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FCR 21 |
19
EN
GL
ISH
INSTALLATION
Troubleshooting
12. Troubleshooting
Fault
Cause
Remedy
The water does not
heat up.
The high limit safety cut-
out has responded because
the controller is faulty.
Replace the thermostat and
press the high limit safety
cut-out reset button.
The high limit safety cut-
out has responded because
the temperature has fallen
below -15 °C.
Press the reset button.
The rapid heating does not
switch on.
Check the contactor and
replace if required.
A heating element is faulty.
Replace the heating ele-
ment or flanged immersion
heater.
The high limit safety cut-
out has responded because
an indirect coil in the same
cylinder is set too high.
Limit the maximum tem-
perature of the indirect
coil.
The safety valve drips
when the heating is
switched off.
The valve seat is contami-
nated.
Clean the valve seat.
26
�0
2�
09
�0
01
1
1
1 High limit safety cut-out reset button
13. Maintenance
WARNING Electrocution
Before any work on the appliance, disconnect all poles
from the power supply.
13.1 Checking the safety assembly
f
f
Check the safety assembly regularly.
13.2 Descaling the flanged immersion heater
f
f
Descale the flanged immersion heater only after it has been
removed.
13.3 Removing the flanged immersion heater
1
1
26
�0
2�
09
�0
00
3
1 Threaded extraction holes M12
f
f
Use the threaded extraction holes to release the flange plate
from the flange connector.
13.4 Replacing the heating elements and protective
pipe
1
2
3
26
�0
2�
09
�0
01
1
1 Protective pipe
2 Heating element
3 Flange plate
f
f
When installing heating elements or a protective pipe, en-
sure that the components are electrically isolated from the
flange.
1
26
�0
2�
09
�0
00
3
1 Corrosion resistor 390 Ω
f
f
Connect the heating elements with the cylinder via the corro-
sion resistor.
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