Troubleshooting Guide

PROBLEM CAUSES SOLUTIONS
Display indicates watering but none is occurring. Faulty or miswired valve. Check valve and valve wiring.
Faulty pump or pump relay. Check pump and pump relay. Replace if defective.
No water pressure to system. Turn on main system water supply.
Display is blank. No AC power reaching controller. Verify AC power and wiring. Correct any errors.

Check transformer output.

Display is blank with AC power to terminal and with a new battery.

Controller may be damaged by power surge. Call your dealer or Hunter installer.
Time of day display is blinking. Unit has just been powered up for the first time. Set time/date.
Extended power outage has occurred that has drained backup battery. Replace battery and reprogram controller.
Rain sensor does not suspend irrigation. Rain sensor is defective or miswired. Verify operation of sensor and proper wiring.
Jumper not removed. Remove jumper.
Automatic irrigation does not start at start time and controller is not in the system off mode. AM/PM of time of day not set correctly. Correct AM/PM of time of day.
AM/PM of start time not set correctly. Correct AM/PM of start time.
Start time is disabled (Set for Off). Rain Sensor is preventing operation. Turn dial to Automatic.
Controller is not receiving AC power. Check AC connections.
Valve will not turn on. Short in wire connections. Check wiring for short or faulty wire connections.
Bad solenoid. Replace solenoid.
Controller waters the same area more than one time. Too many start times entered in program. One start time activates a complete cycle. See “Setting Start Times.”
Display shows “ERR” with a number (1-6). Short in valve wiring circuit; or a faulty solenoid on the station number indicated. Check wire circuit or solenoid for the valve number indicated. Repair short or replace solenoid. Press any button to clear “ERR” display.