
BeforecontactingRinnaiforservice,pleasefollowthefaultndingguide.Iftheproblempersistsorthisinformation
doesn’tansweryourquestions,contactRinnaionthephonenumberonthebackofthismanual
ServicecalloutsattendingtoanyconditionorfaultthatisnotrelatedtoRinnaiproductorcomponentsmaybe
chargeable.
INSUFFICIENT OR NO HOT WATER
Excessive hot water
consumption Insufcientowmayoccurifmultipleoutletsareinuseatthesametimeandexceedthe
ratedowcapacityofthegasbooster.Ifso,reducethenumberofoutletsinuse.
Considerdiscussingwithyourinstaller,ttingwatersavingxturesand/orowcontrolor
pressurelimitingvalvestoreduceconsumption.
Incorrect solar system size Thesystemmaynothavebeenadequatelysizedtosuitthehousehold.
Temperature and pressure
relief valve / expansion
control valve discharging
water continuously
PTRValves&ECVValves(iftted)
Itisnormalanddesirablethatthesevalvesallowsasmallquantityofwatertobedischarged
duringtheheatingcycle.Iftheydischargesmorethanastandardbucketofwaterduringa24
hourperiodordischargescontinuouslytheremaybeanotherproblem
Ifwatercontinuouslydribblesfromthevalve,tryeasingthevalvegearforafewsecondsas
describedinthesection‘MaintenanceandRegularCare’onpage8.Thismaydislodge
anyforeignmatterandalleviatetheproblem.
Ifthevalvedischargesathighows,contactyourinstallerorRinnaitodiscuss.
Gas booster not operating
orinsufcientgassupply
for gas boosted heating
system
Checktoensurethepowercordofthegasboosterispluggedinandswitched‘on’.
Checkgasisavailableandtheisolationvalveisopened
Closethehottapandwaitfor10secondsandopenitagain.Thehottapmustbeopened
enoughtoensurethattheowrateissufcientforthegasboostertolight.
Checkifthereisgassupplytootherappliancesintherestofthehouse
NO WATER FROM THE HOT TAP
Restriction in the hot tap
or failure of the cold water
supply to the heater
Checkforwaterowattheotherhottapsandthatthecoldwaterisolationvalveisfullyopen
HIGH GAS BILL
Temperature and pressure
relief valve / expansion
control valve discharging
water continuously
Seeentryunder‘InsufcientorNoHotWater’
Lack of solar gain Reducedsunlightduetoovercastweatherinsummerorlowsolarcontributioninwinterwill
resultinanincreaseddependenceonelectricityorgasboosting.Higherelectricityorgas
billsundertheseconditions,especiallyinwinter,arenormal.
Ifthesolarcollectorsareshadedbytreesorotherobjects,ortheglassisdirty,the
effectivenessofthecollectorsisgreatlyreduced.Arrangefortrimmingofthetreesor
relocationofthesolarcollectorsiftheobstructionispermanent.Arrangeforcleaningofthe
collectorglass
Solarcollectorsincorrectlypositionedwillalsoseverelyaffectthesolargain.Checkthat
positioningandalignmentofsolarcollectorsisinaccordancewiththesection‘System
OrientationandInclination’onpage16.
CONDENSATION IN COLLECTORS
Condensation in solar
collectors Thereisasmallamountofventilationbetweenatmosphereandtheinternalsofthesolar
collectortoensureefcientoperation.Undercertainweatherconditions,watervapour
naturallypresentintheairmaycondenseontheinsidesurfaceofthecollectorglass.This
doesnotaffecttheperformanceofthesystem.IfyouareconcernedcontactRinnaito
discuss.
NOISY SOLAR COLLECTORS
Noise from solar collectors Occasionallyondaysofhighsolargain,thewatertemperatureinthecollectormaybecome
veryhigh.Thenoisemaybesimilartoaboilingkettle,oranexpandingcontractingmetallic
sound.Thecollectorisdesignedtowithstandtheseconditions,andnoactionisneeded,
unlessitisextreme.ContactRinnaitodiscussifyouhaveanyconcerns.
WATER HAMMER
Hot and cold water
plumbing in the premises Contactyourinstalleroraplumbertodiscusscheckingtheclippingofhotandcoldwater
pipeworkandinstallapressurelimitingvalveorwaterhammerarrestorasrequired
WATER COMING FROM COLLECTORS
Frost Valve(s) Operating Inconditionswherethewaterinthesolarcollectorcouldfreezeanddamagethecollector,
thefrostvalve(s)willreleaseasmallquantityofwatertopreventthebuildupofpressure.
Rinnai 9 LowProleRoofMountedOIM
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