Persistent Issue with Quattro Inverter not switching on

[jvdspoel (Johan van der Spoel)]

I am still experiencing the same persistent problem with my Quattro inverter: whenever I switch it off or perform a remote configuration change, the inverter only comes back on if I remove the VE-Bus cable.

I am unsure if this is an isolated issue, but I have encountered it at a customer site as well. Notably, the issue was present with firmware version 362 and on the old interface before, and after further investigation, I have confirmed that it persists even with the latest Beta firmware.

This is proving to be a significant challenge for me. Have you come across this issue before, or do you have any ideas on how I might resolve it? Any guidance or suggestions would be greatly appreciated.

Thank you very much for your assistance

[nickdb (Nick)]

Is this GX powered by AC or DC?

Have you read this topic?

Multiplus-II inverter not switching On with VE.Bus cable to Cerbo GX Connected

@selwyn There is an old workaround if it persists. Q20.

[jvdspoel (Johan van der Spoel)]

No but have now, I don’t think that is the solution, this started happening when I upgraded my Quattro 48/10000 to a Quattro 48/15000 - I am running from a single power source Freedom Won 60/40. I have industrial shielde cables.
Could it be that perhaps I have a faulty control board in the inverter, I have tried a different Cerbo as well?

[jvdspoel (Johan van der Spoel)]

I still have not got a answer with regard to my inverter not switching on after a change with VEConfig - this is a problem and I need some assistance plz

[guystewart (Guy Stewart (Victron Community Manager))]

Hi,
It sounds like you didn’t try yet?

Please try the PIN7 workaround and then report back.

[dognose]

@jvdspoel

The inverter will only switch on once i disconnect the VEBUS cable.

This is a known behaviour and mentioned in the docus. When you run a gx powered from ACOUT of the inverters, you have a chicken-egg-deadlock of both devices.

See:

20.2.20. Q20: Issues with Multi not starting when Cerbo GX is connected / Caution when
powering the Cerbo GX from the AC-out terminal of a VE.Bus Inverter, Multi or Quattro

Ensure that both the GX device and the MultiPlus are running the latest firmware.

If the GX device is powered via an AC adaptor connected to the AC-out of a VE.Bus Inverter, Multi or Quattro, a deadlock can
occur after the VE.Bus device is powered down, for example, during a black start or fault. In this state, the VE.Bus product will not
start until the GX device is powered, but the GX device cannot start without power either.

How to resolve the deadlock

• Unplug the VE.Bus cable from the GX device briefly. The VE.Bus device will immediately begin to boot.

How to avoid the deadlock
There are two options:

• Power the GX device directly from the battery
• Remove pin 7 in the VE.Bus cable connected to the GX device. Removing pin 7 allows the VE.Bus device to start
  independently of the GX device.

The fastest and easiest way to remove this pin is with a very thin flat head screwdriver. This can be inserted into the pin grove,
and then used to leverage out the gold contact plate. Be aware that this small highly conductive plate will fall out, so this should
not be done over the open unit.

[chrigu]

Isnt the VE.Bus BMS Mains detector doing the same thing, disconnecting Pin7 through a Relay when Mains is available? Or does it disconnect Pin6?

3. Installation

[jvdspoel (Johan van der Spoel)]

My Quattro is a 15KV. The cerbo is connected to my Lynx distrubutor.

.

I got the following devices installed. Latest firmware installed on all devices. Previuously Quattro 10KVA - no issues.
I will Reset the inverter using Ve Quick Flash -personally I dont think cutting any cables is going to solve the issue. I use most of the programable Relays to control various stages fo SOC levels to turn off Non essentials when Eskom is not available. I am testing various options that i would like to present to customers as optinal extras. I have started looking at Node Red but being at my age it is not going to be a fast process.

[chrigu]

Apart from it being shipped with the VE.Bus BMS, the VE.Bus BMS Mains Detector is a separate device. Its just a small PCB with two 230VAC inputs that each activate a relay inside, to disconnect Pin 6 or 7.

If it disconnects Pin 7 then im sure you could use it in your situation as well, regardless of you not using a VE.Bus BMS

[jvdspoel (Johan van der Spoel)]

I have now used VE.Bus Quick configure and reset the inverter. I have loaded setting without any assistants, I have changed the VE-Bus Cable with a new cable. Still the same issue. There can be probably 2 Issues - we have a faulty VE-BUS on the inverter - or something on the Cerbo though I think that is slim. I don’t like the idea to cut cables and remove pin 7. All my sites work fine when I do remote config’s and would prever that mine work as well.

[jvdspoel (Johan van der Spoel)]

I use a CAN Bus for my BMS

[chrigu]

Yes i know, but like i said, it works independent of the BMS

Just grab a spare RJ45 cable, remove pin 7 on one side and then we all know if that solves it or not. Does not need to be permanent, just as a test

[jvdspoel (Johan van der Spoel)]

I will make up cable tomorrow and test

[jvdspoel (Johan van der Spoel)]

Morning - I have made the Cable up with PIN 7 Cut. It seems that the inverter is now starting after a remote configuration. Does this mean that as a default that we should be using a cable with pin 7 disconnected?

[dognose]

No, that is only required, when your gx is powered from the acout of the inverters.

• Gx doesn’t boot without power
• inverters don’t boot with that pin beeing pulled down by the gx.

Preferable solution would be to run the gx from dc directly, so it can startup without the inverters beeing online. Then, the inverters will start, as soon as the gx is ready / starting.