Troubleshooting; Maintenance; Checking The Safety Assembly; Descaling The Flanged Immersion Heater - Stiebel Eltron FCR 21/60 Utilisation Et Installation

INSTALLATION

Troubleshooting

12. Troubleshooting
Fault Cause
The water does not The high limit safety cut-
heat up. out has responded because
the controller is faulty.
The high limit safety cut-
out has responded because
the temperature has fallen
below -15 °C.
The rapid heating does not
switch on.
A heating element is faulty. Replace the heating ele-
The high limit safety cut-
out has responded because
an indirect coil in the same
cylinder is set too high.
The safety valve drips The valve seat is contami-
when the heating is nated.
switched off.
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 Check the safety assembly regularly.

13.2 Descaling the flanged immersion heater

f Descale the flanged immersion heater only after it has been
removed.
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13.3 Removing the flanged immersion heater

Remedy
Replace the thermostat and
press the high limit safety
cut-out reset button.
Press the reset button.
Check the contactor and
replace if required.
ment or flanged immersion
heater.
Limit the maximum tem-
perature of the indirect
coil.
1 Threaded extraction holes M12
f Use the threaded extraction holes to release the flange plate
Clean the valve seat.
13.4 Replacing the heating elements and protective
1
1 Protective pipe
2 Heating element
3 Flange plate
f When installing heating elements or a protective pipe, en-
1 Corrosion resistor 390 Ω
f Connect the heating elements with the cylinder via the corro-
1
from the flange connector.
pipe
1
2
3
sure that the components are electrically isolated from the
flange.
1
sion resistor.
1
FCR 21 | 19