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EN-RATIOfresh-250-400_TI-MA-0809-11214900
Table 15 Malfunction
Cause
Remedy
Circulation system heating
is insufficient.
Circulation pump defective.
Check the function of the circulation pump (manual operation).
Shutoff elements closed.
Check all shutoff valves and cocks and open completely.
Air in circulation system.
Bleed the circulation system.
Min. output of the circulation pump
too low to open the backflow
preventer.
Increase the value of the min. output of the circulation pump.
Hot water temperature
fluctuates.
Defective single-lever mixer at tapping
point.
Check whether the fluctuation occurs only at one tapping point.
If needed, replace single-lever mixer at this tapping point.
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.
Malfunctioning circulation, reduced
volume flow, insufficient heat transfer,
controlling no longer possible.
Check the entire circulation system: Shut-off elements, pump,
electrical connection, backflow preventer, and air in circulation
system.
Only without circulation system:
Very low tapping volume with very
high primary circuit temperature falls
below the controller limit range.
Reduce the primary circuit temperature.
It takes a long time until hot
water emerges from the
tapping point.
Incorrectly set circulation.
Check the circulation settings.
Circulation and standby function
deactivated due to a primary circuit
temperature that is too low.
Check the control/setting of the aux. heating. Increase the
primary circuit temperature.
Circulation pump defective.
Check the function of the circulation pump (manual operation).
LED has a steady red light.
Disinfection temperature below
required value.
Check the controller settings of the disinfection and restart
disinfection manually. The LED goes out if the disinfection cycle
runs successfully, in case of a power outage or disconnect from
the mains power supply, or if you set the disinfection operating
mode to “Off”. Increase the primary circuit temperature if
necessary.
Primary circuit temperature too low.
Check the control/setting of the aux. heating.
Date/time are incorrect.
Power supply outage.
Reset date and time.
Display depicts a temperature
of 222 °C.
Temperature sensor defective.
Check the electrical connection of the respective temperature
sensor. If necessary, replace the temperature sensor.
