P.18
P.19
13. Trouble-shooting and Service
This instantaneous water heater was manufactured conscientiously
and checked several times before delivery. Should malfunctions
nevertheless occur, it is usually only due to a bagatelle. First attempt
to switch the house fuses off and on again in order to reset the
electronics. Next, try to remedy the problem with reference to the
following table. In doing so, you will avoid unnecessary expense of
customer service assistance.
Repairs must only be
carried out by authorised
professionals.
If a fault in your appliance
cannot be rectified with
the aid of this table,
please contact the service
organisation of your importer
or the Central Customer
Service Department. Please
have the details of the
typeplate at hand.
Quick reference guide
Arrow key down
Arrow key up
Programme button 1
Programme button 2
Power limit
+
Reset
1
Press + hold!
Reset completed
3
2
+
Press
≥
3 sec
1
2
Scalding protection off
Confirmation
of deactivation
Unit provides no output
Set temperature
1
–1 °C
+1 °C
Select preset temperature
A1
A2
B1
B2
Store temperature
2
Press
≥
3 sec
Display of new value
(e.g. 43 °C)
Set required
temperature
(e.g. 43 °C)
4
3
1
Convenience zone 35.0..42.0 °C
1
–0.5 °C
+0.5 °C
3
Confirmation
of activation
Scalding protection on
+
Press
≥
3 sec
1
2
Enter service menu
2
8
4
7
5
3
6
9
+
1
Display flashes
Press
≥
2 sec
MADE IN GERMANY
Problem
Cause
Solution
Water stays cold, digital
display does not light up
Master fuse tripped Renew or activate fuse
Safety pressure cut-
out tripped
Contact customer service
Water stays cold, digital
display does light up
Safety thermal cut-
out tripped
Contact customer service
Display flashes error mes-
sage “Er“
Control system has
switched off
Switch fuse off and on. If
“Er“ still flashes contact
customer service
Flow rate of hot water too
weak
Outlet fitting dirty or
calcified
Clean shower head, jet
regulator or sieves
Fine filter dirty or
calcified
Let clean fine filter by a
specialist
Selected temperature is
not reached , “MAX“ lights
Water flow rate too
high
Reduce water flow rate at
the tap
Selected temp. is not
reached , “MAX“ does not
light
Cold water has been
added via the tap
Tap hot water only; set
temperature for use
Symbol “sun“ lights up
Inlet temperature
exceeding nominal
temperature
Reduce inlet temperature
Appliance heats, the dis-
play does not light
Display plug not
properly connected
Let fix correct position of
display plug by customer
service
MADE IN GERMANY
If the connection cable is damaged, it must be replaced with
an original spare cable from the manufacturer by an authorised
technician in order to avoid any hazards.
If you cannot rectify the fault with the aid of the troubleshooting
table, please contact the customer service.
