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DEX 18 / 21 / 24 / 27 KW
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 a nearby Austria Email
service point (see reverse for list of
addresses). Please have the details of
the typeplate at hand.
Austria Email AG
Central Customer Service
Tel. (03512) 700-297
E-Mail: kundendienst@austria-email.at
14. Troubleshooting and service
Your instantaneous water heater DEX 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.
Problem
Water stays cold, digital dis-
play does not light up
Display flashes error message
"Er"
Display flashes error message
"Er PH" or "188"
Flow rate of hot water too
weak
Selected temperature is not
reached , decimal point lights
up
Selected temp. is not reached ,
decimal point does not light
Decimal point flashes
No response upon keypress
24
Cause
Solution
Master fuse trip-
Renew or activate fuse
ped
Reset STDB by contact custo-
STDB tripped
mer service
Switch fuse off and on. If
Control system
"Er"still flashes contact custo-
has switched off
mer service
Check electrial connection by
Power supply
technician. 3~ 400 V/PE availa-
ble?
Outlet fitting dirty
Clean shower head, jet regula-
or calcified
tor or sieves
Fine filter dirty or
Let clean fine filter by customer
calcified
service
Reduce water flow rate at the
Water flow rate
tap
too high
Cold water has
Tap hot water only; set tempe-
been added via
rature for use
the tap
Inlet temperature
exceeding nomi-
Reduce inlet temperature
nal temperature
Hood is not fitted
Refit the hood properly
properly
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