Set Appliance State:
| Isolate Mains Power to appliance as per TOPs P4 |
Set Multimeter to DC Volts 
Gain access to PCB
Use insulation mat as required
Use insulation mat as required
| WARNING! - Mains voltage is expected during test follow TOPs P4 live testing procedure |
Measurement:
Ensure NO demands from external controls
Test 1:
Measure between the test pin for the red wire at J15 connector on the PCB and a suitable earth point.
Test 2:
Measure between the test pin for the green wire at J15 connector on the PCB and a suitable earth point.
Expected voltage above 20V DC on BOTH tests.
Test 1:
Measure between the test pin for the red wire at J15 connector on the PCB and a suitable earth point.
Test 2:
Measure between the test pin for the green wire at J15 connector on the PCB and a suitable earth point.
Expected voltage above 20V DC on BOTH tests.
Isolate as per TOPs P4
and refit as necessary