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)
| WARNING! - Mains voltage is expected during test follow TOPs P4 live testing procedure |
Measurement:
Test 1:
Measure the voltage between pin 7 (red) of X2
connector at the PCB to a suitable earth point.
Expected voltage approx. 5V DC.
Test 2:
Measure the voltage between pin 5 (white) of X2
connector at the PCB to a suitable earth point.
Expected voltage approx. 0V DC.
Measure the voltage between pin 7 (red) of X2
connector at the PCB to a suitable earth point.
Expected voltage approx. 5V DC.
Test 2:
Measure the voltage between pin 5 (white) of X2
connector at the PCB to a suitable earth point.
Expected voltage approx. 0V DC.
