In Case Of Fault - Zehnder Nova NEO Mode D'emploi

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4. In case of fault

If the fans stop working, check that your appliance is properly connected
to an appropriate power supply (see section 1.2).
The alarm LED (5) lights up when a fault is detected and goes out when
the fault is cleared (see section 2.1). If the LED remains on, further action is
required: contact your installer or dealer.
Note: if the power cable is damaged, for safety reasons it must be replaced
by the manufacturer, the manufacturer's after-sales service department or a
similarly qualified person.
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In case of fault 13