CodeRegistry
Brands
  1. Home
  2. Daikin
  3. Simple Self Diagnosis by Malfunction Code | Daikin
  4. J4
About·Privacy·Terms

CodeRegistry — Your global library for technical solutions.

For your safety: always follow the equipment manufacturer’s official manuals. CodeRegistry is an independent help site and is not affiliated with the brands listed here.

J4

J4 - Malfunction of current sensor of compressor (Outdoor Unit)

Daikin · Simple Self Diagnosis by Malfunction Code | Daikin

What does J4 mean?

The sensor monitoring the compressor's current draw has detected an issue.

Common Causes

  • Faulty current sensor
  • Wiring problems
  • Compressor electrical fault

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Turn off power to the unit.

  2. 2

    Wait for one minute and restore power.

  3. 3

    If the error code persists, contact a professional for diagnosis.

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
Open Manual (Page 1)Search more codes in this manual