SPW Hunter Pro-C P2C-400 4-Station Irrigation Controller — Modular, Short-Circuit Protection

The SPW Hunter P2C-400 is a 4-station indoor/outdoor irrigation controller that offers modular expansion up to 32 stations, smart sensor support, and built-in diagnostics for reliable landscape watering.

The P2C-400 (also known as the updated PC400/PC400i replacement) is a versatile modular controller designed for residential and commercial irrigation systems. Prewired with a power cord for quick setup, it combines simple programming, seasonal adjustments, and fault protection with optional expansion modules to grow from the factory 4 stations up to a full 32-station system. Its large backlit display, sensor programmability, and Solar Sync compatibility make it a practical choice for installers and property owners focused on efficient, low-maintenance irrigation.

How does the P2C-400 protect my system from wiring faults?

The P2C-400 includes automatic short-circuit protection that detects wiring faults and isolates only the affected station so the rest of the system can continue running. The QuickCheck function helps you locate the problem station quickly by displaying an ERR message for the specific circuit, reducing troubleshooting time in the field.

• Automatic detection of short circuits and skipping of only impacted stations
• QuickCheck button that flags the exact station number with an error
• Minimizes downtime and avoids manual station-by-station testing

Can this controller adjust watering automatically for seasonal changes?

Yes — the controller supports global seasonal adjustment and integrates with Solar Sync for automatic run-time updates based on weather. You can apply a single percentage adjustment to all programs or let Solar Sync manage run times dynamically to conserve water during cooler or wetter periods.

• Global seasonal adjustment dial for quick manual scaling of run times
• Dedicated Solar Sync dial position for automatic, weather-based changes
• Works with two standard sensor inputs to pause or modify programs when needed

What expansion and programmable options are available?

The P2C-400 ships as a 4-station controller but supports conventional wiring up to 23 stations and hybrid EZ Decoder expansion up to 32 total stations. It includes three independent programs with up to four start times each, a pump/master valve output, and flexible station delay settings to accommodate valves or pressure tanks.

• Factory 4-station base, expandable via optional modules or hybrid decoders
• 3 irrigation programs with 4 start times per program for tailored schedules
• Adjustable delay between stations for valve closure or pump recharge
• Pump/mv output for pump start relay and master valve control

How does sensor and non-water day programming work?

The controller provides two sensor inputs and lets you assign which program to suspend when a sensor trips, allowing unaffected programs to continue. You can also predefine non-water days (for mowing, events, or local restrictions) so watering does not run on specified days regardless of intervals.

• Two sensor inputs compatible with Hunter Clik and Solar Sync devices
• Selective sensor shutdown to limit impact to chosen programs only
• Non-water days can be scheduled in advance to block irrigation on specific weekdays

Who is this for: Installers, landscape managers, and homeowners who want a compact but expandable controller with field-friendly diagnostics and smart water-saving features. The prewired power cord simplifies installation for indoor or outdoor mounting, while the modular architecture and Solar Sync compatibility give flexibility for growing properties or retrofits where efficient, programmable irrigation is needed.