Yellow ALERT LED * flashes (misreported) — Welded Contactor check

What does ALERT LED * flashes Yellow (misreported) mean?

This indicates a potential misreporting of the 'Welded Contactor' code. Confirm the Y terminal connection and voltage.

• Module's Y terminal is not connected.
• Incorrect Y terminal connection.
• Contactor coil not dropping below 0.5VAC when off.
• R and C are reverse wired.

Click steps to track your progress.

1. 1

   Turn off unit power supply and install a lockout tag.

2. 2

   Determine if the module's Y terminal is properly connected.

3. 3

   Verify the Y terminal is connected to 24VAC at the contactor coil.

4. 4

   Check that the voltage at the contactor coil falls below 0.5VAC when off.

5. 5

   Confirm that R and C terminals are not reverse wired.

6. 6

   Ensure 24VAC is present across Y and C when the thermostat demands operation.