Mitsubishi Air Conditioner Error E5

⚡ Quick Answer: The Mitsubishi Air Conditioner E5 error code indicates a communication failure between the indoor and outdoor units, disrupting the system's ability t... ✅ DIY Fixable

What Does Error E5 Mean?

The Mitsubishi Air Conditioner E5 error code indicates a communication failure between the indoor and outdoor units, disrupting the system's ability to operate effectively. Symptoms include the E5 code displayed on the unit or remote, unresponsiveness to remote commands, and intermittent or no cooling. This error typically arises from abnormalities in communication transmission between the remote controller and the unit components, requiring attention to ensure proper functionality.

Common Symptoms:

  • E5 code displayed on unit or remote
  • Air conditioner unresponsive to remote commands
  • Intermittent or no cooling operation

Possible Causes

  • Remote controller communication/transmission abnormality (high)
  • Indoor–outdoor unit communication failure (medium)

How to Fix Error E5

DIY Fix Basic Communication Checks

  1. Turn off power to the air conditioner at the main switch or breaker.
  2. Wait 30–60 seconds and restore power to see if the code clears.
  3. Ensure the remote controller has functioning batteries and is within range.
  4. Check that the unit responds to other remote inputs (e.g., power, mode change).

Technician Only Inspect and Repair Communication Wiring/Components

  1. Inspect communication wiring between the indoor unit and outdoor unit for loose, damaged, or corroded connections.
  2. Verify correct wiring gauge and termination per Mitsubishi specifications.
  3. Test communication boards in indoor and outdoor units for fault indications.
  4. Replace defective communication boards or wiring harnesses as needed.

Parts needed: Communication wiring harness, Indoor unit communication board, Outdoor unit communication board

🛑 When to Call a Pro:
  • If error persists after basic user-level actions
  • If wiring appears damaged or inaccessible
  • If multiple communication codes appear or system does not respond to remote/function commands

Technical Specifications

wattage 1500W
component Control Board
resistance 5-10 ohms
part_number Mitsubishi 5D-1000-001
voltage_rating 230V AC

Common Questions

What does E5 error mean on Mitsubishi Air Conditioner?

The E5 error means there's a communication failure between the indoor and outdoor units, indicated by the E5 code on the display.

Can I fix Mitsubishi Air Conditioner E5 error myself?

Yes, you can try basic communication checks like resetting power and ensuring the remote batteries are functional.

How much does it cost to fix E5 error?

Repair costs for the E5 error can range from ¥10,000 to ¥50,000+, depending on the parts and labor required.

When should I call a technician for E5?

Call a technician if the error persists after basic fixes, if wiring is damaged, or if multiple errors occur.

Sources & References

Data last verified: 2026-07-01

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