Repair
Replacing electronic control board with button prints
Tools:
-Torx screwdriver T10
The service engineer must be earthed using an earthing strap!
)Only touch button prints with dedicated gloves to avoid oxydation.
Procedure:
1.Follow general disassembly (see page 16).
2.Detach prints of buttons "small cup" (30) and "large cup" (29) from upper chassis
(1).
3.Remove housing (28) from electronic control board (28).
4.Unplug NTC connector and all wires from electronic control board (28).
5.Unplug connector at flow meter (47).
6.Remove 2 screws (23) and replace defective electronic control board with button prints (29, 30).
7.Assemble in reverse sequence.
)Check for correct wiring of electronic control board (see pages 22, 23 or 24).
Service Manual EF 473 / EF 474
| 28 |
1 | 23 |
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| 30 |
| 29 |
21 | Version 1.0 en |
