Victron phoenix multi plus inverter

[davidb]

On our boat we have a Victron phoenix multi plus inverter 12 2500 120 and seem to have a random fault which cuts it out maybe once a day - all three red LEDs come on at once - Overload, Low Batt and temperature.  It is in the engine room (not ideal, I know) but has not been over 40 °C since last summer. I plan to rig a fresh air duct to feed air in below it before this summer. I don't see this fault in the manual I have downloaded (can't find the actual manual on their website): https://www.victronenergy.com/Manuals/PhoenixMulti/UKISM010004000-rev08.pdf

Anyone have experience of this, please?

 

[Tracy D'arth]

Check all the connections to the terminal blocks at the bottom of the main pcb.  I have seen the soldering around these terminals degrade and cause all sorts of odd faults before they finally burn out the connections on the pcb.

[Jen-in-Wellies]

Disconnect the battery cable and the mains input before taking the cover off. There will be mains voltages and big charged up capacitors inside. Touch as little as possible, even when disconnected.

[pearley]

For LED definitions you are better off downloading the Victron Toolkit App, not that it would help in your case as I can't see 3 red LEDs on together.

But the app does give every possible normal combination together with explanation of likely reasons.

 

https://www.victronenergy.com/blog/2014/10/02/victron-toolkit-a-new-app-for-android-and-iphone-users/

Edited April 26, 2023 by pearley

[Quattrodave]

1 hour ago, Tracy D'arth said:

Check all the connections to the terminal blocks at the bottom of the main pcb.  I have seen the soldering around these terminals degrade and cause all sorts of odd faults before they finally burn out the connections on the pcb.

 

I've come access this a few times too. Remove as much of the original solder as possible. Reflow the solder on those joints with good quality solder and flux, clean off with isopropyl.

[davidb]

Thanks all for the excellent advice, I'll be back on board on Friday and not use it until checked. Also thanks for the safety tip..

[GUMPY]

I can't be sure as I am not on the boat to test it but don't all 3 lights flash up if power is applied and the unit is switched on. This could indicate a dodgy mains input.

[davidb]

It might do, but we are not on mains at present, thanks