Set Appliance State:
Set Multimeter to AC Volts 
CH Demand
Isolate Mains Power to appliance as per TOPs P4
Gain access to PCB, use isolation mat as required.
Gain access to PCB, use isolation mat as required.
| WARNING! - Mains voltage is expected during test follow TOPs P4 live testing procedure |
Measurement:
Appliance On/Off control set to ON position.
Measure the voltage at the second terminal from the right marked LR (live) and the seventh terminal from the right marked N (neutral) at connector ST2 on the PCB.
Measure the voltage at the second terminal from the right marked LR (live) and the seventh terminal from the right marked N (neutral) at connector ST2 on the PCB.
Isolate as per TOPs P4
and refit as necessary