STIEBEL ELTRON WWK 221 electronic Bedienung Und Installation Seite 54

oPerATIoN
Troubleshooting
Fault Cause
The condensate The surface temperature
drain drips. of the evaporator is lower
than the dew point tem-
perature of the ambient
air. Condensate forms.
The room tem- If the appliance is operated
perature drops. in recirculation air mode:
operation of the appliance
can cause the room tem-
perature to fall by 1 to 3 °C,
as the appliance extracts
energy from the air.
High power con- The lower the intake tem-
sumption perature, the lower the
heat pump efficiency.
Runtime-dependent rapid
heat-up is activated.
The "Service/ See chapter "Fault codes". Notify a qualified contractor.
fault" symbol
is continuously
illuminated.
The "Service/ See chapter "Fault codes". It is imperative that you notify a
fault" symbol
flashes and the
water does not
heat up.
The "Defrost" The appliance is in defrost
symbol is mode.
shown.
The "Heat There is a heat demand,
pump" symbol is but the compressor is
flashing. locked out.
The intake air temperature
is outside the application
limits (see "Specification /
Data table" chapter). The
compressor was switched
off/locked automatically.
The "Electric A temperature controller
emergency/ has switched off the elec-
booster heater" tric emergency/booster
symbol is flash- heater during rapid heat-
ing. up.
The "Electric The "Electric emergency/
emergency/ booster heater" symbol is
booster heater" illuminated when there is a
symbol is illu- demand. The internal con-
minated but the troller of the electric emer-
electric emer- gency/booster heater may
gency/booster have ended electric heat-
heater is not ing. A possible cause may
operational. be a fault in the electric
emergency/booster heater.
A possible cause may be
that the high limit safety
cut-out has responded.
54 | WWK 221-301 electronic
remedy
The amount of condensate de-
pends on the humidity level of
the ambient air.
If the room temperature falls
by more than 5 °C, check the
room size (see the "Specifi-
cation / Data table" chapter).
Supplying energy by opening
a door to another room will
remedy this.
Where possible, avoid high set
temperatures and the use of
rapid heat-up.
Only activate this function if
really necessary or increase
the runtime during which the
heat pump operates alone and
the electric emergency/booster
heater is blocked via your se-
lected parameters.
A continuously illuminated
"Service/fault" symbol indicates
that a fault has occurred, but
the heat pump is heating nev-
ertheless.
qualified contractor quickly. A
flashing "Service/fault" symbol
indicates that a fault has oc-
curred and the heat pump is no
longer heating.
No action required.
No action required. The com-
pressor restarts automatically
after the compressor lockout
time has elapsed. The symbol
stops flashing automatically.
No action required. The ap-
pliance heats the water using
the electric emergency/booster
heater. As soon as the tem-
perature is back within the
application limits, the heating
process is continued with the
compressor.
No action required. The ap-
pliance continues the rapid
heat-up process using the heat
pump. The symbol stops flash-
ing when the controller re-en-
ables the electric emergency/
booster heater. The symbol
goes out when the temperature
throughout the DHW cylinder
reaches the set rapid heat-up
temperature.
Have a qualified contractor
check whether the controller of
the electric emergency/booster
heater is set correctly. The
controller must be turned fully
anti-clockwise. Have a qualified
contractor check the high limit
safety cut-out.
Fault Cause
The "electric The "runtime-dependent
emergency/ rapid heat-up" function
booster heat- is enabled and currently
er" symbol in use.
illuminates even
though the ap-
pliance is within
the application
limits and "rapid
heat-up" has not
been pressed.
Fault code
You can call up a fault code if the "Service/fault" symbol is flashing
or continuously illuminated on the display.
Keep pressing "Menu" until the fault code
appears.
Fault description
2 Contin- The cylinder top sensor is faulty.
uously The actual temperature display
on switches from the cylinder top
sensor to the integral sensor.
The appliance continues to heat
without any loss of comfort. The
mixed water volume 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 reduced start
hysteresis.
A mixed water volume is still
calculated, based on the as-
sumption that the cylinder
top temperature is reached
throughout the DHW cylinder.
6 Flashing The cylinder top sensor and the
integral sensor are faulty. The
appliance no longer delivers
heat.
8 Flashing The appliance has ascertained
that the DHW cylinder has not
been heated within the max-
imum temperature increase
time, despite there being a
demand.
16 Contin- A short circuit of the impressed
uously current anode has occurred or
on the protective anode is faulty.
remedy
No action required.
remedy
Notify a qualified contractor.
Notify a qualified contractor.
Notify a qualified contractor.
You can temporarily contin-
ue to use the appliance by
pressing the "Rapid heat-
up" key to activate emergen-
cy heating mode. See chap-
ter "Appliance description /
Emergency mode".
Immediately notify a quali-
fied contractor, as the appli-
ance is not protected against
corrosion if the impressed
current anode is faulty.
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