For some time I ran the AC at 23C and 24C and the first set of plots shows this weeks and last week's PSL table temperatures.

The PSL crew has been leaving the AC breakers on, when going back to Commissioning mode, and we did today, and the AC remained on.  I checked the controller, and all was as it should be, so I turned th AC breakers off, and the PSL temperature returned to normal.  Second pot shows this change, made at the blue line.