Switch terminal

18.0 Fault Finding

Fault Finding Solutions Sections

Is there 230V at:

1.Main terminals L and N

2.Main terminal fuse

3.PCB - X1 connector terminals 1,2

Is there 230V at:

Check electrical supply

Replace fuse

Check wiring

Display illuminated

Replace PCB

Pump	YES	If pump jammed, release

PCB - X3 connector terminals 3 & 4

YES

Change pump supply cable

CH system pressure less than 0.5 bar

NO	Replace pump

NO	Replace PCB

YES	Re-pressurise system

Check connection water pressure
switch terminal
switch terminal	YES	Replace water
COM - NO and PCB connector		pressure switch
X400 terminals 3,4		pressure switch

2.	Check the tap of the automatic air	NO
2.	Check the tap of the automatic air	NO	Open the automatic air vent
	vent is opened		Open the automatic air vent

D 1.

Fan connections correct at fan. PCB - X2 connector, is 230V AC across terminals 5 & 7

YES

Fan jammed or faulty winding

Replace PCB

YES

Replace fan

Page 54

Image 54

Baxi Potterton Condensing Combination Boiler PCB X3 connector terminals 3, Switch terminal, Replace water, Replace fan

Condensing Combination Boiler specifications

The Baxi Potterton Condensing Combination Boiler is a sophisticated heating solution designed to meet the demands of modern households while promoting energy efficiency. This state-of-the-art boiler combines both heating and hot water capabilities into a compact unit, making it an ideal choice for homes with limited space.

One of the standout features of the Baxi Potterton Condensing Combination Boiler is its impressive energy efficiency. With a high energy efficiency rating, these boilers can significantly reduce energy bills and minimize carbon footprints. The condensing technology maximizes heat recovery, allowing the boiler to utilize heat that would otherwise be lost in traditional systems. By extracting more energy from the combustion process, homeowners can enjoy reliable heating and hot water without the typical energy waste associated with older boilers.

The Baxi Potterton range is engineered for easy installation and maintenance, featuring a lightweight design that simplifies the fitting process. The built-in digital control system allows homeowners to easily adjust settings for optimal comfort and energy usage. Additionally, the boiler includes a frost protection feature, making it a reliable option for homes in colder climates.

Another key characteristic of the Baxi Potterton Condensing Combination Boiler is its powerful hot water delivery system. The combination boiler provides instant hot water on demand, eliminating the need for a separate water tank. This ensures that households have a constant supply of hot water for showers, cooking, and other domestic needs, without long wait times.

Safety is a top priority with the Baxi Potterton. The boiler is equipped with multiple safety features, including pressure relief valves and safety cut-off systems, ensuring peace of mind for homeowners. The compact design further includes a quiet operation feature, which is particularly beneficial for households where noise levels need to be kept to a minimum.

In summary, the Baxi Potterton Condensing Combination Boiler is a highly efficient, compact, and user-friendly solution for home heating and hot water needs. With its advanced technology and strong emphasis on safety, it stands out as a reliable choice for modern households looking to improve energy efficiency while maintaining comfort. Whether you are replacing an old boiler or installing a new system, the Baxi Potterton offers a perfect blend of practicality and innovation.

Contents

Installation & Service Instructions 0086 Installer Notification Guidelines Scheme Members only Important Installation, Commissioning, Service & Repair LegislationCodes of Practice refer to the most recent version Preparation Safe Manual HandlingGeneral Technique Contents Description Contents of PackIntroduction Optional Extras General Layout Layout Frost Protection Mode Central Heating Mode FigDomestic Hot Water Mode Fig Appliance Operation Technical Data Heatmax Combi 24, 28 Dimensions and Fixings Central Heating Circuit System DetailsInformation Bypass Safety Pressure Relief Valve Fig System Filling and PressurisingExpansion Vessel Central Heating only Domestic Hot Water Circuit Fig ShowersHard Water Areas Site Requirements LocationClearances Figs Gas Supply Site RequirementVentilation of Compartments Electrical Supply Condensate Drain 50mm per 500mm min Run Minimum fall Below windows or openings on pitched roofs 2000 Plume Displacement KitFlue Likely flue positions requiring a flue terminal guard Horizontal Flue Systems Flue OptionsHorizontal Flues This bend is equivalent to 1 metre Roof Terminal This bend is equivalent to 1 metre Vertical FluesVertical Flue Systems Metre for each 91.5 bend Metre for each 135 bend Flue Accessories Key Accessory Size Code No Flue Trim Flue DimensionsFor Roof Terminals Terminal Guard Fig Plume Displacement Plume Displacement Kit Fig Example 28/33Determining Permissible Lengths 5121368 General Fitting Notes 30mm Using a suitable bit e.g mm, drill through Elbow to allow the flue to be installed as shown60Ø extension piece. It must be secured using two Extension and outlet. Secure using two of the screws Flushing InstallationUnpacking & Initial Preparation After considering the site requirements Fitting The Boiler Condensate Drain see section Ensure Elbow is fully engaged into Boiler Adaptor Fitting The FlueWall Thickness Flue Elbow WasteY Flue Inner Flue Support Bracket 25mm Extension Cut EndEnsure Extension is fully engaged into Boiler Adaptor Making The Electrical Connections Preliminary Electrical ChecksTerminal Block Cover Cable Clamp Commissioning Commissioning the Boiler Selector Switch Display Check the Operational Working Gas Inlet PressureGas Valve Completion CompletionCase Front Panel Facia Panel Servicing Annual ServicingAnnual Servicing Inspection Fan, Collector and Cover Assembly Threaded Bush Electrode Leads Venturi InjectorRestricter Filter Hall Effect Sensor Changing Components Igniter FigSpark and Sensing Electrodes Fig Injector Fig Fan FigVenturi Fig Gasket Venturi Injector Cover Gas Inlet Pipe Fan Collector Burner Fig Insulation Fig DHW Temperature Sensor NTC Fig Central Heating Temperature Sensor NTC FigSafety Thermostat Fig Flue/Heat Exchanger Thermostat Sensor Fig Pump Head Only Fig Pump Complete FigAutomatic Air Vent Fig Pressure Gauge Figs Hall Effect Sensor Fig Diverter Valve Motor Unit & Assembly Fig Plate Heat Exchanger Fig Selector Switch Fig 14.22 P.C.B. Fig Gas Valve Fig Expansion Vessel Fig Setting the Gas Valve Setting the Gas Valve CO2 check Illustrated Wiring Diagram Electrical 306 Short Parts ListShort Parts List 302 Fault Finding Initial Fault Finding ChecksError Codes Reset position for 5 seconds Error 133 flashingGo to section ‘A’ Turn the selector switch to Pump runs Open DHW tap fully Error 133 flashing Go to section ‘I’Turn Domestic Hot Water Close DHW tap Fan jammed or faulty winding Replace PCB PCB X3 connector terminals 3Switch terminal Replace water Replace gas valve Replace sensor or PCB E28Gas at burner Terminals 1 Replace safety thermostat Replace PCB Is there 230V atReplace sensor Page GAS Boiler System Commissioning Checklist Service Record Brooks House, Coventry Road, Warwick. CV34 4LL

Baxi Potterton Condensing Combination Boiler manual PCB X3 connector terminals 3, Switch terminal

Models: Condensing Combination Boiler

18.0 Fault Finding

Fault Finding Solutions Sections

PCB - X3 connector terminals 3 & 4

Replace water

Fan jammed or faulty winding

Replace PCB

Replace fan

Condensing Combination Boiler specifications