Set Appliance State:
| Isolate Mains Power to appliance as per TOPs P4 |
Set Multimeter to AC Volts 
Gain access to PCB (use Insulation Mat as required)
| WARNING! - Mains voltage is expected during test follow TOPs P4 live testing procedure |
Observation:
Reset boiler as necessary and allow boiler to complete its self-check.
Activate test t1 in boiler settings.
Click here for information on setting boiler test modes.
Measure the voltage across pin 1 (red) and pin 2 (blue)
on connector HV2 at the PCB.
Mains voltage expected.
Note:
Once the test begins voltage will be present for approx 2½ minutes.
It make take up to 10 seconds after activating t1 for the test to start.
Activate test t1 in boiler settings.
Click here for information on setting boiler test modes.
Measure the voltage across pin 1 (red) and pin 2 (blue)
on connector HV2 at the PCB.
Mains voltage expected.
Note:
Once the test begins voltage will be present for approx 2½ minutes.
It make take up to 10 seconds after activating t1 for the test to start.
