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11 Trouble-shooting
53
… the following displays flash alternately
and
… the clock is not running correctly
Possible cause
Solution
• An interruption in the
power supply.
➤
Cancel the error message by pressing the
button.
➤
Disconnect the power supply for
about 1 minute.
➤
Reconnect the power supply.
➤
If the error message appears again, note
down the error message in full along with
the
serial number (FN) (see identification plate).
➤
Disconnect the power supply.
➤
Call Customer Services.
Possible cause
Solution
• Irregular mains
frequency.
➤
Switch off the mains synchronisation.
When mains synchroni-
sation is switched off:
• internal pulse generator is
imprecise.
➤
Call Customer Services.
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