Necta Colibri Service Manual

Also see for Colibri: Instructions for installation, use and maintenance manual Installation, use and maintenance handbook Installation - use - maintenance

Contents

Necta Colibri Service Manual Manual pdf 19 page image

NECTA SPA TECHNICAL MANUAL “COLIBRÌ”Service Manual: Colibrì Edition 02-2002 19 /2511 - TROUBLE-SHOOTINGProblem(And/or indication on the display) Possible cause SolutionThe machine does not gointo the boiler heatingphase, remaining in the“installation” phaseNo water flow from themains or insufficient pressure(5-85 N/cm2)(0,5-8,5 bar)The air-break microswitch isfaultyWater inlet solenoid valvelocked by the overflow tubeand activated by the relevantrelayCheck for the presence of one or more of the situationsindicated and once identifying the cause do as follows:Short-circuit the microswitch to check it’s functioningUnlock the water inlet valve, undoing the threaded ring andemptying the overflow tubeCheck for 230 V AC voltage at the solenoid valve powersupply endsCheck the activation of relay K 12The display indicates themessage“No coffee”The grinder motor is lockedbecause there is no coffeeThe grinder wheels arelocked because of foreignmatter in the coffeeGrinder motor overheatingdevice triggeredThe coffee container shutterwas not openedWhen an espresso coffee selection is made the grinder isactivated conveying coffee to the doser device, the motorlock is activated by the microswitch, which is triggered whenthe set dose is reached. If such microswitch is not triggered,the system disables all espresso coffee selections, indicatingthe message “No coffee” on the display, once identifying thecause:Check the wear of the brushesFree the grinder wheels with the utmost care, as blockedwheels could have triggered the overheating protection,which is reset-able. Open the shutter, add coffeeThe display indicates themessage“Coffee release failure”Failure to the release magnetFailure to the coffee dosemicroswitch<0}Failure to relay K 02After grinding and during the attempt of releasing the groundcoffee, the doser device plate triggers a microswitch thatsignals the coffee releaseIf such microswitch is not triggered, there could have beentwo causes:Failure to the release magnet or overheating protectiontriggered (resetting is automatic, and after approximately 5minutes it is reactivated, but the cause of such trigger mustbe identified).Failure to the microswitch: replace with an identical onedesigned for the Colibrì, in the event of using a microswitchwith different characteristics considerable discrepancies in theground coffee doses may occur.The display indicates themessage“Boiler failure”The boiler does not heatDry operation protectionsystem triggered.The machine is locked if after 10 minutes heating the settemperature is not reached.Check for the correct operation of the heating element, thethermostat, the probe and of the actuation triac.In the event of replacing the probe, the correct temperaturemust be re-adjusted using the trimmerThe display indicates themessage“No cups”No cups in the dispenserMicroswitch failureThe cup column does notrotateIf no cups were loaded when starting the machine, thecolumn rotation ratiomotor is activated to search for a fullcolumn and if no cups are found within a 60 sec “time-out”,indicated by the specific microswitch, the machine is locked.Excluding the fact of a real lack of cups, the correctmicroswitch functioning must be checked and in the event offailure they must be replaced with identical characteristicmicroswitches.If the ratiomotor is locked, the correct actuation of relays K21 and K 23 must be checked.The display indicates themessage“Espresso unit”The espresso unit failed toreposition.Failure to the lower deadcentre positioningmicroswitch.Failure to relay K 03Check for the correct operation of the lower dead centrepositioning microswitch.Check that the unit stops correctly at the upper dead centre(monitored via SW). If not replace the EPROM (programmingmay be necessary).The display indicates themessage“Volumetric counter”(flow-meter)The coffee dose is notreached within 60 sec.(The volumetric counter inthe Colibrì Instant model isused to measure also theinstant product doses).The water amount for both espresso coffee and instant drinkselections is ensured by a volumetric counter; with the waterflow a wheel rotates and through a sensor that sends anumber of pulses corresponding to the water doseprogrammed in the SW.If such dose is not reached within 60 sec it means that there