Hunter EC, Owner'S Manual, Page: 14 / 16

TROUBLESHOOTING GUIDE
PROBLEM CAUSES SOLUTIONS
Display indicates watering but none is
occurring.
Faulty or miswired valve.
Faulty pump or pump relay.
No water pressure to system. Check valve and valve wiring.
Check pump and pump relay. Replace if defective.
Turn on main system water supply.
Display is blank.
No AC power reaching controller. Verify AC power and wiring. Correct any errors.
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.
Extended power outage has occurred that has drained
backup battery.
Set time/date.
Replace battery and reprogram controller.
Valve will not turn on. Short in wire connections.
Bad solenoid Check wiring for short or faulty wire connections.
Replace solenoid.
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.
Display shows “P ERR”.
Faulty pump relay or master valve wiring.
Incompatible or defective pump relay. Check wiring to relay or master valve solenoid. Press
any button to clear "P ERR" from the display.
Check eletrical specifications of pump relay. Replace
if defective.
The display reads “No AC”. There is no AC power present. Check to make sure power is on. Check to see if
transformer is properly installed.
Rain Sensor does not suspend irrigation.
Rain sensor is defective or miswired.
Jumper not removed.
Verify operation of sensor and proper wiring.
Remove jumper.
Frozen Display, or display showing incorrect
information. Power surge. Reset controller per page 10 “Clearing Controllers
Memory/Resetting the Controller”.
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