Daikin Altherma EHY2KOMB28AA Installation And Operation Manual

Also see for Altherma EHY2KOMB28AA: User reference guide Installer's reference guide

Daikin Altherma EHY2KOMB28AA Installation And Operation Manual Manual pdf 35 page image

11 TroubleshootingInstallation and operation manual35EHY2KOMB28+32AADaikin Altherma hybrid monobloc – Gas boiler module4P538953-1 – 2018.0611.3.5 Symptom: The power is reducedPossible causes Corrective actionAt high rpm, the power has fallenby more than 5%.▪ Check the appliance and fluesystem for fouling.▪ Clean the appliance and fluesystem.11.3.6 Symptom: Space heating does NOT reachthe temperaturePossible causes Corrective actionWeather-dependent setpointsetting is incorrect.Check the setting on the userinterface and adjust if necessary.Temperature is too low. Increase the space heatingtemperature.No circulation in the installation. Check whether there iscirculation. At least 2 or 3radiators MUST be open.The boiler power has NOT beencorrectly set for the installation.Adjust the power. See "Maximumspace heating power setting" onpage 27.No heat transfer as a result oflime scale or fouling in the heatexchanger.Descale or flush the heatexchanger on the space heatingside.11.3.7 Symptom: No domestic hot waterNot applicable for SwitzerlandPossible causes Corrective actionThe burner is NOT firing ondomestic hot water: S3 faulty.Replace S3.The burner does NOT ignite. See "11.3.1 Symptom: Theburner does NOT ignite" onpage 34.11.3.8 Symptom: Hot water does NOT reach thetemperature (no tank installed)Not applicable for SwitzerlandPossible causes Corrective actionDomestic hot water flow is toohigh.Adjust the inlet assembly.Temperature setting for watercircuit is too low.Increase the domestic hot watersetpoint on the domestic hotwater homepage of the userinterface.No heat transfer as a result oflime scale or fouling in the heatexchanger domestic hot waterside.Descale or flush the exchangerdomestic hot water side.Cold water temperature <10°C. The water inlet temperature istoo low.The domestic hot watertemperature fluctuates betweenhot and cold.▪ The flow is too low. Toguarantee comfort, a minimumwater flow of 5 l/min isrecommended.▪ Increase the domestic hotwater setpoint on the domestichot water homepage of theuser interface.11.3.9 Symptom: Hot water does NOT reach thetemperature (tank installed)Possible causes Corrective actionThe gas boiler has an error code. Check the display of the gasboiler for more information.The outdoor unit has an errorcode.Check for possible errors on theindoor unit.The 3-way valve is not workingcorrectly.▪ Check the installation of the 3-way valve.▪ In case of domestic hot wateroperation, the flow should bedirected to the tank.11.4 Solving problems based on errorcodesWhen a problem happens, an error code appears on the userinterface. It is important to understand the problem and to takemeasures before resetting an error code. This should be done by alicensed installer or by your local dealer.This chapter gives you an overview of all error codes and thecontent of the error code as it appears on the user interface.For a more detailed troubleshooting guideline for each error, pleasesee the service manual.11.4.1 Error codes: OverviewError codes of the gas boilerThe controller on the gas boiler detects faults and indicates them onthe display by error codes.If the LED is flashing, the controller has detected a problem. Oncethe problem is rectified, the controller can be restarted by pressingthe button.Following table shows a list of error codes and the possiblesolutions.ErrorcodeCause Possible solution10, 11,12, 13,14Sensor fault S1 ▪ Check wiring▪ Replace S120, 21,22, 23,24Sensor fault S2 ▪ Check wiring▪ Replace S20 Sensor fault afterself-checkReplace S1 and/or S21 Temperature toohigh▪ Air in installation▪ Pump is NOT running▪ Insufficient flow in installation▪ Radiators are closed▪ Pump setting is too low2 S1 and S2interchanged▪ Check cable set▪ Replace S1 and S2