6 720 821 652 (2017/05) CRC200
22 | Troubleshooting
8.2 Eliminating displayed faults
A fault in your system is
indicated on the display of
the user interface. If there
are multiple faults, the fault
with the highest priority will
be displayed. The fault code
and sub-code are displayed
alternately. The codes
inform your contractor about the possible cause. Confirm a
fault (press the dial) to switch to the room temperature display.
The fault is displayed again automatically after 60 minutes if it
is still active.
The cause can be a fault on the user interface, in a component,
in an assembly or on the heat source.
The system keeps operating as much as possible; in other
words, heating of the home can continue.
If a fault persists or is not listed here:
▶ Call an authorized contractor or customer service and give
them the fault code and sub-code, as well as the ID no. of
the user interface.
NOTICE: Risk of system damage due to
freezing! The system can freeze up if it is taken
out of service due to a fault shutdown.
▶ Use Tab. 23 to check if the fault can be
fixed.
▶ If the fault cannot be fixed, contact your
contractor immediately.
6 720 811 158-35.1O
Fault
Fault
code
Sub-
code
Cause or fault
description
Testing sequence/Cause Measure
Display is blank System is switched off. ▶ Switch on the system.
The power supply to the user interface has
been interrupted.
▶ Check that the user interface is
correctly seated in its wall bracket.
A6x 1010 No communication via
BUS connection EMS in
heating zone x
– ▶ Check that the user interface is
correctly seated in its wall bracket.
A6x 1038 Invalid time/date in
heating zone x
Date/time not yet set Set date/time
Prolonged loss of power supply Avoid voltage failures
A6x 3061
3062
3063
3064
No communication with
controller in heating
zone x
– ▶ Check that the user interface is
correctly seated in its wall bracket.
Hxx – Maintenance required. The system keeps
operating as far as possible.
▶ Make arrangements to have the
system serviced by your contractor.
H07 1017 Water pressure too low Water pressure in the system is too low.
This level is only displayed if your system is
equipped with a digital pressure sensor.
▶ Top up the heating water as described
in the heat source operating
instructions.
Table 23 Table with fault and service displays
__ _
Table 24 Your contractor must enter the ID no. of the user interface here during installation.
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