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)
Remove fan connector from fan assembly and make safe
Remove fan connector from fan assembly and make safe
| WARNING! - Mains voltage is expected during test follow TOPs P4 live testing procedure |
Measurement:
Measure the voltage between the brown wire
on X8 to a suitable earth point.
Voltage should be approximately 28V DC.
on X8 to a suitable earth point.
Voltage should be approximately 28V DC.
Isolate as per TOPs P4
and refit as necessary