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9 Troubleshooting
9.6
Preparing the repair work
1.
Decommission the product.
2.
Disconnect the product from the power mains.
3.
Remove the front casing. (→ Page 10)
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 29).
8.
Ensure that water does not drip on live components
(e.g. the electronics box).
9.
Use only new seals.
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.
Remove the compact thermal module. (→ Page 29)
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 31)
24
9.7.2
Replacing the fan or gas valve
1
2
3
4
5
7
1.
Remove the air intake pipe.
2.
Remove the plug from the gas valve (7).
3.
Remove the plug from the fan motor (6) by pushing in
the latching lug.
4.
Unscrew the connection from the gas valve (8).
5.
Unscrew the three screws (2)-(4) between the mixture
pipe (1) and the fan flange.
1
2
6.
Remove the entire fan/gas valve unit from the product.
7.
Unscrew both fixing screws (1) on the gas valve and
remove the fan from the gas valve.
8.
Replace the defective fan or the defective gas valve.
9.
Install the gas valve and the fan in the same position as
before. Use new seals for this.
10. Screw the fan to the gas valve.
11. If you had removed the gas pipe, screw the cap nut
of the gas pipe (2) only loosely to the gas valve. Only
tighten the cap nut on the gas valve after the installa-
tion work has been completed.
12. Refit the entire fan/gas valve unit in reverse order. You
must use a new seal (5) for this.
13. Ensure that the order in which the three screws are
screwed in between the fan and the mixture pipe cor-
responds to the numbering (3), (2) and (4).
Installation and maintenance instructions ecoTEC pure 0020258016_00
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2
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