Irritrol SR1 Pump Start Relay Chatters After Lightning: Test Controller Output

New Rain Bird SST-1200o Controller, Pump Cycles On/Off Rapidly

Pump runs 8 sec, off 5 sec, on 2–3 sec, then stops. Buzzing from SR1 relay. Controller shows zone error.

Diagnosis: Isolate Pump Start Circuit

1. Disconnect pump start wire from controller terminal.
2. Run zones manually.
3. If controller shows no errors: Valves/wiring OK. Fault in SR1 relay or its wiring.
4. If controller shows errors on specific zones: Those zones have solenoid/wiring faults.

Next Steps

If valves check out, test SR1 relay and pump. Relay may be damaged from lightning. Pump itself could have issues — consult a pump specialist.