Checking Service Messages; Eliminating Faults; Checking The Fault Memory; Resetting Parameters To Factory Settings - Vaillant ecoTEC exclusive 835 Installation And Maintenance Instructions Manual

13.2

Checking service messages

▶
To obtain further information, call up the Live monitor.
(→ Page 25)
Condition: S.40 is displayed
The product is in Comfort protection mode. The product has
detected a temporary fault and continues to run with restric-
ted comfort. The product switches back to the normal operat-
ing mode.
▶
To establish whether or not a component is defective,
read the fault memory. (→ Page 40)
Note
If no fault message is present, the product will
automatically switch back to normal operating
mode after a certain time.
Condition: S.86 is displayed
The product remains in comfort safety mode and does not
switch back to normal operating mode.
▶
Check the component that is mentioned and, if required,
replace it.
▶
To establish whether or not a component is defective,
read the fault memory (→ Page 40).
appears if you have set a maintenance interval, for ex-
ample, and this has passed or a service message is issued.
13.3

Eliminating faults

▶
If fault messages (F.XX) appear, eliminate the fault by
referring to the table in the appendix or using the Func-
tion menu (→ Page 36) and the Check programmes
(→ Page 27).
Overview of fault codes (→ Page 54)
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.
13.4

Checking the fault memory

If faults have occurred, the last ten (max.) fault messages
are available in the fault memory.
▶
Navigate to Menu → Installer level → Fault list and con-
firm by pressing .
◁
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.
40
13.5

Resetting parameters to factory settings

Navigate to Menu → Installer level → Diagnostics
1.
menu → D.096 Reset to factory settings? and con-
firm by pressing
2. Press to set the value to 1 and confirm by pressing
.
13.6

Preparing the repair work

1. Temporarily decommission (→ Page 43) the product.
2. Disconnect the product from the power grid.
3. Remove the front casing. (→ Page 17)
4. Close the service valves in the heating flow, in the
heating return and in the cold water pipe.
5. Close the gas stopcock.
6. Drain the product (→ Page 38) if you want to replace
any of the product's water-carrying components.
7. Make sure that water does not drip on live components
(e.g. the electronics box).
8. Use only new seals.
13.6.1 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.
13.7

Replacing defective components

13.7.1 Replacing the burner
1. Remove the compact thermal module. (→ Page 36)
2
2. Undo the four screws (1) on the burner.
3. Remove the burner.
4. Install a new seal (2) on the new burner.
5. Install the compact thermal module. (→ Page 38)
Installation and maintenance instructions ecoTEC exclusive 0020193968_05
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