Rain Jet RJC-66 Flashing "1C/2C" Error—Relay and Wiring Check

Pump relay: Could be shorting controller output
Relay-controller wires: Check for cuts/damage
Controller-valve wires: Inspect for damage
Valve solenoids: Test each (20-60 Ohms) — faulty ones short controller

Rain Jet RJC-66 shows flashing "1C" (station 1) and "2C" (station 2) in manual mode. Pump power supply checks good.

Troubleshooting Sequence

Start with pump relay (high current device, common failure). Then field wiring. Then solenoids. "C" likely indicates "current" or "circuit" fault.

Irrigation: Rain Bird Controller On But Pump Not Starting: Test PS/MV Terminal Voltage; Rain Jet RJC-66 No Operation: Systematic Checks or Replace Controller; Rain Jet RJC-66 Zone 2C No Water in Auto: Valve Diaphragm or Solenoid; Troubleshooting Sprinkler System Error Codes After Plumbing Work; RainJet RJC‑6‑1 Timer Needs Replacement – Does RJC‑66 Support Pump Start?; Hardie Rain Dial 9‑Station Display Reverts to PM – Microprocessor Failing; Rain Jet RJC‑66 Flashing “6A” and “6C” – Programming Overlap; Rain Bird MSC-SAT-24: Single Zone Not Activating; Rain Jet Controller Battery Function—Optional Backup Only; Rain Dial 6/9/12 Station Controller Dead After 10 Years: Reset or Replace

Garden Articles

Plants