Specifications

TroubleshootingGuide

27|Page


6.MAINTENANCE
Become familiar with the components before attempting these procedures, utilizing the Installation
Manualandreferencingthecomponentschematiconthelastfewpagesofthemanual.
Safetyisthemostimportantpartofthisguide.Theseproceduresmustbedonebyalicensedcompetent
technician.A.O.Smithisnotliablefor
theactionsofthetechnicianif he/shefailstoadheretoanyorall
safetyprocedures,specificallyinregardstoelectricalandgassafety.
CLEANINGTHERODASSEMBLY

1) TOOLS
‐Gatherthefollowingmaterialstogether:
a. Sheetof100GritSandpaper
b. #2PhilipsScrewDriver
c. Flashlight

2) POWER
‐Disconnectpowertoyourunitbyeitherunpluggi ngitfromthewalloutlet,orbythecircuit
breaker,dependingonthesetup.The3‐digitLEDonthePCBshouldnotbelit.

3) FRONTCOVER
‐Removethefrontcover.Itisheldonbytwoscrewsonthetopcornersofthe
tanklessunit.

4) RODASSEMBLY
–
a. Locatetheblack,yellow,andorangewireslocatedinthecenteroftheunit.
b. RemovethethreePhillipsheadscrewsholdingthepanelinplace.
c. Pulltheassemblyout.Caution,allpiecesareseparate.Becarefultonotlosethesightglass.

5) SENSORS
–Itisimportanttobeverygentlewiththesensorrodswhilecleaningthem,astheywill
easilybendoutofplace.Theiroriginalpositionrelativetotheburnerneedstobeunalteredto
functionproperly.
a. Cleantheflamesensorwith100gritsandpaper,thoroughlytoabright
finish.
b. Cleantheairfuelratiorodwith100gritsandpaper, thoroughlytoabrightfinish.

6) REASSEMBLE
‐Reassembletheunitinreverse
order–sightglass,gasket,rods,andmetalcover.
Keypointstoremember:
a. Connectall3wiresonfrontofburner.
b. Inspectallofthegaskets.



Figure30