Set Appliance State:

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

Observation:

Confirm the boilers DSN is set correctly.
Refer to the table opposite for the required DSN.
This is diagnostic code "D.093".
Click HERE for guidance on how to enter and adjust the diagnostic codes, alternatively refer to Adapt for further guidance.
Is the Device Specific Number (DSN) set up correctly ?