For those of you who own an Atto 3 and want a detailed manual on the car....like the dealership technicians go by....then go to below weblink and download the zip file...unzip the file and then use the "index.html" file to open the manual....you'll get below menu and then you can view various service manuals. Normally I don't download just any file from the internet but occasionally I do and of course do a virus checks during the process....it came back clean of any viruses. I stumbled across the file/manual when "googling" for such a free download manual. The Diagnostic and Service Manuals are most interesting "with down in the weeds technical data" like what temp your AirCon system should be reaching/blowing, info about HV battery like "cell balance," etc. The manual also show a "bunch" of other stuff like where components are, how to disassemble parts, etc. I've spent less than an hour viewing the manuals...but found some nice-to-know things...like what temp your A/C "should" be blowing if operating properly, HV battery pack cell balance specification, etc. Weblink to manual(s) file download...then let it unzip...then start-up using index.html file. https://workupload.com/file/rJ8HpQFL6MG And below are a few snapshots from the manuals with some comments I've added. Identifies the A/C vent output temperature of a properly performing A/C should be. I would recommend the temperature probe be inserted past the outlet vents...like around the length of your middle finger deep...and doing such in the shade. After the giving the system around 10 minutes to fully cool down with the temp value set to Low/18C and fan speed to 1 (one) check to see what temp you get...it should be in the 5-8C ballpark. HV Battery "Cell" balance. A BYD HV battery pack is a bunch of blade battery cells placed side by side and connected in series to add up the cell voltage. Like in my Atto 3 Extended Range 60.48KWH battery it consists of 126 blade battery cells. The battery pack Battery Management System (BMS) monitors/measures the voltage of each and every one of those 126 individual battery cells. The voltage of all these individual cells must be very close in voltage value otherwise the the cell(s) with he lowest (weakest) voltage values negatively impact the overall capacity/health of the battery pack. The weakest cells become the driving factor in how healthy or unhealthy your battery pack is. If you ever used a OBD2 dongle with the CarScanner OBD app it will show a "cell balance" reading....that is, the voltage "difference" between the cell with the highest voltage and the cell with the lowest voltage. That voltage difference should not exceed 90 millivolts (0.09V) for a healthy battery pack. Well, actually it should be a lot less than 90mv for a "healthy" pack...it's just if it's "greater" than 90mv the Atto 3 Diagnostic Manual recommends several "equalization" charges be accomplished (i.e.., charge from below 10% SOC to 100% SOC) to see if that rebalances the cells...gets the cell balance to 90mv or less....if it don't the manual then recommends battery pack replacement. I've monitored by Atto 3 battery pack for years with a dongle/CarScannerPro...and my pack's cell balance at rest has always be around 6mv when at rest.