Call for no heat in the lobby, on arrival temperatures were set to 80 reading 65, went onto the roof and checked operation and system was starting up and fired up, let system run for a 1hr and checked temperatures in multiple locations in the lobby and was reading 70 and matched the the thermostat readings, checked 1 of the hallway units that is Heat strips only, it is a 6.8 kw it is energizing and doing everything that it can. This location needs 2 techs each time.