Vaillant ecoTEC plus Operating Instructions Manual

Also see for ecoTEC plus SERIES: Instructions for use Instructions for use Instructions for installation and servicing Instructions for use Instructions for installation and servicing

Vaillant ecoTEC plus Operating Instructions Manual Manual pdf 23 page image

TroubleshootingOperating instructions ecoTEC plus 0020116701_00 2377.2 Detecting and rectifying malfunctionsIf problems occur whilst operating your boiler, you cancarry out the following self-checks:Problem Possible cause SolutionNo hot water, heating stayscold;Boiler does not startBuilding gas isolator cock closed > Open building gas isolator cock (¬ Sec-tion 5.1.1)Building power supply switched off > Switch on building power supplyOn/off switch on boiler switched off > Switch on the on/off switch on theboiler(¬ Section 5.1.2)The heating flow temperature is set too low or in the"Heating off" position (¬ Section 5.6.2) and/or thehot water temperature is too low> Set the heating flow temperature to thedesired temperature (¬ Section 5.2) and/orset the hot water temperature to the desiredtemperature (¬ Section 5.3.1 and 5.4)Filling pressure of the heating system too low > Top up the heating system with water(¬ Section 5.1.4)Air in the heating system> Purge the radiators.> If the problem occurs again:Contact your heating engineerIgnition malfunction> Press the reset button> If the problem occurs again:Contact your competent person (¬ Sec-tion 7.4)DHW mode without any prob-lems;Heating does not start:No heating demand via the controller> Check the timer programme on the control-ler and correct it if necessary.> Check the room temperature and, ifrequired, correct the target room tempera-ture(¬ Section 5.5; ¬ Controller operatinginstructions).7.1 Detecting and rectifying malfunctions> If, after checking the points mentioned in Tab. 7.1, yourboiler still shows signs of a fault, contact your approvedcompetent person to troubleshoot the problem.7.3 Rectifying a water shortage0,7bar7.2 Display of the filling pressure for the heating system is toolowIf the filling pressure for the heating system falls below0.08 MPa (0.8 bar), the right-hand bar display and the cur-rent filling pressure flash in the display.