Set Appliance State:

Mains Power Off
Gas Off
Set Multimeter to AC Volts Set meter to measure AC Volts
WARNING! Mains voltage is expected during test, follow TOPs P4 live testing procedure
Mains Power On

Measurement:

Measure the voltage at the connection marked L (brown lead) and connection marked N (blue lead) on the main terminal block located on the back of the electrical door assembly.