STIEBEL ELTRON DHE 27 AU User Manual

ENGLISH
www.stiebel-eltron.com DHE AU| 17
INSTALLATION
Troubleshooting
Possible indications of diagnostic traffic light (LED)
Red Illuminates in the event of a fault
Yellow Illuminates during 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
temperature is not
reached.
There is no mains voltage. No LED illuminates Check the MCB/fuse in your fuse box/distribution panel.
The safety switch (AE 3) has
responded.
No LED illuminates Remove the cause of the fault.
Protect the heating system against overheating by opening a draw-off valve down-
stream of the appliance for one minute. Activate the safety switch by pressing the
pushbutton on the safety switch (see also chapter "Commissioning/ Initial start-
up").
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/distribution panel.
The inlet temperature is
>55°C.
Flashing green LED,
red LED on
Limit the inlet temperature.
The flow sensor (DFE) is faulty
or not attached.
Flashing green LED,
yellow LED off
Check the connection of the flow sensor and replace if necessary.
The heating system is faulty. Flashing green LED,
yellow LED on
Check the heating system and replace if necessary.
The inlet sensor is faulty. Flashing green LED,
red LED on
Replace the PCB.
The outlet sensor is faulty. Flashing green LED,
red LED on
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 connect-
ing cable.
The set value transducer is
faulty.
Green LED flashes Check the set value transducer and replace it if required.
Childproofing and/or tempera-
ture limiting is activated.
Green LED flashes Disable temperature limiting.
The display on the
appliance is complete-
ly 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 connecting
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
different set tempera-
ture 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.
Cold water flows brief-
ly 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 de-
tected.
The air sensor detects the
presence of air in the water and
briefly switches the heater off.
The appliance restarts after one minute.

STIEBEL ELTRON DHE 27 AU Specifications

General

Brand	STIEBEL ELTRON
Model	DHE 27 AU
Category	Water Heater
Language	English