Replacing Electronics And Display - Vaillant ecoTEC SERIES Instructions For Installation And Servicing

Fig. 9.6 Primary heat exchanger holder
• Disconnect the plug-in connection (2) of the thermal
fuse in the primary heat exchanger.
• Remove the three screws (3) on the primary heat
exchanger holder.
• Turn the holder to the side around the rivet (1), pull
the primary heat exchanger downwards to the right
and remove it from the appliance.
• Mount the new primary heat exchanger in reverse
order and replace the seals.
Caution!
Risk of damaging the primary heat exchanger!
Neither loosen nor retighten the four screws
(Fig. 9.5, Pos. 4).
Caution!
Insert the seal rings for the flow and return pipe
on the primary heat exchanger with a suitable
lubricant. Insert the flow and return connection
in the primary heat exchanger as far as they will
go and make sure the clamps are fitted correctly
on the flow and return pipe (see Fig. 9.5).
• Fill and vent the boiler as required.
• After completing the work, check for gas and water
leaks and perform a function check (see section 7.6).
Instructions for installation and servicing ecoTEC 839592_12
9.6

Replacing electronics and display

Danger!
Before replacing the component, comply with
the safety instructions in Section 9.1.
• Comply with the assembly and installation manuals
provided with the spare parts.
Replacing display or electronics
If you are replacing only one of the two components, the
parameter adjustment functions automatically. On turning on
1
the appliance, the new component takes over the previously
2
set parameters from the components that are not replaced.
3
Replacing display and electronics
When replacing both components, after being turned on,
the appliance goes to fault and displays the error
message "F70".
• In the second diagnostic level, under the diagnostic
number "d.93" enter the number of appliance variant
according to Table 9.1 (see section 8.1.2).
The electronics is now set to the appliance type and the
parameters of all adjustable diagnostics numbers
correspond to the factory settings.
Appliance
ecoTEC plus 612
ecoTEC plus 615
ecoTEC plus 618
ecoTEC plus 624
ecoTEC plus 630
ecoTEC plus 637
ecoTEC plus 824
ecoTEC plus 831
ecoTEC plus 837
ecoTEC pro 24
ecoTEC pro 28
Table 9.1 Device specific numbers
Parts replacement 9
Device specific number
0
1
2
3
4
5
6
7
8
7
0
57