Overview

Certain KM and KG series wall-mounted indoor units may produce a rubbing or contact noise caused by misalignment of the crossflow fan during shipment.
The noise occurs when the fan contacts the base assembly inside the unit, typically on the left-hand side.

1. Identifying the Issue

  • Symptom: Rubbing or scraping sound from the left side of the indoor unit during operation.

  • Cause: Crossflow fan shifted laterally in transit, contacting the base assembly.

  • Affected area: Left side fan housing near the base plate.

2. Corrective Action Procedure

If contact noise is detected, follow these steps:

  1. Turn off the power supply and ensure the unit is completely isolated.

  2. Open the louver and insert a cross-head screwdriver through the fan guard.

  3. Rotate the crossflow fan slowly to locate the service access area (no fan blades visible).

  4. Locate the fan fixing screw through the access window.

  5. Loosen the screw slightly (one counter-clockwise turn).

  6. Shift the fan to the right by approximately 2 mm to create clearance between the fan and housing.

  7. Re-tighten the fixing screw and confirm the fan rotates freely.

  8. Restore power and perform a test run to ensure no abnormal noise is present.

⚠️ Note: Handle the fan carefully to avoid damaging blades during adjustment.

3. Affected Models

This issue applies to the following KM and KG series indoor units:

  • Europe: ASYG07–24KGTA/KGTB/KMTA/KMTB

  • Australia: ASTG09–24KMTC

  • India: ASGG12–18CGTA-B

  • Singapore: ASA09/12JGTA

  • Thailand: ASM09/12/18CGTA

  • Taiwan: ASC022–083CMTB/KGTA

Summary

If a crossflow fan contact sound is reported on KM or KG series wall-mounted units:

  • Inspect the fan alignment via the service access opening.

  • Adjust the fan’s lateral position (≈2 mm right) to eliminate contact.

  • Confirm smooth fan operation with no abnormal noise after adjustment.

This procedure resolves fan contact noise caused by shipping misalignment and restores normal, quiet operation.