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freko asked

Victron Phoenix compact multi 12/800/35 how to use and setup.

Hi all, I am new to all this inverter stuff, I bought a second hand Victron Phoenix compact multi 12/800/35 at a good price. Would anyone have a guide on how to use and setup? I would like to connect a 300w solar panel to the inverter with two 100ah batteries to run some small tools in my shed and a laptop. I don't know anything about this inverter and if it is even working, I did connect a small 12v 7ah battery to see if it would power on. When I press the on switch the green Led light for 1 or 2 seconds and then goes off and the Red alarm Led comes on. Please, would someone send me a link or something like a setup user guide and wiring positions? It came with a plug and a 2-foot length of cable connected to AC in, and a long ethernet leads a small control panel. I don't know where the AC out connections are. Sorry but I am a Victron Noob. So be gentle. Thanks

Phoenix Invertervictron products
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klim8skeptic avatar image klim8skeptic ♦ commented ·

Hi Freko,

Have a look at https://www.victronenergy.com/ at their model range, find out which one you have and download the user manual.

It sounds like you have a Phoenix (inverter only) rather than a multiplus (inverter/charger).

For a solar charge controller a Smartsolar 100/20 would suit your 300w panel.

Your 7ah battery will have to be fully charged before you hook it up and test (then it would only be able to light up a 25w bulb for a few minutes), better to test with a larger battery, don't forget fuses!

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freko avatar image freko klim8skeptic ♦ commented ·

Hi, thanks for replying here is a link to my model user manual.

Mine is Victron Phoenix compact multi 12 800 35

https://www.victronenergy.com/upload/documents/Manual-ML-PhoenixMultiCompact.pdf

Charger and inverter, in the user manual it does not say how to fix the alarm fault it just says check the chart, what chart?

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freko avatar image freko klim8skeptic ♦ commented ·

Your browser does not support HTML5 video.Hi again, here is a photo of the inside of my unit and a video showing what happens when I switch on with only a battery connected.

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20190728-123922.jpg (1.7 MiB)
youcut-20190728-151529075.mp4 (4.7 MiB)
klim8skeptic avatar image klim8skeptic ♦ freko commented ·

A couple of dodgy things.

Thin wire twisted around the terminal bolt is bad, use some 16mm (6 awg) with a proper crimp lug. Bolt onto the top of the 200a fuse on the left.

The ac in/out are via the GST-18 sockets. Some one has hacked (?) the ac connection and used a terminal block.

The bottom plate is missing, electrocution hazard.

-------------------------------------------------

Page 7 + 8 of the manual explain led fault codes. The trouble shooting table page 21 + 22 gives further explanation.

Further details about input connections/diagrams are found at the end of the manual.

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freko avatar image freko klim8skeptic ♦ commented ·

This seems easy for you it is all double dutch to me. I removed the bottom plate to test the 200a fuse, What would have been where the terminal block is now?

I wrapped the small battery cables around the posts just to make the video, showing what happened when I switched it on.

Do you have any answers for what may be wrong or faulty why the on switch come on green for 2 seconds and then goes off and the alarm Led comes on?

I am looking for support, help I thought that's what the Forum is for.

I don't understand why the red alarm Led comes on, in the manual, it says it is Overload problem, but I don't have any load connected. It does not say where to check for faults why the alarm is on.

As I said I never worked on these things before, so I need to know what cable goes where?

Cheers,

Paul.

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klim8skeptic avatar image klim8skeptic ♦ freko commented ·

Change the dip switches for S1 and S2. Look at page 16.

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freko avatar image freko klim8skeptic ♦ commented ·

Thanks but I already did that, S1, S2 are only for the control panel which connects via the ethernet cable, connected or not connected.

I did read the user manual and it never why the alarm was on, it just said overload, Do you think one of the fuses or Mosfet is at fault, I do know how to check a fuse but not a Mosfet or whatever they call those things with the 3 legs. Lol. I spent over 20 years as a mechanical fitter technician but never worked on electronics.

There must be some reason with the Alarm Red Led comes on, S1 S2 doesn't change that.

Thank you for taking the time to help me.

Paul..

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klim8skeptic avatar image klim8skeptic ♦ freko commented ·

The alarm led if for overload/high temp/low voltage.

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wkirby avatar image wkirby ♦♦ freko commented ·

The AC out terminal block is missing and someone has replaced it with a few short wires and a chocolate connector. That is not good. If there are any issues there causing a shirt circuit then that could lead to the overload condition.

This spindly little wires will not help either. They probably offer a decent Voltage drop over themselves which will translate to a low Voltage at the input terminals.

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Murray van Graan avatar image
Murray van Graan answered ·

Hi Freco. The easiest way to trouble shoot would be to get a MK3 usb to VeBus cable, download Veconfig and connect to the unit. The red led might be because of several reasons, even low battery. Have you checked your battery voltage? It could also be that the unit was set up with assistants or as part of a bigger system (parallel or three phase). Once you have the MK3 cable it’s possible to reset it if that is the case.

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freko avatar image freko commented ·

Cheers mate, where will I find an MK3 usb to VeBus cable?

Thanks for your reply,

I have an ethernet cable and analog control unit that came with it, but the Led still comes on and also on the control panel.

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freko avatar image freko commented ·

Hi again, is this the unit you mean, and will it work on my unit.

How does it connect to mine?

Is the price of £60 correct, or do guys on the forum sell second-hand parts?

Cheers.

Paul.

https://www.amazon.co.uk/Victron-Energy-Interface-MK3-USB-VE-Bus/dp/B06Y5WS3VZ

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freko avatar image freko commented ·

One of the reviews does not sound good, it needs drivers and Victron don't supply drivers for the unit.

Amazon review.

Victron - disappointing as always.

13 December 2018 - Published on Amazon.com

Verified Purchase

A $75 dongle that doesn’t work without the drivers, and doesn’t come with the drivers! And their website doesn’t let you download them! True to form for Victron - decent hardware, absolute garbage support, documentation, and everything else.

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waehofman answered ·

@ Freko

there is something you should know. Looking at the dip switches in one of your pictures, I must conclude that the unit is set to use a control panel. DP2 is OFF. For use with the local switch ( ON-OFF-CHARGE ONLY) this DP2 should be set to ON.

(DP1 is not used and can be set to OFF.)

Further to mention: the control panel is a nice thing to have, there is a possibility to reduce the 230 vac input current. a bit more flexibility then DP7, with DP7 the current can only be set to 16 Amps or 6 Amps.

But after all, this information is probably too late for you after 4 year (2019- 2024) but useful for others with the same problem. (according the video: only the red led and no green or yellow led.)

I have the same unit and could reproduce your units behavior.

This unit has a firmware version with ve9bit protocol and VE config together with MK2 will work fine to set your unit to e.g. LIFEPO4 batteries and more off course.

I would say.....phoenix_multi_compact_12__800__35.pdf

good luck


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