Set Appliance State:
| Isolate Mains Power to appliance as per TOPs P4 |
Set Multimeter to DC Volts 
Gain access to PCB (use Insulation Mat as required)
Remove the connector from the DHW flow turbine and make safe
Remove the connector from the DHW flow turbine and make safe
| WARNING! - Mains voltage is expected during test follow TOPs P4 live testing procedure |
Measurement:
Measure for DC voltage between pin 45 of connector CN2 and pin 4 of connector CN4.
Expected voltage approximately 4.9 Vdc.
Expected voltage approximately 4.9 Vdc.
Isolate as per TOPs P4
and refit as necessary