What it means
Daikin's US service manual says it detects a locked compressor from the current waveform when it applies high-frequency voltage to the motor. The system shuts down if the error keeps repeating, and Daikin gives the reset condition as about 11 minutes of continuous running without any other error.
What to check, in order
- Reset at the breaker
Switch off the air conditioner's own breaker for 20 minutes, then switch on and restart with the remote.
- Mention a recent install
Daikin lists a closed stop valve as a cause. Tell the engineer if the unit is new or was recently moved.
When to call an engineer
Daikin's service manual lists a closed stop valve, a locked compressor and a disconnected compressor harness. An engineer tests the outdoor control board with an inverter analyser before condemning the compressor, which Daikin's flowchart replaces if the fault keeps returning.
A repair visit will usually check the compressor, its wiring and the inverter board that drives it.
- Note the model and serial number. They're on a label on the side of the indoor unit, and on the outdoor unit.
- Write down the exact code, and what the appliance was doing when it appeared.
- Check whether it's still under warranty. If it is, the repair may cost you nothing.
Quick answers
What does the Daikin E6 error code mean?
The compressor did not start turning when the control board tried to start it, so the system has stopped. Daikin's US service manual says it detects a locked compressor from the current waveform when it applies high-frequency voltage to the motor. The system shuts down if the error keeps repeating, and Daikin gives the reset condition as about 11 minutes of continuous running without any other error.
Can I fix Daikin E6 myself?
Engineer only (engineer visit). Start with: reset at the breaker; mention a recent install. Daikin's service manual lists a closed stop valve, a locked compressor and a disconnected compressor harness. An engineer tests the outdoor control board with an inverter analyser before condemning the compressor, which Daikin's flowchart replaces if the fault keeps returning.
Is Daikin E6 worth repairing?
Get a quote first. If the compressor itself has seized it is a big job. On an older system, compare the quote with the cost of a new unit.
Checked against
- Daikin Service Manual SiUS042113E, FTXM-V / RXM-V inverter pair wall mounted type (manualslib copy of the Daikin PDF)
- Daikin Service Manual SiUS04-924_A, RXS / FTXS H-series inverter pair wall mounted type (PDF)
- Daikin: Simple Self-Diagnosis by Malfunction Code, SM-TS3, list of error codes (PDF)
Last reviewed October 2026. Manufacturers update their pages, and your manual is the final word. Spotted a mistake? Email contact@appliance-error-codes.com.