The ORCA (Oscillations Research with Cosmics in the Abyss) detector is currently being deployed in the Mediterranean sea, near Toulon (France). With an instrumented volume of 8 Mton, this water Cherenkov detector is the KM3NeT detector with the highest granularity optimised to observe atmospheric neutrinos in the GeV range. Even though the primary goal of ORCA is to determine the neutrino mass ordering, the detector is also well suited to perform indirect searches for dark matter signals coming from very massive objects like the Sun. A popular set of dark matter candidates are those based on WIMPs (Weakly Interactive Massive Particles). WIMPs decay or annihilate into standard model particles producing also neutrinos which propagate to the detector in the Earth. The ORCA analysis for WIMP searches from the Sun, considering several physics channels, will be presented and the results in terms of sensitivity to neutrino flux, spin-dependent and spin-independent scattering cross section reported.