Icm Controls icm301 Heat Pump Defrost Timer Control Board Pin-selectable 30/60/90 Min Interval

Product Description

The ICM Controls ICM301 is a heat pump defrost timer control board designed for residential and light commercial HVAC systems. It combines multiple time and temperature defrost functions into a single, compact open board package. The board is conformally coated, which protects the electronic components from moisture, dust, and corrosion. This makes it suitable for use in outdoor heat pump units where environmental exposure is a concern.

Heat pumps accumulate frost and ice on the outdoor coil during cold weather operation. Without regular defrost cycles, ice buildup reduces system efficiency and can cause equipment damage. The ICM301 automates the defrost process by controlling when and how long the defrost cycle runs. The defrost interval is pin-selectable at 30, 60, or 90 minutes, giving HVAC technicians flexibility to match the control to the specific system requirements. The defrost cycle runs for a fixed 10 minutes, plus or minus 5 percent, ensuring consistent and repeatable operation every time.

The ICM301 operates on 18 to 30 VAC at 50 to 60 Hz, which is standard for most residential heat pump control circuits. Power consumption is 1 watt maximum, so it draws very little energy during normal operation. The onboard relay is rated at 1 amp and uses a single-pole single-throw normally open configuration. This relay output connects to the defrost relay or contactor in the heat pump system to initiate and terminate the defrost cycle.

The operating temperature range is negative 40 to positive 167 degrees Fahrenheit, making it reliable in extreme cold and hot environments. HVAC service technicians use the ICM301 as a direct replacement for failed or malfunctioning defrost timers in heat pump systems. It is a cost-effective solution for restoring proper defrost control without replacing the entire control board assembly.

• Conformal coating protects the open board from moisture, dust, and corrosion in outdoor heat pump applications
• Pin-selectable defrost interval of 30, 60, or 90 minutes allows field adjustment to match system needs
• Wide operating temperature range of negative 40 to positive 167 degrees Fahrenheit for reliable performance in all climates

Product Highlights

The ICM Controls ICM301 heat pump defrost timer delivers reliable, adjustable defrost control in a durable, conformally coated package. It is a direct replacement for defrost timer boards in heat pump systems and supports pin-selectable intervals for flexible field configuration.

Product Information

Standard Information

• Brand: ICM CONTROLS
• Manufacturer Part Number: ICM301

Technical Specifications

• Voltage: 18/30 VAC
• Frequency: 50-60 Hz
• Power Consumption: 1 watt maximum
• Relay Type: Relay
• Relay Form: SPST, N.O.
• Relay Rating: 1 amp
• Defrost Time: Fixed 10 minutes (plus or minus 5 percent)
• Interval Between Defrosts: Pin-selectable 30, 60, or 90 minutes
• Operating Temperature Range: -40 to 167 degrees Fahrenheit