Set Appliance State:
| Isolate Mains Power to appliance as per TOPs P4 |
Set Multimeter to AC Volts 
Remove connector X2 (detection electrode lead) from the PCB
Ensure NO demands are present
Ensure NO demands are present
| WARNING! - Mains voltage is expected during test follow TOPs P4 live testing procedure |
Measurement:
Reset appliance if required (rotate selector switch to OFF position
for 4 seconds, then rotate back to DHW/CH position).
Measure for A/C voltage across X2 terminal and a suitable earth connection.
Expected voltage measured approximately 170 Vac.
for 4 seconds, then rotate back to DHW/CH position).
Measure for A/C voltage across X2 terminal and a suitable earth connection.
Expected voltage measured approximately 170 Vac.
Isolate as per TOPs P4
and refit as necessary