Troubleshooting - STIEBEL ELTRON DEL 24 SLi Gebrauchs- Und Montageanweisung

6. Troubleshooting

Fault Cause
No hot water No mains voltage
/ Outlet tem-
AE3 has tripped
perature not
correct
Electronic fault
Failure of a phase
Unit at power limit Green LED
Inlet temperature
> 55 °C
DFE faulty or not
plugged in
Heating system
faulty
Inlet sensor faulty
Outlet sensor
faulty
Error in the safety
electronics
Flow too Showerhead/perla-
small tors scaled
Fouling
LCD display No mains voltage
completely off
AE3 has tripped
Loose connecting
cable to control
unit
Control unit elec-
tronics faulty
Set value not Control unit elec-
adjustable tronics faulty
Set value Temperature cut-
cannot be set out is activated
above 43 °C
Short term No flow break in
cold water
Air recognition
trips (cold water
for approx. 1 min)
Table 4
LED display options
by the user and the qualified installer
Display diagno- Further diagnosis
sis LED with service
monitor *
No LED on
Power bar 100 % User:
flashingYellow
LED off
Green LED flas- Display C1 (inlet)
hingRed LED on
Green LED Check flow
flashingYellow
LED of
Green LED
flashingYellow
LED on
Error E1 (ELEC)
Green LED
flashingRed LED
Error E2 (NTC)
permanently on
Green LED flas- Error E3 (AE3)
hingRed LED on
in tap operation
(Check flow)
No LED on
Green LED
flashing
gGreen LED
flashing
Green LED °C max symbol is
flashing displayed
* Weitergehende Diagnosemöglichkeit bietet der Service-Monitor Best. 22 13 32
(siehe „7. Sonderzubehör").
red yellow green
Elimination
User: Check fuse in the house installation
Qualified installer: Clarify cause. Rinse heating-system of unit, in
order to avoid over-heating. Switch AE3 on again
(check correct connection STB).
Qualified installer: Check electronics and if necessary replace
User: Check fuse in the house installation
Reduce flow
Qualified installer: If necessary install DMB
Qualified installer: Limit inlet temperature
Qualified installer: Check or replace DFE connection
Qualified installer: Check heating system and replace if necessary
Qualified installer: Replace electronics
Qualified installer: Check connection if necessary replace outlet
sensor
Qualified installer: Attach AE3 connection cable and check AE3
User: Check fuse in the house installation
Qualified installer: Clean filter
User: Check fuse in the house installation
Qualified installer: Clarify cause. Rinse heating-system of unit, in
order to avoid over-heating. Switch AE3 on again
(check correct connection STB).
Qualified installer: Attach/check connecting cable
Qualified installer: Check control unit if necessary replace
Qualified installer: Check control unit if necessary replace
Qualified installer: Deactivate temperature cut-out
Unit goes automatically back into operation if sufficient flow present
Unit goes automatically back into operation with delay
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