I've got this Daikin unit at my work. The cooling works perfectly but I can't seem to make heating work. I don't know the model of the unit. : r/hvacadvice
DAIKIN VRV ERROR CODE E4 - YouTube
How to solve error E4-01 Daikin VRV4 - YouTube
DAIKIN LINK, HORIZONTAL VANE FTXS25BVMB - LA CENTRALE PRO