If the UV indicator on top of the EF filter head is not lighting up, disassemble
the EF and remove
the UV bulb from the EF filter head. Visually inspect the
bulb to check that no
filaments have broken inside the UV bulb.
Re-insert the UV bulb, ensuring that it is seated correctly in its holder and re-
assemble the EF. Test the UV bulb again by pressing the red switch on top of the EF
filter head.
If the UV indicator is still not lighting up, it is recommended to try a new UV bulb.
If the UV indicator still does not light up with a new UV bulb inserted, we
recommend you contact the supplier of the EF
filter.
