My Orbit Irrigation System Timer Has Power But Is Not Communicating With the Sprinkler System

Timer Power Supply

• All electronic sprinkler timers use AC power. This requires the use of a small transformer that converts the 110-volt electricity in your home to the 12 volts that most timers use. If you do not have a transformer, chances are the power is too much for your timer to handle and it may have a blown fuse. Replace the fuse located inside the timer box.

Sprinkler Wiring

• Sprinklers use a special type of wiring that is double wrapped to keep it waterproof. This wiring setup usually comes in bundles of seven or 13 wires, enough for a six- or 12-zone system. The white wire is the negative, or ground. Each colored wire represents a single sprinkler zone.

Connection Points

• All sprinkler wires end up being connected to solenoids on the top of sprinkler valves. The wiring for solenoids must be kept completely waterproof. Even a single drop of water on the line can short out the solenoid, or the sprinkler timer. Always place sprinkler wire connection points into grease caps, which seal out all water.