Set Appliance State:

Isolate Mains Power to appliance as per TOPs P4
Set Multimeter to DC Volts Set meter to measure DC Volts
NO demand
Preheat switched OFF (ECO button illuminated)
Remove connector ST17 from PCB
WARNING! - Mains voltage is expected during test follow
TOPs P4 live testing procedure
Mains Power On

Measurement:

Test 1:
Measure the voltage across pin 2 at location ST17 on the PCB and DC neutral terminal.
Test 2:
Measure the voltage across pin 5 at location ST17 on the PCB and DC neutral terminal.
Expected voltage approximately 26V DC.