Set Appliance State:
| Isolate Mains Power to appliance as per TOPs P4 |
Set Multimeter to DC Volts 
CH Demand
Gain access to PCB (use insulation mat as necessary)
Use insulation mat as required
Use insulation mat as required
| WARNING! - Mains voltage is expected during test follow TOPs P4 live testing procedure |
Measurement:
Test 1:
Measure between the test pin for the red wire at J15 connector on the PCB and a suitable earth point.
Expected voltage above 28V DC.
Test 2:
Measure between the test pin for the green wire at J15 connector on the PCB and a suitable earth point.
Expected voltage approx. 1V DC.
Measure between the test pin for the red wire at J15 connector on the PCB and a suitable earth point.
Expected voltage above 28V DC.
Test 2:
Measure between the test pin for the green wire at J15 connector on the PCB and a suitable earth point.
Expected voltage approx. 1V DC.
