Daikin Air Conditioner Error C6
⚡ Quick Answer: The Daikin Air Conditioner C6 error indicates a communication failure between the indoor and outdoor units, often linked to issues with the indoor mai... ✅ DIY Fixable
What Does Error C6 Mean?
The Daikin Air Conditioner C6 error indicates a communication failure between the indoor and outdoor units, often linked to issues with the indoor main PCB and fan control hardware. Symptoms include the indoor unit ceasing operation, an unresponsive fan, and a C6 error display on the unit or remote. Typically, this is caused by loose connections or communication problems between the PCB components.
Common Symptoms:
- Indoor unit stops running when error occurs
- Fan may not operate or may stop unexpectedly
- Error displayed on indoor unit/remote indicating C6
Possible Causes
- Communication failure between indoor main PCB and fan print circuit board (medium)
- Incorrect or loose connection of capacity setting adapter or related connectors (medium)
How to Fix Error C6
DIY Fix Basic verification and power reset
- Turn off the AC unit via remote or main switch.
- Turn off power at breaker and wait ~5–10 minutes.
- Restore power and retry starting unit.
Technician Only Diagnose and repair PCB communication and fan controls
- Inspect indoor unit main PCB and fan PCB connectors for fit and correct model compatibility.
- Verify correct capacity setting adapter installation.
- Test fan motor control driver and sensor functionality.
- Replace defective PCB(s) or adapters as required.
Parts needed: Indoor main PCB, Fan PCB, Capacity setting adapter
- If error persists after power reset
- If there are signs of electrical damage or incorrect PCB installation
Technical Specifications
| wattage | N/A |
|---|---|
| component | Control Board |
| resistance | N/A |
| part_number | DAIKIN PCB-123456 |
| voltage_rating | 220V AC |
Common Questions
What does C6 error mean on Daikin Air Conditioner?
C6 error signifies a communication failure between the indoor and outdoor units, often causing the unit to stop working.
Can I fix Daikin Air Conditioner C6 error myself?
Yes, you can try a power reset by turning off the AC and the circuit breaker for 5-10 minutes before restarting.
How much does it cost to fix C6 error?
Repair costs for the C6 error range from ¥15,000 to ¥80,000+, depending on parts and labor.
When should I call a technician for C6?
Call a technician if the error persists after a power reset or if you notice signs of electrical damage.
Sources & References
- Daikin AC error code C6 explanations (community)
Data last verified: 2026-07-01
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