WARNING: I grabbed this out of the manual - use at your own risk!
Try this:
CHA-FEASU
TYPE=D
CM=CLIP
This looks to deactivate CLIP system wide. If that turns out to be a bad thing you should be able to do the same command and say TYPE=A.
It doesn't look like there is any way to disable it on a station by station basis, but AMO SCREN and ZAND are also referenced in the manual when searching for CLIP. This is a Hicom 4000 1.0 manual from 2005, so changes may have occurred.