Siemens EH70S501E Instruction Manual - Page 28
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Visual
Fault
indication
o1
The power voltage is too
low.
o2/o3
The cooking zone has
overheated.
U400
The cooking hob is not
well connected.
Normal operating
noises for the
appliance
Low humming like a
transformer
Quiet whistling
Crackling
High pitched whistle
28
Measure
Deactivate the hob. Wait a few seconds before connecting
it again.
If the indication continues, contact your electricity
supplier.
It has been automatically deactivated to protect your hob.
Wait a few minutes for it to cool down and switch it back
on again.
Disconnect the cooking hob from the mains. Check the
connection and connect it again correctly.
If the indication continues, notify the technical assistance
service.
Induction heating technology is based on the vibration
resistance of certain metals when subjected to
high frequency waves. In some circumstances, these
vibrations can cause a certain degree of noise, such
as the following:
This occurs when cooking at a high power. The cause
of this is the amount of energy which is transmitted
from the hob to the cookware. This noise disappears
or becomes quieter when the power is turned down.
This occurs when the cookware is empty. This noise
disappears when water or food is added to the
cookware.
This noise occurs when cookware is used which
consists of layers of different materials. The noise is
caused by vibrations in the joint faces between the
different layers. This noise is made by the cookware. It
may change depending on the amount and type of
food being cooked.
This noise occurs principally in cookware which
consists of layers of different materials when it is used
at the highest heat setting and on two hotplates next
to each other. This whistling disappears or becomes
quieter when the power is turned down.