Checking The Product For Leak-Tightness; 11 Inspection And Maintenance; Using Original Seals; Observing Inspection And Maintenance Intervals - Vaillant ecoTEC plus Installation And Maintenance Instructions Manual

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8. Lift the heat exchanger up slightly and remove it to-
gether with the condensate tray.
9. Remove the ignition transformer (5).
10. Replace all the seals.
11. Install the new heat exchanger in reverse order.
10.5.4 Replacing the main PCB
A
1. Open the electronics box. (→ Page 12)
2. Pull all of the plugs out from the PCB.
3. Undo the clips on the PCB.
4. Remove the PCB.
5. Install the new PCB in such a way that it clicks into the
groove at the bottom and into the clip at the top.
6. Plug in the PCB plugs.
7. Close the electronics box.
0020238195_01 ecoTEC plus Installation and maintenance instructions
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Inspection and maintenance 11
10.5.5 Replacing the PCB for the user interface
A
1. Open the electronics box. (→ Page 12)
2. Pull the plug out of the PCB.
3. Undo the clips on the PCB.
4. Remove the PCB.
5. Install the new PCB in such a way that it clicks into the
groove at the bottom and into the clip at the top.
6. Plug in the PCB plug.
7. Close the electronics box.
10.6

Checking the product for leak-tightness

▶
Check that the product is leak-tight. (→ Page 19)

11 Inspection and maintenance

11.1

Using original seals

If you replace components, use only the enclosed original
seals; additional sealing materials are not required.
11.2 Observing inspection and maintenance
intervals
▶
Adhere to the minimum inspection and maintenance in-
tervals. The inspection may require maintenance to be
carried out earlier, depending on the results.
Inspection and maintenance work – Overview
(→ Page 25)
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