Hunter HPC Controller Troubleshooting Guide

Hunter HPC Hydrawise Troubleshooting

The Hunter HPC Hydrawise Wi-Fi Irrigation Controller is designed for reliable irrigation management. If you’re experiencing issues with your controller, use the troubleshooting steps below to identify and resolve common problems.

1. Controller Will Not Power On

Possible Causes

• No mains power
• Blown transformer
• Loose wiring
• Internal fuse issue

Solution

✔ Check the power outlet.

✔ Verify the transformer is supplying the correct voltage.

✔ Inspect the controller power terminals for loose wiring.

✔ Reset the circuit breaker if required.

✔ If the display remains blank, contact your irrigation professional.

2. Controller Won’t Connect to Wi-Fi

Possible Causes

• Weak Wi-Fi signal
• Incorrect Wi-Fi password
• Unsupported 5GHz network
• Router settings

Solution

✔ Move the Wi-Fi router closer to the controller.

✔ Ensure the controller connects to a 2.4GHz Wi-Fi network.

✔ Restart both the router and controller.

✔ Re-enter your Wi-Fi password using the Hydrawise setup wizard.

✔ Check that your internet connection is working.

3. Controller Shows “Offline”

Possible Causes

• Internet outage
• Router restarted
• Poor wireless signal

Solution

✔ Check your internet connection.

✔ Restart your router.

✔ Restart the Hunter HPC controller.

✔ Confirm Wi-Fi signal strength inside the controller menu.

4. Stations Will Not Turn On

Possible Causes

• Faulty solenoid
• Broken field wire
• Blown fuse
• Damaged valve

Solution

✔ Test the station manually.

✔ Check valve wiring.

✔ Measure solenoid resistance with a multimeter.

✔ Inspect wire joins for corrosion.

✔ Replace faulty solenoids if necessary.

5. Sprinklers Stay On

Possible Causes

• Stuck valve
• Debris inside diaphragm
• Master valve issue
• Controller wiring fault

Solution

✔ Turn off the water supply.

✔ Clean the irrigation valve.

✔ Replace damaged diaphragms.

✔ Check the station wiring.

6. Watering Schedule Doesn’t Run

Possible Causes

• Rain sensor active
• Seasonal adjustment set to 0%
• Program disabled
• Start time deleted

Solution

✔ Check active programs.

✔ Verify start times.

✔ Confirm watering days.

✔ Disable rain delay if appropriate.

✔ Ensure Seasonal Adjustment is above 0%.

7. Hydrawise App Not Syncing

Possible Causes

• Controller offline
• App logged out
• Internet connection issue

Solution

✔ Refresh the Hydrawise app.

✔ Log out and back in.

✔ Confirm the controller is online.

✔ Restart the controller if required.

8. Rain Sensor Always Active

Possible Causes

• Faulty rain sensor
• Wet sensor
• Incorrect wiring

Solution

✔ Inspect the sensor.

✔ Allow it to dry completely.

✔ Check sensor wiring.

✔ Test the controller with the sensor disconnected.

9. Flow Alerts

Possible Causes

• Pipe leak
• Broken sprinkler
• High flow
• Low flow
• Faulty flow meter

Solution

✔ Inspect all irrigation zones.

✔ Check for leaks.

✔ Replace broken sprinklers.

✔ Verify HC Flow Meter installation.

10. Touchscreen Not Responding

Possible Causes

• Software issue
• Dirty screen
• Frozen controller

Solution

✔ Restart the controller.

✔ Clean the display using a soft cloth.

✔ Update firmware through Hydrawise if available.

Error Messages

When to Contact an Irrigation Professional

Seek professional assistance if:

• The controller will not power on after checking power.
• Electrical wiring is damaged.
• Multiple stations fail simultaneously.
• The controller repeatedly loses Wi-Fi connection after troubleshooting.
• Flow alarms continue after leaks have been repaired.
• You suspect internal controller damage.

Preventative Maintenance

To keep your Hunter HPC operating reliably:

• Clean the controller annually.
• Check wiring connections every season.
• Test all irrigation zones regularly.
• Inspect valves for leaks.
• Update Hydrawise firmware when available.
• Verify Wi-Fi signal strength after changing your router.
• Test the rain sensor before each irrigation season.