Controller for a chiller and a method for controlling a chiller

A method for controlling a chiller, the method comprising:

• receiving, by a controller, a target value of a control factor of the chiller;
• comparing, by the controller, the received target value with a current value of the control factor of the chiller;
• transmitting, by the controller, a control factor value change command to the chiller if the received target value is not equal to the current value of the control factor of the chiller;
• receiving, by the controller, a changed current value of the control factor from the chiller;
• updating, by the controller, the current value of the control factor on a management screen with the received changed current value of the control factor;
• and
• comparing, by the controller, the received target value with the current value of the control factor again, wherein the controller iteratively performs the transmitting the control factor value change command, the receiving the changed current value of the control factor, the updating the current value of the control factor on the management screen, and the comparing the received target value with the current value of the control factor again until the received target value becomes equal to the current value of the control factor of the chiller, if the received target value is not equal to the current value of the control factor of the chiller as a result of the comparing, by the controller, the received target value with the current value of the control factor of the chiller again.