AHU Faults

[spatz]

I'm having a problem on an AHU that will not hit btemperature the actuators to htg coil are fully open and hot water is passing through but i am not getting my set point met by 8 degrees C, can anyone give me some advice please

 

[snowhead]

More info needed.

Is it Full fresh air, fresh air+recirc or recirc only?

Are the filters clean?

Is the coil clean?

Is there a difference in flow and return temps on the pipes?

Has it ever worked correctly?

Has it ever worked correctly given the current outside temps?

Has anything changed in the area it supplies since it last worked correctly?

Is the boiler flow temp at it's setpoint?

Is it a dedicated boiler to that unit?

 

[Rockstar94]

Hi mate
I have alot of this day to day, what's your flow and return on Hester battery? What's the off air temp? Finally have you checked the actual off air temp with a meter?