Set Appliance State:
| Isolate Mains Power to appliance as per TOPs P4 |
Set Multimeter to DC Volts 
Disconnect connector from flow switch
| WARNING! - Mains voltage is expected during test follow TOPs P4 live testing procedure |
Measurement:
With the inline connector to the flow switch
disconnected repeat the previous test:
Measure the voltage between pin 6 (red) at X7
on the PCB to a suitable earth point.
Voltage should be approximately 12V DC.
disconnected repeat the previous test:
Measure the voltage between pin 6 (red) at X7
on the PCB to a suitable earth point.
Voltage should be approximately 12V DC.
Isolate as per TOPs P4
and refit as necessary