[CI]2–1 spectra and moment-0 maps for component 1, component 2, and the total [CI]2–1 and CO(7–6) emission. Top row: the spectra extracted from beam-sized areas for component 1, component 2, and the total. The areas from which the spectra of component 1 and component 2 are extracted do not overlap. The Lorentzian profile for the component 1 [CI]2–1 line (top left), the double Gaussian profile for the component 2 [CI]2–1 line (top middle), and the single Gaussian fits for the two CO(7–6) lines are over-plotted as black curves. The sum of the Lorentzian and Gaussian profiles is over-plotted in black in the total spectrum (top right). The dashed lines indicate the 0-velocity of the [CI]2–1 frequency at z = 2.1606, and the dotted lines indicate the 0-velocity for the CO(7–6) frequency at the same redshift. This redshift is in agreement with the redshift determined from the CO(1–0) line (Emonts et al. 2013). The dotted-dashed line indicate the 0-velocity of the [CI]2–1 frequency at z = 2.156, determined from the HeII λ1640Å line (which, as a non-resonant line, should represent the systemic velocity of the AGN, Humphrey et al. 2008). Bottom row: the moment-0 maps of the [CI]2–1 emission from component 1 (bottom left), component 2 (bottom middle), and the total (bottom right) [CI]2–1 emission and zoom-ins of the centres of the images. The total [CI]2–1 moment-0 maps is overlaid with [CI]2–1 line contours of component 1and 2. The blue and red crosses indicate the peaks of the [CI]2–1 emission of component 1 (blue) and component 2 (red).