Set Appliance State:
| Isolate Mains Power to appliance as per TOPs P4 |
Set Multimeter to AC Volts 
Turn Hot Water Tap On
Use Insulation Mat as required
Gain access to the PCB
Gain access to the PCB
| WARNING! - Mains voltage is expected during test follow TOPs P4 live testing procedure |
Measurement:
Allow boiler to fire for DHW then measure the voltage
between pins 1 (Blue) and 2 (Brown) of plug X13.
Expect mains voltage.
Note:
The colour of the wires may vary as there are different harnesses
through the boiler production but test points will remain the same.
between pins 1 (Blue) and 2 (Brown) of plug X13.
Expect mains voltage.
Note:
The colour of the wires may vary as there are different harnesses
through the boiler production but test points will remain the same.
Isolate as per TOPs P4
and refit as necessary