Daikin Air Conditioner Error J2

⚡ Quick Answer: The Daikin Air Conditioner error J2 signifies a communication failure between the indoor and outdoor units, primarily due to a malfunction in the comp... ✅ DIY Fixable

What Does Error J2 Mean?

The Daikin Air Conditioner error J2 signifies a communication failure between the indoor and outdoor units, primarily due to a malfunction in the compressor current sensor. This error results in the unit ceasing operation, accompanied by a flashing display. If the J2 code appears, it typically indicates that the unit has shut down, halting both cooling and heating functions.

Common Symptoms:

  • Unit stops operation with J2 displayed
  • Cooling/heating performance ceases due to outdoor unit shutdown
  • Error appears on remote or control interface

Possible Causes

  • Compressor current sensor failure or abnormal reading (medium)
  • Failure or disconnection in compressor-related components (coil, electromagnetic contactor) (medium)
  • Control/PCB related fault affecting current detection (medium)

How to Fix Error J2

DIY Fix Restart and basic checks

  1. Turn off the air conditioner from the main power switch.
  2. Wait 5–10 minutes for internal capacitors to discharge.
  3. Turn the unit back on to see if the error clears.

Technician Only Diagnose and repair current sensor / compressor circuit

  1. Verify the J2 fault code with service diagnostic tools.
  2. Inspect compressor current sensor wiring harness and connections.
  3. Test the current sensor output and replace if faulty.
  4. Check compressor coil continuity and repair/replace if open.
  5. Inspect and test the compressor electromagnetic contactor.
  6. Check outdoor unit control PCB for faults affecting current sensing.

Parts needed: Compressor current sensor, Compressor coil, Electromagnetic contactor, Control PCB

🛑 When to Call a Pro:
  • If J2 persists after a basic reset
  • If error returns immediately on restart
  • If unit behaves abnormally (no cooling/heating)

Technical Specifications

wattage
component Communication Cable
resistance
part_number
voltage_rating 220V AC

Common Questions

What does J2 error mean on Daikin Air Conditioner?

J2 error indicates a communication failure between indoor and outdoor units due to a compressor current sensor malfunction.

Can I fix Daikin Air Conditioner J2 error myself?

Yes, you can try restarting the unit and performing basic checks. Turn it off, wait 5–10 minutes, and turn it back on.

How much does it cost to fix J2 error?

Repair costs vary from $200 to $800+, depending on the model and required parts.

When should I call a technician for J2?

Call a technician if the J2 error persists after a reset, returns immediately, or if the unit behaves abnormally.

Sources & References

Data last verified: 2026-07-07

User Comments (0)

Share your experience or solution below.

Be the first to comment!