STIEBEL ELTRON DHE 21 SL LABS Bedienungs Und Installationsanleitung Handbuch Seite 30

INSTALLATIoN
Troubleshooting
possible indications of diagnostic traffic light (LED)
Red
Yellow
Green
fault Cause
The appliance does There is no mains voltage.
not heat up / the set
The safety switch (AE3) has
temperature is not
responded.
reached.
The PCB is faulty.
A phase has failed.
The inlet temperature is
> 55 °C.
The flow sensor (DFE) is faulty
or not attached.
The heating system is faulty.
The inlet sensor is faulty.
The outlet sensor is faulty.
A fault in the safety PCB.
The flow rate is too The shower head / aerators are
low. scaled up.
The strainer is contaminated.
Cold water flows brief- The flow rate
ly 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.
30 | DHE SL LABS
Illuminates in the case of faults
Illuminates in heating mode
Flashing: Appliance is supplied with mains power
Diagnostic traffic light remedy
No LED illuminates Check the MCB/fuse in your fuse box/distribution panel.
No LED illuminates Remove the cause of the fault.
Protect the heating 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 button on the
safety switch (see also chapter "Commissioning").
No LED illuminates Check the PCB and replace if necessary.
Flashing green LED, yellow Check the MCB/fuse in your fuse box/distribution panel.
LED on
Flashing green LED, red LED Limit the inlet temperature.
on
Flashing green LED, yellow Check the connection of the flow sensor and replace if necessary.
LED off
Flashing green LED, yellow Check the heating system and replace if necessary.
LED on
Flashing green LED, red LED Replace the PCB.
on
Flashing green LED, red LED Check the connection of the outlet sensor and replace if necessary.
on
Flashing green LED, red LED Connect the connecting cable from the safety switch and check the safety
only during draw-off switch.
Descale or if necessary replace the shower head / aerators.
Clean the strainer.
The appliance restarts automatically when a flow rate of > 2.5 l/min has
been detected.
The appliance restarts after one minute.
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