Set Appliance State:

Turn Hot Water Tap On
WARNING! - Mains voltage is expected during test follow
TOPs P4 live testing procedure
Mains Power On

Observation:

Reset the appliance as necessary.
The appliance should now complete a self check of approx. 30 seconds.
Does the boiler ignite and run for a hot water demand or does the boiler go to Fault code E210/E9 as or just after fan reaches high speed?