A.O. Smith ATI-110-P Technical Documents
Contents
1. SW BK z BR ge 8 gt Any Al b BL o 09909 i G7 Ground he BL JJL BR Wor eet BE p hy Heater Trans H C 2 Bk former B1 NWH Heater Vl MV BL BK Lp YK T Thermostat pam yT w P P BK eit es Bitte olo Elect rod Air fuel ratio rod Ta o 63sC ic Y Sur gel e R 7 l 6 gS ab w box Flame rod Ground BK p w V 5 G 3 r opor BL tional FM a 2 H1 e R valve e Erone H2 a AC120V Sensor R Flow Ground J BK Adjust a Inlet Valve thermistor 5 E2 Outlet 9 F 2007666005 i th ist emote A AREIS B control ler f BK i 77 BBG B66 ose i Dipswi tches VEH 4c olol os i SS fe A KK i Increase button MIN button i Decrease button MAX button i i BK BLACK R RED BL BLUE y YELLOw LB LIGHT BLUE W WHITE G GREEN O ORANGE BR BROWN P PURPLE f i i Appendix A For error code 11 Check these points during ignition stage Appendix C For error code 51 and 55 Refer to check point C in the diagram to the left and followings check voltage on the each valve on the gas valves assembly Between blue wire and light blue wire2. lt Fluctuation in hot water temperature gt gt Check if the filter on the cold water inlet cleaned Part 406 Check if the gas line sized properly and the supply gas pressure sufficient Check for cross connection between cold water lines and hot water lines Refer to Water circuit in this section Sul does not ignite when water goes through the water heater gt gt Refer to the Power supply circuit and Water circuit in this section If you use the remote controller turn the power button on and then the set temperature will be displayed on the screen Check if the filter on the cold water inlet cleaned Part 406 lt lt The fan motor still spinning after operation has stopped gt gt This is normal After operation has stopped the fan motor keeps running from 15 to 70 seconds in order to re ignite quickly as well as purge all the exhaust gas out of the flue lt lt Abnormal sound from water heater gt gt An abnormal sound from the water heaters is caused by not enough air supply or wrong installations The water heater needs more combustion air Refer to the 10 error code in the section B lt lt Power supply circuit gt gt 1 If the remote controller installed press the ON OFF button of the remote controller and make sure that the set temperature is displayed on the remote controller Restart the water heater 2 Check if the Red LED on the PCB Part 701 of the water heater is li
3. 110 Indoor 118 319143 050 Gas inlet 119 319143 049 Gas inlet ring A 120 319143 051 Igniter plate Manifold 121 319143 213 Surge box plate assembly 150 319143 350 O ring P18 NBR Black 151 319143 057 O ring P20 NBR Black 110 Indoor 152 319143 370 Silicon ring Only 110 Outdoor 153 319143 216 Rain protection plate in Exhaust chamber Only 110 Outdoor 154 319143 219 Exhaust port Only 110 Outdoor Wire clamp 60 Computer board assembly Water way assembl Water outlet section ed 53 TA Item Part Description 701 319143 164 Computer board 702 319143 182 Transformer 703 319143 168 Surge box 704 319143 222 AC120V wire 705 319143 155 Transformer wire 706 319143 141 AC120V Power ON OFF switch 707 319143 154 Switch wire 708 319143 207 Gas valve wire 709 319143 171 Flame rod wire 710 319143 209 EH IG Wire for 110 Indoor 319143 210 EH IG Wire with freeze protection thermostat for 110 Outdoor 711 319143 052 Igniter 712 319143 039 High voltage igniter wire 713 319143 185 Freeze protection thermostat Only 110 Indoor 714 319143 220 Proportional gas valve wire 719 319143 212 Computer board cover Item Part Description 401 319143 162 Heat exchanger assembly for 110 Indoor 319143 166 Heat exchanger assembly for 110 Outdoor 402 319143 167 Flow adjustment valve Flow sensor 404 319143 193 Water inlet 405 319143 197
4. 3 Normal DC 78 to 100 V Between blue wire and green wire 9 Normal DC 78 to 100 V Between blue wire and orange wire 53 Normal DC 78 to 100 V Between blue wire and red wire 73 Normal DC 78 to 100 V All check points are normal Yes gt gt Replace the gas valves assembly Part 102 No gt gt Replace the PCB Part 701 Appendix B For error code 61 Refer to check point G in the diagram to the left and followings i Check voltage between red wire andi blue wire Normal DC 110 to 160 V Check voltage between yellow wire and blue wire i Normal DC 13 to 17 V Check voltage between orange wire and blue wire Normal DC 2 0 to 6 5 V All check points are normal Yes gt gt Replace the fan motor Part 103 No gt gt Replace the PCB Part 701 1 Refer to check point B on the wiring diagram above Outlet thermistor Find the marking of No 113 on the connector Check voltage between purple wires i Check point E1 Normal AC 90 to 110 V i Inlet thermistor Find the marking of No 42 on the connector This Check point is normal it Check point E2 Yes gt gt Replace the igniter Part 711 Check resistance between black wire and black wire No gt gt Goto Next E 2 Refer to check point C and H1 on the wiring diagram above Temperature Fa se eee oe or oe Saa ISS Saloa 2 ue Check
5. Inlet drain plug 406 319143 198 Inlet water filter 407 319143 214 Inlet thermistor 408 319143 218 Outlet thermistor 409 319143 194 Water outlet 410 319143 199 Outlet drain plug 412 319143 228 Hi Limit switch 413 319143 149 Overheat cut off fuse 414 319143 200 Heater 415 319143 078 Inlet heater 450 319143 088 Pipe heater fixing plate 451 319143 125 Heater fixing plate 16 452 319143 066 Fuse fixing plate 18 453 319143 146 Fuse fixing plate 14 454 319143 082 O ring P4 FKM 455 319143 080 O ring P6 FKM 456 319143 100 O ring P14 FKM 457 319143 091 O ring P15 FKM 458 319143 083 O ring P16 FKM 460 319143 105 Fastener 14 22 461 319143 226 Fastener 16A 463 319143 065 Silicon ring Only 110 Indoor
6. four functions shown below Gas type The Gas Type dipswitch 42245678 Naturaj o2 345678 should already be Propane L C properly preset from orr MEE Gas OFF hs the factory High altitude function Model type Temperature set DEFAULT Amaaan 110 12345678 113F o 2348678 0to2 000ft OOBE ON 7 45 C ore na Indoor EE Eni ont ae see7e 122 F ou b23456768 2 000 to 4 000 ft opp BHHH 50 C al 12345678 DEFAULT QFF 110 ON E FM Aaaa Outdoor OFF 131 F GSES EE 4 000 to 6 000 ft gg o oFF The Model Type dipswitch should 55 C ofr B Over 6 000 ft already be properly preset from TOLAS ETE Consult the manufacturer the factory 140 F 308 nn 60 C OFF FM speed is increased automatically E Components Diagram Parts List Description Case assembly for 110 Indoor Case assembly for 110 Outdoor Front cover for 110 Indoor Front cover for 110 Outdoor Air blockage plate Only 110 Indoor Bracket Junction box Junction box inner pla
7. the voltage bellows i C 10 15 20 25 30 35 c re gee T blue WEE 3 Resistance ko 15 4 126 10 3 85 7 0 59 C Between blue wire and orange wire 53 i All check points are normal Normal DC78 to 100 V l Yes gt gt Replace the PCB Part 701 i H1 Check the voltage between white wire and red wire ji No gt gt Replace the wrong thermistor Part 407 408 Normal DC 1 to 15 V MaRS a re epee te aes These check points are normal Tey eer ElEorerrorcode 74 Yes gt gt Replace the gas valves assembly Part 102 Appendix E For error code 74 No gt gt Replace the PCB Part 701 Refer to check point F on the wiring diagram above 3 Check current thought the orange flame rod wire Part 709 Check voltage on the remote controller terminal on the PCB This check point is normal during operation gt gt Replace the PCB Part 701 gt gt Replace the flame rod Part 108 Normal more than 1pA Yes Normal DC 11 to 25 V This check point is normal Yes gt gt Replace the remote controller No gt gt Replace the PCB Part 701 D Dipswitch Settings on the computer board of the water heater Change the dipswitch settings when the power supply is turning off The dark square is the direction the dipswitch should be set to DEFAULT is the factory setting The dipswitches have certain special functions and generally should not need adjustment They have settings for
8. Maintenance sheet ATKJ2 62Q064 A Troubleshooting If the error code is indicated on the Red LED Refer to the Section C on the PCB Part 701 of the water heater and or the remote controller refer to Section B lt lt It t kes long time to get hot water at the fixtures gt gt The time it takes to deliver hot water from the water heater to your fixtures depends on the length of piping between the two The longer the distance or the bigger the pipes the longer it will take to get hot water Ifyou would like to receive hot water to your fixtures quicker you may want to consider a hot water recirculation system lt lt he water is not hot enough or turns cold and stays cold gt gt Compare the flow and temperature Refer to the Output temperature chart of the installation manual Check cross plumbing between cold water lines and hot water lines Check if the gas supply valve fully open the gas line sized properly and the gas supplies pressure enough Refer to the Gas supply and gas pipe sizing of the installation manual Check the set temperature and change the dipswitch setting Refer to Section D Refer to Water circuit in this section athe water is too hot gt gt Check the set temperature lower setting temperature lt lt The hot water is not available when a fixture is opened gt gt Refer to the Power supply circuit and Water circuit in this section lt
9. f the water heater Refer to installation manual 11 Three Times Ignition failure 1 2 3 7 8 9 Check gas supply and inlet gas pressure Check if the Hi limit switch Part 412 is properly functioning Check for connection breakage of wires Part 413 708 709 712 burn marks on the computer board Part 701 and or soot on the flame rod Part 108 And then if O H C F Part 413 is breakage Consult the manufacturer Check if there is a buzzing spark ignition sound coming from the burner Part 101 when water heater prepares for combustion Listen for the double clunk sound coming from the gas valves assembly Part 102 when water heater goes into combustion Only no sparking and or kick sound Check voltage on each wire to gas valves assembly Part 102 and or the igniter Part 711 Refer to the Appendix A in Section C No sparking sound gt gt gt gt gt Refer to the 1 at Appendix A in Section C No kick sound gt gt gt gt gt Refer to the 2 at Appendix A in Section C Check if there is leaking from heat exchanger Part 401 Check if there is dust and lint in nozzles of the manifold Part 102 Check current on the flame rod Part 108 Refer to the 3 at Appendix A in Section C 12 Three Times Loss of flame 1 2 3 oN Check gas supply and inlet gas pressure Check if the Hi limit switch Part 412 is properly functioning Check for co
10. nnection breakage of wires Part 413 708 709 712 burn marks on the computer board Part 701 soot on the flame rod Part 108 And then if O H C F Part 413 is breakage Consult the manufacturer Check if there is leakage from heat exchanger Part 401 Check if there is dust and lint in nozzles of the manifold Part 102 Check current on the flame rod Part 108 Refer to the 3 at Appendix A in Section C 31 32 Two Times Disconnected short circuited thermistor Check for connection breakage of wires and or debris on thermistor Part 407 408 Check thermistor resistance Refer to the Appendix D in Section C 39 Two Times Air fuel Ratio Rod failure Check for connection breakage of wires Part 709 and or soot on the AFR rod Part 108 51 55 Six Times Abnormal Gas Solenoid Valve and Main Gas Valve Check for connection breakage of wires Part 708 and or burn marks on the computer board Part 701 Reset power supply of the water heater Check voltage on the each valve on the gas valves assembly Part 102 Refer to the Appendix C in Section C 61 Four Times Fan motor fault Check for connection breakage of wires dust buildup in the fan motor Part 103 and or burn marks on the computer board Part 701 Check for frozen corrosion of connectors of the fan motor Part 103 Check voltage between blue wire and each wire of the fan motor Part 103 and check resistance between whi
11. odes The numbers in parentheses below are the numbers of blinking of the Red LED on the PCB to indicate the error codes 03 One Time Incorrect dipswitch setting Check the dipswitch settings on the PCB Refer to Section D 10 Five Times Warning for the 99 error code Check the gas type of the water heater If it s wrong gas type model replace the water heater to correct one Check if there is any blockage For example Damper sticking Vent Flaps installed on the terminator Snow build up around terminator Installed in a closet No ventilation or lack of combustion air in the intake air and or exhaust Refer to the Vent termination clearances of the installation manual If the water heater is installed as a direct vent system check whether there is enough distance between the intake air terminal and the exhaust terminal Refer to the Vent termination clearances of the installation manual Check if the total vent length doesn t exceed 50 ft and the of elbows is less than 5Ea Check the altitude elevation of area of where the water heater installed Refer to the High altitude function of the Section D And change the dipswitch settings Check if there is grease and or dirt in the burner Part 101 and the fan motor Part 103 especially if the water heater has been installed in a contaminated area Check if there is dust and lint in heat exchanger Check the manifold pressure o
12. t for a few seconds right after the power is supplied If so the power supply circuit of the water heater is under normal condition Next refer to the Water circuit in this section Check the fuse on the surge box Part 703 and if it has a brown spot need to replace it Check the power supply and make sure that the water heater has 120 VAC 5 If the Red LED on the PCB Part 701 isn t lit some electrical parts can be broken Consult the manufacturer lt lt Water circuit gt gt 1 If you set the remote controller turn the power button on and then the set temperature will be displayed on the screen Open all hot water faucets and make sure that there is enough water flow This water heater needs at least 0 75 GPM water flow to operate Check for reverse connection and cross connection Check if the filter on the cold water inlet cleaned Part 406 Check if there is no debris or obstruction on the fixtures Check if water ways in the water heater are frozen If so unfreeze them And refer to installation manual to protect your water heater from freeze 7 Check if the inlet water pressure is higher than 40 psi And if it s lower than 40 psi need to increase the pressure 8 Check for connections and breakage of wires Part 402 9 Check if the motor drive of the flow adjustment valve Part 402 is locked due to scale buildup and or water leakage Consult the manufacturer Pe N Dnunpw B Error c
13. te Back guard panel Screw M4x12 W Washer Screw M4x10 W Washer Screw M4x10 Coated Screw M4x10 Hex head screw M4x8 Screw M4x10 Screw M3x10 Pan screw M4x12 W Washer Tap tight screw M4x12 FEZN Pan screw M4x10 Case assembly 110 Indoor 110 Outdoor Item Part 001 319143 159 319143 172 002 319143 163 319143 173 003 319143 150 004 319143 184 005 319143 014 006 319143 128 007 319143 338 050 319143 025 051 319143 325 052 319143 026 053 319143 060 055 319143 063 056 319143 372 058 319143 327 059 319143 061 061 319143 201 062 319143 062 063 319143 087 064 319143 328 065 319143 059 066 319143 143 067 319143 048 Screw M3x6 Screw M4x6 Pan screw M4x8 Nylon clamp Burner assembly Burner assembly Item Part Description 101 319143 161 Burner assembly 102 319143 169 Manifold assembly with gas valve assembly LP 319143 165 Manifold assembly with gas valve assembly NA 103 319143 347 Fan motor 104 319143 341 Burner holder gasket 105 319143 031 Burner gasket 106 319143 033 Burner window 107 319143 034 Rod holder gasket 108 319143 339 Flame rod 109 319143 373 Igniter rod 110 319143 340 Rod holder 111 319143 038 Rod cap 112 319143 170 Burner damper 113 319143 044 Manifold gasket A 114 319143 045 Manifold gasket B 115 319143 160 Fan damper Only
14. te wire and red wire Refer to the Appendix B in Section C 70 One Time Computer board fault Check for connection breakage of wires Part 714 and or burn marks on the computer board Part 701 72 Six Times False flame detection 1 Clean the flame rod Part 108 2 For indoor models check if condensate drain is installed on the vent collar of the water heater 3 Check if there is leaking from heat exchanger Part 401 74 Miscommunication between water heater and remote controller 1 Check the model type of the remote controller Model No 9007666005 is the correct one 2 Inspect the connections between the water heater and remote controller Refer to Remote controller connections of the Installation manual Check the power supply of the water heater 4 If this error code appears only the Red LED on the PCB Part 701 check the voltage on the remote controller terminal on the PCB Refer to the Appendix E in Section C 5 If this error code appears only remote controller replace the PCB Part 701 6 If this error code appears both the PCB Part 701 and the remote controller replace the remote controller 99 Five Times Imperfect combustion Refer to the 10 error code in this section w C Wiring Diagram and check point of the Water heater
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