Set Appliance State:
Gas Off
| 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 |
Measurement:
Allow boiler self check to complete.
Hold down the service mode button for more than 5 seconds to enable service mode.
Measure the voltage across L and N on the green mains
connector (middle plug) for the pump.
Mains voltage expected.
Once test is completed press the service mode
button once to turn service mode off.
Hold down the service mode button for more than 5 seconds to enable service mode.
Measure the voltage across L and N on the green mains
connector (middle plug) for the pump.
Mains voltage expected.
Once test is completed press the service mode
button once to turn service mode off.
Isolate as per TOPs P4
and refit as necessary