I've ran the air conditioner many, many times on just the inverter without any issues--in fact I've run BOTH air conditioners in my 315RLTS without any issues off just the inverter. Suddenly (on the previous trip while stopped at a rest area) I noticed the Victron will not start either air conditioner.
Extensively troubleshot today trying to isolate the problem. Both air conditioners have EasyStarts installed. I looked at the bedroom (13.5K unit) a/c's EasyStart and trouble lights D22 and D23 were lit after the failed starting attempt. According to MicroAir's Advanced Troubleshooting info, that means there was a Short Cycle Timer (3-minute restart violation) or a Power Interruption.
I reset the EasyStart on the bedroom a/c and went through the re-learn process. No help. Same problem.
I then set the jumper in the Easy Start to defeat it (bypass the microprocessor control) and got the same result--a/c will not start on the inverter.
Watching the BMV-712 very closely there's a slight voltage drop when the compressor attempts to start, so it is trying to start but the Easy Start aborts due to what it sees as a "Power Interruption".
Both air conditioners start and run perfectly on shore power.
The microwave runs fine on just the inverter (pulling >1500W). In fact I ran the microwave and both air conditioner fans on high all at the same time, pulling >2700W out of the batteries through the inverter. No issues.
I removed the MPPT Solar Charger from the circuit and disconnected the Renogy DC-DC Charger from the inverter. (Very unlikely they'd be causing an issue but isolated them as a variable.)
Only items left that could be the single cause of the problem are AMSolar's Smart Phase Selector (SPS), the inverter, and the Battle Born Batteries.
I bypassed the SPS so the output of the inverter went straight into the trailer's Power Distribution Center (lower, or black, wire of the two 50A legs). The air conditioner still refused to work. It's not the SPS.
Checked and double-checked the inverter's configuration. I removed all the extra assistants (DVCC and ESS). I made sure the VE.bus was reset after the changes. I tried turning on the UPS function and turning it off. No matter what settings I tried in the inverter the a/c still refused to engage the compressor.
Finally, I ran the air conditioner on shore power (so the compressor was running) and then shut off shore power. In the past the a/c kept running on the inverter without a hint of an issue. Today the compressor immediately quit when shore power was lost (but the fan kept running).
At this point the only thing I can think of is my battery use is so out-of-the-norm that even though the Battle Borns are supposed to self-balance they currently are not balanced. When the compressor calls for the large start up surge (even the relatively mild settings of the Easy Start) the BMS is temporarily shutting down power for a split second. I'm guessing this is also true when switching from shore power to inverter power with a large load.
What I'm going to do is (almost) deplete the batteries and then recharge off of shore power back to 100%, allowing for a full absorption and then float mode without any interruption or secondary power input.
If anyone has any other ideas...please...fire away.
Extensively troubleshot today trying to isolate the problem. Both air conditioners have EasyStarts installed. I looked at the bedroom (13.5K unit) a/c's EasyStart and trouble lights D22 and D23 were lit after the failed starting attempt. According to MicroAir's Advanced Troubleshooting info, that means there was a Short Cycle Timer (3-minute restart violation) or a Power Interruption.
I reset the EasyStart on the bedroom a/c and went through the re-learn process. No help. Same problem.
I then set the jumper in the Easy Start to defeat it (bypass the microprocessor control) and got the same result--a/c will not start on the inverter.
Watching the BMV-712 very closely there's a slight voltage drop when the compressor attempts to start, so it is trying to start but the Easy Start aborts due to what it sees as a "Power Interruption".
Both air conditioners start and run perfectly on shore power.
The microwave runs fine on just the inverter (pulling >1500W). In fact I ran the microwave and both air conditioner fans on high all at the same time, pulling >2700W out of the batteries through the inverter. No issues.
I removed the MPPT Solar Charger from the circuit and disconnected the Renogy DC-DC Charger from the inverter. (Very unlikely they'd be causing an issue but isolated them as a variable.)
Only items left that could be the single cause of the problem are AMSolar's Smart Phase Selector (SPS), the inverter, and the Battle Born Batteries.
I bypassed the SPS so the output of the inverter went straight into the trailer's Power Distribution Center (lower, or black, wire of the two 50A legs). The air conditioner still refused to work. It's not the SPS.
Checked and double-checked the inverter's configuration. I removed all the extra assistants (DVCC and ESS). I made sure the VE.bus was reset after the changes. I tried turning on the UPS function and turning it off. No matter what settings I tried in the inverter the a/c still refused to engage the compressor.
Finally, I ran the air conditioner on shore power (so the compressor was running) and then shut off shore power. In the past the a/c kept running on the inverter without a hint of an issue. Today the compressor immediately quit when shore power was lost (but the fan kept running).
At this point the only thing I can think of is my battery use is so out-of-the-norm that even though the Battle Borns are supposed to self-balance they currently are not balanced. When the compressor calls for the large start up surge (even the relatively mild settings of the Easy Start) the BMS is temporarily shutting down power for a split second. I'm guessing this is also true when switching from shore power to inverter power with a large load.
What I'm going to do is (almost) deplete the batteries and then recharge off of shore power back to 100%, allowing for a full absorption and then float mode without any interruption or secondary power input.
If anyone has any other ideas...please...fire away.
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