Question
could u explain how it works, from mains stop cock in garden. Pump is 230v only comes on via a switch next to fused spur connecting smartzone tm ez. Turn switch on power goes to a huge green tank three core only two connections? Live comes back out and powers up pump.  q: what is the huge green tank and connections? Q:if control panel is not working but transformer ok can i bridge which connections to see if water comes out of surface pipe (sprinklers) q: how can i turn on sprinklers with out useing controller. Do u know how i can get a manual for smart zone tm ez. This system has a rain switch connected.

Answer
Hi Ray

Here you can find the manual: https://www.sprinklersupplies4less.com/images/upload/file/Nelson8501Instructions.pdf

As you described it looks like: You have a system with a pressure tank and a pressure SW the power from the controller goes to an pump star relay and the pressure SW close to the pump will start and stop the pump.  When a valve is open the pressure drops bellow the pre set value for low and start the pump, when the valve is closed the pressure raises above the pre set value for high  and stops the pump.

If you manually open any valve this zone will start watering until you close it manually on this way you can watering without using the controller. If you wants to watering automatically you have to use the controller. You can start the pump manually but it will stop at the pre set value for high pressure because there is not any open valve.

Regards
Guillermo