Fault Codes - STIEBEL ELTRON WWK 221 electronic Bedienung Und Installation

INsTALLATIoN
Troubleshooting
Note
Refit the appliance cover after completing your work. See
chapter "Maintenance and cleaning / Fitting the appliance
cover".

14.1 Fault codes

Fault description
2 Contin- The cylinder top sensor is
uously faulty. The actual temperature
on display switches from the cyl-
inder top sensor to the integral
sensor. The appliance contin-
ues to heat without any loss of
comfort. The mixed water vol-
ume cannot be calculated and
is displayed as "- -".
4 Contin- The integral sensor is faulty.
uously In the event of a faulty integral
on sensor, the integral sensor is
set to the value of the cylinder
top sensor, and the mixed
water volume is calculated
using this value. The appliance
continues to heat with a re-
duced start hysteresis.
A mixed water volume is
still calculated, based on the
assumption that the cylinder
top temperature is reached
throughout the DHW cylinder.
6 Flash- The cylinder top sensor and the
ing integral sensor are faulty. The
appliance no longer delivers
heat.
8 Flash- The appliance has ascertained
ing that the DHW cylinder has not
been heated within the max-
imum temperature increase
time, despite there being a
demand.
www.stiebel-eltron.com
remedy
Check that the plug is seated
correctly.
Measure the resistance of the
sensor and compare it with
the resistance table.
Install the replacement sen-
sor.
Check that the plug is seated
correctly.
Measure the resistance of the
sensor and compare it with
the resistance table.
Install the replacement sen-
sor. In the service menu, use
parameter "IE" to switch to
standby mode.
Check that the plug is seated
correctly.
Measure the resistances of
the sensor and compare them
with the resistance table.
Install the replacement sen-
sor. In the service menu, use
parameter "IE" to switch to
standby mode.
Check if a DHW circulation
line is installed and wheth-
er it is insulated. The total
output loss is greater than
the heating output of the
appliance.
Check if a DHW circulation
pump is installed and wheth-
er it is controlled according to
temperature or time. If neces-
sary, install a corresponding
control unit.
Check the refrigerant circuit
for leaks.
Fault description
16 Contin- A short circuit of the impressed
uously current anode has occurred or
on the protective anode is faulty.
32 Flash- The appliance is not being op-
ing erated with a completely filled
DHW cylinder. The appliance is
not heating.
The anode current is inter-
rupted. The appliance is not
heating.
64 Contin- The defrost temperature has
uously not yet been reached after the
on maximum defrost time has
elapsed. The compressor is not
working.
128 Contin- There is no communication
uously between the controller and the
on programming unit. The most
recently selected set values are
active. The appliance continues
to heat.
256 Flash- Manually activated emergency
ing mode (only electric emergency/
booster heater active)
512 Flash- A fault has occurred in the re-
ing frigerant circuit.
E 1 Flash- The temperature sensor on the
ing air inlet is faulty.
E 2 Flash- The temperature sensor on the
ing evaporator is faulty.
E 4 Contin- The hot gas temperature sensor
uously is faulty. The appliance con-
on tinues to heat. To protect the
appliance, the (possibly higher)
set temperature is reduced to
the set value for setback.
remedy
Check the cables and relevant
plug-in connections of the
impressed current anode
according to the connection
diagram and replace faulty
cables.
Check the impressed current
anode in the heating element/
anode assembly and replace
if necessary.
Fill the DHW cylinder of the
appliance. The fault code
disappears and the appliance
starts.
Check the contacts of the im-
pressed current anode.
Check the position of the
evaporator sensor in the
evaporator.
Check the response of the
solenoid diverter valves when
the appliance voltage is con-
nected. Replace the coil body
if necessary.
Replace the solenoid valve
body.
Check that the plug is seated
correctly and replace the con-
necting cable if necessary.
Replace the programming
unit PCB.
See chapter "Appliance de-
scription / Emergency mode".
Check the refrigerant circuit
for leaks.
Check the function and set-
ting of the expansion valve.
Check that the plug is seated
correctly.
Measure the resistance of the
sensor and compare it with
the resistance table.
Replace the sensor.
Check that the plug is seated
correctly.
Measure the resistance of the
sensor and compare it with
the resistance table.
Replace the sensor.
Check that the plug is seated
correctly.
Measure the resistance of the
sensor and compare it with
the resistance table.
Replace the sensor.
WWK 221-301 electronic | 69