Set Appliance State:
| Isolate Mains Power to appliance as per TOPs P4 |
Set Multimeter to DC Volts 
Disconnect the fan lead connector from the fan
The molex connection has a tag lock that has to be depressed to remove the connector from the fan. This may prove difficult with the fan in situ so it may be easier to disconnect the fan from the venturi housing to gain access to the connector
The molex connection has a tag lock that has to be depressed to remove the connector from the fan. This may prove difficult with the fan in situ so it may be easier to disconnect the fan from the venturi housing to gain access to the connector
| WARNING! - Mains voltage is expected during test follow TOPs P4 live testing procedure |
Measurement:
Check for voltages at the disconnected plug across the leads listed below:
| Test | Leads | Expected Voltage DC |
| 1. | Orange & Brown | 3 to 9 |
| 2. | Blue & White | 3 to 9 |
| 3. | Brown & Blue | 36 |
| 4. | Brown & Black | 36 |
Isolate as per TOPs P4
and refit as necessary