ICM Controls ICM401A Monitor

The ICM401A is a universal 3-phase line voltage monitor engineered to protect expensive compressor motors and sensitive HVACR equipment from electrical failure. Operating on a universal 190-600 VAC range, this phase monitor detects phase loss, phase reversal, and unbalanced voltage conditions before they cause catastrophic motor burnout. Contractors will benefit from its versatile design, functioning as a direct replacement for P251-0030, S1-031-01922-000, and ICM401. Its Y-Out terminal provides an optional diagnostic connection for advanced system feedback. By monitoring the incoming power quality at the equipment level, this device prevents rapid short-cycling and ensures the motor protection circuit only energized when environmental power conditions are within safe operating parameters. The ICM401A features an adjustable delay timer to prevent nuisance tripping during temporary voltage fluctuations, making it a reliable standard for light commercial and industrial cooling applications.

• Broad Voltage Range: Works across 190-600 VAC, reducing the need to stock multiple specialized monitors on the truck.
• Fault Protection: Immediately interrupts the control circuit upon detection of phase unbalance or reversal to prevent permanent motor damage.
• Universal Compatibility: Serves as a drop-in replacement for the 7187 and other common OEM phase loss monitors.
• LED Diagnostics: Provides quick visual confirmation of line status to accelerate troubleshooting on-site.

How do I wire the ICM401A for a 24V control circuit?
The unit utilizes two 1/4 inch male spade terminals for the input line voltage and two for the output to the control circuit. Ensure the safety loop is wired in series with the contactor coil to break the circuit upon a fault detection.

What is the purpose of the Y-Out terminal on this monitor?
The Y-Out terminal is an optional connection point used for signal feedback to an external controller or alarm system to indicate a localized power failure or phase discrepancy.

Can the ICM401A be used on both Wye and Delta configurations?
Yes, this monitor is designed to stabilize and protect 3-phase motors regardless of the utility transformer configuration, provided the line-to-line voltage is within the 190-600V window.

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.