ErrorCodeDoctor
Daikin · Air Conditioner

Daikin Air Conditioner P1 error code

Difficulty: Hard · Cost: $80–$500 · Duration: Requires professional service

The P1 error means your Daikin air conditioner detected a power voltage imbalance or a fault with the inverter PCB. This can be caused by an open phase in the power supply, interphase voltage imbalance, a defective capacitor in the main circuit, defective wiring, or a defective inverter PCB. Contact a qualified technician or a licensed electrician.

Common causes

  • Open phase in the power supply
  • Interphase voltage imbalance
  • Defective capacitor in the main circuit
  • Defective wiring in the main circuit
  • Defective inverter PCB

How to fix it

  1. 1

    Check the circuit breaker and power supply to the outdoor unit

  2. 2

    Contact a licensed electrician if the power supply is suspect

  3. 3

    Contact a qualified technician to inspect the inverter PCB and main circuit components

Related Daikin Air Conditioner error codes

1

A0

An external protection device connected to the indoor unit has been activated

hard
2

A1

A fault was detected in the indoor unit PCB (control board)

hard
3

A3

The drain level control system has detected an abnormality — drain may be clogged

medium
4

A5

Freeze-up protection (cooling) or high pressure control (heating) has activated — check the air filter

easy

P1 error — frequently asked questions

What does the P1 error mean on a Daikin air conditioner?

A power voltage imbalance or inverter PCB fault was detected

What causes the P1 error?

The P1 error is usually caused by: Open phase in the power supply; Interphase voltage imbalance; Defective capacitor in the main circuit; Defective wiring in the main circuit; Defective inverter PCB.

Can I fix the P1 error myself?

This is rated a hard fix — it often requires tools, parts, or experience, and may be safer left to a professional technician.

How much does it cost to fix the P1 error?

Fixing the P1 error on a Daikin air conditioner typically costs $80–$500, depending on parts and whether you do it yourself or hire a technician.

Is it safe to keep using my air conditioner with the P1 error?

We'd recommend addressing the P1 error before continuing to use the air conditioner, since hard-rated issues often involve a real fault rather than a minor glitch.