Daikin Mini-Split Code A6
Soft lockout
Indoor fan motor or related abnormality. The Hall IC in the indoor blower reports a speed that never reaches the commanded speed and stays below half of the motor's maximum, so the control declares a fan fault.
Manual wording: “A6 Fan motor or related abnormality”
Documented for: FTXS series (DC motor), FDXS series (AC motor), H-Series, FTXM-W/V, RMXS indoor units
Likely causes, most common first
- Layer short inside the fan motor winding
- Breaking of wire inside the fan motor
- Breaking of the fan motor lead wires
- Defective capacitor of the fan motor (AC motor / FDXS ducted units)
- Reduction of power supply voltage (AC motor units)
- Defective indoor unit PCB
What you can safely check yourself
- Check nothing has fallen into or is jamming the indoor unit's air outlet
- Check and clean or replace the air filters
- Turn the system off at the breaker or disconnect switch and back on once
When to call a technician
A6 means the blower is not turning at the speed the board asked for. Testing the motor, its capacitor and the board requires opening the indoor unit's electrical box - call a technician.
A Daikin mini-split throwing this code repeatedly has a reason — clearing the code without fixing the cause just hides it.
Sources
- Service Manual - Inverter Pair FTXS-L Series / FDXS-L Series (SiUS091133) (Daikin, FTXS09/12/15/18/24/30/36LVJU wall mount, FDXS09/12LVJU ducted, RKS/RXS09-36LVJU outdoor) · checked 2026-08-25
- Service Manual - Inverter Pair Wall Mounted Type H-Series (SiUS04-924_A) (Daikin, FTXS30/36HVJU indoor, RKS30/36HVJU and RXS30/36HVJU outdoor) · checked 2026-08-25
- Service Manual - Inverter Pair Wall Mounted Type FTXM-W/V Series (SiUS042113EA) (Daikin, FTXM-W / FTXM-V (Daikin Atmosphera) wall-mount heat pump) · checked 2026-08-25
- Service Manual - Multi-Split Type Air Conditioners RMXS-L Series (SiUS181631EA) (Daikin, RMXS48LVJU outdoor, BPMKS048A2U/049A3U branch provider, CTXG/CTXS/FTXS/CDXS/FDXS/FVXS/FFQ indoor units) · checked 2026-08-25