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)
| WARNING! - Mains voltage is expected during test follow TOPs P4 live testing procedure |
Measurement:
Test 1.
During the initial 8 seconds (approx) of the self test, measure for DC voltage across pin 2 (white) on connector CN31 to a suitable earth point.
Expected voltage approx. 8VDC, returning to approx. 1.6VDC after the initial 8 seconds (approx) of the self test.
Test 2.
Power off the appliance, wait 5 seconds then reinstate the power, repeat Test 1 across pins 3 (red) 4 (black) and 5 (brown)
Expected voltages as per Test 1.
Note.
Repeat as required until tests are complete.
During the initial 8 seconds (approx) of the self test, measure for DC voltage across pin 2 (white) on connector CN31 to a suitable earth point.
Expected voltage approx. 8VDC, returning to approx. 1.6VDC after the initial 8 seconds (approx) of the self test.
Test 2.
Power off the appliance, wait 5 seconds then reinstate the power, repeat Test 1 across pins 3 (red) 4 (black) and 5 (brown)
Expected voltages as per Test 1.
Note.
Repeat as required until tests are complete.
Isolate as per TOPs P4
and refit as necessary