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Hello, can you get me the full model number of the voyager unit.
However the problem is most likely related to the static pressure sensor that controls the VFD unit...in the heat of the day more of the variable air volume boxes or zone dampers will be wide open, and the static pressure in the supply air duct will drop...that will normally cause the VFD to go to full speed.. full speed amperage draw may be exceeding the motor over load ratings.
Send me a picture of the VFD with the door open so I can see all of the components.
We can go from there
Hello again, we are not the Trane tech support site (which is world class by the way). We are several thousand techs in a wide range of disciplines, and doctors, attorneys, etc... I have considerable experience with Trane, but only the Trane factory tech service will be prepared to handle this issue for you.
Thanks for trying Just Answer.