Set Appliance State:
| Isolate Mains Power to appliance as per TOPs P4 |
Set Multimeter to AC Volts 
Turn Hot Water Tap On
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 as necessary.
Once the appliance begins the sparking stage of its ignition sequence:
Test 1:
Measure the voltage between the brown
and blue wires at connector J3 on the ignition PCB.
Mains voltage expected.
Test 2:
Measure the voltage between the black
and blue wires at connector J3 on the ignition PCB.
Mains voltage expected.
Note:
Boiler will only attempt ignition once before going to lockout.
Reset as necessary until tests are complete.
Once the appliance begins the sparking stage of its ignition sequence:
Test 1:
Measure the voltage between the brown
and blue wires at connector J3 on the ignition PCB.
Mains voltage expected.
Test 2:
Measure the voltage between the black
and blue wires at connector J3 on the ignition PCB.
Mains voltage expected.
Note:
Boiler will only attempt ignition once before going to lockout.
Reset as necessary until tests are complete.
Isolate as per TOPs P4
and refit as necessary