- EN -
Remedy of faults
Malfunction
Unit does not run
The unit does not deliver any air or the amount
delivered is insufficient
Unit is unusually loud
Maintenance and cleaning
Replace air filter
• Remove protective cover (Figure F, 8).
• Remove and replace air filter (9).
• Refit protective cover (8) and let it engage.
Replace membranes
Attention! Dangerous electrical voltage.
Possible consequences: Death or serious injuries.
Protective measures: Always switch the unit voltage free and secure against switching on again prior to
working on the unit.
Never operate the unit with defective membranes. Even when only one membrane is defective, always replace the
complete pair. The procedure is identical (Figure G-J). Please contact your specialist dealer if you do not wish to un-
dertake the replacement yourself.
• Undo screws (10) and remove the upper section of the housing (11) from the bottom section of the housing (12).
• Undo screws (14) on valve unit (15). Lay the screws aside separately from the other screws.
• Tilt valve unit (15) to the side.
• Remove screws (16) including washer (17) from support disk (18).
• Pull off support disk (18) including cover patch (19).
• Remove membrane socket (21).
• Press on membrane (20) to release it out of membrane socket (21).
• Insert new membrane(s).
• Reassemble the unit in the reverse order.
Storage/Over-wintering
When the unit is in continuous operation it can remain in place at freezing temperatures.) Otherwise store the unit in-
doors in a dry room (room temperature).
Wear parts
Air filters, valve unit and membranes are wear parts and, therefore, are not covered by our warranty.
Disposal
Do not dispose of this unit with domestic waste! For disposal purposes, please use the return system provided.
Disable the unit beforehand by cutting off the cables.
10
Cause
No mains voltage
The regulating valves are completely or par-
tially closed
The regulating valves are soiled
The aeration stones are soiled
The air filter is soiled
Membrane defective
Valve unit or membrane defective
Remedy
Check mains voltage
Open the regulating valves
Clean the regulating valves
Clean the aeration stones
Replace air filter
Replace membranes
Replace valve unit or membrane