A.O. Smith 28 30 50 60 service manual S02 blocking error, S03 blocking error, S04 blocking error

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Warning

Maintenance may only be performed by a qualified service and maintenance engineer.

Table 10.2 Displayed errors (Sheet 1 of 10)

is

	Code + Description	Possible cause	Solution	Remark

	S01 (blocking error)	Sensor is not	Connect the sensor lead to JP3.	See appendix ’A.2 Electrical diagram BFC’.
	Open circuit from	(correctly) connected.
	temperature sensor T2
	temperature sensor T2	Damaged wiring or	Replace the sensor.	To replace the necessary parts, you must contact your installer.
	at bottom of tank.	defective sensor.
		defective sensor.

	S02 (blocking error)	Sensor is not	Connect the sensor lead to JP5.	See appendix ’A.2 Electrical diagram BFC’.
	Open circuit from	(correctly) connected.
	sensor 1 of
	temperature sensor T1
	at the top of the tank(1).
	at the top of the tank(1).	Damaged wiring or	Replace sensor T1.	To replace the necessary parts, you must contact your installer.
		Damaged wiring or	Replace sensor T1.
		defective sensor.

	S03 (blocking error)	Sensor is not	Connect the sensor lead to JP5.	See appendix ’A.2 Electrical diagram BFC’.
	Open circuit from	(correctly) connected.
	sensor 2 of
	sensor 2 of	Damaged wiring or	Replace sensor T1.	To replace the necessary parts, you must contact your installer.
	temperature sensor T1	Damaged wiring or	Replace sensor T1.
	temperature sensor T1	defective sensor.
	at the top of the tank(1).	defective sensor.
	S04 (blocking error)	Dummy is not	Connect the dummy sensor lead(2) to JP4.	See appendix ’A.2 Electrical diagram BFC’.
	Open circuit from	(correctly) connected.
	dummy 1.
	dummy 1.	Defective dummy.	Replace the dummy sensor.	To replace the necessary parts, you must contact your installer.
		Defective dummy.	Replace the dummy sensor.

	S05 (blocking error)	Dummy is not	Connect the dummy sensor lead(3) to JP4.	See appendix ’A.2 Electrical diagram BFC’.
	Open circuit from	(correctly) connected.
	dummy 2.
	dummy 2.	Defective dummy.	Replace the dummy sensor.	To replace the necessary parts, you must contact your installer.
		Defective dummy.	Replace the dummy sensor.

	S11 (blocking error)	Short circuit in the	Replace sensor T2.	To replace the necessary parts, you must contact your installer.
	Short circuit from the	sensor circuit.
	temp. sensor T2 at the
	bottom of the tank.

Release R.1.3 UK

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Contents Release R.1.3 UK Your installer Trademarks CopyrightLiability More informationPage Gis Table of contentsControl panel Filling and drainingStatus of the appliance Starting up and shutting downTroubleshooting Service programMaintenance frequency MaintenanceIndex AppendicesWhat to do if you smell gas Regulations IntroductionAbout the appliance Symbol Target group Target groups Maintenance Forms of notationRemark IntroductionDocument Overview of thisOverview of this document Chapter Target groups DescriptionGis Introduction Functional description of the appliance Functioning of the applianceIntroduction Pressure switch Ionisation rod Water temperature protection Gas controlAppliance’s heating cycle Protection for the appliance Pressure switch Water temperature protectionGas control 3 FanUnvented installation Safety of the instal- lationVented installation Ionisation rodIntroduction Packaging Environmental conditions InstallationMaximum floor loading Humidity and ambient temperatureWater composition Working clearancesWorking clearances Environmental conditionsPlan and elevation of the appliance Technical specificationsTechnical specifications DimensionsDime Description BFC Nsion Unit BFCVAC Gas data Installation diagramGeneral G30-30 mbar butaneUnvented InstallationHot water side Water connections, Unvented Cold water sideCirculation pipe Condensation drainageGas connection Water connections, VentedSee paragraph ’3.6.4 Condensation drainage’ See din FigureAir supply and flue gas discharge Dimension BFCAir supply and flue gas discharge Concentric wall flue terminal Specification DescriptionConcentric roof flue terminal Concentric roof flue terminal specificationsPreparation Electrical connectionPreparation Mains voltage Electrical connection Mains voltageIsolating Transformer Extra on mode switch Tank onContinuous pump Program-controlled pumpChecking the supply Pressure and burner Connecting extra error signal Alarm OUTChecking the supply pressure and burner pressure ApplianceMain menu Conversion to a different gas category Conversion to a different gas categoryRemove the burner as complete assembly Check the burner and supply pressure see paragraph 13 Conversion of gas controlInstallation Filling vented installations Filling the appliance Filling unvented installationsFilling and draining Filling the applianceFilling and draining Installation diagrams F d cDraining vented installations Draining unvented installationsDraining the appliance Draining the applianceGis Introduction Operating Control panelNavigation buttons Explanation of the icons ON/OFF switch of ThermoControlPC connection Control panelStatus of the appliance Operating modes Error conditions Service conditionIntroduction Operating modes Status of the appliance Error conditionsService condition Service conditionGis Starting up and shutting down Open the gas valve see ’ .1 Installation diagrams’Introduction Starting up Shutting downDisconnect the appliance from the mains Shut the appliance down for a brief period OFF modeShut the appliance down for a longer period Starting up and shutting downAppliance’s heating cycle Appliance’s heating cycle12 Ignition Notational convention for menu-related instructions Main menuSetting the water temperature via Setpoint Menu Switching into on mode Setting the water temperatureSetting water temperature during on mode Starting up and shutting down the week program Week programme IntroductionChanging the appliance’s standard week program Remark Setting switch-off time Setting the switch-on timeExample Setting program-controlled pump Setting the water temperatureAdding times to a week program Week programme20 Period added Deleting times from a week program23 week program options Programming an extra period Extra periodSetting menu language SettingsSettings Displaying appliance specifications Remark Setting day and time46 Main menu Gis Setting the hysteresis Service programDisplaying the error history Setting the service interval Setting the pump on/offService program Displaying the appliance historySetting the backlight time Setting the display contrastSetting the display scroll speed Setting the display contrastService program General errors TroubleshootingDisplayed errors Symptom Cause Solution Remark Gas smell Gas leak Troubleshooting table for general errorsSee appendix ’A.2 Electrical diagram BFC’ Symptom Cause Solution Remark Display is offWater leakage Symptom Cause Solution Remark Explosive ignition Troubleshooting table for displayed errorsInsufficient or no hot WaterS03 blocking error S02 blocking errorS04 blocking error S05 blocking errorS14 blocking error S13 blocking errorS15 blocking error F02 lock out error Phase-sensitive. See ’3.10 Electrical connection’Appliance specifications’ How to bleed air from the gas line, and measure the supply F07 lock out error F06 lock out errorF08 lock out error ’3.9 Air supply and flue gas discharge’F10 lock out error Error F09 remains active in the event that the waterRelease R.1.3 UK Release R.1.3 UK E01 blocking error C04 blocking errorE03 blocking error E04 blocking errorDetermining service interval Maintenance frequencyMaintenance frequency Remark Preparation for maintenance MaintenanceStarting up Maintenance Cleaning condensation water discharge Descaling and cleaning the tankCleaning the burner Water-side mainte- nance IntroductionCleaning heat exchanger Cleaning the orifice12.4.3 Remark Finalising mainte- nanceWarranty Certificate Warranty Certificate Week program card AppendicesAppendices Electrical diagramWeek program card Release R.1.3 UK Index IX IndexIX Index 0306