Baxi Potterton BBU 15 HE manual Condensate Pump runs, Clean condensate drain system, Replace fan

Page 36

Fault Finding Solutions Sections

12.0 Fault Finding

AIs there 230V at:

1.

 

 

 

NO

 

 

 

 

 

 

 

 

Main terminals L and N

Check electrical supply

 

 

 

 

NO

 

 

 

 

2.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Main terminal fuse

 

 

NO

 

Replace fuse

 

 

 

 

 

Display

 

 

 

 

 

 

 

 

 

 

3.

 

 

 

 

 

 

 

 

 

illuminated

 

 

 

 

 

 

 

 

 

PCB - X1 connector

 

Check wiring

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

terminals 1,2

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

BCheck all system wiring and pump

CService Reset

Condensate Pump does not run On Reset is there 230V at:

NO

Replace PCB

1.

PCB - X3 connector terminals 5 &

NO

 

6 for at least 2 seconds

 

 

 

 

 

 

 

 

 

 

 

 

2.

Condensate Pump terminals for at

NO

 

least 2 seconds

 

 

 

 

 

 

 

 

 

YES

 

 

 

 

 

 

 

 

 

 

YES

 

Condensate Pump runs

 

 

 

 

 

 

 

 

Replace PCB

Replace wiring

Replace Cond. Pump

Condensate drain system blocked

NO

Replace Float Switch

YES

Clean condensate drain system

D

E

 

Fan connections correct at fan. PCB -

YES

 

X2 connector, is 230V AC across

 

 

 

 

 

terminals 5 & 7

 

 

 

 

 

 

 

 

 

 

 

NO

 

 

 

 

 

 

 

 

 

 

 

 

E20 - Temperature sensor faulty.

 

 

 

Cold resistance approximately

 

NO

10kΩ @ 25° C

 

 

 

 

(resistance reduces with increase in temp.)

 

 

 

E28 - Incorrect PCBfitted

 

 

 

 

 

 

 

 

 

Fan jammed or faulty winding

Replace PCB

Replace sensor or PCB(E28)

YES

Replace fan

F 1.

Check and correct the connection of the tube between the venturi and gas valve

G

2.

 

NO

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Gas at burner

 

Ensure gas is on and purged

 

 

 

 

 

Replace PCB

 

 

 

 

 

 

 

 

NO

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

YES

 

 

 

 

 

 

 

 

 

 

 

 

PCB - X3 connector is 230V AC across

 

 

 

 

 

 

 

 

 

 

 

 

Replace gas valve

 

 

 

 

 

 

 

 

 

 

terminals 1 & 2

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

voltage at PCB - X2 connector is

 

NO

 

 

 

 

Check and correct if necessary

 

 

 

 

 

 

 

 

 

 

 

Replace PCB

 

1.

Ignition electrode and lead

 

 

YES

 

110V AC across terminals 2 & 5

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

(Note: from multimeter connect

 

 

 

 

 

 

 

2.

Electrode connection

 

 

 

 

 

YES

 

 

 

 

 

 

 

 

‘common’ to 2 & ‘volts’ to 5)

 

Replace igniter

 

3. Spark gap and position

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Check wiring

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

36© Baxi Heating UK Ltd 2009

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Contents
Baxi Bermuda BBU 15 HE 0086 Installer Notification Guidelines Scheme Members onlyImportant Installation, Commissioning, Service & Repair LegislationCodes of Practice, most recent version should be used Safe Manual Handling Contents Contents IntroductionDescription General Layout Layout FigFlue Kit 10m & 12.5m a Technical Data Bermuda HE Cbbu 15 HESystem Details Water Circulating SystemsTreatment of Water Circulating Systems There is a drain cock supplied in the plumbing kitPipework System ControlsStorage Systems Sealed Systems Figs , 7 Sealed Systems Site Requirements Builders Opening FigLocation Fireplace Opening & SurroundFlue No Horizontal Runs are PermittedVentilation Gas Supply FigElectrical Supply Fig Electrical Connection Gas ConnectionCondensate Drain General Condensate Disposal FigTotal volume of the sump is 1.5 litres Condensate DisposalCondensate Pump Operation From Boiler 500mm MinBoiler Internal Wiring Boiler Internal Illustrated Wiring DiagramInstallation Initial PreparationFlue System Barb ‘C’ Clip Air Cowl Air Duct Collar Ribs Terminal Cap Siting the Boiler Water ConnectionsGas Connection Electrical ConnectionCompletion & Commissioning CompletionCommissioning the Boiler Test Point Annual Servicing Annual ServicingAnnual Servicing Inspection Electrode Assembly Fig Changing ComponentsChanging Components Spark Generator FigFan Fig Burner FigSpark Generator Plug Electrode Fan Injector Burner Spark Generator Plug Gas Feed Pipe InjectorInjector Gas Valve Earth Wire Gas Valve FigSafety Thermostat Fig Float Switches FigPCB Fig NTC FigSetting the Gas Valve Setting the Gas Valve CO2 checkFlue Sampling Point Display Control Knobs Fault Finding Initial Fault Finding ChecksError Codes Error 110 flashing Burner lights Press the Service ResetSwitch for 5 seconds Go to section ‘A’Clean condensate drain system X2 connector, is 230V AC acrossTerminals 1 Voltage at PCB X2 connector is Spark gap and position Check wiringReplace Safety Thermostat Replace flame sensing electrode13.0 Short Parts List Short Parts ListPage Page Page GAS Boiler System Commissioning Checklist Service Record Date Energy Efficiency Checklist completed?Warranty & Service Serial Number Date of InstallationInstaller Details name, address and contact numbers After Sales Service 0844 871