cory cantrell avatar image

Lynx Distributor Red LED - But Fuse Not Blown.


Hoping I can get some help here, I am installing 2 new Multiplus-II in parallel system and all seems to be working well except i get all LED lights as red on the lynx distributor when I have AC power on and the inverters are charging. I have tested all the new fuses just via continuity test and the batteries are getting charged.

The even stranger thing is this: When I put the 120x2 3000 12v 50a Multiplus in standalone operation, they light will be green, then turn red after a period of time, then green again, but as soon as I put them in parallel and they are both charging the batteries from AC power, the led's on the lynx distributor stay red.... I have the battery protect connected to one slot on the lynx, 2 inverters (multiplus-II) each in its own slot, and the final slot is taken up by my BIM to chassis battery/alternator. The batteries are connected to the Lynx shunt via the end posts (where most people would connect the lynx power in). All the components have shutoff switches in between them.

Any help in understanding the Red LED's when under load would be greatly appreciated. As soon as I turn off the load the led's go off, and only the one green in the center of the distributor is lit. The lynx shunt stays green in any scenario.

Update - Even in standalone when the lynx distributor is under load the lights turn red. I have taken everything back apart and verified every connection but no matter what, under load, I get red lights on the lynx distributor. @Guy Stewart (Victron Community Manager) - Either load from chargers or load from the coach, ie when I turn on a microwave and a heater, it happens every time. I have ordered another lynx distributor to see if maybe it is a hardware board fault? I can't think of anything else it would be... Thanks for any advice in advance.

I have raised this with my retailer (CR for multiplus, and another company for the lynx) and they stated they would open a ticket with Victron, but have heard anything. I think this is an odd one, but maybe Victron staff have ran across this before?

Multiplus-IIlynx shunt
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I just also realized it does the same thing under load. If I run a Load the lights immediately come on and a humming and vibrating sound appears in the battery area where the lynx is.

Hi @cory cantrell

how do you power the lynx 5v line? I'd look there first. is it an isolated source? might be a ground loop issue?

cory cantrell avatar image cory cantrell Daniël Boekel (Victron Energy Staff) ♦♦ ·

I use an RJ11 from the lynx shunt to the lynx distributor. I have tested this thing to death and just can’t figure out why they turn red, I have replaced all cables, replaced the lynx distributor. I don’t see a ground loop but honestly don’t know how to test for one... Any ideas/thoughts? Odd to me it only happens on heavy loads.

I have a Lynx distributor. I feed it with 5V with the RJ connector. Until now the LEDs worked correctly (green). Now I have an error and I have not changed anything, the fuses are good but they have lit red. I have done all kinds of tests, I have disconnected all the systems, but I cannot find where the problem is. I have replaced the 24v battery with a 12v one to test and it works, the led lights up green. But when I install the 24V battery all the LEDs light up red. Any suggestion? Can I update firmware at the dealer? Thanks

extensive information. I have updated the firmware of the Cerbo and now the led lights orange. any ideas? Cheers

6 Answers
tozz avatar image
tozz answered ·

It's hard to give any ideas without additional information, only thing that pops up in my head is that perhaps positive and negative are reversed?

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Thanks for the reply, I have 100% verified the cabling and have taken it apart 2 times completely and even ran new cables from the inverter to the lynx distributor (configured both as standalone and tested one at a time on the new cables) the same thing happens at at high load. I replaced the lynx distributor and the same thing happens.

today I plan to remove the equipment ground lug and test (Maybe a ground loop or alternate path for negative is being used?)

I am really running out of ideas as this is a weird one. Today I plan to put a clamp meter on the equipment ground under load and see if that is the path being used for return.

I am very sure I don’t have + and - reversed though.

jedm avatar image
jedm answered ·

I am having the exact same situation. I have run things off the AC, but today when I turned on the toaster oven, lights on the Lynx shunt went red. When the toaster oven is not heating (but is still plugged in) the lights go out and the center one returns to green. The weird thing is, the lights on the Lynx shunt are sometimes just one goes red, others times two will go red (plus the center light).

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gsymes avatar image
gsymes answered ·

I too am having a similar issue. Lynx distributor being use with Lynx shunt. All fuse lights red, but fuses all ok. Green power light isnt on. If I unplug and replug the RJ11 cable then the green power light comes on, all fuse LEDs go green, then back to red again.

Very strange, let me know if anyone finds any reason for this.


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Tsama Parsons-Pineda avatar image
Tsama Parsons-Pineda answered ·

We are having the same issue. Under a larger load of 20 A, 240 V inverter output the error occurs on several different fuses sporadically and intermittently. It seems that the sensitivity of the detection is set too high. Could this be fixed in software and pushed out via the next firmware update?

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boulderdave avatar image
boulderdave answered ·

I have the exact issue. 24v system with 3 Quattros. When the Quattros are under heavy load - the fuse lights go red. It goes back to normal when the kid is reduced.

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dennisawd avatar image
dennisawd answered ·

Hi. According to victron the lynx distributor have a fuse sense and with a voltage difference of 0,5 volt above the fuse the LED will turn red. It might be something with the resistance in the fuse to do. Is the fuse a 12v or 24v fuse?

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