6 720 817 545 (2016/02) Optiflow
18 | Maintenance (only by authorised service technician)
Water filter
▶ Close the cold water inlet isolation valve.
▶ Unscrew the water filter on the cold water pipe.
▶ Clean the water filter.
-or-
▶ Replace if required
Fig. 11 Water filter
6.2 Replacement of the fuse (electronic control
unit)
▶ Open the electronic control unit.
▶ Remove the PCB from the electronic control unit.
▶ Replace the fuse located in the corner of the circuit board.
Fig. 12 Fuse replacement
6.3 Start-up after completion of maintenance
▶ Re-tighten all of the connections.
▶ Check the burner pressure.
▶ Check air tightness of the flue circuit with the front cover
fitted.
▶ Check that there are no gas or water leaks.
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