  High-resolution mapping of the hot gas in galaxy clusters is a key tool for
cluster-based cosmological analyses. Taking advantage of the NIKA2 millimeter
camera operated at the IRAM 30-m telescope, the NIKA2 SZ Large Program seeks to
get a high-resolution follow-up of 45 galaxy clusters covering a wide mass
range at high redshift in order to re-calibrate some of the tools needed for
the cosmological exploitation of SZ surveys. We present the second cluster
analysis of this program, targeting one of the faintest sources of the sample
in order to tackle the difficulties in data reduction for such faint, low-SNR
clusters. In this study, the main challenge is the precise estimation of the
contamination by sub-millimetric point sources, which greatly affects the tSZ
map of the cluster. We account for this contamination by performing a joint fit
of the SZ signal and of the flux density of the compact sources. A prior
knowledge of these fluxes is given by the adjustment of the SED of each source
using data from both NIKA2 and the \textit{Herschel} satellite. The first
results are very promising and demonstrate the possibility to estimate
thermodynamic properties with NIKA2, even in a compact cluster heavily
contaminated by point sources.
