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jgyates / genmon

Generac (and other models) Generator Monitoring using a Raspberry Pi and WiFi
GNU General Public License v2.0
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48KW Liquid cooled Battery fault code : 2760 #1017

Closed Mehrdadg closed 9 months ago

Mehrdadg commented 9 months ago

Hi all not sure if this is the right place for my post so I apologize in advance if I am posting something that should not belong here:(

I have 48KW liquid cooled generac generator and recently a new battery was installed by my local authorized service provider.

Since then, I have been getting Battery fault code of 2760 which the only way to reset it is to power cycle the ECU. Again, this was coincident with battery replacement. I even changed to another battery thinking there was a faulty battery and still got the code so I know its not the battery.

Now sure what is going on but my suspicion is that either the ECU or the battery charger is now faulty.

Also I know the generator is constantly charging the battery and the terminal voltage during charging is ~14.2-14.3V and the ambient temperature I am dealing with is ~40-50F. Thanks to genmon SW, I now have all the visibility to all these:)

Question: is the batter charger part of the Evolution ECU or a separate unit?

Also if I get a new ECU, is this something I can program and active myself or do I need have an authorized person to do this?

Finally, does anyone know what is the normal DC current on the + terminal of the 12V battery when in standby mode?

Any help is greatly appreciated

jgyates commented 9 months ago

I believe the battery charger is a separate unit from the controller on the Evo but not on the nexus. I am not a generac service expert so others can correct me if I am mistaken.

If you replace the controller you don't need to activate the replacement unit as the serial number is not present in replacement units. Regarding replacing it yourself I will let others weigh in on that as I have not done that myself. I do know that you have to set the fuel type, voltage and parameter code but other than that I don't know what else is involved. It is probably covered in the Evo Liquid Cooled maintenance manual.

jgyates commented 9 months ago

Also, you can read some info in the code comments in this link related to the battery charger behavior: https://github.com/jgyates/genmon/blob/19c11fec604ff3183175ce4115a13840cf08a7db/genmonlib/generac_evolution.py#L4258

I am going to close this thread but feel free to post any follow up to this thread.