Troubleshooting - STIEBEL ELTRON DHE 18 SLi 25 A Gebrauchs- Und Montageanleitung

INSTALLATIoN

Troubleshooting

14. Troubleshooting
WARNING Electrocution
In order to check the appliance it must be connected to
the power supply.
Push-fit connections on the PCB
3
2
1
Indicator options for diagnostic traffic light (LED)
Red
Yellow
Green
fault Cause
The appliance does There is no power supply.
not heat up / the set
temperature is not
reached.
The safety switch (AE3) has
responded.
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.
A loose or faulty connecting
cable to the set value trans-
ducer.
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1 Diagnostic traffic light (3 LEDs)
2 Flow sensor DFE
3 Motorised valve
4 High limit safety cut-out STB
5 Outlet sensor NTC
6 Set value transducer
7 Safety switch AE 3; plug-in connection secured with locking
tab.
4
5
6
7
Illuminates in the event of a fault
Illuminates during heating operation
Flashing: Appliance connected to power supply
Diagnostic traf- remedy
fic light
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 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").
No LED illuminates Check the PCB and replace if necessary.
Flashing green LED, Check the MCB/fuse in your fuse box/distribution panel.
yellow LED on
Flashing green LED, Limit the inlet temperature.
red LED on
Flashing green LED, Check the connection of the flow sensor and replace if necessary.
yellow LED off
Flashing green LED, Check the heating system and replace if necessary.
yellow LED on
Flashing green LED, Replace the PCB.
red LED on
Flashing green LED, Check the connection of the outlet sensor and replace if necessary.
red LED on
Flashing green LED, Connect the connecting cable from the safety switch and check the safety switch.
red LED only during
draw-off
Green LED flashing Connect the connecting cable from the set value transducer and check the connect-
ing cable.
DHE SLi | 39