I'm turning on my BMS for the first time and one getting Error 15. It says contact support but support says ask here, idk? Has anyone ran into this? I can't access it through WiFi and do a reset because it won't engage my contactor. Any help would be greatly appreciated. Thanks!
Q series BMS Error 15
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Rick OGM Support Staff
An error 15 is caused when
1) a cell tap wire is disconnected while still connected to the BMS and it created a voltage imbalance, burning out the highly sensitive ADC circuitry.
2) You connect up your cell tap wires while the green terminal block is connected to the BMS and before doing a voltage test.
3) You have inadvertantly cross wired your cell tap wires and created are large voltage differential between cells
First, remove the green terminal block and measure each cell voltage back to ground. It should increase by about 3.3v per cell, so 1- to 1+ = 3.3v 1- to 2+ = 6.6 1- to 3+ 9.9, etc,. The manual will be helpful too.
If you find a wiring issue, correct it and try again. If you still get the error, you may have fatally damaged your BMS.
The original Q series has been superceded by the 2Q so it will need to go back to REC head office for repair/return. You can contact Maja at maja@rec-bms.com for help.
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@Rick Thanks! I fear it's a 1. but due to a different operator error. I wish the Q's were still available and I'd purchase a back up due to being off grid. I've been trying to compare to the 2Q to see how difficult it would be to make them interchangeable. What do you think? Thanks again!
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Rick OGM Support Staff
Hey Tony, the big change is that the 2Q uses better connectors, has more memory, a real-time clock and has a built in precharge circuit. It also requires the Wi-fi as the standard interface
If you would like to upgrade to the 2Q contact us at support@ogm-energy.com and we will see what we can do to help :)
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I think I need some help with my charge settings. I have one cell pack thats going over voltage cell/s is above the maximum set threshold and the BMS keeps kicking on and off, and a cell voltage differ more than set value. I have LF280K V3 280 Ah 3.2V Lifepo4 grade A Prismatic cells, 2P 16S. here are my current settings:
Balancing END Voltage [V]: 3.55Balancing START voltage [V]: 3.4Maximum allowed cell voltage difference. [V]: 0.25END of Charging [V]: 3.55END of charging voltage hysteresis per cell [V]: 0.25Max allowed cell voltage [V]: 3.75Max allowed cell voltage hysteresis [V]: 0.2Min allowed cell voltage [V]: 2.7Min allowed cell voltage hysteresis [V]: 0.1Min Vcell discharge [V]: 2.95Charge float voltage coefficient [0 - 1]: 0.8Current settings
ShuntCurrent sensor coefficient 0.019531Current sensor offset [A]: 0Max charging current per inverter device [A]: 180Max discharging current per inverter device [A]: 180Max system charge current [A]: 1000Max system discharge current [A]: 1000Charging coefficient [C rating]: 0.5Discharging coefficient [C rating]: 1.5Temperature settings
UnitsMinimum allowed temperature for charging [℃]: 0Maximum allowed cells temperature [℃]: 60Max allowed BMS temperature [℃]: 55Max allowed BMS temperature hysteresis [℃] 5System settings
Operational capacity [Ah]: 560Battery cycles 3Number of inverter devices 1Thanks!!Chemistry:
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Rick OGM Support Staff
Your battery parameters all look good. It sounds like it may be a cell imbalance issue.
Did you static balance your pack before you built your pack?
Do you have a "Smart" charging system using CVCC or DVCC control, where the BMS is allowed to taper back the chargers output to avoid an overvoltage condition?
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I did not static balance. Thats actually the first time I've heard of it.
I have a Color Control GX with the DVCC settings turned on if that answers that question. And, I thought it was set up to do that.
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Rick OGM Support Staff
Thats likely your issue. The BMS can bring a slightly imbalanced pack back into balance but for a badly out balance system the best solution is a good static balance but if that is impractical now you may want to manually bleed off the high cells using a load resistor, or even an old style incandescent light bulb.
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Right now they all look really good. The sun is down so they're not charging, and my low pack from earlier is now my highest. Right now 3.33 highest/3.31 lowest.
I just got it all going over the weekend and today is the closest it's got to full charge. This my be a dumb question but could it be because it's brand new and just hasn't balanced it's self out? Thanks for your help! Tomorrow is a full day of sun and I'll be here to monitor it closley. If I run into any issues I'll see about doing a bottom balance with a bulb. Thanks again
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Great news. I think. So when I was initially starting everything up and updating firmware on everything my BMS was on my device list. Something rebooted/updated and it wasn't on the list but still looked like it was working. Not knowing what it would like if it were, I assumed, we know what that means. For some reason I got up this morning and decided to update my BMS firmware a second time, I had to do that to all of my Victron components, after the reboot it appeared on my device list. All should be good until I have another issue! Thanks again!! You always respond so fast! I have another place that support commonly takes 7 days to respond. Thanks Rick, you're the GOAT
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Rick OGM Support Staff
Good news! This may help to explain why the BMS was not pulling back the charger output on your Victron and keeping it from tripping.
Thanks for the update
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