Set Appliance State:
| Isolate Mains Power to appliance as per TOPs P4 |
Set Multimeter to AC Voltage 
Turn Hot Water Tap On
Gain access to PCB (use Insulation Mat as required)
Selector switch in DHW position
Selector switch in DHW position
| WARNING! - Mains voltage is expected during test follow TOPs P4 live testing procedure |
Measurement:
Allow fan to run and ignition sequence to commence.
Measure the voltage across brown wire and blue wires
on connector X5 (marked GV) at the PCB.
Note:
Voltage will only be present for approximately 10 seconds, with no burner ignition lockout should occur. This can be reset by switching the mains power supply to the appliance OFF and ON again.
Measure the voltage across brown wire and blue wires
on connector X5 (marked GV) at the PCB.
Note:
Voltage will only be present for approximately 10 seconds, with no burner ignition lockout should occur. This can be reset by switching the mains power supply to the appliance OFF and ON again.
Isolate as per TOPs P4
and refit as necessary