EN-RATIOfresh-250-400_TI-MA-0809-11214900
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8. Troubleshooting
Table 15 Malfunction
Cause
Remedy
Hot water flow volume is
insufficient.
Shut-off valve in cold water supply
partially closed.
Check all shut-off valves and spigots and open completely.
Clogged cold water supply filter.
Shut off the cold water supply, remove filter, clean filter.
Lime buildup on heat exchanger.
Check the heat exchanger for lime buildup and decalcify if
necessary (see chapter 7).
No hot water.
Shut-off valve in cold or hot water
network closed.
Check all shut-off valves and spigots and open completely.
Water does not get hot.
Power outage or potable water station
without power.
Check whether the display of the potable water station is
illuminated.
Plug the power plug of the potable water station into the wall
socket.
Fuses defective.
Check fuses in controller of potable water station and replace if
necessary.
Primary circuit pump defective.
Check the function of the primary circuit pump (manual
operation).
Air within the primary circuit prevents
sufficient flow through the heat
exchanger.
Bleed the primary circuit (see chapter 5.2).
Flow through primary circuit
insufficient.
Check the entire primary circuit: Shut-off elements, power
supply, pump and controller settings.
Single-jet meter does not detect when
water is withdrawn.
Check the function of the single-jet meter (e.g. with acoustic
test of the pulse output using a multimeter).
Hot water temperature
is too low.
Incorrectly set nominal temperature.
Change the nominal hot water temperature.
Aux. heating temperature set too low.
Compare the set value with the recommendations in table 14
and correct as needed.
Incorrectly set power output level of
the primary circuit pump.
Compare the set value with the recommendations in table 14
and correct as needed.
Controller not yet adapted.
Carry out a controlled tapping (see chapter 5.6).
Air within the primary circuit prevents
sufficient flow through the heat
exchanger.
Bleed the primary circuit (see chapter 5.2).
Flow through primary circuit
insufficient.
Check the entire primary circuit. Shut-off elements, power
supply, pump and controller settings.
Hot water temperature
is too high.
Incorrectly set nominal temperature.
Change the nominal hot water temperature.
Primary circuit pump mode set
incorrectly.
Set the mode of the primary circuit pump to “Auto”.
Disinfection operating mode set
incorrectly (“On”).
Set the operating mode of the disinfection to “Auto”.
Incorrectly set disinfection start time.
Change the disinfection start time. Select a time outside of the
typical tapping times (e.g. at night).
Controller not yet adapted.
Carry out a controlled tapping (see chapter 5.6).
Incorrectly set power output level of
the primary circuit pump.
Compare the set value with the recommendations in table 14
and correct as needed.
Storage tank temperature temporarily
increased significantly due to solar
charging.
The potable water station automatically adjusts this next time
water is withdrawn.
Gravity circulation in primary circuit
(detectable only with brief tapping
events).
Check the setting of the gravity brake and possibly of the
hydraulics (e.g. in case of multiuse of the buffer cylinder
connections of the primary circuit).
Primary circuit temperature sensor
attached at incorrect position.
Check the position of the storage cylinder temperature sensor
and correct if necessary (see chapter 3.6).
