21
EN
Fault
Cause
Removal
Minimal or no flow rate
AQA therm HFB-1717 BA not
mounted in the direction of the
flow rate
Mount the AQA therm HFB 1717
BA in the direction of the flow
rate (see the arrow direction on
the housing)*
Shut-off ball valve not fully open
Fully open the shut-off ball valve
Pressure reducer not set at the
required outlet pressure
Set outlet pressure
Integrated filter is dirty
Clean the filter*
Drain valve opens for no reason
(no fluctuation in inlet pressure)
Inlet-side backflow preventer or
drain valve is dirty
Remove backflow preventer core
and clean or replace*
Drain valve does not close
Drain valve is dirty
Remove backflow preventer core
and clean or replace*
Water leaking from the spring
cap
Diaphragm valve core defective Insert valve core*
The set outlet pressure does not
remain constant
Nozzle or gasket valve dirty or
damaged
Replace valve core*
Water not hard enough
Incorrect setting of the hardness
range
Set the correct hardness range
AQA therm hardness-reducing
cartridge (HRC) or desalination
cartridge (SRC) depleted
Replace (HRC, SRC) cartridge
with a new one*
Impurities have entered the
mixing inlets
Flush (HRC, SRC) cartridge
11. Faults/Troubleshooting
* Note: the corrective measures marked with * must be carried out by an installation company or by BWT’s service team.
Should the corrective measures listed above fail to achieve the desired result, please contact an installation company or
BWT’s service team.
Description
Item no. Austria
Item no. Germany
AQA therm HFB-1717 backflow preventer using BA
810427
1-904115
AQA therm HFB-1717 pressure reducer using BA
081428
1-904792
AQA therm HRC S hardness-reducing cartridge
0.75 l
812523
12523
AQA therm HRC L hardness-reducing cartridge
3.5 l
812524
12524
AQA therm SRC L salt-reducing cartridge
3.5 l
812526
12526
AQA therm SRC XL salt-reducing cartridge
6.5 l
812510
12510
HES water meter
810426
1-904793
AQA therm distilled water filling nozzle
084959
1-904794
AQA therm HES filling adapter
084958
11796
Pressure gauge pressure reducer (HFB)
082428
1-904795
12. Replacement parts / Acccessories
6280_EBA AQA therm HFB_HES_HWG_313660-5.indd 21
24.09.15 09:09
