Daikin Air Conditioner Error LC

⚡ Quick Answer: The Daikin Air Conditioner LC error indicates a communication failure between the control PCB and inverter PCB in the outdoor unit, leading to system ... ⚠️ Difficulty Varies

What Does Error LC Mean?

The Daikin Air Conditioner LC error indicates a communication failure between the control PCB and inverter PCB in the outdoor unit, leading to system shutdown. This often results in the unit not operating, displaying the LC error code, and a lack of response from the outdoor unit. Users may also notice reduced cooling performance and unusual sounds, such as hissing. Potential causes include internal wiring faults, connector issues, or component malfunctions.

Common Symptoms:

  • System stops operation and refuses to run
  • Error code LC displayed on remote or unit panel
  • Outdoor unit does not respond or engage compressor

Possible Causes

  • Communication failure between inverter PCB and control PCB (medium)
  • Internal wiring fault or connector issue (medium)
  • Component malfunction (PCB, fan motor, noise filter) (medium)

How to Fix Error LC

DIY Fix Power cycle and basic check

  1. Turn off the air conditioner and disconnect from mains power for at least 3–5 minutes.
  2. Check the outdoor unit for visible wiring disconnections or obvious damage.
  3. Restore power and attempt restarting the unit to see if the LC code clears.

Technician Only Diagnose and repair communication/control PCB issue

  1. Use service tools to enter diagnostic mode and confirm LC error occurrence logs.
  2. Check and secure all PCB connectors between control and inverter boards.
  3. Test outdoor unit PCBs (control and inverter) and replace any faulty boards.
  4. Inspect and test associated components such as fan motor and noise filter for faults.

Parts needed: Control PCB, Inverter PCB, Wiring harness, Fan motor, Noise filter

🛑 When to Call a Pro:
  • If the LC code persists after power cycling
  • If there are signs of electrical burning or smell from outdoor unit
  • If the unit fails to restart at all

Next step

Choose the next step for LC

Confirm the diagnosis before ordering. An error code can identify the system involved, but it does not prove that a specific part has failed.

Based on diagnostic data

Most relevant component to inspect

HVAC Control Board

Controls fan, compressor, sensor, and communication functions in the HVAC unit.

Typical part-only price
$90 - $320
DIY difficulty
Hard
Estimated time
45-120 mins
Where can I find the model number?

Check the rating label around the door, lid, frame, rear panel, or inside the appliance cabinet. Use the complete model number, including suffixes.

Find a part that fits my model

Verify the complete model and part number on the retailer's compatibility page before ordering.

Other parts options

Check related components first; use model search as a fallback.

Possible related component

Wiring Harness

Connects controls, sensors, motors, and other electrical components inside the appliance.

$20 - $120 · Medium · 30-90 mins

Check fit & price
Model number required

Model-compatible Air Conditioner parts

Enter the complete model number to browse compatible replacement parts. This is a model-based parts search, not a diagnosis that a specific component failed.

Find a part that fits my model

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Optional routine care

Maintenance supplies

These products support cleaning or routine upkeep. They are separate from the possible repair components above and are not claimed to fix this error code or symptom.

Maintenance supply

Air Conditioner Fin Cleaner

For routine cleaning of accessible coil fins when permitted by the manufacturer. Disconnect power and follow product and appliance instructions.

View maintenance supply
Maintenance supply

Model-Compatible Washable AC Filter

A reusable filter option only where the appliance supports one. Match the full model, dimensions, and filter specification.

Compatibility check required: use the complete appliance model and compare the existing filter, bag, or specification before ordering.

Find one that fits my model

Affiliate disclosure: As an Amazon Associate I earn from qualifying purchases. Recommendations are based on routine-care relevance, not commission rate.

Technical Specifications

wattage 2000W
component Refrigerant System
resistance Not applicable for refrigerant systems
part_number R-410A
voltage_rating 230V AC

Common Questions

What does LC error mean on Daikin Air Conditioner?

The LC error indicates a communication failure between control and inverter PCBs, leading to system shutdown.

Can I fix Daikin Air Conditioner LC error myself?

Yes, you can try power cycling the unit and checking for visible wiring issues.

How much does it cost to fix LC error?

Repair costs range from ¥15,000 to ¥80,000+, depending on parts and region.

When should I call a technician for LC?

Call a technician if the error persists after power cycling or if you notice signs of burning.

Sources & References

Data last verified: 2026-07-22

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