Troubleshooting 10
0020239015_05 ecoTEC plus Installation and maintenance instructions
21
▶
If you require spare parts for maintenance or repair
work, use only the spare parts that are permitted for the
product.
10.3
Calling up 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.
10.4
Deleting the fault memory
1.
Navigate to the
Fault list
menu.
2.
Press
twice to delete the fault list.
10.5
Preparing the repair work
1.
Decommission 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.
Make sure 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 components.
10.6
Replacing defective components
10.6.1 Replacing the burner
1.
Remove the gas-air mixture unit. (
→
Page 23)
2.
Remove the burner seal.
3.
Remove the burner.
4.
Install the new burner complete with new seal on the
heat exchanger.
5.
Install the gas-air mixture unit. (
→
Page 25)
10.6.2 Replacing the gas-air mixture unit
1.
Remove the gas-air mixture unit. (
→
Page 23)
2.
Install the new gas-air mixture (
→
Page 25).
10.6.3 Replacing the heat exchanger
1.
Remove the side section. (
→
Page 9)
2.
Remove the gas-air mixture unit. (
→
Page 23)
E
1
2
D
B
C
A
3.
Remove the flow pipe
(1)
.
4.
Remove the return pipe
(2)
.
B
A
5.
Remove the gas pipe.
B
3
4
A
6.
Undo the clip underneath the condensate tray
(4)
.
7.
Undo the two screws
(3)
.
