Danfoss ECL Comfort 310 Installation Manual page 162

Installation Guide ECL Comfort 310, application A376
How to react on alarms?
An alarm indicates that the system is not operating satisfactorily.
Please contact your installer.
What does P and PI control mean?
P control: Proportional control.
By using a P control, the controller will change the flow
temperature proportional to the difference between a desired
and an actual temperature, e.g. a room temperature.
A P control will always have an offset which not will disappear
over time.
PI control: Proportional and Integrating control.
A PI control does the same as a P control, but the offset will
disappear over time.
A long 'Tn' will give a slow but stable control, and a short 'Tn' will
result in a fast control but with a higher risk of unstability.
Danfoss District Energy
162 DEN-SMT/DK VI.GU.B1.02