A.O. Smith 110 User Manual

TroubleshootingGuide
12|Page

TM‐RE30(Optional)

5.3TROUBLESHOOTING‐ERRORCOD ES 
• Allunitsareselfdiagnosticforsafetyandconveniencewhentroubleshooting.
• Ifthereisa problemwiththe installation ortheunit,itwilldisplaya numerical errorcode on
the Remote Controller (if installed), on the 7‐Seg LED on the computer board (510 (T‐D2)), or

theflashingredLED(110(T‐KJr2),310(T‐K4))tocommunicatethesourceoftheproblem.
• Consultthefollowingchartforthecauseofeacherrorcode.
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Table2–ErrorCodes
ErrorCode
510(T‐D2)
7‐SegLED,
remote
ErrorCode
110(T‐
KJr2),310
(T‐K4)
Remote
ErrorCode
RedLED
110(T‐KJr2),
310(T‐K4)

MalfunctionDescription
031 03 1 IncorrectDipswitchSettings
101 10 5 Warningfor991ErrorCode
111 11 3 IgnitionFailure
121 12 3 FlameLoss
311 31 2 OutputThermistor
321 32 2 InletThermistor
331 N/A N/A MixingThermistor
391 39 2 Air‐fuelRatioRodFailure
441 N/A N/A FlowSensor(Easy‐LinkSystemonly)
510 51 6 AbnormalGasValves
N/A 55 6 AbnormalSolenoidGasValve
611 61 4 AbnormalFanMotor
651 N/A N/A AbnormalFlowAdjustmentValve(Easy‐LinkSystemonly)
701 70 1 ComputerBoardFault
721 72 6 FalseFlameDetection
741 74 N/A RemoteControllerCommunicationFailure
761 N/A N/A CommunicationFailure(Easy‐LinkSystemonly)
991 99 5 Abnormalcombustion
Errorcodeon
theTK‐RE02

Errorcodeonthe
computerboard
RedLED
Errorcodeon
theTM‐RE30
Errorcodeonthe
computerboard
7‐SegLED
Figure4
–
310(T‐K4),110(T‐KJr2)ErrorCodeoutputs
Figure5
–
510(T‐D2)ErrorCodeoutputs

A.O. Smith 110 Specifications

General

Brand	A.O. Smith
Model	110
Category	Water Heater
Language	English