11
Instructions for user - CEX9-U - 801041 - November 2018 v1.00 Art.no:
9120-25688
8. Troubleshooting and service
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 organisa-
tion of your importer or the Central
Customer Service Department. Please
have the details of the typeplate at
hand.
This instantaneous water heater was manufactured conscientiously and checked sev-
eral times before delivery. 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.
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 cus-
tomer service
Flow rate of hot water too
weak
Outlet fitting dirty or
calcified
Clean shower head, jet regu-
lator or sieves
Fine filter dirty or
calcified
Let clean fine filter by a spe-
cialist
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 tem-
perature for use
Symbol “sun“ lights up
Inlet temperature
exceeding nominal
temperature
Reduce inlet temperature
Appliance heats, the display
does not light
Display plug not prop-
erly connected
Let fix correct position of
display plug by customer
service
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
custo mer service.
