12.16 Checking The Product For Leak-Tightness; 13 Troubleshooting; Checking Service Messages; Eliminating Faults - Vaillant ecoTEC pro VUW 6/5-3 Series Installation And Maintenance Instructions Manual

12.16 Checking the product for leak-tightness

▶
Check that the product is leak-tight. (→ Page 31)

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.
▶
Call up the Live Monitor. (→ Page 26)
Condition: S.46 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. (→ Page 37)
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 are displayed (F.XX), eliminate the fault
after checking the table in the appendix.
Check programmes – Overview (→ Page 48)
Overview of fault codes (→ Page 46)
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.
▶
Call up the installer level. (→ Page 26)
▶
Navigate to the fault codes.
◁
The number of faults that have occurred is shown in
the display and the faults that are currently called up
are displayed with their fault numbers F.xx.
▶
Press or to call up individual fault messages.
▶
To delete the entire fault list, navigate to diagnostics code
D.094 in the installer level.
▶
Set the diagnostics code to 1, and confirm by pressing
.
0020244995_04 ecoTEC pro Installation and maintenance instructions
13.4

Resetting parameters to factory settings

1. Navigate to diagnostics code D.096 in the installer level.
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 mains.
3. Remove the front casing. (→ Page 18)
4. Close the gas isolator cock.
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-bearing
components of the product.
8. Make sure 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.
13.6

Replacing defective components

13.6.1 Replacing the burner
1. Remove the compact thermal module. (→ Page 34)
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 36)
1
37