Copeland 543-0069-01 Diagnostic Module

The Copeland 543-0069-01 Comfort Alert UltraTech Diagnostic Module is the Emerson Climate Technologies diagnostic module built for Copeland Scroll UltraTech compressors. It runs on 24 VAC, 50/60 Hz (Class 2 circuits only, 1.5 VA) and its terminal block accepts Y2, Demand, Y, Data Port, L (T-stat), R (24 VAC), and C (Common), plus a CC SOL plug for the compressor’s solenoid connection. The 543-0069-01 is the OEM part number; it is also listed by Copeland distributors as a MODULE-DIAGNOSTIC COMP.

The module gives the tech a quick read on what the compressor and system are doing. The front panel has POWER, ALERT, and TRIP LED indicators, so you can see at a glance whether the module is powered, whether it has logged an alert, and whether the compressor has tripped. The Data Port connection allows a diagnostic connection for more detail. That is why Comfort Alert modules are one of the first things to check when a unit is short-cycling, locking out, or only running part of the time, and why a failed module can cause an intermittent complaint that looks like a compressor problem. Confirm that the compressor is a Copeland Scroll UltraTech model before you order, since the label on this module is specific to that compressor family.

Key Benefits

• Purpose-Built for UltraTech Scrolls: Labeled “For use with Copeland Scroll UltraTech compressors,” so it matches the compressor’s protection and control scheme.
• Clear LED Status: POWER, ALERT, and TRIP lights make quick diagnosis possible right at the unit.
• Standard 24 VAC Control Wiring: Powered from the 24 VAC control circuit through R and C, and wired to Y, Y2, L, and Demand.
• OEM Emerson / Copeland Module: The exact 543-0069-01 module, not a universal diagnostic look-alike.

Common Questions

• What voltage does it use? The module label shows 24 VAC, 50/60 Hz, 1.5 VA, for Class 2 circuits.
• Which compressors is it for? The label reads “For Use With Copeland Scroll UltraTech Compressors.”
• What do the lights mean? POWER shows the module is energized, ALERT shows an alert condition has been detected, and TRIP shows a compressor trip. Check the Comfort Alert literature for your unit for the flash-code meanings.

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.