Webasto HL 90 Notice D'utilisation Et D'entretien page 21

The heater must:
GB
20
be operated with the fuel specified on the rating
plate and at the nominal voltage specified on the
rating plate.
be switched off if considerable quantities of
smoke are generated, in case of unusual
combustion noises or if you smell fuel. Switch it
off by removing the fuse. The heater must not be
restarted until the unit has been checked by
personnel duly trained by Webasto.
be checked by a specialist at the latest at the start
of the heating period.