Low air velocity at the nozzle may indicate one of several possible issues. The most common causes include:

– **Fans rotating in the wrong direction**: This usually occurs when a 3-phase unit is wired incorrectly. The unit may still blow air, but at significantly reduced volume. The solution is simple: have a qualified electrician **swap any two of the three power wires** to reverse the fan rotation.

– **Incorrect voltage**: If the unit is wired for the wrong voltage or phase, it may operate at reduced power or fail to start. Always confirm electrical specs before energizing the unit.

– **Obstructions**: Blockages at the air intake or nozzle can restrict airflow. Ensure that filters, inlets, and outlets are clean and unobstructed.

– **Blower or fan misalignment**: Internal fans that are loose, off-balance, or misaligned can reduce performance and increase noise.

If you’re unsure of the cause, consult a qualified technician or contact Miniveil for technical support.