Rectifying Faults; Calling Up The Fault Memory; Deleting The Fault Memory; Resetting Parameters To Factory Settings - Vaillant ecoTEC sustain 24 Installation And Maintenance Instructions Manual

9.2

Rectifying faults

▶
If fault codes (F.XX) are present, refer to the table in the
appendix for advice or use the check programme(s).
Overview of fault codes (→ Page 39)
Check programmes – Overview (→ Page 34)
If several faults occur at the same time, the fault codes are
shown alternately on the display.
Resetting the product:
▶
Press and hold the button for more than three
seconds.
◁
The product restarts.
▶
If you are unable to clear the fault code and it reappears
despite several fault clearance attempts, contact cus-
tomer service.
9.3

Calling up the fault memory

The last ten fault codes are stored in the fault memory.
▶
Call up the installer level. (→ Page 17)
◁
d.-- is shown in the display.
▶
Press the button 2 times.
◁
F.XX is shown in the display.
▶
Press the and buttons to call up the fault codes.
Overview of fault codes (→ Page 39)
◁
The fault code and the time of occurrence are shown
alternately on the display.
▶
Press .
◁
The display switches to the basic display.
9.4

Deleting the fault memory

1. Clear the fault memory using diagnostics code d.94.
2. Set a diagnostics code. (→ Page 17)
9.5

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 17)
9.6

Preparing the repair work

1. Decommission the product.
2. Disconnect the product from the power mains.
3. Remove the front casing. (→ Page 11)
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 to replace hydraulic components
(→ Page 30).
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.
0020253094_01 ecoTEC sustain Installation and maintenance instructions
9.6.1 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 reverse of these instructions.
▶
If you require spare parts for maintenance or repair
work, use only the spare parts that are permitted for the
product.
9.7

Replacing defective components

9.7.1 Replacing the burner
1. Undo the four screws (1) on the burner.
2. Remove the burner.
3. Install a new seal (2) on the new burner.
Troubleshooting 9
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