Copeland 940-0001-69 Relay

The Copeland 940-0001-69 Relay is a mission-critical potential relay engineered for heavy-duty single-phase compressor start circuits. Designed for high-reliability applications, this component (GE part number 040-0166-28) features a 500V coil rating to handle the intense back-EMF generated during the starting cycle of industrial and commercial refrigeration units. With a calibrated pickup voltage of 320-340V and a dropout range of 60-160V, it ensures precise disconnection of the start capacitor once the motor reaches sufficient angular velocity. Built with a robust 1-pole configuration and male quick-connect terminals, it facilitates rapid field replacement for technicians troubleshooting locked rotor amperage (LRA) issues or failed start components. This OEM-spec relay is a direct match for many high-horsepower Copeland compressors, providing the consistent voltage regulation required to protect windings from sustained high-current draws and heat buildup.

• Precise Voltage Transition: Calibrated pickup and dropout specs prevent start winding overheating by ensuring the capacitor drops out exactly when required.
• High-Voltage Durability: The 500-volt coil rating provides a significant buffer against transient voltage spikes in demanding HVACR environments.
• Simplified Installation: Standardized male quick-connect terminals and a single-pole layout streamline the wiring process during emergency service calls.
• OEM Compatibility: Specifically engineered as the Copeland 040-0166 series, guaranteeing exact electrical matching for compatible compressor models.

• What are the symptoms of a failing potential relay? If you hear the compressor humming followed by the thermal overload tripping, or if the start capacitor is physically bulging, the relay likely failed to drop the start circuit out, or the contacts have remained open.
• Can I use a generic 5-2-1 relay as a substitute? While universal relays work in some scenarios, staying with the Copeland 940-0001-69 ensures the specific pickup and dropout voltages match the motor's design torque, preventing long-term winding damage.
• How do I verify the operational state of this relay? Use a multimeter to check the resistance of the coil across terminals 2 and 5 (depending on the specific wiring diagram). An "OL" or open reading indicates a failed coil that requires immediate replacement.

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.