0020244997_07 Installation and maintenance instructions
45
5.
Purge the heating installation. (
12.16 Checking the filling pressure of the heating
installation
1.
Check the filling pressure of the heating installation, top
it up with heating water, if necessary, and purge it.
2.
Fill the heating installation. (
3.
Purge the heating installation. (
12.17 Checking the quality of the heating water
▶
Check the quality of the heating water: Clarity (clouding),
correct inhibitor and pH value. (
12.18 Completing inspection and maintenance
work
▶
Start a test operation after the maintenance.
▶
Check the heating mode and, if required, the domestic
hot water generation (if available).
▶
Carry out a gas family check. (
▶
Check the gas flow pressure. (
▶
Check and, if required, adjust the CO
₂
content and the
CO/CO
₂
ratio (air ratio setting). (
▶
If required, reset the maintenance interval. (
▶
Install the front casing.
▶
Fill out the relevant Service Record section in the Bench-
mark Checklist.
12.19 Checking the product for leak-tightness
▶
Check that the product is leak-tight. (
13 Troubleshooting
13.1
Checking service messages
appears if you have set a maintenance interval, for ex-
ample, and this has passed or a service message is issued.
The product is not in fault mode.
▶
Navigate to
Menu
→
Live monitor
and confirm by press-
ing
.
Condition
:
S.40
is displayed
The product is in Comfort protection mode. The product con-
tinues to run with restricted comfort after it has detected a
fault.
▶
To establish whether or not a component is defective,
read the fault memory. (
Note
If no fault message is present, the product will
automatically switch back to normal operating
mode after a certain time.
13.2
Eliminating faults
▶
If fault messages (
F.XX
) occur, eliminate the faults by
checking the table in the appendix or using the function
menu or the check programmes.
Overview of fault codes (
Function menu
–
Overview (
Check programmes
–
Overview (
If several faults occur at the same time, the display shows
the corresponding fault messages for two seconds each in
alternation.
▶
Press
(max. three times) to restart the product.
▶
If you are unable to eliminate the fault and the fault re-
curs despite reset attempts, contact customer service.
13.3
Calling up and clearing the fault memory
The last 10 fault messages are stored in the fault memory.
▶
Navigate to the
Fault list
menu.
◁
The display shows the number of faults that have
occurred, the fault numbers and the corresponding
plain text display.
▶
Press
or
to call up individual fault messages.
▶
Press
twice to delete the fault list.
13.4
Resetting parameters to factory settings
1.
Navigate to
Menu
→
Installer level
→
Diagnostics
menu
→
D.096 Reset to factory settings?
and con-
firm by pressing
.
2.
Set the diagnostics code to 1, and confirm by pressing
.
13.5
Preparing the repair work
1.
Decommission the product.
2.
Disconnect the product from the power grid.
3.
Remove the front casing. (
4.
Close the gas stopcock.
5.
Close the service valves in the heating flow and in the
heating return.
6.
Close the service valve in the cold water pipe.
7.
Drain the product if you want to replace water-carrying
components of the product.
8.
Ensure that water does not drip on live components
(e.g. the electronics box).
9.
Use only new seals.
13.5.1 Procuring spare parts
The original components of the product were also certified
by the manufacturer as part of the declaration of conformity.
If you use other, non-certified or unauthorised parts during
maintenance or repair work, this may void the conformity of
the product and it will therefore no longer comply with the
applicable standards.
We strongly recommend that you use original spare parts
from the manufacturer as this guarantees fault-free and safe
operation of the product. To receive information about the
available original spare parts, contact the contact address
provided on the back page of these instructions.
▶
If you require spare parts for maintenance or repair
work, use only the spare parts that are permitted for the
product.
