Bosch CW 800 - Removing a displayed fault

6 720 820 871 (2016/12) CR 400 | CW 400 | CW 800
44 | Eliminate fault
9.2 Removing a displayed fault
A fault in your solar system is indicated on the display of the
user interface.
Fig. 6 Fault display
If there are multiple faults, the fault with the highest priority will
be displayed. Fault codes and sub-codes are displayed. The
codes inform your contractor about the possible cause.
Confirm a fault (press the selector) to switch to the standard
display. The continued presence of the fault is indicated in the
info line. If the fault is still active, it can be displayed once again
by pressing the Back key.
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 far as possible; in other words,
heating of the home can continue.
DHW
cylinder does
not heat up.
DHW temperature
1)
at
heat source set too
low.
Set the DHW
temperature
1)
higher.
DHW temperature
1)
on heat source not set
too low.
Contact contractor to
check the settings at
the user interface.
If the DHW system is
controlled via a
module: flow
temperature
1)
at heat
source set too low.
Set flow
temperature
1)
higher.
DHW program
incorrectly set.
Set DHW program.
The DHW heating
configuration does not
suit this heating
system.
Contact contractor to
check the settings at
the user interface.
The DHW at
the draw-off
points is not
reaching the
required
temperature.
Mixer set lower than
the required DHW
temperature.
If you are in doubt,
contact your
contractor to come
and check the mixer
setting.
0 is
displayed
constantly in
the info
menu under
solar yield
even though
the solar
system is in
operation.
Solar system set
incorrectly.
Contact contractor to
check the settings at
the user interface.
1) See operating instructions of the heat source for further
information.
Problem Reason Solution
Table 39 Eliminating "sensed" faults
NOTICE: System damage due to frost! The
system can freeze up if it is taken out of service
due to fault shutdown.
▶ Use Tab. 40 to check if the fault can be
fixed.
▶ If the fault cannot be fixed, contact your
contractor immediately.
6 720 815 237-57.1O