Set Appliance State:
| 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)
| WARNING! - Mains voltage is expected during test follow TOPs P4 live testing procedure |
Measurement:
Reset the appliance if required.
(Press reset button once then release)
Allow the fan to run and the ignition sequence to commence.
Measure for mains voltage between pin 3 (brown) and
pin 4 (blue) on connector CN22 at the main PCB.
Mains voltage should be present for 5 seconds, this will then be present again after approximately 7 seconds. This will be repeated 3 times before lockout occurs, reset as required until test is complete.
(Press reset button once then release)
Allow the fan to run and the ignition sequence to commence.
Measure for mains voltage between pin 3 (brown) and
pin 4 (blue) on connector CN22 at the main PCB.
Mains voltage should be present for 5 seconds, this will then be present again after approximately 7 seconds. This will be repeated 3 times before lockout occurs, reset as required until test is complete.
Isolate as per TOPs P4
and refit as necessary