Service Guide

TroubleshootingGuide

7|Page

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5.TROUBLESHOOTING

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5.1PRELIMINARYCHECKLIST

Checkallofthesebasicitemsbeforeproceedingontoanyothersection:

• GAS/WATER/ELECTRIC:

o Thegassupplyvalveshouldbefullyopen.

o Verifythecorrectgastypeisbeingused,NGorLP.

o Thewatersupplyvalveshouldbefullyopen.

o Theunitshouldbeconnected

toa120VAC60Hzpowersupply.

• REMOTE:Ifyouareusingaremotecontroller,theremote’spowerbuttonmustbeturnedon.

• HIGHALTITUDE:Isyourlocationatanaltitudeofover3000feet?Thismaycausealack ofair.

Seethehighaltitudeprocedurein

theTroubleshootingProceduressection.

• HARDWATER:Whatisthehardnessofthewater?Asoftenerisalwaysrecommended,butif

thewaterisabove7grainsofhardnessor70‐140ppm,onemustbeinstalled.Ifthereisno

watersoftenerinstalled,existinginstallationswillgraduallyaccumulatescalebuildup

onthe

heatexchangerandcausealeak.Heatexchangerfailuresdotohardwaterscalearenot

coveredunderthewarranty.

• NEWINSTALLATIONS:Isthisinstallationafewyearsoldorbrandnew?

o Aunitthathasworkedproperlyforawhilebutisnowstrugglingmay

havebecome

scaleduporcontainsadirtyburner.

o Anewinstallationmostlikelyisinstalledorplumbedincorrectly.

• EXTERNALPROBLEM:Testwhethertheproblemiswithintheunitorexternaltotheunit(i.e.in

theplumbingsystem)byattemptingtorunhotwaterlocallythroughthepressure

reliefvalve

(PRV).

o Doestheheaterigniteandremainrunningproperly? Ordoestheheatershutdowninto

anerrorcode?IfitrunsfinethroughthePRVtheplumbingsystemisatfault.

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NEXTSTEP:Finally,checktoseeiftheunithasanerrorcode.Theerror

codewillbedisplayedonthe

sevensegmentLEDonthebottomleftofthecomputerboard.Seefigure4forlocation.

• Ifitisdisplayinganerrorcode,proceedtotheErrorCodessection(p.12).

• Ifthereisnoerrorcode,proceedtotheGeneralProblemssection

(p.8).

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