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L9

L9 - Malfunction of inverter compressor startup error (Stall prevention) (Outdoor Unit)

Daikin · Simple Self Diagnosis by Malfunction Code | Daikin

What does L9 mean?

The inverter compressor failed to start correctly, and the system's stall prevention feature activated.

Common Causes

  • Compressor internal issue
  • Electrical connection problem
  • Low refrigerant

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Turn off the unit's power supply.

  2. 2

    Wait one minute, then restore power.

  3. 3

    If the error code persists, professional diagnosis of the compressor and related systems is necessary.

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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