Rain Bird ESP-LX Modular Raster Test Shows Open Circuits on MV, Valves 2 & 4

2007 Rain Bird ESP-LX Modular waters intermittently (only 3 zones). Raster test shows open circuit on Master Valve, Valve 2, and Valve 4. Installer didn't label valve chart.

Open Circuit Meaning

No current flow between controller and valve. Causes:

1. Bad solenoid: Test with multimeter (disconnect from controller). 20-60 Ohms = good. >60 or <20 = replace.
2. Cut wire: Check for recent digging along wire path.

Locating Unmarked Valves

• Wire tracker (Armada 700 ~$1000) — professional tool
• Hire irrigation company (recommended)
• Master valve typically near pump discharge line
• If no master valve exists, MV open circuit is normal on raster test

Note

RASTER = Rapid Station Test Routine. Test each zone individually after fixing wiring to confirm operation.