Vaillant geoTHERM SERIES Installation And Servicing

Also see for geoTHERM SERIES: System Installation Instructions Instructions for use Installation instructions Operating instructions

Vaillant geoTHERM SERIES Installation And Servicing Manual pdf 48 page image

Installer_manual_OEM_Vaillant_PROTO_3_GB - 06/11 - Vaillant- 46 -MAINTENANCEi Any work carried out on the refrigerant circuit must beconducted by qualified engineers.The faults described in this chapter require the services of aqualified professional and, if necessary, a VAILLANT Groupserviceengineer.17 Trouble-shooting17.1 fault diagnosisThe following checks should be performed before proceedingonto specific diagnostics:• Make sure that the electricity supply has not been interruptedand that the appliance is connected correctly.• Ensure that the isolating valves are open.• Check that all external controls are connected correctly.17.2 fault codesi The faults described in this chapter should becarried out by a qualified engineer or a VAILLANTGroupservice engineer.In case of anomaly, a fault code appears on the command unit'sdisplay.17.2.1 fault codes accessible from the install menuWhen the symbol "a" blinks at the bottom left of the control box,the appliance has a fault. You should access parameters 22 (lastfault code) and 23 (history of last 4 faults) on the installer menu.• Simultaneously press the ( ) and ( )buttons for 3seconds, the parameter number is displayed and its valueblinks.• Press the buttons ( ) until parameter 22 or 23 isdisplayed.• Press the (M) button to access the parameter, the value of theparameter blinks.• Press the ( ) buttons to modify the value.• Press the (M) button to confi rm the parameter setting.• Press the (OK) button to exit the menu and confi rm thesettings.• Refer to the “Hydraulic and refrigerant schematic” chapter toidentify the sensor positions.Code Description3 Heat pump return temperature sensor fault (n°15)4 Pre-regulator temperature sensor fault (n°18)5 Remote outside air temperature sensor fault6 Loss of communication with the command unit7 Control box ambient air temperature sensor faultCode Description8 Power matching fault between the electronic control circuit boardand the appliance9 Water fl ow rate (n°10) or circulator pump (n°11) sensor fault10 Outside air temperature greater than the maximum in heating(parameter 119)11 Air temperature higher than the maximum value for heating14 Loss of compressor signal15 Heat pump outlet temperature sensor fault (n°14)17 Outside air temperature sensor fault (n°2)18 Protection against short-circuits in G-Tr variator20 Error in controlling the position of the compressor rotor21 Error in current variator sensor22 Fin exchanger (n°4) or compressor intake (n°6) temperaturesensor fault23 Compressor outlet temperature sensor fault (n°23)24 Outside fan fault26 Other outside faults27 Compressor blocked28 Compressor outlet temperature error29 Compressor breakdown30 Low pressure switch31 Over-pressure valve17.2.2 Specifi c faults shown on the control box mainscreenThe faults listed below are identifi ed directly on the control boxmain screen.fault DescriptionControl box ambienttemperature sensorfaultIn the case of an anomaly in the temperaturesensor measurement, the temperaturedisplay is replaced by “--“.Control box ambienthumidity sensor faultIn the case of an anomaly in the humiditysensor measurement, the ambient humiditydisplay is replaced by “--“.Control box EEPROMfaultIf the control box non-volatile memory(EEPROM) is defective, the code “E4” isdisplayed in the control box temperaturedisplay area. If the power is cut after thisfault is displayed, the installer and aftersalesparameters will be restored to theirdefault values and the installation-specifi cparameters will be erased. This fault canresult in poor operation of the installation. Inthe case of an “E4” fault, replace the controlbox.Communications fault If communication between the control boxand the heat pump control circuit boardis disturbed, error “E3” is displayed inthe ambient temperature display area. Inthis case, check the communication cablebetween the control box and the heat pump.MAINTENANCE