Set Appliance State:

Mains Power Off
No demands
WARNING! - Mains voltage is expected during test follow
TOPs P4 live testing procedure
Mains Power On

Observation:

ON/OFF switch ON
Does the display operate (i.e. shows information)?
Allow appliance to complete its 2 minute self check.
If a fault code is displayed during the self check you must click HERE and use the fault code diagnostics.