STIEBEL ELTRON DHE 18 Gebrauchs- Und Montageanweisung Seite 30

English
Troubleshooting by user and qualified installer
Probelm
Insufficient flow
ERROR symbol continuously displayed
on control unit
ERROR symbol displayed on control unit
only when water is run
Heating does not come on / no hot
water
Cold water for short periods
Table 4
Fault recovery by qualified installer
e l e c t r o n i c c o m f o r t
3
M1
ECO
Abb. 26 / Fig. 26 / Afb. 26
30
Cause
– ECO mode is activated (8 l/min)
symbol 7
– Shower head/rose blocked with
limescale
– Dirt
– Safety switch has been actived under
load
– Malfunction in control unit/unit
communication
– Internal sensor error
– Reset push-button of safety switch not
activated on start-up (Item 15)
– Error in safety monitoring system (safety
switch tripped or cannot be activated)
– Inlet temperature above 60 °C
– No power
– Heating system faulty
– Air detection system senses air in the
water and switches heating power off
for short periods
C
ECO
m a x m a x
M2
6 7 8 9 10
2
1
4
°
C
° °
11
l
min
5
°C
E R R O R
12
13
14
15
Solution
– User: Press ECO push-button, symbol
disappears.
– User:
Descale or renew.
– Service engineer required: Clean filter.
– Service engineer required: Look for ser-
vice mode (error message will be deleted).
– Service engineer required:
– Service engineer required:
– User / qualified installer:
Limit inlet temperature to below 60 °C.
– Service engineer required:
Check fuse (domestic system).
– Service engineer required:
Measure resistance in heating system
and if necessary replace.
– Unit will return to normal operation in
a few seconds.
The DHE is supplied as standard with an
integrated diagnostic system to locate faults
quickly. The DHE's control units have
therefore been given some new functions in
service mode.
The tripped safety switch can be reset
using the blue reset push-button
(item 15), but the unit must have
been installed.
Key to Fig. 26
1 Thermostat (with rotary knob and push-
button function) / In service mode it is
possible to switch between the individual
service displays by pressing the
thermostat (Table 5)
2 ECO push-button (automatically restricts
the maximum flow to 8 l/min)
3 Memory push-buttons
4 Service symbol (customer service mode
activated)
5 Power bar for currently connected po-
wer between 0% and 100% of maximum
power / In service mode the power bar
is used as a service display
6 EIB symbol when connected to electric
domestic control system
7 ECO symbol when in ECO mode
8 Solar mode activated
9 Temperature restriction activated
10 Error message
11 Line display unit
12 Push-button for solar mode
13 Push-button for temperature restriction
14 Push-button for customer service mode
15 Safety switch reset push-button