Set Appliance State:
Set Multimeter to DC Volts 
CH Demand
Isolate Mains Power to appliance as per TOPs P4
Gain access to PCB
Use insulation mat as required
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 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.
