6 720 821 652 (2017/05)CRC200
Troubleshooting | 21
Your system may be set to three different types of control
( chapter 2.2, page 4).
With weather-compensated control (including with room
temperature influence), the heat appliance can still operate
even if the measured room temperature is higher than the set
room temperature. Adjacent rooms are hence always
sufficiently heated without their own remote-control.
Why does the heating not shot off even though the outside
temperature has reached the set temperature threshold
set for summer shutdown?
Summer shutdown ( ) based on the outside temperature
takes the thermal inertia of the heated building mass into
account (damping due to building type). Therefore, when the
temperature is reached during the transitional period, it takes a
few hours before switchover actually occurs.
8 Troubleshooting
8.1 Eliminating “sensed” faults
A “sensed” fault can have various causes, which can usually be
eliminated by taking simple steps.
If it is too cold or hot for you, the following table will help you
eliminate these “sensed” faults.
Problem Possible cause Measure
Required room
temperature not
achieved
Temperatures set
too low.
Set the required
room temperatures
higher.
System in summer
operating mode
().
Switch the system
to winter operating
mode
( chapter 4.1,
page 7).
Supply temperature
controller on heat
source set too low.
Set supply
temperature
controller higher
( operating
instructions of the
heat source).
Air in the system. Bleed all air from the
radiators and
system.
Heat-up takes
too long
Wrong heating zone
response.
Call approved
contractor or
customer service.
Table 22 Eliminating “sensed” faults
Required room
temperature
greatly exceeded
Radiators become
too hot.
Set thermostat(s) in
adjoining rooms
lower.
Set the required
room temperature
for Heating lower.
Unfavorable user
interface installation
location, e. g.
external wall, near
window, in draft, ...
Call approved
contractor or
customer service.
Excessive room
temperature
fluctuations
Temporary influence
of external heat on
the room, e. g. from
solar exposure,
room lighting, TV,
fireplace etc.
Call approved
contractor or
customer service.
Temperature
rises instead of
dropping
Incorrect time set. Set the time.
Room
temperature too
high during
Setback
operating mode
The building retains
a lot of heat.
Set an earlier
switching time for
Setback.
Incorrect or no
control
For instance,
connection between
user interface and
heat source faulty.
Call approved
contractor or
customer service.
Domestic hot
water tank does
not heat up
Hot water
temperature
1)
on heat
source set too low.
Set the hot water
temperature
1)
higher.
Time program for
heating set and
water heating in
automatic mode.
Change time
program for heating
or operating mode
for water heating.
The set system
configuration for hot
water heating does
not fit the heating
system.
Call approved
contractor or
customer service.
The hot water at
the taps is not
reaching the
required
temperature.
Mixer set lower than
the required hot
water temperature.
If you are in doubt,
contact your
contractor to come
and check the mixer
setting.
1) See operating instructions of the heat source for further information.
Problem Possible cause Measure
Table 22 Eliminating “sensed” faults
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