\version "2.16.2"

Chords = \new ChordNames {
  \set chordChanges = ##t
  \chordmode { e1 e1 }
}

\score { % this score has a chord symbol on the 2nd line
  <<
    \Chords
    \new Staff {
      \repeat unfold 8 e'8 \break
%      \acciaccatura fis'8
      \repeat unfold 8 e'8
    }
  >>
}

\score { % this score is missing a chord symbol on the 2nd line
  <<
    \Chords
    \new Staff {
      \repeat unfold 8 e'8 \break
      \acciaccatura fis'8
      \repeat unfold 8 e'8
    }
  >>
}