Daikin SkyAir

Daikin SkyAir Error Code LC

Troubleshooting guide for the Daikin SkyAir system fault LC.

ACLogics Standardize SkyAir diagnostics See the commercial workflow → Standardize SkyAir diagnostics

What It Means

Malfunction of transmission between control and inverter PCB.

Possible Causes

  • Defective connection between the inverter PCB and the control PCB.
  • External factors (e.g.
  • noise).
  • Defective inverter compressor.
  • Defective control PCB (transmission block).

Not sure which one it is — or if it's none of these? Try ACLogics today.

Disclaimer: This information is for general reference. Error codes can vary by model and production year. Always refer to your machine's specific manual and the information printed on the unit itself.
New to this code? Click to see why this happens

Full Diagnosis

Malfunction of transmission between control and inverter PCB

All Recorded Causes

Defective connection between the inverter PCB and the control PCB External factors (e.g. noise) Defective inverter compressor Defective control PCB (transmission block)

Verify Before Replacing Parts

  1. Confirm the exact Daikin model family and skyair context before acting on a generic code description.
  2. Confirm board LEDs, wiring polarity, and model compatibility before replacing control boards — this Daikin fault points at defective connection between the inverter PCB and the control PCB.
  3. Check for intermittent communication faults caused by connectors, moisture, or damaged harnesses, and rule out external factors (e.g. noise).
  4. After the correction, run the system long enough to confirm the skyair fault does not return under normal load.

Diagnosing SkyAir across a fleet?

ACLogics standardizes commercial SkyAir diagnostics across your whole team — consistent steps, less guesswork on every call.

See the commercial workflow →