Hunter ACC2 Irrigation Controller User Manual

Hunter ACC2 Irrigation Controller Manual

Introduction to the Hunter ACC2 Irrigation Controller

The hunter ACC2 Irrigation Controller is a commercial-grade irrigation management system designed for demanding landscapes, sports fields, campuses, parks, municipal properties, and other large installations. Its modular architecture supports conventional wiring and can be expanded from 12 to 54 stations, allowing the controller to grow with the irrigation system.

Built for detailed water management, the ACC2 provides up to 32 independent programs, multiple start times, adjustable station run times, cycle-and-soak operation, delay between stations, non-water windows, and programmable rain delays. These controls help irrigation professionals schedule watering accurately while reducing runoff and avoiding unwanted operation during restricted periods.

The controller also supports flow monitoring, leak detection, Solar Sync weather-based adjustment, Clik sensor inputs, and multiple pump or master-valve outputs. Detailed messages and logs assist with diagnosing electrical, hydraulic, and communication problems.

This Hunter irrigation controller is intended for landscape contractors, facility managers, irrigation technicians, golf and sports-turf professionals, and property owners responsible for large automated watering systems. It is especially suitable where dependable scheduling, expansion capability, flow supervision, and centralized diagnostics are more important than the simplicity of a residential timer.

Hunter ACC2 Specifications and Features

• Controller type: Modular commercial irrigation controller.
• Station capacity: Expandable from 12 to 54 conventional stations.
• Programs: Up to 32 independent programs.
• Start times: Up to 10 start times per program.
• Station run time: Programmable from 1 second to 12 hours.
• Expansion method: Six-station plug-in expansion modules.
• Transformer input: 120/230 VAC.
• Transformer output: Approximately 24 VAC, 3 A.
• Station output: Up to 0.8 A per station.
• P/MV outputs: Up to six 24 VAC pump or master-valve outputs, depending on configuration.
• Sensor inputs: Three Clik sensor inputs, one Solar Sync input, and up to six flow-sensor inputs.
• Water-management tools: Flow monitoring, leak diagnostics, cycle and soak, rain delay, and non-water windows.
• Enclosure options: Metal, stainless steel, plastic wall-mount, and plastic pedestal versions.
• Warranty: Five-year manufacturer warranty.

Detailed Hunter ACC2 Controller Description

The ACC2 manages irrigation by activating connected valves according to programmed schedules. Each station can receive its own run time, seasonal adjustment, sensor response, flow parameters, and operational restrictions. Programs organize watering events, while start times determine when those programs begin.

Its modular design places station expansion modules inside the controller, helping installers match controller capacity to the number of irrigation zones. Flow sensors can provide real-time hydraulic information, allowing the system to identify conditions such as excessive flow, possible leaks, or abnormal operation. Clik sensors can suspend watering when configured environmental conditions occur, while Solar Sync can adjust watering according to local weather conditions.

For daily operation, users can review schedules, start or stop stations manually, inspect messages and logs, and verify module status from the controller interface. Keep the enclosure closed, dry, and free from insects or debris. Clean the exterior with a soft, slightly damp cloth; do not spray water, solvents, or pressurized air into the enclosure.

How to Install and Set Up the Hunter ACC2

1. Choose a secure, accessible mounting location protected from flooding, direct mechanical damage, and excessive heat.
2. Switch off the supply circuit before opening the enclosure or making electrical connections. Installation should be performed by a qualified technician and must follow local electrical codes.
3. Mount the controller and install the appropriate expansion modules for the required station count. Confirm that each module is fully seated.
4. Connect the field valve wires to the numbered station terminals. Connect the common wire to the controller common terminal and label every conductor.
5. Connect pump or master-valve wiring only to the correctly identified P/MV terminals. Verify load requirements before energizing the system.
6. Install Clik, Solar Sync, and flow sensors according to their wiring and placement requirements. Configure each sensor in the controller menus.
7. Restore power and confirm that the display, power indicators, modules, and facepack connection operate normally.
8. Set the date, time, language, station names, program schedules, run times, start times, seasonal adjustment, and non-water windows.
9. Configure flow limits and delays only after confirming normal irrigation flow. Run each station manually and inspect valves, sprinklers, wiring, and drainage.
10. For a communication or decoder installation, check the wire path, connections, resistance, and decoder response before programming operation.

Never work on energized wiring, bypass safety sensors without authorization, or operate pumps and valves beyond their electrical ratings. If the controller will not display information, confirm power, the facepack cable, and both slide locks before continuing.

Hunter ACC2 Troubleshooting Guide

• No display: Confirm the controller has power, the facepack cable is connected, and both slide locks are closed. Check the power-supply-board status light.
• Programs or stations will not run: Review the program and station summaries. Check start times, station run times, seasonal adjustment, rain delay, sensor status, and non-water windows.
• Attention messages appear: Open the messages and logs, then follow the reported station, module, sensor, or flow information.
• Overflow or excessive-flow message: Check for broken pipes, stuck valves, sprinkler damage, incorrect flow settings, or flow delays that are too short.
• Flow is not detected: Inspect flow-sensor wiring, sensor direction, configuration, and the sensor’s physical installation.
• Electrical or module fault: Open Diagnostics and Module Info. Isolate the affected module and inspect connectors only after power is disconnected.
• Decoder communication failure: Check the two-wire path, splices, resistance, decoder connections, and decoder response.
• Repeated nuisance alarms: Verify that normal flow limits, delays, sensor calibration, and valve operation match the installed hydraulic system.

Record messages and logs before resetting the controller. For unresolved issues, contact an authorized Hunter irrigation distributor, qualified irrigation professional, or Hunter technical support. Keep the controller model, enclosure type, module arrangement, wiring details, and displayed message available when requesting assistance. Warranty service may require proof of installation and purchase; consult current Hunter warranty terms for eligibility.

Hunter ACC2 Pros and Cons

Advantages

• Large system capacity: Expansion to 54 conventional stations suits commercial landscapes and complex properties.
• Advanced scheduling: Numerous programs and start times support separate turf, shrub, sports-field, and drip-irrigation schedules.
• Strong diagnostic tools: Flow monitoring, event logs, sensor status, and module diagnostics provide more information than typical residential timers.
• Flexible sensing: Clik, Solar Sync, and flow-sensor support enables weather response and hydraulic supervision.
• Expandable hardware: Six-station modules let installers scale the controller instead of replacing the main unit.
• Commercial construction: Multiple enclosure options and surge-protected expansion hardware support demanding installations.

Limitations

• Complex configuration: The extensive programming options require planning and technician knowledge.
• Installation demands: High-voltage connections, pump control, sensors, and large valve systems should not be handled casually.
• More hardware than needed for small yards: A basic residential controller may be easier for a few zones and simple schedules.
• Maintenance responsibility: Flow alarms and sensor features are useful only when sensors are correctly installed, configured, and maintained.

The Hunter ACC2 is best for commercial and large-scale irrigation systems requiring expansion, detailed scheduling, and diagnostics. Users seeking a simple plug-and-play controller for a small garden may be better served by a smaller residential model.