Tech arrived on site and was met by the Senior Director for multiple nursing home locations Curtis Vickers. He reported that we installed return duct modification and a 7.5 ton split system (manufactured in 2021) and reports it has had several issues ever since. He first mentioned drain backed up one week after install and no heat calls the following winter. Also, Symbio main control board has been replaced by either Jackson and Sons or Carolina Comfort. Tech has documented that Michael diagnosed failed Symbio board. Carolina Comfort has recently been out and diagnosed shorted compressor. They also left copy of documentation indicating that duct system is providing inadequate airflow for 7.5 ton system. Curtis Vickers expressed concern and frustration that failed compressor could be due to low airflow. Mr Vickers says that Carolina Comfort reported blower moving only 2400 CFM of 3000 required CFM for 7.5 ton system. They say that the six inch branch ducts going to 4*10” ceiling regis