Set Appliance State:
| Isolate Mains Power to appliance as per TOPs P4 |
Set Multimeter to DC Volts 
DHW Demand
Remove control box cover if necessary
Gas On
| WARNING! - Mains voltage is expected during test follow TOPs P4 live testing procedure |
Measurement:
Allow fan to start.
After approximately 8 seconds measure voltage across the white wire on connector X36 and the neutral at the incoming mains terminal strip, with connector X36 attached to the PCB.
Expected voltage approximately 13 vdc
Note:
Voltage will only be present for approximately 1-3 seconds during the ignition phase, the appliance will try to ignite several times before going to lockout.
After approximately 8 seconds measure voltage across the white wire on connector X36 and the neutral at the incoming mains terminal strip, with connector X36 attached to the PCB.
Expected voltage approximately 13 vdc
Note:
Voltage will only be present for approximately 1-3 seconds during the ignition phase, the appliance will try to ignite several times before going to lockout.
Isolate as per TOPs P4
and refit as necessary