Potthof & Co 28kw Turn Domestic Hot Water, Open DHW tap fully, Close DHW tap, Burner modulates

Page 56

18.0 Fault Finding

Domestic Hot Water - Follow operational sequence

Turn selector switch to The display illuminates

YES

NO

Go to section ‘A’

	Error 110 flashing		YES
	Error 133 flashing
	NO
	Error 20, 28 or 50 flashing		YES
	Error 20, 28 or 50 flashing
	NO
	Error 119 flashing		YES
	Error 119 flashing
	NO
	Turn Domestic Hot Water
	thermostat to Maximum.
	Open DHW tap fully.
	DHW Hall Effect sensor		NO
	operated (red neon on the		NO
	operated (red neon on the
	sensor illuminated
	YES
	3-way valve is open to		NO
	Domestic Hot Water circuit
	YES		NO
	Pump runs		NO
	Pump runs
	YES
	Fan runs		NO
	Fan runs
	YES
	Fan runs at correct speed		NO
	Fan runs at correct speed
	YES
	Spark at ignition electrodes for		NO
	up to 5 seconds and for 3		NO
	up to 5 seconds and for 3
	attempts
	YES	NO
		NO

Turn the selector switch to reset position for 5 seconds

Go to section ‘E’

Go to section ‘C’

DHW flow rate more than 2

l/min

Go to section ‘K’

Error 125 flashing

Go to section ‘B’

Error 160 flashing

Go to section ‘D’

Error 160 flashing

Go to section ‘L’

Error 133 flashing

Go to section ‘F’

YES

YES

YES

If the error 110 is still flashing.

Go to section ‘J’

Go to section ‘B’

YES

Is mains water filter and

assembly clean?

Is the magnetic detector free

to move in the Hall Effect

sensor

Go to section ‘H’

Turn the selector switch to the

reset position for 5 seconds

Burner lights	YES
Burner lights
YES
Burner output modulates to	NO
Burner output modulates to
maintain the temperature set
YES	NO
YES
Close DHW tap
YES
DHW flow sensor senses no	YES
flow. Burner goes out

	Burner does not stay alights	YES
	after 5 seconds	NO


	Reduce DHW flow rate
	Reduce DHW flow rate
	Burner modulates


	Error 130 flashing
	Go to section ‘M’

Fan stops after 10 seconds	YES
Fan stops after 10 seconds

Error 133 flashing

Go to section ‘I’

Clean DHW NTC sensor and DHW heat exchanger

Pump runs for 30 seconds

YES

Operation sequence

successful

56© Baxi Heating UK Ltd 2012

Image 56

Contents Installation & Service Instructions Natural Gas Benchmark SchemeInstaller Notification Guidelines Scheme Members onlyCodes of Practice refer to the most recent version Important Installation, Commissioning, Service & RepairLegislation Safe Manual Handling GeneralPreparation TechniqueContents Description Contents of PackIntroduction General Layout LayoutExpansion Vessel Automatic Air Vent Circulation Pump Drain Off PointCentral Heating Mode Fig Domestic Hot Water Mode FigFrost Protection Mode Appliance OperationTechnical Data Gold Combi 24, 28 & 33 HE aDimensions and Fixings System Details InformationCentral Heating Circuit BypassExpansion Vessel Central Heating only Safety Pressure Relief Valve FigSystem Filling and Pressurising Fig Hard Water Areas Domestic Hot Water Circuit FigShowers Site Requirements LocationClearances Figs At leastSite Requirement Ventilation of CompartmentsGas Supply Electrical SupplyPer Pipe run Minimum FallPer Metre Run500mm min Minimum Fall50mm per Run Minimum fallPlume Displacement Kit FlueBelow windows or openings on pitched roofs 2000 Likely flue positions requiring a flue terminal guardFlue Options Total equivalent length = +B+C+2x90BendsTotal Equivalent Length = +B+C+1x90Bend Telescopic Flue inc. elbow Flue AccessoriesKey Accessory Size Code No Air Duct Connection Flue Duct Connection Boiler Adaptor Twin Flue Duct AdaptorTwin Flue Connection Flue Dimensions For Roof TerminalsFlue Trim Terminal Guard FigPlume Displacement Plume Displacement Kit Fig28/33 Determining Permissible LengthsExample Elbow30mm 50mmGeneral Fitting Notes Elbow to allow the flue to be installed as shown 60Ø extension piece. It must be secured using twoUsing a suitable bit e.g mm, drill through Extension and outlet. Secure using two of the screwsInstallation Unpacking & Initial PreparationFlushing After considering the site requirementsFitting the Filling Loop Kit Fitting the Safety Pressure Relief Discharge Pipe Fig Fitting The BoilerCondensate Drain see section Tighten all the connectionsFitting The Flue Wall Thickness Flue ElbowEnsure Elbow is fully engaged into Boiler Adaptor Wall Thickness Waste FlueEnsure Extension is fully engaged into Boiler Adaptor Inner Flue Support Bracket25mm Extension Cut End Terminal Block Cover Cable Clamp Making The Electrical ConnectionsPreliminary Electrical Checks Selector Switch Display CommissioningCommissioning the Boiler Screw Pump Automatic Air VentTemperature Control Selector Switch Display Temperature Control Gas Pressure Test Point Gas ValveCheck the Operational Working Gas Inlet Pressure It is necessary to set the boiler to ‘Calibration Mode’Setting the Timer Case Front Panel Facia Panel CompletionCompletion Annual Servicing Inspection Servicing13 .1 Annual Servicing Electrode Position 10 ±1Spark and Sensing Electrodes Fig Changing ComponentsIgniter Fig Fan Fig Venturi FigInjector Fig Gasket Venturi Injector Cover Gas Inlet Pipe Fan CollectorExtension Piece Burner FigInsulation Fig Central Heating Temperature Sensor NTC Fig Safety Thermostat FigDHW Temperature Sensor NTC Fig Flue/Heat Exchanger Thermostat Sensor FigAutomatic Air Vent Fig Pump Head Only FigPump Complete Fig Pressure Relief Valve Fig Pressure Gauge FigsHall Effect Sensor Fig Diverter Valve Motor Unit & Assembly Fig Plate Heat Exchanger FigSelector Switch Fig 14.22 P.C.B. FigGas Valve Fig Expansion Vessel FigSetting the Gas Valve Setting the Gas Valve CO2 checkFlue Adaptor Test Point Plug Analyser Probe CO2 should be 8.4% ± Reduce CO2Illustrated Wiring Diagram ElectricalShort Parts List Short Parts List426 315316 311 404419 422 400 415Error Codes Fault FindingInitial Fault Finding Checks Error 133 flashing Go to section ‘A’ Turn the selector switch toReset position for 5 seconds Pump runsError 133 flashing Go to section ‘I’ Turn Domestic Hot WaterOpen DHW tap fully Close DHW tapPCB X3 connector terminals 3 Switch terminalFan jammed or faulty winding Replace PCB Replace waterCheck wiring Viewing Window Replace sensor or PCB E28Gas at burner Replace gas valveReplace sensor Replace safety thermostatReplace PCB Is there 230V at Pages for Notes Pages for Notes GAS Boiler System Commissioning Checklist Service Record Potterton