Set Appliance State:
| Isolate Mains Power to appliance as per TOPs P4 |
Set Multimeter to DC Volts 
CH Demand
Gain access to PCB (use insulation mat as required)
Pull connector X3 back slightly to expose test points
Pull connector X3 back slightly to expose test points
| WARNING! - Mains voltage is expected during test follow TOPs P4 live testing procedure |
Measurement:
Reset appliance as necessary.
Measure the voltage between pin 3 (black) and pin 2 (blue) at X3 on the PCB.
At 15 second intervals 215V DC should be measured
for 4 seconds as power is sent to the gas valve, this
will be repeated 5 times until lockout occurs.
Is the voltage measured as expected?
Notes:
1. Timings / voltages quoted are approximate.
2. Reset appliance and repeat test as necessary until outcome is determined.
Measure the voltage between pin 3 (black) and pin 2 (blue) at X3 on the PCB.
At 15 second intervals 215V DC should be measured
for 4 seconds as power is sent to the gas valve, this
will be repeated 5 times until lockout occurs.
Is the voltage measured as expected?
Notes:
1. Timings / voltages quoted are approximate.
2. Reset appliance and repeat test as necessary until outcome is determined.
Isolate as per TOPs P4
and refit as necessary