Set Appliance State:
| Isolate Mains Power to appliance as per TOPs P4 |
Set Multimeter to AC Volts 
CH Demand
Gain access to PCB (use Insulation Mat as required)
| WARNING! - Mains voltage is expected during test follow TOPs P4 live testing procedure |
Measurement:
Measure for AC voltage across pin 1 of connector X14 and a suitable earth connection.
Expect voltage 240Vac (mains voltage).
Note.
1. It may take approximately 40 seconds for the boiler to recognise a demand, this will depend upon the boiler status.
(Status code guidance CLICK HERE)
2. Ensure a good connection is made on connector X14.
Expect voltage 240Vac (mains voltage).
Note.
1. It may take approximately 40 seconds for the boiler to recognise a demand, this will depend upon the boiler status.
(Status code guidance CLICK HERE)
2. Ensure a good connection is made on connector X14.
Isolate as per TOPs P4
and refit as necessary