Daikin VRV

Daikin VRV Error Code F6

Troubleshooting guide for the Daikin VRV system fault F6.

ACLogics Standardize VRV diagnostics See the commercial workflow → Standardize VRV diagnostics

What It Means

Abnormal high pressure or refrigerant overcharged.

Possible Causes

  • Refrigerant overcharged.
  • Disconnection of heat exchanger deicer thermistor Disconnection of outdoor air thermistor.
  • Disconnection of liquid pipe temperature thermistor.
  • Defective outdoor unit PCB.

Not sure which one it is — or if it's none of these? Try ACLogics today.

Disclaimer: This information is for general reference. Error codes can vary by model and production year. Always refer to your machine's specific manual and the information printed on the unit itself.
New to this code? Click to see why this happens

Full Diagnosis

Abnormal high pressure or refrigerant overcharged

All Recorded Causes

Refrigerant overcharged Disconnection of heat exchanger deicer thermistor Disconnection of outdoor air thermistor Disconnection of liquid pipe temperature thermistor Defective outdoor unit PCB

Verify Before Replacing Parts

  1. Confirm the exact Daikin model family and vrv context before acting on a generic code description.
  2. Verify airflow first, then confirm operating pressures and temperature relationship before adjusting charge, since refrigerant overcharged.
  3. Look for restrictions, iced coils, or dirty heat-transfer surfaces that can mimic a charge problem, and separately confirm disconnection of heat exchanger deicer thermistor Disconnection of outdoor air thermistor.
  4. After the correction, run the system long enough to confirm the vrv fault does not return under normal load.

Diagnosing VRV across a fleet?

ACLogics standardizes commercial VRV diagnostics across your whole team — consistent steps, less guesswork on every call.

See the commercial workflow →