Post by andrewglasspool on May 28, 2019 3:21:38 GMT
I have an SO 44i, the bow thrusters remain active (i.e can be turned on) even when the engine is off. I have located the relay that controls this but even with it out of the circuit I can stlll turn the bow thrusters on (and with the breaker switched to off) - so they are flattening the auxiliary batteries quickly as they are drawing power all the time. The fuse appear to be ok.
I have the boat manual, soft and hard copy, and the wiring diagrams in hard copy - but these do not show the bow thruster wiring. Does anyone have these for the 44i or a similar model as I suspect the installation will be common to the 45DS and other models.
on my 42i I can use the bow thruster with engine switched off, and I think they should only be drawing power when you actually switch them on to use them..just maybe your battery is past it’s sell by date!....In my Jeanneau manual there is no wiring diagram but if your bow thruster is max power then the manuals and wiring diagrams are available on the web site www.max-power.com/category/13-tunnel-thrusters..
Post by andrewglasspool on May 30, 2019 19:09:28 GMT
Thanks for posting the wiring diagrams.
The manual on mine says that they should only work with the engine on, the breaker under the port cabin bed has no voltage across it when closed unless the engine is on (ignition circuit live) but this seems a strange way to set it up. Open we see the battery voltage on both terminals it is closed when there is the full voltage across the breaker.
If it is closed we see the full voltage across the breaker.
The bow thrusters work with the breaker in either position, engine on or off....
Since we’re talking bow thruster batteries, I’d like to share an interesting SNAFU I learned this year the hard way.
My 42DS bowthruster battery ran low. But what I discovered was the battery cutoff switch in the aft cabin was turned off. ...but the bowthruster worked (albeit with low power).
What I discovered was the cutoff switch was preventing it from being charged...not from running the bowthruster. In hindsight since the battery is up front this makes sense but surprised me at the time.
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. The bow thruster batteries are charged from the Battery Combiner that receives alternator and 115V charger outputs.