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:
Allow fan purge to complete (2 minutes).
Measure the DC voltage between each of the wires listed in the table below on connector X9 and a suitable earth, voltages should conform approximately to the table below:
Measure the DC voltage between each of the wires listed in the table below on connector X9 and a suitable earth, voltages should conform approximately to the table below:
| Pin | DC Volts | 1 | 29 |
| 2 | 29 |
| 3 | 29 |
| 4 | 29 |
| 5 | 29 |
| 6 | 29 |
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