Troubleshooting; Maintenance - STIEBEL ELTRON DEL 18 Plus Bedienung Und Installation

INsTALLATIoN

Troubleshooting

15. Troubleshooting
WARNING Electrocution
To test the appliance, it must be connected to the power
supply.
Display indication Cause
E1 | Spanner Fault in electronic safety circuit.
E2 flashing Break or short circuit in inlet sensor.
E3 flashing Short circuit in outlet sensor.
Diagnostic traffic Fault
light
No LED illuminates. The appliance does not heat
up.
Green flashes, yellow No DHW
off, red off
Green flashes, yellow The display is completely off. Loose set value transducer cable between PCB and
on, red off
Green flashes, yellow No DHW, the outlet temper-
on, red off ature does not match the set
value.
Green flashes, yellow No DHW, the outlet temper-
off, red on, E1 displayed ature does not match the set
value.

16. Maintenance

WARNING Electrocution
Before any work on the appliance, ensure omnipolar
disconnection from the power supply.
Draining the appliance
The appliance can be drained for maintenance work.
WARNING Burns
Hot water may escape when you drain the appliance.
f Close the 3-way ball shut-off valve or the shut-off valve in the f
cold water supply line.
f Open all draw-off valves. f
f Undo the pipe connections from the appliance. f
f Store the dismantled appliance in a room free from the risk f
of frost, as water residues remaining inside the appliance can
freeze and cause damage.
36 | DEL Plus
Indicator options for diagnostic traffic light (LED)
Cause
There is no power supply.
The PCB is faulty.
The shower head / aerator are scaled up.
The strainer in the cold water inlet is dirty.
The flow meter is not plugged in.
The flow meter is faulty.
The PCB is faulty.
display.
The programming unit connecting cable is faulty.
The programming unit PCB is faulty.
The downstream tap is faulty.
Internal anti-scalding protection is activated.
The heating system is faulty.
The outlet detector is faulty.
The PCB is faulty.
The high limit safety cut-out is not enabled.
The high limit safety cut-out is not connected.
The high limit safety cut-out has tripped.
The high limit safety cut-out is faulty.
Cleaning the strainer
If dirty, clean the strainer in the threaded cold water fitting. Close
the 3-way ball shut-off valve or the shut-off valve in the cold water
supply line before removing, cleaning and refitting the strainer.
Note
The diagnostic traffic light is displayed when water flows.
Red Illuminates in the event of a fault
Yellow Illuminates in heating mode/flashes when output restric-
tion reached
Green Flashing: Appliance connected to power supply
remedy
Check the fuse/MCB in your fuse box/distribution
board.
Replace the test assembly.
Descale or replace the shower head / aerator if nec-
essary.
Clean the strainer.
Reconnect the connecting cable on the PCB.
Replace the flow meter.
Replace the test assembly.
Check the set value transducer cable and plug the
cable into the programming unit and/or PCB.
Check the connecting cable and replace if required.
Check the programming unit and replace if required.
Replace the faulty tap.
Deactivate the internal anti-scalding protection.
Replace the test assembly.
Replace the outlet sensor.
Replace the test assembly.
Enable the safety switch.
Reconnect the connecting cable on the PCB.
Remedy the cause and activate the safety switch.
Replace the high limit safety cut-out.
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