Set Appliance State:
| Isolate Mains Power to appliance as per TOPs P4 |
Set Multimeter to DC Volts 
Remove fan speed control connector from fan assembly and wedge it between the fan and the fan plastic cover as shown
Ensure NO demands are present
Ensure NO demands are present
| WARNING! - Mains voltage is expected during test follow TOPs P4 live testing procedure |
Measurement:
Measure for DC voltage across the yellow lead (removed fan connector) and terminal 2 (blue) neutral main terminal block.
Expected voltage 23 Vdc.
Expected voltage 23 Vdc.
Isolate as per TOPs P4
and refit as necessary