Set Appliance State:
Mains Power Off
Gas Off
Set Multimeter to DC Volts 
| WARNING! Mains voltage is expected during test, follow TOPs P4 live testing procedure |
Measurement:
Apply heating demand, allow fan to start
After 12 seconds voltage should be present at test points. Measure voltage across the black (neutral) and red(live) leads on connector at the gas valve.
Expected voltage approximately 200V DC
Voltage will only be present for approximately 4 seconds during the ignition phase the appliance will try to ignite a maximum of 5 times before going to lockout.
After 12 seconds voltage should be present at test points. Measure voltage across the black (neutral) and red(live) leads on connector at the gas valve.
Expected voltage approximately 200V DC
Voltage will only be present for approximately 4 seconds during the ignition phase the appliance will try to ignite a maximum of 5 times before going to lockout.
Isolate as per TOPs P4
and refit as necessary