What It Means
Power voltage imbalance or inverter PCB.
Daikin Packaged Unit
Daikin Packaged Unit Error Code P1
Troubleshooting guide for the Daikin Packaged Unit system fault P1.
Possible Causes
- Open phase.
- Interphase voltage imbalance.
- Defective capacitor in the main circuit.
- Defective wiring in the main circuit.
- Defective inverter 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
Power voltage imbalance or inverter PCB
All Recorded Causes
Open phase Interphase voltage imbalance Defective capacitor in the main circuit Defective wiring in the main circuit Defective inverter PCB
Verify Before Replacing Parts
- Confirm the exact Daikin model family and packaged 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 open phase.
- Check for intermittent communication faults caused by connectors, moisture, or damaged harnesses, and rule out interphase voltage imbalance.
- After the correction, run the system long enough to confirm the packaged fault does not return under normal load.
Still unsure about this fault?
ACLogics walks you through Daikin Packaged Unit diagnostics step-by-step — so you confirm the cause before swapping parts.
