looks like some fault of the database. /usr1/epics/psl/db/acav.db does not contain the correct entry. check rcav.db and copy the record for "C3:PSL-RCAV_TEMPAVG" into acav.db. Then simply change "RCAV" into "ACAV" everywhere for this record. Also change the setpoint for the ACAV in the startup.cmd file to 37.3 and the ACAV-heater value to 4.653. Those are the latest values when both where locked for several hours. Reset the crate again.
Yesterday, I reset the PSL crate behind the SUN computer, but the channel C3:PSL-ACAV_TEMPAVG is stil inactive.