STIEBEL ELTRON DHE 21 SLi Gebrauchs- Und Montageanleitung Seite 37

INSTALLATION
Troubleshooting
Possible indications of diagnostic traffic light (LED)
Red
Yellow
Green
Fault Cause
The appliance does not There is no mains voltage.
heat up / the set tem-
The safety switch (AE 3) has
perature is not reached.
responded.
The PCB is faulty.
A phase has failed.
The inlet temperature is
> 55 °C.
The flow rate sensor (DFE) is
faulty or not attached.
The heater is faulty.
The inlet sensor is faulty.
The outlet sensor is faulty.
A fault in the safety PCB.
A loose or faulty connecting
cable to the set value trans-
ducer.
The set value transducer is
faulty.
The display on the ap- A loose connecting cable to the
pliance is completely off. set value transducer.
The programming PCB is faulty. Green LED flashes
The flow rate is too low. The shower head / aerators are
scaled up.
The strainer is contaminated.
The set value cannot be Dynamic anti-scalding protec-
adjusted higher than tion is activated.
43 °C, nor can a differ-
ent set temperature be
selected.
Childproofing and/or tempera-
ture limiting is activated.
Cold water flows briefly The flow rate
during draw-off. (< 2 l/min) is too low.
The air sensor detects the
presence of air in the water and
briefly switches the heater off.
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Illuminates in case of faults
Illuminates in heating mode
Flashing: appliance is supplied with mains power
Diagnostic traf- Remedy
fic light
No LED illuminates Check the MCB/fuse in your fuse box.
No LED illuminates Remove the cause of the fault.
Protect the system against overheating by opening a draw-off valve downstream
of the appliance for one minute. This cools down the heating system. Activate the
safety switch by pressing the pushbutton on the safety switch (see also chapter
"Commissioning").
No LED illuminates Check the PCB and replace if necessary.
Flashing green LED, Check the MCB/fuse in your fuse box.
yellow LED on
Flashing green LED, Limit the inlet temperature.
red LED illuminates
Flashing green LED, Check the connection of the flow rate sensor and replace if necessary.
yellow LED off
Flashing green LED, Check the heater and replace if necessary.
yellow LED on
Flashing green LED, Replace the PCB.
red LED illuminates
Flashing green LED, Check the connection of the outlet sensor and replace if necessary.
red LED illuminates
Flashing green LED, Connect the connecting cable from the safety switch and check the safety switch.
red LED only during
draw-off
Green LED flashes Connect the connecting cable from the set value transducer and check the con-
necting cable.
Green LED flashes Check the set value transducer and replace it if required.
Green LED flashes Connect the connecting cable at the set value transducer and check the connect-
ing cable.
Check the programming unit and replace if necessary.
Descale or if necessary replace the shower head / aerators.
Clean the strainer.
Green LED flashes The dynamic anti-scalding protection is deactivated again 2 minutes after draw-
off.
Green LED flashes Disable temperature limiting.
The appliance restarts automatically when a flow rate of > 2.5 l/min has been
detected.
The appliance restarts after one minute.
DHE SLi | 37