Hunter ICC2 Irrigation Controller User Manual

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Hunter ICC2 Irrigation Controller: Complete Product Manual

Introduction to the Hunter ICC2 Irrigation Controller

The Hunter ICC2 Irrigation Controller is a modular commercial and large-residential irrigation controller designed to manage demanding landscape watering systems. It combines flexible scheduling, expandable station capacity, sensor compatibility, and multiple field-connection options in one controller platform.

Depending on the enclosure and installation configuration, the controller can operate conventional wired valves, Hunter EZ Decoder System two-wire devices, and Wireless Valve Link outputs. This makes it suitable for new irrigation installations, phased landscape expansions, and upgrades from compatible Hunter ICC systems. Metal and pedestal configurations can support up to 54 stations, while the plastic configuration supports up to 38 conventional stations.

The controller provides four independent irrigation programs with up to eight start times per program. Two programs may operate simultaneously, which is useful when separate landscape zones require overlapping schedules. Station run times can be configured for up to 12 hours, supporting low-flow zones, drip irrigation, and long watering cycles.

Built-in support for Hunter Clik sensors, Solar Sync sensors, and compatible flow-monitoring equipment helps reduce unnecessary watering and identify flow conditions. Optional communication upgrades can provide online management through Hunter Centralus software.

The Hunter ICC2 Irrigation Controller suits landscape contractors, property managers, municipalities, sports facilities, commercial sites, and homeowners with extensive multi-zone landscapes. It is best for users who need a durable, expandable irrigation system rather than a basic timer for a small garden.

Hunter ICC2 Specifications and Features

Controller type: Modular irrigation controller for commercial, industrial, and large residential landscapes.
Station capacity: Up to 38 conventional stations in the plastic enclosure and up to 54 stations in metal or pedestal configurations; two-wire and wireless configurations may also support up to 54 stations.
Programs: Four independent irrigation programs.
Start times: Eight start times per program.
Simultaneous operation: Up to two programs can operate at the same time.
Maximum station run time: Up to 12 hours.
Power input: 120/230 VAC transformer input.
Transformer output: 24 VAC, 1.4 A.
Station output: 24 VAC, up to 0.56 A.
Master valve or pump output: 24 VAC, up to 0.56 A through the P/MV terminal.
Sensor support: Compatible Hunter Clik and Solar Sync sensors, with supported flow-sensor connections.
Connection methods: Conventional wiring, EZ Decoder System two-wire control, and Wireless Valve Link outputs, depending on installed modules.
Enclosure options: Outdoor plastic, metal, stainless steel, and plastic pedestal models.
Outdoor protection: Enclosure ratings vary by model; confirm the rating printed on the controller and installation documentation before mounting.
Expansion: Modular station expansion allows the system to grow as additional irrigation zones are installed.
Online control: Optional communication kits can enable Centralus software connectivity.

How to Install and Set Up the Hunter ICC2 Irrigation Controller

Choose a suitable location. Mount the controller on a stable vertical surface protected from flooding, direct irrigation spray, and unauthorized access. Leave enough clearance for wiring and module installation.
Disconnect power. Switch off the dedicated electrical supply before opening the enclosure or connecting field wiring. Electrical work should comply with local codes and be performed by a qualified person.
Install the station modules. Fit the required conventional, decoder, or wireless output modules according to the controller documentation. Do not force a module into an incompatible position.
Connect valve wiring. Connect the common wire to the COM terminal and each zone wire to its corresponding station terminal. Connect the master valve or pump-start relay to P/MV when required.
Connect sensors. Install compatible Clik, Solar Sync, or flow-sensor wiring at the designated terminals. Follow the sensor manufacturer’s wiring and grounding instructions.
Restore power and set the clock. Program the current date, time, and seasonal settings. Remove the rear control-panel battery tab if required to activate the date and time backup battery.
Create watering programs. Assign stations, select watering days, add start times, and set run durations. Use separate programs for turf, shrubs, drip zones, or areas with different watering needs.
Test every station. Run a manual station test and inspect valves, sprinklers, wiring, and flow. If a station does not activate, switch off power before checking connections.

Keep high-voltage wiring separate from low-voltage valve wiring. Seal unused conduit openings, maintain proper grounding, and never work inside the controller while energized.

Hunter ICC2 Troubleshooting Guide

Controller has no display

Confirm that the circuit breaker, disconnect, and transformer supply are on. Check the controller fuse or internal protection devices if applicable. If incoming power is present but the display remains blank, disconnect power and have the transformer and controller inspected by a qualified technician.

A station does not operate

Check that the station is assigned to an active program and that its run time is greater than zero. Inspect the common wire, station wire, valve solenoid, and terminal screw. A shorted solenoid or damaged cable can prevent reliable activation.

The controller displays a station or wiring fault

Turn off power before testing resistance and continuity. Look for pinched wires, water-damaged splices, reversed decoder connections, or a failed solenoid. In a two-wire system, verify decoder addressing and inspect the two-wire path for shorts or open circuits.

Watering starts at the wrong time

Check the controller clock, program start times, seasonal settings, and watering-day schedule. Confirm that the sensor is not holding the system in a rain-delay condition. Review overlapping programs when two schedules are permitted to operate simultaneously.

Flow is too high or too low

Inspect valves, sprinkler heads, filters, pressure regulators, and broken lateral lines. If a flow sensor is installed, confirm its wiring, configuration, and measured flow range.

Preventive maintenance includes tightening accessible terminals, protecting wire splices, checking valve boxes, cleaning sensor equipment, and testing each zone before seasonal operation. The ICC2 is commonly covered by a five-year manufacturer warranty, but warranty conditions vary by region and product configuration. For manuals, replacement parts, technical support, and warranty assistance, use the official Hunter Industries support channel or contact an authorized Hunter irrigation distributor.

Hunter ICC2 Pros and Cons

Advantages

Highly expandable: Modular station capacity supports projects that may grow beyond a basic eight-zone controller.
Flexible field wiring: Conventional, two-wire, and wireless valve-control options can accommodate different installation layouts.
Commercial-grade scheduling: Four programs, eight start times per program, simultaneous program operation, and long station run times suit complex landscapes.
Sensor integration: Compatible weather, rain, and flow sensors can improve irrigation efficiency and help identify abnormal conditions.
Upgrade path: Optional communication kits support online management, while compatibility with earlier Hunter ICC systems can simplify some replacements.
Suitable enclosure choices: Plastic, metal, stainless steel, and pedestal formats provide options for different environments and installation requirements.

Limitations

More complex than a residential timer: Initial programming, modular expansion, and sensor setup may require installer knowledge.
Connectivity is not necessarily built in: Remote management generally requires an appropriate optional communication kit and compatible service configuration.
Model capacity varies: Maximum station count and environmental protection depend on the enclosure and installed modules.
Electrical installation requires care: The controller uses mains input and should be installed according to local electrical regulations.
Best suited to larger systems: A simpler residential controller may be more practical for a small landscape with only a few zones.

The Hunter ICC2 Irrigation Controller is a strong choice for contractors, facility managers, and property owners who value expansion and professional control. Users seeking a simple plug-and-program timer or an immediately cloud-connected controller may prefer a less modular alternative.

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Faqs

How do I set up the hunter ICC2 Irrigation Controller for the first time?

Mount the hunter ICC2 Irrigation Controller securely, connect the incoming power only after switching off the circuit, and wire each valve to its station terminal. Connect the common wire, then attach the master valve or pump-start relay if your system uses one. Set the date and time first, select a program, add station run times, choose watering days, and enter start times. Test each station manually before leaving the controller in automatic mode.

How do I program watering schedules on a hunter ICC2 Irrigation Controller?

Turn the dial to Start Times and press PRG to choose program A, B, C, or D. Enter only the start times needed for that program, because one start time runs every station assigned to it in sequence. Set individual station durations at Run Times, then configure watering days or interval scheduling. Use separate programs for areas with different watering needs, such as lawn zones, flower beds, and drip irrigation.

Why does my hunter ICC2 Irrigation Controller show ERR, and how can I fix it?

An ERR message usually indicates a short circuit in field wiring or a defective valve solenoid. Press a controller button to clear the message, then inspect the affected station’s wiring for damaged insulation, loose connections, or moisture. Test the solenoid and wiring with a suitable meter if available. Disconnect suspect stations one at a time to isolate the fault, and switch off power before making repairs.

What should I check if the hunter ICC2 Irrigation Controller says watering but no water comes out?

First verify that the water supply valve is open and that the system has adequate pressure. Next, inspect the active zone’s valve wiring, common wire, and solenoid for loose or damaged connections. Check whether the valve is clogged or stuck. If every zone fails, inspect the main supply, pump-start circuit, and master valve. Run one station manually to separate controller programming problems from field plumbing problems.

Can the hunter ICC2 Irrigation Controller work with sensors, remote controls, or two-wire systems?

The hunter ICC2 Irrigation Controller supports compatible Hunter sensor connections, including Clik and Solar Sync devices, and can work with Hunter remote-control accessories when the required interface is installed. Depending on the installed modules, it can also support conventional outputs, EZ Decoder System two-wire outputs, or Wireless Valve Link outputs. Confirm the exact module, wiring method, and accessory requirements before modifying an existing installation.

How can I stop the hunter ICC2 Irrigation Controller from watering continuously?

Check each program for duplicate or unintended start times. A single start time runs all stations assigned to that program, so several start times can repeat the complete sequence and appear continuous. Review station run times, especially unusually long durations, and confirm that programs A through D are not all active unnecessarily. Also check for overlapping schedules, manual operation, or a stuck valve that continues watering after the controller stops.

Why does my hunter ICC2 Irrigation Controller display NO AC?

NO AC means the controller is not detecting incoming alternating-current power. Check the circuit breaker, fuse, isolation switch, and power connection, but do not open the cabinet or handle wiring while energized. If the supply is present, inspect the transformer connection and look for loose terminals or visible damage. A qualified electrician should test the incoming voltage and transformer when the display remains blank or the warning returns.

What maintenance does a hunter ICC2 Irrigation Controller need each season?

Inspect the enclosure for cracks, water intrusion, insect activity, and loose cable entries. Check terminal connections, valve wiring, sensor connections, and the backup battery if fitted. Before the watering season, test every station manually and verify that valves close correctly. Clean the cabinet exterior without spraying water into it. Before freezing weather, follow local winterization procedures, including shutting off the supply and draining or blowing out irrigation lines when appropriate.