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L4

L4 - Inverter instantaneous overcurrent (AC output) (Outdoor Unit)

Daikin · Simple Self Diagnosis by Malfunction Code | Daikin

What does L4 mean?

The inverter has detected a sudden surge of current on its AC output, suggesting a potential short circuit or component failure.

Common Causes

  • Inverter board fault
  • Short circuit in the AC circuit
  • Power supply issue

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Turn off the power to the unit at the breaker.

  2. 2

    Wait for 60 seconds and then restore power.

  3. 3

    If the error code persists, professional service is needed.

Browse all codes in this manual (60)
Verified technical data. Last updated: April 2026

Related Faults

6-06-0 - External protection device activated (Heat reclaim ventilator)6-16-1 - Malfunction of PCB (Heat reclaim ventilator)6-26-2 - Ozone density abnormal (Heat reclaim ventilator)
Source: Simple Self Diagnosis by Malfunction Code | Daikin
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