Manuals / A.O. Smith / Household Appliance / Water Heater

A.O. Smith 28 30 50 60 service manual Release R.1.3 UK

Models: 28 30 50 60

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Warning

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

Table 10.2 Displayed errors (Sheet 9 of 10)

Code + Description	Possible cause	Solution		Remark

C02 (lock out error)	Incorrect reference	1.	Reset the ThermoControl.	To replace the necessary parts, you must contact your installer.
Error message from	voltage from the AD	2.	Check that the frequency of the mains power complies with
Error message from	converter.	2.	Check that the frequency of the mains power complies with
the water heater	converter.		table 3.8. If this is not the case, contact your installer.
the water heater			table 3.8. If this is not the case, contact your installer.
controller.		3. If the frequency is correct but the error persists, replace the

Internal error message	EEPROM read error.		ThermoControl.
from the water heater
controller.
controller.	50 Hz error.
	50 Hz error.

	Internal
	communication error

Internal error message	Gas valve relay error.
from the water heater
controller.
controller.	Safety relay error.
	Safety relay error.

	Ignition relay error.

	RAM error.

	EEPROM error.

	EEPROM contents do
	not match the software
	version.

	Processor software
	error.

Release R.1.3 UK

Page 81

Image 81

A.O. Smith 28 30 50 60 service manual Release R.1.3 UK

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 AppendicesIntroduction What to do if you smell gas RegulationsAbout the appliance Symbol Target group Target groups Maintenance Forms of notationRemark IntroductionDocument Overview of thisOverview of this document Chapter Target groups DescriptionGis Functioning of the appliance Introduction Functional description of the applianceIntroduction Water temperature protection Gas control Pressure switch Ionisation rodAppliance’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 FigureDimension BFC Air supply and flue gas dischargeAir supply and flue gas discharge Concentric wall flue terminal Specification DescriptionConcentric roof flue terminal Concentric roof flue terminal specificationsElectrical connection PreparationPreparation 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 panelOperating modes Error conditions Service condition Status of the applianceIntroduction 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 menuSwitching into on mode Setting the water temperature Setting the water temperature via Setpoint MenuSetting water temperature during on mode Week programme Introduction Starting up and shutting down the week programChanging the appliance’s standard week program Remark Setting the switch-on time Setting switch-off 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 periodSettings Setting menu languageSettings Displaying appliance specifications Remark Setting day and time46 Main menu Gis Service program Setting the hysteresisDisplaying 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 Troubleshooting General errorsDisplayed errors Symptom Cause Solution Remark Gas smell Gas leak Troubleshooting table for general errorsSymptom Cause Solution Remark Display is off See appendix ’A.2 Electrical diagram BFC’Water 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 errorS13 blocking error S14 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