Carrier HK50AA035 Board

The Carrier HK50AA035 Current Sensor Board is a critical OEM replacement part designed for high-precision compressor lockout protection in commercial HVACR systems, including Carrier 30GTN and 30RB chillers. This current sensing board monitors amperage levels in real-time to detect abnormal electrical conditions, preventing compressor motor damage from phase loss, locked rotors, or overcurrent events. As a factory-authorized part, the HK50AA035 ensures exact impedance matching and electrical characteristic alignment with the original control circuit, maintaining the safety integrity of the chiller control system. Built with a compact 3-inch by 3-inch footprint and CSA listed components, the board is engineered for industrial HVAC environments subject to high vibration and thermal fluctuation. For service technicians, this board is the direct solution for resolving compressor lockout codes where physical current monitoring has failed or drifted, ensuring the HVAC unit operates within established safety parameters without nuisance tripping.

• Precise Current Monitoring: Proactively detects electrical faults to prevent catastrophic compressor failure and costly motor rewinds.
• OEM Compatibility: Designed specifically for Carrier, Bryant, and Payne commercial units, ensuring seamless integration with existing wiring harnesses.
• Reliable Lockout Logic: Provides stable signal output to the main controller, reducing downtime caused by current sensor inaccuracies.
• Durable Construction: Engineered to withstand the rigors of mechanical rooms and outdoor chiller environments.

What are the signs of a failing current sensor board?
Technicians typically observe intermittent compressor lockout codes or the failure of the system to initiate cooling despite a call for stage operation. If the board fails to sense current on a functional compressor circuit, the safety logic will prevent operation.

Is the HK50AA035 interchangeable with other brands?
This is a Carrier factory-authorized component. To maintain system rating and safety agency approvals, it should only be used in specified Carrier, Bryant, or Payne models as a direct OEM replacement.

Does this board require calibration?
No, the Carrier HK50AA035 is a fixed-setpoint current sensing board designed to operate within the factory parameters of the supported equipment without field adjustment.

This item is not eligible for free shipping.

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.