What It Means
Improper combination between inverter and fan driver.
Daikin VRV
Daikin VRV Error Code PJ
Troubleshooting guide for the Daikin VRV system fault PJ.
Possible Causes
- Mis-matching of type of PCB.
- Improper (or no) field setting after replacing outdoor unit main 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.
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Full Diagnosis
Improper combination between inverter and fan driver
All Recorded Causes
Mis-matching of type of PCB Improper (or no) field setting after replacing outdoor unit main PCB
Verify Before Replacing Parts
- Confirm the exact Daikin model family and vrv context before acting on a generic code description.
- Confirm board LEDs, wiring polarity, and model compatibility before replacing control boards — this Daikin fault points at mis-matching of type of PCB.
- Check for intermittent communication faults caused by connectors, moisture, or damaged harnesses, and rule out improper (or no) field setting after replacing outdoor unit main PCB.
- After the correction, run the system long enough to confirm the vrv fault does not return under normal load.
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