Vaillant ecoMAX pro 18E Instructions For Use Installation And Servicing

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Vaillant ecoMAX pro 18E Instructions For Use Installation And Servicing Manual pdf 34 page image

Instructions for Use, Installation and Servicing ecoMAX pro3416 Fault finding16.3 Fault CodesFault codes take priority over all other display functionsin the event of a system fault occurring.Code Description CommentF1 Ignition fault (lockout) No gas; Insufficient gas; Incorrect gas valve adjustment; Electrode defect;Failed to light Ignition lead defect; Electronic igniter defective; Check air inlet duct;Check connections to igniter unitF4 Ignition fault (lockout) As aboveWent out when litF5 Overheat fault Overheat stat operated; Maximum temperature exceeded;Check thermistor connections; Air in system with thermistor at maximumsetting; Faulty overheat stat connection; Check that pump is wired intoappliance and not from programmer. This would cause no pump overrunF6 Central heating flow NTC fault Flow NTC cable defective/broken NTC faultyFlow thermistor not fitted correctly, Check pipe work configurationF10 Central heating return NTC fault Return NTC cable defective/broken NTC faultyCheck that thermistor attached correctly to pipe.F11 No reception by main board Connection fault between main PCB and interface; Faulty interface;Faulty main PCB (processor), Check fanF12 No reception by the local user interface As F.11F13 Main board fault As F.11F14 Central heating flow t° > 95° C System fault; Possible external pump failure; Check NTC on flowCheck that pump is wired into appliance and not from programmer.This would cause no pump overrunF16 Flame detection fault(flame presence >5 s after burner stop) Gas valve defectiveF17 Power supply <170 V Check electrical supply / polarity, Check fanF18 Local user interface fault Connections; Faulty interfaceF19 Central heating NTC unplugged Check NTC connectionF20 MMI software incompatible with IRIS software Possible connection faultF24 Central heating return t° >90°C System fault; Possible external pump failure; Check NTC on return;Check that pump is wired into appliance and not from programmer.This would cause no pump overrun.F25 Maximum temperature rise slope Possible external pump failure; Air in system restricting movement of water.Insufficient circuit flowF26 Maximum delta t Check NTC on return; System fault – too restrictive?; Possible pump failure16.2 Fault MemoryThe fault memory stores details of the five most recentfaults. To display the fault memory, proceed as follows;• With the interface in ‘normal’ mode, press and hold the‘mode’ button ( ) for 10 seconds until a flashing ‘0’appears.• Press the ‘mode’ button again.• The 5 fault memory screens are now available to beviewed, memory 1 being the most recent. Within eachmemory screen, 5 additional screens provide furtherinformation to assist the installer/engineer.To cancel the fault memory mode proceed as follows;• Press and hold the ‘mode’ button for 10 seconds untilthe screen returns to the ‘user’ mode.No. Memory screen type Comments1 Fault code Fault code 1 – 26 (see page 34 – ‘Fault finding’)2 Burner phase Working phase3 DHW temperature No function4 CH flow temperature °C at time of fault5 Tank temperature No function