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POWER LED Green

Green POWER LED on — Module has power

Bryant · Comfort Alert Diagnostic Module

What does POWER LED Green mean?

This indicates that the Comfort Alert Diagnostic Module (CADM) is receiving the necessary control power to operate.

Common Causes

  • Sufficient 24VAC power supply is present at the module's R and C terminals.

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Verify that the R and C module terminals are connected.

  2. 2

    Check for 24VAC voltage at the module's R and C terminals.

  3. 3

    Ensure the R and C terminals receive power directly from the control transformer.

  4. 4

    Confirm the module is not powered by another device that could interrupt the 24VAC supply.

Browse all codes in this manual (55)
Verified technical data. Last updated: April 2026

Related Faults

ALERT LED * flashes Yellow (misreported)Yellow ALERT LED * flashes (misreported) — Welded Contactor checkALERT LED 2 flashes YellowYellow ALERT LED 2 flashes — System pressure trip or compressor overloadALERT LED 3 flashes YellowYellow ALERT LED 3 flashes — Compressor short cycling
Source: Bryant Comfort Alert Diagnostic Module
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