العربية
H6

Compressor Position Detection Sensor Abnormality

Home Appliance Error Codes Daikin Split AC

Severity High Get it checked soon and avoid long use.
Can you still use it? No, unplug it
Who can fix it? Needs an authorized technician
Typical repair time 30 minutes – 8 hours
Typical cost SAR 100 to 5,000

What it means

This code appears on Daikin inverter split, ducted and cassette air conditioners and means the outdoor board could not detect the position of the compressor rotor during startup, which it needs to drive the compressor at the right speed. The unit stops after several attempts, and the same code can mean something else on other brands.

Models covered: Daikin split air conditioners and Daikin ducted/cassette (SkyAir) units, which share the same error code system; the code shows on the wired remote or via the wireless remote check function.

Related codes: E6H0L5

Symptoms3

  • The compressor tries to start, then stops and H6 appears.
  • Vibration or stuttering noise from the outdoor unit when starting.
  • No cooling, and the code may repeat with every attempt.

Possible causes5

  • Loose, burnt or wrongly ordered compressor wiring.
  • Low supply voltage at startup.
  • A faulty outdoor PCB or power module (IPM).
  • A compressor winding fault.
  • A mechanically seized compressor or unequalized pressures at startup.

How to diagnose5

  1. Switch the unit off at the breaker for at least ten minutes, then restart.
  2. Check that the supply voltage is stable.
  3. A technician checks the compressor wiring and phase order after discharging the inverter board.
  4. The technician measures compressor winding resistance and insulation against Daikin specifications.
  5. The technician tests the board output per the service manual to decide whether the board or the compressor is at fault.

How to fix5

  1. Reconnect the compressor wiring in the correct order and repair burnt terminals.
  2. Fix the voltage problem or fit a voltage protector.
  3. Replace the outdoor PCB if its output is proven faulty.
  4. Replace the compressor if proven faulty, with evacuation and recharge.
  5. Run and test the unit and confirm the code does not return.

Repair cost

In Saudi riyals; the highlighted part is the expected range for this fault.

Wiring and voltage fixes are the cheapest, the outdoor board is expensive, and an inverter compressor is the top of the range.

Prices are rough estimates including the part and the technician’s fee, and vary with brand, model and part source.
Prices last updated: September 2026

Frequently asked questions

Is there a separate sensor I can replace?

On most Daikin residential inverter models there is no separate sensor; the board works out the position from the compressor winding signals, so the fix lies in the wiring, the board or the compressor.

What is the difference between H6 and E6?

Both appear when the compressor fails to start, but H6 points specifically to failed rotor position detection, while E6 covers a locked compressor or startup failure in general. Both call for checks of the wiring, board and compressor.

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This guide is for information only and does not replace an inspection by a qualified technician. If the fault involves brakes, steering, engine temperature, electrics or refrigerant, do not attempt the repair yourself.

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Related codes

E6 Compressor Lock or Startup Failure High Daikin Split AC H0 Compressor Sensor System Abnormality High Daikin Split AC L5 Inverter Output Overcurrent High Daikin Split AC F3 Discharge Pipe Temperature Control High Daikin Split AC A1 Indoor PCB Defect High Daikin Split AC E3 High Pressure Protection High Daikin Split AC