15
GB
Fault
Cause
Corrective action
No or too little flow
AQA therm HFB-1717 BA not
mounted in the flow direction
Mount the AQA therm HFB
1717 BA in the flow direction
(observe direction of arrow on
the casing)*
Shut-off ball valves not complete-
ly open
Completely open shut-off ball
valves
Pressure regulators not set to the
desired back pressure
Set the back pressure
Integrated dirt trap contaminated Clean the dirt trap*
Outlet valve opens for no reason
(no pre-pressure fluctuation
Inlet side backflow inhibitor or
outlet valve contaminated
Dismantle, clean or replace the
cartridge insert*
Drain valve does not close
Drain valve contaminated
Dismantle, clean or replace the
cartridge insert*
Water seeping from the spring
cap
Membrane valve insert defective Attach a valve insert*
Adjusted back pressure remains
irregular
Nozzles or gasket valves conta-
minated or damaged
Replace valve insert*
Water does not have the desired
hardness
Mixing device incorrectly
adjusted
Adjust softening
AQA therm hardness-reducing
cartridge (HRC) or salt-reducing
cartridge (SRC) spent
Exchange cartridge (HRC, SRC)
for a new one*
Trapped dirt particles in the
mixing unit openings
Exchange cartridge (HRC, SRC)
for a new one*
Flush cartridge (HRC, SRC)
11. Faults/finding faults
* Note: the corrective measures marked with a * must be carried out by an installation company or by the
BWT customer service team. If the above-mentioned corrective measures do not achieve the desired outcome, an
installation company or the BWT customer service team must be commissioned with this task.
Description
Item number
AQA therm HFB-1717 BA System Separator
810427
AQA therm HFB-1717 BA Pressure Regulator
810428
AQA therm HRC S Hardness-Reducing Cartridge
0.75 l
812523
AQA therm HRC L Hardness-Reducing Cartridge
3.5 l
812524
AQA therm SRC L Hardness-Reducing Cartridge
812526
AQA therm HES Water Meter
810426
Fig. 270 D 1/4" Softening Valve
880596
12. Spare parts/accessories
3329_EBA_AQA therm HFB/HES NEU.indd 15
29.02.12 10:34
