ICM Controls ICM318 Control Board

The ICM Controls ICM318 Defrost Control Board is a high-performance heat pump defrost control engineered for reliability in residential and commercial applications. This versatile board serves as a cost-effective universal defrost control replacement, supporting multi-voltage input at 24 VAC, 120 VAC, or 240 VAC. Designed for precise timing, it features a 10-minute fixed defrost duration and field-adjustable, pin-selectable defrost intervals of 30, 60, or 80 minutes to accommodate varying regional climates and system loads. Technicians can rely on the 1/2 HP outdoor fan relay and the 1 amp reversing valve/strip heat output for seamless system integration. Whether you are addressing ice buildup on outdoor coils or optimizing HVAC heat pump efficiency, the ICM318 provides the rugged durability needed to maintain system uptime. This HVAC control board is a direct solution for professionals requiring consistent performance and broad compatibility across 50/60 Hz systems.

Technical Benefits for Contractors:

• Universal Voltage Support: Simplifies inventory by working across 24VAC, 120VAC, and 240VAC platforms.
• Customizable Defrost Cycles: Pin-selectable timings allow for fine-tuning based on specific environmental humidity and frost rates.
• High-Capacity Relay: Features a robust outdoor fan relay rated for 1/2 HP at 240VAC to handle heavy-duty blower motors.
• Dual Output Control: Dedicated 24VAC terminals for both strip heat and reversing valve synchronization.
• Reliability: Engineered by ICM Controls to withstand the electrical demands of year-round heat pump operation.

Common Technical Questions:

Can I use the ICM318 on a 50Hz electrical system?
Yes, the board is engineered for dual-frequency operation at both 50Hz and 60Hz.

How do I adjust the time between defrost cycles?
The interval is set using the onboard pins; simply move the jumper to select the 30, 60, or 80-minute setting based on your system requirements.

What is the maximum current for the W2 and O terminals?
The strip heat and reversing valve outputs are rated for up to 1 amp at 24VAC.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.