STIEBEL ELTRON WWK 220 electronic - Page 12

OPERATION
Troubleshooting
12 | WWK 220-300 electronic www.stiebel-eltron.com
Fault code
If the service/fault symbol is flashing or continuously illuminated
on the display, you can call up a fault code.
Repeatedly press the menu key until the
fault code is shown following set tem-
perature2.
Fault code appears
Fault
code
Service/
fault
symbol
Fault description Remedy
0 No fault
2 continu-
ously illu-
minated
Dome sensor faulty. The actual
temperature display switches
over to the integral sensor. The
appliance continues to deliver
heat. The amount of mixed
water shown is always less
than 10 litres.
4 continu-
ously illu-
minated
Integral sensor faulty. In the
event of a faulty integral sen-
sor, the integral sensor is set
to the dome sensor value and
amount of mixed water is cal-
culated using this value. The
appliance continues to deliver
heat.
6 flashes Dome sensor and integral
sensor faulty. The appliance no
longer delivers heat.
8 flashes The appliance has ascertained
that the DHW cylinder has not
been heated for 13 hours, de-
spite there being a demand.
You can continue to
use the appliance by
activating emergency
mode. See chapter
"Emergency mode".
16 continu-
ously illu-
minated
Short circuit impressed current
anode / protective anode faulty
Immediately notify a
qualified contractor,
as the appliance is not
protected against cor-
rosion if the impressed
current anode is faulty.
32 flashes
The appliance is operating with
an empty cylinder or the appli-
ance is not delivering heat.
Fill the appliance. The
fault code disappears
and the appliance
starts.
The anode current is inter-
rupted. The appliance does not
heat up.
The contractor needs
to check the impressed
current anode and the
wiring.
128 continu-
ously illu-
minated
No communication between
controller and programming
unit. The most recently selected
set values are active.
256 flashes Manually activated emergency
mode (only electric emergency/
booster heater active).
See chapter "Appliance
description/ Emergen-
cy mode".
If several faults occur, the fault codes are added up.
Example: If both the dome sensor and integral sensor are faulty,
the display shows fault code6(=2+4).
Application scenarios for emergency mode
If the appliance shows fault code8, you can manually activate
emergency mode. If a different fault occurred previously, but did
not cause the appliance to switch off, the display may show a fault
code that is the result of several faults added together.
Listed below are the fault codes which will allow you to activate
emergency mode.
Fault code displayed
8 8
10 Fault code 8 + fault code 2
12 8+4
24 8+16
26 8+2+16
28 8+4+16
138 8+2+128
140 8+4+128
152 8+16+128
154 8+2+16+128
156 8+4+16+128
When the appliance is operating in emergency mode, the fault
code shown is increased by 256.
Notifying a qualified contractor
If you cannot remedy the fault, notify your qualified contractor. To
facilitate and speed up your request, provide the serial number
from the type plate (000000-0000-00000). The type plate can be
found on the left, above the "DHW outlet" connection.
Sample type plate
000000-0000-000000
D0000035352
1
1 Number on the type plate
314104-38523-9034_WWK_220-300_electronic_en_pl.indb 12 24.02.2015 10:33:30