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13 Trouble-shooting
…the appliance makes noises during operation
Possible cause Solution
▪ The appliance may emit
noise when operating (e.g.
switching and pumping
noises).
Such noise is normal.
… the clock is not running correctly
Possible cause Solution
▪ Irregular mains frequency
▸ Switch off the mains synchronization.
▪ Internal pulse generator is
imprecise when mains syn-
chronization is switched
off.
▸ Call Customer Services.
...the following appears in the display
FX/EXX see operating instructions
FN XXX XXXXXX
Possible cause Solution
▪ Various situations can lead
to an error message.
▸ Cancel the error message by pressing the
touch button.
▸ Disconnect from the power supply for
about1minute.
▸ Reconnect the power supply.
▸ If the error appears again, note down the er-
ror message in full along with the serial num-
ber (FN; see identification plate).
▸ Disconnect from the power supply.
▸ Call Customer Services.
75
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