Set Appliance State:

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

Measurement:

Measure voltage across terminal marked Lt, white wire (this is the 5th terminal from the bottom of the main terminal block) and the neutral terminal, blue wire (2nd terminal from bottom of the main terminal block).