STIEBEL ELTRON WWK 223 electronic - Motor Overload Relay; Maintenance and Cleaning; Removing the Appliance Cover; Resetting the High Limit Safety Cut-Out

INSTALLATION
Maintenance and cleaning
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ENGLISH
Fault description Remedy
E 64 flash-
ing
Evaporator temperature <
minimum evaporator tem-
perature
Check whether the evaporator
is clogged with deposits. If
required, clean the evaporator
with clear water without clean-
ing agents or other additives.
Check whether the air can flow
freely through the appliance.
Check whether the fan is blocked
or faulty. Replace the fan if re-
quired.
Check the function and setting of
the expansion valve.
E 128 flash-
ing
A permanent pressure switch
fault has occurred. A pressure
fault occurred multiple times
within a defined pressure
fault evaluation time.
Check the relevant fault counter
and find the corresponding
fault code remedy: E16 (high
pressure), E32 (electrical wiring
fault). Once the cause of the fault
has been eliminated, reset the
fault code under menu option
"Hd 1" by pressing the "Rapid
heat-up" key.
14.2 Resetting the high limit safety cut-out
If the DHW cylinder is overheated, the high limit safety cut-out
switches off the electric emergency/booster heater to protect the
appliance.
1
D0000080702
1 Reset button for high limit safety cut-out
f Once the cause of the fault has been removed, press the reset
button of the high limit safety cut-out on the rod thermostat.
To do so, remove the appliance cover.
14.3 Motor overload relay
In the event of excessive thermal load on the compressor, the
motor overload relay switches the compressor off.
f Remove the cause.
After a short cooling period, the motor overload relay will restart
the compressor automatically.
15. Maintenance and cleaning
WARNING Electrocution
Prior to all work on the appliance, isolate it from the
power supply.
15.1 Removing the appliance cover
D0000035322
f Undo the screw (Torx) that secures the control fascia to the
appliance.
f Push the control fascia upwards.
D0000034802
f Remove the control fascia.
f A lead connects the operating controls to the appliance PCB.
If necessary, pull the plug from the back of the control fascia
to fully remove the control fascia.
f Carefully lift away the appliance cover and undo the earth
cable that runs from the appliance control panel to the cover.
Note
Refit the appliance cover after completing your work. See
chapter "Maintenance and cleaning/ Fitting the appliance
cover".