ImoLaza has a resettable fuse, which means it won't get burned by an electrical circuit failure, like a short. Instead, the indicator would go out and the controller won't work. Once you reboot it, the controller comes back again.
I have extensive experience in diagnosing electrical circuit failure, and I think a shortage in your system causes the device to lose power frequently, which could be the valve or wires. If you get a multimeter, check the volts between the com and zone wires