Since OMMT2 actuator signs were opposite from the nominal ones (klog30055), I flipped them at COILOUTF gains.
Figure 1 and 2 show the COILOUTF before and after changing the gains, respectively.

Note:

Thanks to the flip of actuator signs, actuator signs become nominal locally.
However, these actuators are used for OMC ASC, which was working well with flipped actuator signs.
So, we need to flip the sign of ASC filters as well for keeping feedback loop stable.