KKT KOLBE KF5900IND Benutzerhandbuch Seite 55

Troubleshooting
Problem
Scratches on the
glass surface
Some pans or pots
make crackling or
clicking noises.
A slight humming
noise can be heard
when operating at high
power.
Fan noise
Possible cause
Metal abrasion or
other soiling may ap-
pear like scratches.
Unsuitable cookwa-
re is used.
Unsuitable cleaning
agents or utensils
are used.
This may be caused
by the construction
of your cookware
(layers of different
metals vibrating
differently).
This can be caused
by induction tech-
nology.
A cooling fan integ-
rated in the hob pre-
vents the electronics
from overheating.
If necessary,
it continues to run
even after the hob is
switched off.
What to do
Glass ceramic is more abrasion resis-
tant than steel. Abrasion marks caused
by this do not represent damage and
can be removed with an appropriate
cleaning agent.
Use cookware with a clean, even and
smooth bottom (see chapter on cook-
ware).
Only use cleaning agents and utensils
suitable for glass surfaces (see cleaning
chapter).
The metal layers of the cookware
vibrate differently when heated.
This is harmless and normal.
This is normal, but the noise should
quieten down or disappear completely
by reducing the power level.
This is normal and necessary for error-
free operation.
Do not disconnect the appliance from
the power supply while the fan is
running.
To avoid functional restrictions,
ensure that the ambient temperature
is appropriate and that there is good
ventilation.
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