Halstead CFF80 Instructions For Use Installation And Servicing

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Halstead CFF80 Instructions For Use Installation And Servicing Manual pdf 23 page image

23 2000225008DIMPORTANT. On completion of the Fault Finding task whichhas required the breaking and remaking of the electricalconnections, the continuity, polarity, short circuit and resistanceto earth checks must be repeated using a suitable multimeter.WARNING. The multifunctional control and fan operate onmains voltage, the terminal will be live.9.1 ElectricalGain access to the control box, refer to the relevant paragraphin section 8.1, then remove the control box cover, refer tosection 5.1.Refer to: Boiler Fault Finding, see diagram 9.2, Fault FindingWiring Diagram, see diagram 9.3, Pictorial Wiring Diagram, seediagram 9.4.Diagram 9.2ELECTRICAL FAULT FINDING9917Check for 230V acbetween N and commoncontact on airpressure switch.With electrical supply isolated remove the boiler access door asdescribed in the relevant parts of section 8.1, to gain access to theair pressure switch. Switch on electrical supply Check for 230V acbetween N and normally closed contact of air pressure switch.Is there 230V ac betweenLs and NEnsure that any external controls are calling for heat and circuit water is cold.If neon 6 is lit flame failure has occured. Reset boiler by turning temperature control to Off,waiting 30 seconds and then on.If fault persists continue with fault finding below.Before carrying out fault finding, ensure that gas, electricity and water are available at the boiler.Is neon 1 lit? NO Check power supplyIs neon 2 lit? NOYESYESFaulty thermistor.Replace.With electrical supply isolateddisconnect the 2 waythermistor plug from the PCB.Check that there is a resistancebetween 14k - 2.5kOhms.Faulty PCB.Replace.Is neon 3 lit? Faulty PCB.Replace.YESNONOYESYESFaulty air pressureswitch. Replace.Does sparking take place(Listen for spark discharge.)? Faulty PCB.Replace. Check for 230V acbetween N and brownand between N and black,3 way connector on PCB.Faulty PCB.Replace.NONOCheck continuity ofgas valve harness.Faulty gas valve.Replace.Faulty harness.Replace.NOYESNOIs the fan turning?YES NO Is there 230Vacon fan?FaultyPCB.Faultyfan.Does burner light?YESYESYESYESNONOIs neon 4 lit? NOYESAppliance workingsatisfactorily.Is integrity ofelectrode andHT lead good?Replace asnecessaryFaultyPCB.YESNOYESNONO9 Fault FindingDiagram 9.1BOILER TEMPERATURECONTROL10169