ecoTEC pro - Vaillant

14 Replacing components
b Caution.
Risk of damage to the boiler.
Mineral oil-based lubricants may damage
the seals. The seals should therefore not be
lubricated.
> Only use water or commercially available
soft soap, if necessary, to assist with
installation.
> Install the new heat exchanger in the reverse order.
> Replace the seals.
> Insert the flow and return connections into the heat
exchanger as far as they will go.
i Make
sure that the brackets are seated correctly
on the flow and return connections.
> Reinstall the compact thermal module.
(¬ section 12.3.6).
> Fill and purge the boiler and, if necessary, the heating
installation (¬ section 10.5).
14.6 Replacing the PCB and/or the display
e Danger!
Risk of death from electric shock!
Mains connection terminals L and N remain
live even if the continuous voltage on/off
switch is turned off.
> Before carrying out repair work on the
boiler, switch the boiler off using the on/
off button.
> Disconnect the boiler from the power
mains by disconnecting the mains plug
or by de-energising the boiler via a partition
with a contact opening of at least
3 mm (e. g. fuses or power switches).
b
Caution.
Risk of material damage caused by incorrect
repairs.
Using an incorrect spare part display can
cause damage to the electronics.
> Before replacing, check that the correct
spare part display is available.
> ONLY fit the correct spare part display.
i Comply
with the assembly and installation
instructions provided with the spare parts.
14.6.1 Replacing either the display or the PCB
> Replace the PCB or display according to the assembly
and installation instructions supplied.
If you are replacing only one of the two components (PCB
or display), the parametrisation functions automatically. By
switching on the boiler, the new component takes over the
previously set parameters from the unreplaced component.
14.6.2 Replacing the PCB and the display at the
same time
Setting the appliance type
> Set the correct value for the appliance type in accordance
with ¬ table 14.1 for diagnostic code D.093.
After confirmation, the display restarts itself automatically.
ecoTEC pro
Device specific
number (DSN)
24 (VUW GB 246/5-3) 7
28 (VUW GB 286/5-3) 8
14.1 Device specific numbers for the appliance types
The electronics are now set to the appliance type and the
parameters of all adjustable diagnosis codes are set to
default settings.
> Make the system-specific settings (¬ section 11).
62 Installation and maintenance instructions ecoTEC pro 0020129672_03