Set Appliance State:
| Isolate Mains Power to appliance as per TOPs P4 |
Set Multimeter to AC Volts 
CH Demand
Gain access to PCB (use Insulation Mat as required)
| WARNING! - Mains voltage is expected during test follow TOPs P4 live testing procedure |
Measurement:
Reset appliance if required.
(Press reset button once then release)
Measure the AC volts between the Brown (Live)
and the Blue (Neutral) wires on connector X18.
Expect a voltage fluctuating between 0 and 240 Vac approximately every 7 seconds.
Note:
If appliance enters lockout the fluctuating voltage will stop, reset appliance as necessary until test is complete.
(Press reset button once then release)
Measure the AC volts between the Brown (Live)
and the Blue (Neutral) wires on connector X18.
Expect a voltage fluctuating between 0 and 240 Vac approximately every 7 seconds.
Note:
If appliance enters lockout the fluctuating voltage will stop, reset appliance as necessary until test is complete.
Isolate as per TOPs P4
and refit as necessary