esmail-kassir Posted September 8 Share Posted September 8 (edited) "Hello, I have a Triple A inverter (Voltronic axpert VM 3) and felicity 200 48 and I’m getting the 'BP' error at different times. Sometimes it happens once a day, sometimes once a month. Sometimes, the alarm beeps, the error code appears, and then it beeps again, the code disappears, and the screen goes back to normal. Other times, I wake up to find the inverter completely turned off. Two weeks ago, I woke up and everything was working fine, but I noticed the battery voltage was around 24V, even though my battery setup is 48V. The system was functioning normally and the loads were running, but the inverter wasn’t charging the battery. I updated the firmware to 60.76, and the problem disappeared. This morning, I woke up and found it turned off again." I turned it on , everything is normal except having wrong time in the logs on the mobile application anyone has an idea why it turns off ? Edited September 8 by esmail-kassir Quote Link to comment Share on other sites More sharing options...
TaliaB Posted September 8 Share Posted September 8 bP" is the "Battery not Present" error. BMS would have disconnected the battery due to too high or too low battery voltage. Coulomb 1 Quote Link to comment Share on other sites More sharing options...
esmail-kassir Posted September 8 Author Share Posted September 8 2 hours ago, TaliaB said: bP" is the "Battery not Present" error. BMS would have disconnected the battery due to too high or too low battery voltage. Theoretically you are 100 % correct but I tend to believe this is firmware bug , as it coexists with other strange behavior. Also the battery screen doesn’t show any warning icons or messages . And it happens out the peak usage hours ( actually it didn’t happen during any moment where the load ir temperature where high) Quote Link to comment Share on other sites More sharing options...
Coulomb Posted September 9 Share Posted September 9 22 hours ago, esmail-kassir said: Two weeks ago, I woke up and everything was working fine, but I noticed the battery voltage was around 24V, even though my battery setup is 48V. The system was functioning normally and the loads were running, but the inverter wasn’t charging the battery. The VM series saves a little money by having one firmware for both 24 V and 48 V models. It decides which hardware it is running by reading the voltage on a pin at power-up. The result is stored in RAM; I think it's static RAM but it might be dynamic. In either case, a glitch in the power supply could cause the RAM contents to change, making it think that it's running on the wrong hardware. This can be very bad; I would always restart immediately if that happens. Though possibly the problem could happen due to a comms error that happened to fluke a good CRC. The display remembers what the nominal voltage of the system is from the results of the last QPIRI command. That's far less dangerous. You could find out if it's the display or the inverter itself by unplugging and re-plugging the RJ-45 cable from the removable display (not so easy if you happen to have a model with the round/colour display). Warning: this will effectively switch off the main switch, which will drop the loads. Reconnect the display before the inverter completely shuts down; it should not shut down if you have a charging source (AC-in or PV). A few screws should make this RJ-45 cable accessible. If it's the removable display firmware, then updating that may fix the problem. Quote Link to comment Share on other sites More sharing options...
esmail-kassir Posted September 9 Author Share Posted September 9 1 hour ago, Coulomb said: The VM series saves a little money by having one firmware for both 24 V and 48 V models. It decides which hardware it is running by reading the voltage on a pin at power-up. The result is stored in RAM; I think it's static RAM but it might be dynamic. In either case, a glitch in the power supply could cause the RAM contents to change, making it think that it's running on the wrong hardware. This can be very bad; I would always restart immediately if that happens. Though possibly the problem could happen due to a comms error that happened to fluke a good CRC. The display remembers what the nominal voltage of the system is from the results of the last QPIRI command. That's far less dangerous. You could find out if it's the display or the inverter itself by unplugging and re-plugging the RJ-45 cable from the removable display (not so easy if you happen to have a model with the round/colour display). Warning: this will effectively switch off the main switch, which will drop the loads. Reconnect the display before the inverter completely shuts down; it should not shut down if you have a charging source (AC-in or PV). A few screws should make this RJ-45 cable accessible. If it's the removable display firmware, then updating that may fix the problem. The 24 issue occurred once and never happened again but I still have the sudden shutdown issue and or BP Fault only when PV availability Quote Link to comment Share on other sites More sharing options...
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