This is one of the most common reticulation issues especially in suburbs like Butler, Carramar, Banksia Grove and Clarkson where these controllers were installed as part of the landscaping package.
The first thing you should know is that there is no fuse! And the little battery symbol with a line thru it doesn’t mean there is a problem with the battery. There is no battery.
The message means one of two things:
a) There is a fault with a solenoid
b) The controller is faulty.
We can run some tests to prove which one it is, but don’t waste your time looking for a fuse or a battery!
As a general guide if the display is flickering and intermittent the box itself will be dead, but if everything looks good then it may well be the solenoid coil.