Green POWER LED off — Module has no power

What does POWER LED off mean?

The module is not receiving power, which prevents it from monitoring the system or controlling the compressor.

• No voltage at R and C module terminals.
• Control transformer issue.
• Wiring problem to the module's R and C terminals.

Click steps to track your progress.

1. 1

   Turn off unit power supply and install a lockout tag.

2. 2

   Verify that the R and C module terminals are connected.

3. 3

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

4. 4

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

5. 5

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