BWT besthead ST 3 - Trouble shooting; Order Numbers; Tables of Filter Capacities and Bypass Settings

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7 Trouble shooting
Error Cause Action
Filtered water cannot be
drawn
Water supply in general is
stopped or a valve is closed
Test all valves and open if necessary
Filter cartridge not screwed
properly into the filter head
Unscrew filter by ½ rotation and reinsert as
far as possible (Section 5.6)
Filter head fitted incorrectly Check flow direction according to the arrow
on the filter head and reverse flow direction
if necessary (Section 5.4)
Low water flow rate System pressure is too low Check system pressure (Section 4.4)
Aquastop in filter head
leaking while filter
cartridge is removed
Particles deposited in Aqua-
stop
Purge/flush filter system with mounted filter
cartridge (Section 5.6.1)
Threaded /screw
connection is leaking
Defective seal Check seal, replace if necessary
Air bubbles System not completely purged Repeat purging/flushing procedure (Section 5.6.1)
Turbid or white water Process-related formation of
small bubbles of carbonic acid
Turbidity vanishes after 5 minutes.
Heating element, boiler
in the appliance not
satisfactorily protected
against lime scale
Incorrect bypass setting, filter
cartridge capacity exceeded,
filter cartridge too small;
change in water hardness from
the water supplier.
Check carbonate hardness,
bypass setting and filter capacity.
Fit suitable filter cartridge if necessary.
8 Order numbers
Order Number
Filter cartridge bestmax X FS20I00A00 / 812110
Filter cartridge bestmax S FS22I00A00 / 812111
Filter cartridge bestmax V FS23I00A00 / 812115
Filter cartridge bestmax M FS24I00A00 / 812112
Filter cartridge bestmax L FS26I00A00 / 812113
Filter cartridge bestmax XL FS28I00A00 / 812114
Filter cartridge bestmax 2XL FS30I00A00 / 812116
Filter head besthead ST 3/8“ FS00Y90A00 / 812412
Filter head besthead PA 3/8“ FS00Y96A00 / 812414
Filter head besthead PA Ø 8 mm FS00Y95A00 / 812413
Filter head besthead FLEX FS00Z20A00 / 812420
9 Tables of filter capacities and bypass settings
The filter capacities and bypass setting depending on the carbonate hardness of the tap water are
listed in Tables T1 to T4 at the end of this installation and operating manual.