Set Appliance State:
Gas Off
| 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)
Temperature control set to MAX
Temperature control set to MAX
| WARNING! - Mains voltage is expected during test follow TOPs P4 live testing procedure |
Measurement:
Reset appliance as necessary.
Allow boiler to complete its self check and ignition sequence to begin.
Approximately 3 seconds after the fan begins to run measure
the voltage across the red wire on X10 marked 10.1 and the
blue wire on X11 marked 10.2
Mains voltage expected.
Note:
1. Voltage will only be present during the sparking stage of the ignition sequence.
2. Identification numbers for the wiring connections are located on the PCB.
Allow boiler to complete its self check and ignition sequence to begin.
Approximately 3 seconds after the fan begins to run measure
the voltage across the red wire on X10 marked 10.1 and the
blue wire on X11 marked 10.2
Mains voltage expected.
Note:
1. Voltage will only be present during the sparking stage of the ignition sequence.
2. Identification numbers for the wiring connections are located on the PCB.
Isolate as per TOPs P4
and refit as necessary