I am using GHL Profilux 3.1N. It is being used with temperature probe to control a chiller.

I would like to turn off the chiller at 25.0C and turn on it at 26.0C.

The setting of my Profilux is:

Nominal value: 24.0C
hysteresis: 2.0C
cooling difference: 0.0C

Is the setting correct ?

I found that the chiller was turned on at 25.2C and turned off at 25.0C. It was on and off frequently.
How to solve it ?

Many thanks !