How to Check Mitsubishi Inverter Error Code: A Comprehensive Guide

Troubleshooting Mitsubishi inverter air conditioners can be a daunting task, but understanding how to check the error codes is the first step in resolving any issues. This comprehensive guide will walk you through the process of identifying, displaying, and interpreting Mitsubishi inverter error codes, equipping you with the knowledge to diagnose and address problems effectively.

Identifying the Error Code

The first step in checking the Mitsubishi inverter error code is to locate the upper or left operation indicator lamp on the indoor unit. If this lamp is flashing, it indicates that an error has occurred. To identify the specific error code, count the number of times the lamp flashes between the delay periods.

Each error code is represented by a unique number of flashes, allowing you to pinpoint the issue. For example, if the lamp flashes three times, followed by a delay, and then repeats this pattern, the error code is likely “03.”

Displaying the Error Code

how to check Mitsubishi inverter error codeImage source: Mitsubishi ac By Solomon203

Once you have identified the flashing pattern, the next step is to display the error code on the handheld remote controller. To do this, follow these steps:

  1. Ensure that the handheld remote controller is powered off.
  2. Position yourself within 2 meters (6.5 feet) of the indoor unit, pointing the remote controller at the receiving section.
  3. Using a fine-tipped object, press and hold the small “CHECK” button on the remote controller.
  4. While holding the “CHECK” button, continue pointing the remote controller at the receiving section of the indoor unit until you hear a beep and the error code appears on the display.

This process allows you to access the error code information directly from the remote controller, providing a clear and concise way to identify the problem.

Interpreting the Error Code

With the error code displayed on the remote controller, you can now refer to the Mitsubishi error code table to determine the specific issue. Each error code corresponds to a particular problem, such as a sensor failure, compressor malfunction, or communication error.

If the display shows “00,” it indicates that there is no error. However, if any other error code appears, it means that the air conditioner requires inspection and repair. In such cases, it is crucial to stop using the air conditioner, turn off the breaker, and contact your dealer or a certified Mitsubishi technician for further assistance.

Advanced Troubleshooting Resources

For users who want to delve deeper into Mitsubishi inverter troubleshooting, there are several additional resources available:

YouTube Video

The YouTube video “Mitsubishi M-Series Failure Mode Recall” demonstrates the steps to enter the Failure Mode Recall using the handheld remote controller for M-Series air conditioners. This video can provide a visual guide to the process of displaying the error code.

Mitsubishi Electric Malaysia Troubleshooting Guide

The Mitsubishi Electric Malaysia Troubleshooting Guide offers detailed instructions for troubleshooting wall-mounted air conditioners. It includes information on identifying issues based on the flashing light on the upper/left operation indicator lamp and the indoor unit failure mode table.

Mitsubishi Electric Error Code Lookup

The Mitsubishi Electric Error Code Lookup page allows you to enter the error or fault code on your device, which can help you resolve the issue by providing specific troubleshooting steps and solutions.

Remember, if your air conditioner is diagnosed with a major issue, it is always best to contact your dealer, technician, or a certified Mitsubishi servicing professional. They have the expertise and specialized knowledge to accurately diagnose and effectively resolve the problem.


Checking Mitsubishi inverter error codes is a crucial step in troubleshooting and maintaining your air conditioning system. By following the steps outlined in this guide, you can identify, display, and interpret the error codes, empowering you to take the necessary actions to address any issues. Whether you’re a DIY enthusiast or a professional technician, this comprehensive guide will equip you with the knowledge and resources to effectively diagnose and resolve Mitsubishi inverter-related problems.

Mitsubishi M-Series Failure Mode Recall (YouTube Video)
Mitsubishi Electric Malaysia Troubleshooting Guide
Mitsubishi Electric Error Code Lookup