Set Appliance State:

Mains Power Off
WARNING! - Mains voltage is expected during test follow
TOPs P4 live testing procedure
Mains Power On

Observation:

In addition to problems with the spark generator this fault can be displayed if power is interrupted at certain points in the ignition sequence, which may happen more often while you are working on the appliance.
Is the spark generator fault still displayed after power has been turned back off & on to the appliance?
SPARK GENERATOR FAULT CURRENTLY SHOWING - INVESTIGATE CAUSE
SPARK GENERATOR FAULT CLEARED - RETEST APPLIANCE