What does brine control mean in practice?
Includes observing the level before and after the cycle, aspirating the solution and re-pouring the measured water.
When does it matter?
Salt present in the tank does not prove that the head has taken the regenerant through a tight pipe and a clogged injector.
Which solutions are related to it?
The manual cycle is started, marks the levels, checks the vacuum and removes the bridge, sediment or leak.