Resetting The Fault Memory; Performing Diagnostics; Using Check Programmes; Resetting Parameters To Factory Settings - Vaillant ecoCOMPACT VCC4 Series Installation And Maintenance Instructions Manual

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Overview of fault codes (Applicability: ecoCOMPACT)
10.5

Resetting the fault memory

To delete the entire fault list, press
twice.
10.6

Performing diagnostics

You can use the function menu to actuate and test in-
dividual components of the product during the fault dia-
gnostics.
10.7

Using check programmes

You can also use check programmes (→ Page 22) for
troubleshooting.
10.8

Resetting parameters to factory settings

To reset all parameters simultaneously to the default
settings, set D.096 to 1.
10.9

Preparing the repair work

1.
Decommission the product.
2.
Disconnect the product from the power mains.
3.
Remove the front casing.
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 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.

10.10 Replacing defective components

10.10.1 Replacing the burner
1.
Remove the compact thermal module. (→ Page 32)
2.
Undo the four screws on the burner (1).
3.
Remove the burner.
4.
Fit the new burner with a new seal.
5.
Ensure that the cut-outs on the seal and burner are
aligned with the sight glass on the burner door.
6.
Install the compact thermal module. (→ Page 34)
0020181421_04 ecoCOMPACT Installation and maintenance instructions
10.10.2 Replacing the fan
(Delete, OK)
1.
Remove the air intake pipe.
2.
Remove the three plugs (1) and (6) from the gas valve.
3.
Remove the plug from the sensor on the Venturi jet (4)
by pressing on the locking lug.
4.
Remove the plug(s) (depending on the unit version) (8)
from the fan motor by pressing on the locking lug.
5.
Undo the two cap nuts (5) and (7) on the gas valve.
Hold on to the gas valve when loosening the cap nuts.
6.
Undo the three screws (3) between the mixer tube (2)
and the fan flange.
1
7.
Remove the assembly (which is made up of the fan,
Venturi jet and gas valve) from the unit.
8.
Loosen the gas valve's fixing screw (3) from the
bracket.
9.
Remove the gas valve from the retainer.
10. Remove the Venturi jet (2) and the gas connection pipe
(1) from the fan by turning the bayonet fitting on the
Venturi jet as far as it will go anti-clockwise and then
pulling the Venturi jet out of the fan.
Troubleshooting 10
1
2
3
4
5
6
7
1
3
8
2
37

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