14
Malfunctions
E & OE, subject to change without notice.
Malfunctions
8
Prior to malfunction diagnostics, make sure
that the following parameters are met:
Suf
fi
cient
fl
ow temperature, minimum 55°C at
►
maximum 45°C tap water temperature.
Faultless electrical connection.
►
Personal and material damage
Execute fault repair only with ade-
►
quate quali
fi
cation.
Disconnect the device from power
►
supply before opening it.
Adhere to regional norms and
►
regulations!
No hot water
8.1
Cause
Relief
Buffer tank not hot enough
Increase temperature in buffer tank
►
Charge pump doesn’t
convey buffer water
Check water level in buffer tank (extraction of buffer water for the
►
Fresh Water Station happens at the highest point of the tank).
De-aerate buffer circuit and check system pressure.
►
Check, if all shutoffs (buffer and tap water side) are open. If not,
►
open them.
Check hydraulic resistance between buffer tank and Fresh Water
►
Station and reduce it, if necessary.
Check at initiation if the Fresh Water Station is correctly con-
►
nected to the buffer circuit and drinking water system.
Check Flow-Switch and electricity box.
►
Replace broken charge pump.
►
Flow-Switch sends no signal
to charge pump
Remove Flow-Switch
A
Clean Flow-Switch housing
B
Reintegrate Flow-Switch
C
If the Flow-Switch still sends no signal to the charge pump,
D
replace Flow-Switch.
Electricity box broken
(relay doesn’t switch)
Check if power cord is connected to the electricity network.
A
Close shutoff valves
B
Remove Flow-Switch
C
Activate Flow-Switch manually. A working relay causes a swit-
D
ching noise in the electricity box.
If there is no switching noise, replace electricity box.
E
Wrong hot tapping water
temperature
Tap hot water. Turn the thermostatic head to max. temperature
A
for a short time.
Hot water is prepared: set then thermostatic head to the desired
►
temperature.
No hot water is prepared:
►
Check buffer water temperature.
»
Check the heat exchanger for thermal furring.
»