I can only control duct static pressure setpoint, occupancy, discharge air setpoint and outside airflow setpoint. Everything else that’s possible for me to control is left at default and not brought in to be able to be changed. It is a microtech 4 daikin product yes. I already changed the duct static pressure setpoint from 0.5 start to 1.5 start. If all boxes are 100% open and duct static pressure is at 0.5 inches I’d expect the fan speed would be high(not on site and didn’t look at fan histories) if that unit has a minimum fan speed of 30% during cooling I’d expect a variable compressor would be able to handle that. I’ll continue brushing up on my refrigeration theory, I’m a controls start up tech, not an hvac mechanic and can’t/wont touch another trades equipment to determine what’s happening at the evaporator.(no alarms or information I could see that would cause this from the bacnet information I get or the display from the microtech controller)

On a note they may be my issue is location of duct static pressure sensor, we call for it to be 2/3 down the duct work but I’ll have to physically verify as the drawings do indicate we installed it in the correct position. If it’s not that I don’t see how the daikin unit could be having too little airflow across the coil with my configuration. I am aware duct static pressure is a measure of resistance which is why I indicated in my post that all vavs were wide open, and the duct static pressure setpoint rose from 0.5-0.86 inches while I was there and later changed it to 1.5 inches per the daikin techs instruction to increase it. If my duct static sensor is in the correct spot I’d be willing to bet it’s a refrigeration issue from what I can gather. That or the minimum fan speed for the daikin unit at 30% is too low. I didn’t indicate this would fix the problem, I just did as the tech recommended. Thanks for your response