Set Appliance State:
| Isolate Mains Power to appliance as per TOPs P4 |
Set Multimeter to AC Volts 
Turn Hot Water Tap On
Remove connector from spark generator and make safe
Selector switch to DHW position
Selector switch to DHW position
| WARNING! - Mains voltage is expected during test follow TOPs P4 live testing procedure |
Measurement:
Reset as required. Allow fan to run and ignition sequence to commence.
Approximately 5 seconds after the fan starts measure the voltage between connections 26 (brown wire) and 25 (blue wire) at M4 on the PCB.
Mains voltage should be present.
Note:
Voltage drop will only be present for approximately 10 seconds,
boiler may go to lockout. Reset appliance and retest as necessary.
Approximately 5 seconds after the fan starts measure the voltage between connections 26 (brown wire) and 25 (blue wire) at M4 on the PCB.
Mains voltage should be present.
Note:
Voltage drop will only be present for approximately 10 seconds,
boiler may go to lockout. Reset appliance and retest as necessary.
Isolate as per TOPs P4
and refit as necessary