Wire multiple valves to one zone in serial or parallel

I ask because I had 2 valves wired, plus the main valve plus I put on water hammer. It got to the overloaded zone and shut down. Now all of the zones associated with that common wire (6 of the 16) are giving a ‘fault - open line’ reading while the others are fine. Trying to tap down what the issue is… controller? Solenoids blew? Common wire fried?