Error Code: EC 07 – Outdoor Fan Speed Out of Control

Error Code: EC 07 – Outdoor Fan Speed Out of Control
Applies to LETO and AURA Series

What this means:
The outdoor fan is spinning at a speed that’s too high or too low for normal operation. When this happens for an extended period, the unit will shut down to protect itself. It can be caused by a faulty fan motor, incorrect wiring, or a problem with the outdoor PCB.

Try this first (easy fix):

1. Turn off power to your mini split completely.

2. Wait 2 full minutes.

3. Turn the power back on and check the display.

• If the error is gone — the system is back to normal.

• If the error remains — continue below.

Next steps (for technicians):

• With power off, try turning the outdoor fan by hand:

  • If it doesn’t spin easily, inspect for physical obstruction or a damaged motor.

• Check wiring to the fan motor — ensure connections are correct and secure.

• Measure the voltage output from the PCB to the fan motor:

  • If voltage is incorrect → replace the outdoor PCB.

  • If voltage is normal but the fan speed is still out of control → replace the fan motor.

What you might need:

• Outdoor fan motor

• Outdoor fan assembly

• Connection wires

• Outdoor PCB

Helpful tip:
If your model uses a DC fan motor, check voltage readings between key pins (like Red–Black and White–Black). If voltages fall outside the expected ranges (e.g., Vcc not within 13.5–16.5V), the PCB may be at fault.

Click here to view the detailed guide.TS04-ODU