STIEBEL ELTRON DHE 21 User Manual

INSTALLATION
Troubleshooting
96 | DHE www.stiebel-eltron.com
15.1 Fault code display
If there is an appliance fault, the spanner flashes on the display.
 To call up the fault code display, press the "i" button for more
than 5seconds.
Diagnostic traffic
lights (draw-off
mode)
Display shown Fault Cause Remedy
Green flashing, yellow
off, red on
Spanner flashes (fault code
display E1 and spanner)
No DHW
Safety switch not activated during
"Commissioning"
Activate the safety switch by firmly
pressing the reset button
Safety switch was triggered by high
limit safety cut-out
Check high limit safety cut-out (plug-in
connection, connecting cable); activate
safety switch
Safety switch responds again after high
limit safety cut-out has been checked;
high limit safety cut-out faulty
Replace high limit safety cut-out; ac-
tivate safety switch and draw-off with
maximum set value >1min
Safety switch responds again; PCB
faulty
Replace the function module
Green flashing, yellow
off, red on
Spanner flashes (fault code
display E2 and spanner)
No DHW PCB faulty (lead break or short circuit
in inlet sensor)
Replace the function module
Green flashing, yellow
off, red on
Spanner flashes (fault code
display E3 and spanner)
No DHW Short circuit in outlet sensor Check outlet sensor; replace if neces-
sary

STIEBEL ELTRON DHE 21 Specifications

General

Type	Electronic instantaneous water heater
Rated output	21 kW
Protection class	IP25
Energy efficiency class	A
Temperature range	60 °C
Power supply voltage	400 V
Dimensions	105 mm