36 | DEL SL electronic LCD www.stiebel-eltron.com
INSTALLATION
Maintenance
LED diagnostic
traffic light
Fault Cause Remedy
Flashing green
light and steady
yellow light
No hot water at flow rate of
> 3 l/min.
The high limit safety cut-out has responded or its
lead is broken.
Check the appliance and the high limit safety cut-
out.
The set temperature is not
achieved.
One phase down. Check the fuses/MCBs in your fuse box.
The heater is faulty. Measure the resistance of the heating system and
replace if required.
The outlet temperature sensor is faulty. Check the outlet temperature sensor and replace if
required.
The appliance is at its output limit. Reduce the flow rate or install the flow limiter.
The outlet temperature is approx.
45°C, irrespective of the set value
transducer
The set value transducer or connecting cable is faulty,
or the connecting cable is not attached.
Attach the connecting cable; replace the set value
transducer if required.
A set temperature of >43°C is not
achieved.
The temperature limit (child-proofing)/ anti-scalding
protection is enabled.
Disable the temperature limit (child-proofing)/ an-
ti-scalding protection.
Flashing green
light and steady
red light
No hot water.
The outlet temperature sensor is faulty.
Check the outlet temperature sensor and replace if
required.
The cold water sensor is faulty. Check the PCB, replace if required.
The air sensor detects the presence of air in the water
and briefly interrupts the heating output.
The appliance restarts after one minute.
The flow rate is >25l/min. Reduce the flow rate or install the flow limiter.
Selected temperatures above 45°C
are not achieved.
The cold water inlet temperature is above 45°C (e.g.
in the case of water preheated by solar energy).
Reduce the cold water inlet temperature to the ap-
pliance.
14. Maintenance
WARNING Electrocution
Before any work on the appliance, disconnect all poles
from the power supply.
Draining the appliance
You can drain the appliance for maintenance work or to protect
it from frost.
CAUTION Scalding
Hot water may escape when draining the appliance.
Close the shut-off valve in the cold water inlet line.
Open all draw-off valves.
Undo the water connections on the appliance.
Store the dismantled appliance in a room free from the risk
of frost, as water residues remaining inside the appliance can
freeze and cause damage.
15. Specification
15.1 Dimensions and connections
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