtotheErrorCodessectionifanerrorcodeisidentified.Forothercommonproblemsthatdo
notinvolveanerrorcode,seeifthefollowingitemshelp:
 Thewaterisnothotenough.
 Thewateristoohot.
 Temperaturefluctuateswhenafixtureisopened.

Unitdoesnotignitewhenwatergoesthroughit.
 Ittakesalongtimetogethotwateratthefixtures.
 Thefanmotorisstillspinningafteroperationhasstopped.
 Abnormalsoundscomefromtheunit.
 Lossofpressureatallsinkswhenthedishwasher
fills.
 Unithaspower,gas,andwaterbutdoes notturnon.
 MultipleHeaterSetup(Easy‐Link)
THEWATERISNOTHOTENOUGH
• Comparetheflowandtemperatureatthepressurereliefvalve.
o IfthetemperatureandflowratearecorrectatthePRVthentheproblemresidesinthe
plumbingline,notinthetanklessunit.
• Testthehotwatertemperaturewithahandheldthermometertomeasurehowfaroff
thewater
temperatureisfromthesettemperature.
o Thesettemperaturemaybesettoolow.Thetemperaturecanbechangedwiththe
pushbuttonsonthePCBorbytheremotetemperaturecontroller,ifoneisinstalled.
• Checkforcrossplumbingbetweencoldwaterlinesandhotwater
lines.SeetheProcedures
section(p.24)forinstructions.
• Unitmaybehardwaterscaled.Thescaleactsasaninsulatorpreventingtheheatexchanger
fromtransferringheattothewater.Contactaserviceagent.
• Theunitmaynotbereceivingenoughgas.
o Thegassupplyvalvemay
notbefullyopen.
o Thegaslinemaybesizedimproperly.
o Thegassupplypressuremaybetoolow.Thismay becausedbyamalfunctioninggas
supplyregulator,sochecktoseeifyourregulatorisworkingproperly.
• Checktoseethatacheckvalveis
installedbetweenthepumpdischargeandtheconne ctionto
thecoldwatersupply.Inspectthecheckvalveforproperoperation.Ifthereisn’toneinstalled,
orifitismalfunctioning,coldwatermaybeback‐feedingintothesystem.
• Double‐checkfora101errorcode.A101errorcode
willreducetheamountofgasinputinto
theheater.
• Outputtemperaturewillbeaffectedifairflowisimpeded.
o Checkconstructiondustanddebrisinventing,suchasdrywall.
o Ifthereisdustinsidethecabinet,therewillalsobedustinsidetheburnerand
heat
exchanger.Seetheprocedureforcleaningtheburner(p.28).
THEWATERISTOOHOT
• Thesettemperaturemaybesettoohigh.Thetemperaturecanbechangedwiththe
pushbuttonsonthePCBorbytheremotetemperaturecontroller,ifoneisinstalled.