Observation:

When a new main PCB is fitted, certain parameters need to be inspected and reconfigured accordingly. Failure to do so will result in the appliance operating incorrectly.
Therefore if a new PCB has been fitted please inspect and reconfigure the parameters specified below before carrying on with a diagnosis.
The correct parameter values are PCB software version number dependant, the software version number will appear on the display when the appliance power is turned on.
For the correct parameter values, refer to the software version tables in ADAPT, usually located in the 'other' section.
Click here for a guide on how to access and modify the boiler configuration parameters (b parameters)
Click here for a guide on how to access and modify the transparent parameters (P parameters)
Parameters that require configuring after a new PCB is fitted:
b01 - Gas type selection
b02 - Boiler type
b04 - DHW Maximum fan speed
b05 - CH Maximum fan speed
b06 - Minimum fan speed
b10 - Summer / winter selection
b20 - Fan type selection
b22 - Hydraulic block type
b23 - Flow meter type
P01 - Ignition level
P06 - CH pump function
P26 - Heat exchanger temperature protection