Deleting The Fault Memory; Resetting Parameters To Factory Settings; Preparing The Repair Work; Replacing Defective Components - Vaillant ecoTEC sustain 24 Installation And Maintenance Instructions Manual

13.4

Deleting the fault memory

1. Clear the fault memory using diagnostics code d.94.
2. Set a diagnostics code. (→ Page 26)
13.5

Resetting parameters to factory settings

1. Reset all parameters to the factory settings using dia-
gnostics code d.96.
2. Set a diagnostics code. (→ Page 26)
13.6

Preparing the repair work

1. Decommission the product.
2. Disconnect the product from the power grid.
3. Remove the front casing. (→ Page 18)
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 to replace hydraulic components
(→ Page 39).
8. Ensure that water does not drip on live components
(e.g. the electronics box).
9. Use only new seals and o'ring. Do not use additional
compounds.
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. Undo the four screws (1) on the burner.
40
2. Remove the burner.
3. Install a new seal (2) on the new burner.
13.7.2 Replacing the fan or gas valve assembly
1
2
3
4
5
7
1. Remove the air intake pipe.
2. Remove the plug from the gas valve assembly (7).
3. Remove the plugs (6) and (9) from the fan motor by
pushing in the latching lug.
4. Unscrew the connection from the gas valve assembly
(8).
5. Unscrew the three screws (2)-(4) between the mixture
pipe (1) and the fan flange.
6. Remove the entire fan/gas valve assembly unit from the
product.
7. Unscrew both fixing screws (1) on the gas valve
1
assembly and remove the fan from the gas valve
2
assembly.
8. Replace the defective fan or the defective gas valve
assembly.
9. Install the gas valve assembly and the fan in the same
position as before. Use new seals for this.
10. Screw the fan to the gas valve assembly.
11. If you had removed the gas pipe, screw the union nut of
the gas pipe (2) only loosely to the gas valve assembly.
Only tighten the union nut on the gas valve assembly
after the installation work has been completed.
Installation and maintenance instructions ecoTEC sustain 0020253094_05
1
2
8
6
9