Troubleshooting; Checking Service Messages; Rectifying Faults; Calling Up And Clearing The Fault Memory - Vaillant ecoTEC plus Installation And Maintenance Instructions Manual

9 Troubleshooting

▶
Pass all of the instructions and documentation for the
product to the operator for safe-keeping.
▶
Inform the operator about measures taken to ensure the
supply of combustion air and flue gas guiding, and in-
struct the operator that he must not make any changes.
▶
Inform the operator that they must not store or use ex-
plosive or highly flammable substances (such as petrol,
paper or paint) in the installation room of the product.
▶
Complete and sign off the Benchmark commissioning
check list.
▶
Complete and sign off the guarantee documentation.
9 Troubleshooting
9.1

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 .
Conditions: 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. (→ Page 30)
Note
If no fault message is present, the product will
automatically switch back to normal operating
mode after a certain time.
9.2

Rectifying faults

▶
If fault messages (F.XX) appear, rectify the fault by re-
ferring to the table in the appendix or using the Function
menu (→ Page 36) and the Check programs (→ Page 22).
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 remedy the fault and the fault recurs
despite fault clearance attempts, contact customer ser-
vice.
9.3

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.
30
9.4

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. Set the diagnostics code to 1, and confirm by pressing
.
9.5

Preparing the repair work

1. Decommission the product.
2. Disconnect the product from the power mains.
3. Remove the front casing. (→ Page 13)
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.
9.5.1 Procuring spare parts
The original components of the product were also certified
as part of the declaration of conformity. If you do not use cer-
tified Vaillant original spare parts for maintenance or repair
work, this voids the conformity of the product. We therefore
strongly recommend that you fit Vaillant genuine spare parts.
Information about available Vaillant original spare parts is
available by contacting the contact address provided on the
reverse of this document.
▶
If you require spare parts for maintenance or repair work,
use only Vaillant genuine spare parts.
9.6

Replacing defective components

9.6.1 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 plus 0020209593_01
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