Set Appliance State:

Access level 2 diagnostics as in the previous test.
WARNING! - Mains voltage is expected during test follow
TOPs P4 live testing procedure
Mains Power On

Observation:

Sometimes the software can show a fault despite the DS number being correct. This is usually after the PCB has just been changed.
Change the DS number to an incorrect number pressing + or - to select then press and hold MODE for 5 seconds to confirm.
Re-enter diagnostic number 93 and change the DS number back to the correct number, press and hold MODE for 5 seconds to confirm.
Reset the appliance.
Does the appliance now enter standby or does the fault code reoccur?