I have a 2015 409. After 330 eng hours the ventilating fan became rather noisy. I stated up the engine to pull into mooring field. The bow thruster would not "activate". The next morning when starting the engine the charging light and alarm came on and stayed lite. The alternator was not charging. It tested ok. The 7.5 Amp fuse blew that feeds the blower motor and the 2 permissive relays for the bow thruster and the windlass. The circuit did not have a low resistance but the fuse blew again. The blower motor installed by the factory was a Jabsco 6.5 Amp that requires a 10 Amp fuse. When I replaced the fuse with a 10 Amp everything worked. The schematics in the manual details most of the wiring but not the interface between the Yanmar panel and engine/alternator wiring to really explain the reaction to the blown fuse. The feed wires for the key relay located on the port side of the engine is not shown on the schematics. The replacement fan is a Plastimo 5 Amp model. The Jabsco 6.5 Amp fan was used on a 409 built in March 2014 also. The Jeanneau 2019 51 and the Beneteau 2019 51.1 model have the Plastimo 5 Amp fans installed. Does anyone have the schematic even home made? i have not received any response from the dealer nor Jeanneau America re. this.
Hi Bill This is Jean-Luc. Something similar happened to me about 2 years ago and I discovered that the fuse that feeds/protects the fan also feeds the primary coil of the alternator( same circuit). Meaning no charging if the fuse has blown out because of the fan. I ended up replacing the fan and everything has been fine since. Hope it helps. Jl
HI, Jean-Luc so the original motor was the 6.5 Amp Jabsco? The replacement oe was the Plastimo 5 Amp? I did not see where the purple feed to the relay that goes to the Christec Battery Charge Isolation unit goes to the Yanmar instrument panel.