Daikin Mini Split Error Code P1: How to Fix It

Q: What does error code P1 on a Daikin mini split mean?

Error code P1 indicates a power supply phase reverse, meaning the incoming electrical phase order is incorrect. This typically occurs in three-phase installations and prevents the compressor from starting.

Q: Can I fix Daikin error code P1 myself?

If you are comfortable working with high voltage and have a multimeter, you can check the wiring and phase sequence. However, if the issue is at the main panel or involves the control board, it's safer to call a professional.

Q: How do I reset error P1 on a Daikin mini split?

Turn off the system at the breaker for 30 seconds, then turn it back on. Alternatively, press and hold the reset button on the indoor unit (if available). The error should clear if the phase issue is resolved.

Q: Is error code P1 dangerous?

While the error itself is a safety feature, the underlying electrical issue can cause compressor damage or overheating. It should be addressed promptly to avoid injury or equipment failure.

Q: How much does it cost to fix Daikin error code P1?

If it's a simple wiring fix, it may cost nothing if you DIY, or $100-$200 for an electrician. If a control board or compressor needs replacement, expect $500-$1500 plus labor.

Abstract

Your Daikin mini split is showing error code P1, which means the power supply phase sequence is reversed. This occurs when the incoming electrical phase order (L1, L2, L3 for three-phase units) is incorrect, preventing the compressor from starting. For single-phase units, a phase reverse error may indicate a miswired power line or a faulty control board.