Toro Greenkeeper 212 Water Drop Symbol: Rain Sensor or Controller Fault

Toro Greenkeeper 212 shows water drop with slash (rain sensor active) and won't run. Two likely causes.

1. Rain Sensor Active/Wired Wrong

• Check sensor: dry? Clean? Wired to SEN terminals?
• Jumper SEN terminals at controller → if runs, sensor/wiring issue.

2. Controller Output Failed

• Test: run station 1 manually, measure 24VAC at terminal 1 vs C.
• No voltage → controller dead. Replace.
• Voltage OK → valve/solenoid fault.

Quick Path

Jumper sensor terminals first. If it runs, disable sensor in menu or fix wiring. If not, test controller output.

Greenkeeper 212 is old—replacement (Toro Evolution, Hunter X-Core) is better than repair.