Compressor Will Not Start But Outdoor Fan Runs - Missing 3-phase power.

What does One leg of 3-phase power dead. mean?

On a 3-phase unit, one of the three power supply lines is not receiving power, preventing the compressor from starting correctly.

• Blown fuse or tripped breaker on one phase.
• Loose connection in the power supply wiring.
• Issue with the electrical utility feed.

Click steps to track your progress.

1. 1

   Turn off power to the unit at the main disconnect.

2. 2

   Check all fuses or circuit breakers related to the 3-phase power supply.

3. 3

   Verify that all three power leads are securely connected at the unit's terminal block.

4. 4

   Contact an electrician or qualified technician to test the incoming power phases.