Gaggenau VG 442, Руководство по эксплуатации, техническому обслуживанию и установке

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After prolonged operation, the burners (burner
head cover, burner ring and burner head) will
become darker through natural oxidation. You
can remove this discoloration as follows:
Mix equal parts of white vinegar with a max. 8 %
acid (household vinegar) and warm water.
Soak the discolored burner parts for no longer than
10 minutes in the solution and remove stubborn
stains with a cloth or sponge.
Rinse the burner parts thoroughly in clear water and
dry completely before use.
Note: The surface will be damaged if the
solution is too concentrated or the burner
parts are left in vinegar for too long!
The appliance must be disconnected from the
power and gas supply during all repair work.
In the event of malfunctions, check whether the gas
and electricity supplies are in proper working
order.
The cooktop cannot be used during a power failure.
If the cooktop is being used when the power failure
occurs, the appliance automatically shuts off the
gas supply.
The cooktop will not turn back on after a power
failure. A signal is sounded. Turn the control knob to
the OFF position. Then you can operate the
appliance as usual.
Before calling the service engineer, check the
trouble-shooting guide on page 13 to see, if you can
rectify the problem yourself. If your appliance still
does not work, please contact your dealer or your
local Gaggenau customer service agency. Specify
the appliance type (see rating plate).
Repairs may only be carried out by authorised
technicians, in order to guarantee the safety of the
appliance.
Unauthorised tampering with the appliance will
invalidate any warranty claims.
Only use original spare parts.
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8. Maintenance