So...
If the parking sign lists three time ranges, one plain, one in parenthesis and one in red, it means you can only park during those times.
...but if it lists only one time range in black, and states a maximum duration, the meaning of "time range in black" magically changes from "you may only park here during these hours on ordinary weekdays" to "you can park any time you want, but during these hours, you can only park for 3 hours"?
That's not logically consistent at all!