Rinnai BC 70 2A Specifications

1RinnaiTanklessWaterHeaterTroubleshootingManualWARNINGThereareanumberofliveteststhatarerequiredwhe

10connectedpleaseinstalloneperRinnaiventinginstructions.Ifacondensatelineisin use,inspecttheventconnectorontopofwaterheatert

11Code12TroubleshootingProcedureFlameFailureRequestpicturesofthegaspiping,meter,regulator,tankandanyflexconnectorsusedinthesy

12ensuringyouhaveatleastthreegpm'sofflowthroughthewaterheater.Youcanusetheunit'skeypadtocheckyourflowratetoverif

13wherethecondensateis comingfrom.Itcouldbeaventingissueorleakinsidetheheatexchangecombustionboxarea.13.Ensureinstallerused

14unitwilltrytofirethreetimes.Thatwillnotoccurontheimmedi atecode12.Thefanmotormaytrytocomeonbutimmediatelygoesintoacod

15Code14TroubleshootingProcedureThermalFuseorOverheatRequestpicturesoftheinternalcomponentsinsidethewaterheater’scasingespecial

16Increasesetpointofaqua‐statbyatleasttwentydegreeslowerthanthewaterheater's setpoint.Thiswillnormallystoptheunitfromsh

17Code16TroubleshootingProcedureOverTemperatureWarning(Safetyshutdownbecauseunitistoohot)1. Checkforlowflowincirculationsyste

18Code19TroubleshootingProcedureElectricalGrounding1. Checkallcomponentsforelectricalshort.

19Code25TroubleshootingProcedureCondensateTrapisfull1. Inspectcondensatedrainlineforblockage.2. Inspectcondensatetrapandtank

2TableofContentsCodeNumbersPage#03………………………………………………………………………………………………………………………………………………405…………………………………………………………………………

20Code31TroubleshootingProcedureBurnerThermocouple1. Checklow/highfiremanifoldpressuresforpropersettings.Seegaspressuresettingp

21Code32TroubleshootingProcedureOutgoingWaterTemperatureThermistorFault1. Checkthermistorwiringharnessforloose,brokenordamagedc

22Code33TroubleshootingProcedureHeatexchangeroutgoingthermistor1. Checkthermistorwiringharnessforloose,brokenordamagedconnection

23Code34TroubleshootingProcedureCombustionairtemperaturethermistor(InternalunitsONLY)1. Checkthermistorwiringharnessforloose,bro

24Code41TroubleshootingProcedureFreezeProtectionSensorforExternalUnits1. Checksensorwiringharnessforloose,brokenordamagedconn

25Code51TroubleshootingProcedureInletWaterTemperatureSensor1. Checksensorwiringharnessforloose,brokenordamagedconne ctionsfrom

26Code52TroubleshootingProcedureModulatingSolenoidValveSignalAbnormal(POV)1. Checkwiringharnessforloose,brokenordamagedconnecti

27Code57TroubleshootingProcedureBurnerOverheatBi‐metalSwitch1. Checkburneroverheatbi‐metalswitch wiringharnessforloose,brokenor

28Code58TroubleshootingProcedureSecondaryHeatExchangerSensor1. Checksensorwiringharnessforloose,brokenordamagedconne ctionsfrom

29Code61TroubleshootingProcedureCombustionfanMotorNOTE:Beforeservicingfanmotorturnoffpowersupplytotheunit.Neverattempttoplug

3NoCode…………………………………………………………………………………………………………………………………….36LC,LCO–LC9.……………………………………………………………………………………………………………………………37FF………..…………………………

30Code65TroubleshootingProcedureWaterFlowServo1. Checkwiringharnesstothewaterflowservoforloose,brokenordamagedconnectionsfro

31Code70TroubleshootingProcedurePCBoardFault1. CheckallwiringharnessattheconnectiontothePCboardtoensuretheyarenotloose,br

32Code71TroubleshootingProcedureSV0,SV1,SV2,SV3SolenoidValveFaultNOTE:Beforeservicingproductdisconn e ctpowersupplytotheunit. 

33Code72TroubleshootingProcedureFlameSensingDeviceFaultNOTE:Beforeservicingproductdisconn e ctpowersupplytotheunit. 1. Check

34Code73TroubleshootingProcedureBurnerThermocoupleFault1. CheckwiringharnessatburnerthermocouplebacktoPCboardforloose,brokeno

35Code79TroubleshootingProcedureWaterLeakageDetected1. Checkwiringharnessatleakdetectorforloose,brokenordamagedwiringorconnec

36NoCodeTroubleshootingProcedureNothinghappenswhenwaterflowisactivated1. Cleanwaterinletfiltertowaterheater. 2. Onnewinstal

NOTE12ThcoOoOby• • After• • AaThis hCodeE:Beforeserv.Flushheate.NOTE;theLhedisplaywiontinuetobeOnolderprodun.

38CodeFFTroubleshootingProcedureIndicatesaservicemanhasservicedproductThiscodeindicatesaserviceproviderperformedmaintenanceor

39ColdWaterSandwichcausedbyfaultyfixture:1. Havecustomerexplainproblem.2. TurnoffhotwaterballvalveontheRinnaivalvekitatthe

4Code03TroubleshootingProcedurePowerinterruptionduringbathfill(Waterwillnotflowwhenpowerreturns)1. Turnofallhotwaterfixtures

40ColdWaterSandwichcausedbyLowFlow:1. Openfixtureandrecordflowrateusingthewaterheater’stemperaturecontrolpad.2. Shutoffho

41whenthewateristurnedbackonwithinafewminutesofthedemandsystemcycling,andcoldwatersandwichiscreated.j. Looseorbadelectric

Howtoreetrieveflow42wrate/temmperatureooutput

5Code05TroubleshootingProcedureBypassServo2. Turnoffpowersupplytounit,reapplypower.Fireupunit.Ifcode05reappearsreplacebypas

6Code10TroubleshootingProcedureAirSupplyorExhaustBlockageRequestpicturesoftheentireventsysteminside/outsidethehomeorbusiness.R

710.Removeburnermanifoldandinspectforinsectsorotherdebrisinairchannelforrestriction.11.Removeburnerandinspectcopperfinsinh

8Code11TroubleshootingProcedureNoIgnitionRequestpicturesofthegaspiping,meter,regulator,tankandanyflexconnectorsusedinthesyst

910.Lookintoviewwindowonappliancetoseeifyoueverseeaflameintheburnerboxwhiletheunitisgoingthroughtheignitioncycle.Ifyou