Set Appliance State:
| Isolate Mains Power to appliance as per TOPs P4 |
Set Multimeter to DC Volts 
Turn Hot Water Tap On
Gain access to PCB (use Insulation Mat as required)
Disconnect fan connector at the fan and make safe
Disconnect fan connector at the fan and make safe
| WARNING! - Mains voltage is expected during test follow TOPs P4 live testing procedure |
Measurement:
Test 1:
Measure the DC voltage between the white wire of the 6 way connector as illustrated and the main PCB neutral.
Expect approximately 16V DC.
Test 2:
Measure the DC voltage between the green wire of the 6 way connector as illustrated and the main PCB neutral.
Expect approximately 16V DC.
Are the voltages measured as expected?
Measure the DC voltage between the white wire of the 6 way connector as illustrated and the main PCB neutral.
Expect approximately 16V DC.
Test 2:
Measure the DC voltage between the green wire of the 6 way connector as illustrated and the main PCB neutral.
Expect approximately 16V DC.
Are the voltages measured as expected?
Isolate as per TOPs P4
and refit as necessary