18.0 Fault Finding

Fault Finding Solutions Sections

A

B

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:

NO

Check electrical supply

 

NO

Replace fuse

 

NO Check wiring

Display illuminated

NO

Replace PCB

C

1.

2.

1.

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

NO

Replace pump

NO Replace PCB

YES

Re-pressurise system

 

Check connection water pressure

 

 

 

 

switch terminal

 

 

 

 

 

YES

Replace water

COM - NO and PCB connector

 

 

 

pressure switch

X400 terminals 3,4

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

2.

Check the tap of the automatic air

NO

 

Open the automatic air vent

 

vent is opened

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

D1.

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

NO

YES

Fan jammed or faulty winding

Replace PCB

YES

Replace fan

© Baxi Heating UK Ltd 2008

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Baxi Potterton Gold HE A Range Is there 230V at Main terminals L and N Main terminal fuse, PCB X3 connector terminals 3