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 blue (7) on connector X401 and earth as power reinstated.
Expect approximately 17Vdc for approximately 5 seconds.
Is the voltage measured as expected?
Note:
Repeat test as required, If fused spur is not located near appliance the boiler On/Off switch can be used.
Expect approximately 17Vdc for approximately 5 seconds.
Is the voltage measured as expected?
Note:
Repeat test as required, If fused spur is not located near appliance the boiler On/Off switch can be used.
Isolate as per TOPs P4
and refit as necessary