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Maintenance
6.3
Fault rectification
Possible faults are described below:
Description of the fault.
y Possible cause.
☞ Remedy.
The fan does not work.
y No power supply.
☞ Check that the all-pole mains switch is connected.
☞ Switch the mains switch on.
y The breaker may have been tripped or is defective.
☞ Check to see if the breaker has tripped.
☞ If you use electric circuit breakers, turn the circuit
breaker on again.
☞ For other types of fuse, consult a qualified electrician.
y The device is not switched on.
☞ Check all power levels.
D "4.3 Normal operation" (page 75).
y The ventilation flaps are closed.
☞ Open at least one ventilation flap.
D "4.3 Normal operation" (page 75).
y The device is connected to a window contact switch and
the window is closed.
☞ Open the window.
y The device is connected to an under-pressure monitor.
The under-pressure monitor detects a critical under-
pressure.
☞ Open a window.
☞ Wait until the air pressure returns to normal.
Smells occur during operation.
y The filter filling is used up.
☞ Change the filter filling.
D "6.2 Maintenance" (page 80).
Poor device performance.
y The grease filter in the filter box is blocked.
☞ Clean the cleaning unit.
D "5.2 Cleaning procedures" (page 77).
y The recirculated air filter is clogged.
☞ Replace the filter filling of the recirculated air filter.
D "6.2 Maintenance" (page 80).
y The exhaust pipe was not properly connected or installed.
☞ Please consult your dealer or customer services.
4600947_a – 05.10.2017
Control panel does not react after being touched several times.
y The control panel is soiled.
☞ Clean the control panel.
D "5. Cleaning" (page 77).
y The device software requires a restart.
☞ Briefly disconnect the mains power supply.
Moisture in the device.
y Dripping or splashing water has penetrated the device.
y Liquid (e.g. from vases, bottles on the device) has
penetrated the device.
☞ Immediately shut off the power supply, by removing
the fuse.
☞ Make sure that the power supply cannot be
unintentionally reconnected. For example by tasking
a person with ensuring that the fuse/breaker is not
restored/switched on.
☞ Ensure that no more liquid can penetrate the device.
☞ Allow the device to dry.
☞ Have the device checked and repaired by qualified,
specialist personnel prior to using the device again.
If a fault persists:
☞ Please consult your dealer or customer services.
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