What it means
Daikin's US service manual calls it position sensor abnormality and says it is a compressor start-up failure picked up by the position detection circuit. 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
- Check for power problems
Daikin lists a supply voltage out of specification as a cause. Check whether there has been a power cut or a tripped breaker.
- Reset at the breaker
Switch off the air conditioner's own breaker for 20 minutes, then switch on and restart. If the code comes back, book an engineer.
When to call an engineer
Daikin's service manual lists supply voltage out of specification, a disconnected compressor harness, a faulty compressor, a faulty outdoor control board and a start-up failure caused by a closed stop valve.
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 H6 error code mean?
The control board could not confirm that the compressor was turning properly when it tried to start it, so it has stopped. Daikin's US service manual calls it position sensor abnormality and says it is a compressor start-up failure picked up by the position detection circuit. 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 H6 myself?
Engineer only (engineer visit). Start with: check for power problems; reset at the breaker. Daikin's service manual lists supply voltage out of specification, a disconnected compressor harness, a faulty compressor, a faulty outdoor control board and a start-up failure caused by a closed stop valve.
Is Daikin H6 worth repairing?
Get a quote first. It can be a loose harness or a board, but it can also be the compressor. Get it diagnosed and quoted.
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.