Set Appliance State:

Isolate Mains Power to appliance as per TOPs P4
CH Demand
Attach temperature probe to flow pipe at the bottom left of the combustion chamber
(flow pipe is pipe WITHOUT sensor attached at bottom left)
WARNING! - Mains voltage is expected during test follow
TOPs P4 live testing procedure
Mains Power On

Observation:

Cancel purge cycle & if required, reset boiler.
Run the appliance and allow the system to heat.
Monitor the boiler flow temperature.
Boiler flow temperature should reach approximately 80°C then maintain
flow temperature or shut down without going to the A02 fault code.
Please choose from one of the options below:
Note: To speed up the process the heating load can be reduced by turning off some radiators.