Calling Up And Clearing The Fault Memory; Resetting Parameters To Factory Settings; Preparing The Repair Work; Replacing Defective Components - Vaillant ecoFIT sustain 615 Installation And Maintenance Instructions Manual

10 Troubleshooting
10.3

Calling up and clearing the fault memory

The last 10 fault messages are stored in the fault memory.
▶
Call up the installer level. (→ Page 14)
▶
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
.
10.4

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
.
10.5

Preparing the repair work

1. Switch off the product.
2. Disconnect the product from the electrical installation.
3. Remove the front casing.
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 if you want to replace water-bearing
components of the product.
8. Ensure that water does not drip on live components
(e.g. the electronics box).
9. Use only new seals and O-rings. Do not use any addi-
tional sealing materials.
10.6

Replacing defective components

10.6.1 Replacing the burner
1. Remove the gas-air mixture unit. (→ Page 25)
2. Remove the two burner seals.
3. Remove the burner.
4. Insert the new burner.
5. Insert two new burner seals in the burner cover.
6. Install the gas-air mixture unit. (→ Page 27)
10.6.2 Replacing the gas-air mixture unit
1. Remove the gas-air mixture unit. (→ Page 25)
2. Install the new gas-air mixture (→ Page 27).
10.6.3 Replacing the heat exchanger
1. Remove the front casing. (→ Page 9)
2. Remove the gas-air mixture unit. (→ Page 25)
22
1
B
3. Remove the gas pipe (1).
A
4. Remove the temperature sensor (3).
5. Remove the upper clip (1).
6. Remove the lower clip (4).
7. Remove the supply pipe (2).
1
A
2
8. Remove the upper clip (1).
9. Remove the lower clip (3).
10. Remove the return pipe (2).
Installation and maintenance instructions ecoFIT sustain 0020277252_00
A
1
2
2
B
3
2 3
B
4