K-Rain 1522 Pump Start Relay Not Engaging Pump

Newly installed K-Rain 1522 pump start relay fails to activate the irrigation pump.

Voltage Verification Steps

Controller output: Measure 24VAC at controller's MV/Pump Start terminal when zone runs
Relay input: Measure 24VAC at relay's control terminals

24V at controller, none at relay: Broken/loose wire between controller and relay
24V at relay but pump doesn't start: Relay coil failure, contactor issue, or pump power problem
No 24V at controller: Controller output failure or programming issue

Most common: wire damage during installation or loose terminal connections. Check entire low-voltage run from controller to relay.

Irrigation: Irritrol SR1 Pump Start Relay Chatters After Lightning: Test Controller Output; Irritrol RD600 Pump Start Signal Every 60 Sec: Test Controller Output Continuity; Hunter PSR-52 Pump Start Relay Intermittent with ESP-SMT; Hunter Pump Start Relay Not Clicking? Check Voltage at Controller & Relay; Irritrol SR1 Pump Relay Troubleshooting: Voltage Drop Diagnosis; Rain Bird ESP Controller Interference from 220V Service Disconnect; Pump Start Relay Buzzes Only on Zone 3: Wiring Cross-Talk; K-Rain 1522 Pump Start Relay Buzzing: Replace Before It Kills the Pump; K-Rain Pump Start Relay Clicks On Then Off – Voltage Test Needed; Wiring Pump, Relay, and Controller for 220V Well Pump

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