Set Appliance State:
Mains Power Off
Set Multimeter to DC Volts 
| WARNING! - Mains voltage is expected during test follow TOPs P4 live testing procedure |
Measurement:
Measure voltage between the Black pin marked 15.2
and the Red pin marked 15.1 on X5 connector at the PCB.
Voltage should be approximately 9V DC.
Note:
This test can be carried out while
the boiler is completing its self check.
and the Red pin marked 15.1 on X5 connector at the PCB.
Voltage should be approximately 9V DC.
Note:
This test can be carried out while
the boiler is completing its self check.
Isolate as per TOPs P4
and refit as necessary