PhotonsAreNeat
New Member
When a lifepower4 battery drains to the point that the BMS goes off, what is the proper wakeup procedure? The manual doesn't say.
This rack has 3 batteries, top battery is the one connected to the inverter's comms. When the batteries die, the top one is typically the one that seems to shut off completely.
What has worked before is to start charging the rack with the chargeverter, and typically the red alarm light will come on steady on its own. Then I hold the reset button, all lights will cycle, then the battery will rejoin the bus and start charging.
However, this didn't work last time. The lights would cycle, you'd hear a static noise from the battery, then it would alarm again. I'm assuming it's trying to rejoin the bus, but since the bus is being charged there's too much current and it drops off again. Seems to make sense. In this case, I shut off the charger, then reset again, it rejoined, then started the charger again.
However (again) this procedure above did not work today. Even with the charger off, and the other batteries did pick up a little bit of charge, this top battery would not rejoin the bus. It just lit the alarm light steady every time the BMS was reset. This time, the breaker for the battery had to be cycled, then the BMS reset again. That worked, and the charger was started up.
Anyways... Is there not an actual wakeup procedure that is proper? I'm making guesses here on what will work.
This rack has 3 batteries, top battery is the one connected to the inverter's comms. When the batteries die, the top one is typically the one that seems to shut off completely.
What has worked before is to start charging the rack with the chargeverter, and typically the red alarm light will come on steady on its own. Then I hold the reset button, all lights will cycle, then the battery will rejoin the bus and start charging.
However, this didn't work last time. The lights would cycle, you'd hear a static noise from the battery, then it would alarm again. I'm assuming it's trying to rejoin the bus, but since the bus is being charged there's too much current and it drops off again. Seems to make sense. In this case, I shut off the charger, then reset again, it rejoined, then started the charger again.
However (again) this procedure above did not work today. Even with the charger off, and the other batteries did pick up a little bit of charge, this top battery would not rejoin the bus. It just lit the alarm light steady every time the BMS was reset. This time, the breaker for the battery had to be cycled, then the BMS reset again. That worked, and the charger was started up.
Anyways... Is there not an actual wakeup procedure that is proper? I'm making guesses here on what will work.