Reason:

(1) Input signal is received from the controller (K2) before the start of excitation.

(2) An input signal is received from an external device before the start of excitation.

Solution:

(1) Check whether the start of excitation of the controller (K2) is not pressed before the start of excitation.

(2) Check whether an input signal is input from an external device before start of excitation.
Click here for details. OSC.0 causes and methods of investigation