Operating Instructions and Installation Instructions

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