How to Clear Fujitsu Fault Codes: A Comprehensive DIY Guide

Clearing Fujitsu fault codes can be a daunting task, but with the right knowledge and approach, it can be a straightforward process. This comprehensive guide will walk you through the step-by-step instructions to identify, diagnose, and resolve Fujitsu fault codes, ensuring your HVAC system operates at its optimal performance.

Identifying Fujitsu Fault Codes

Fujitsu fault codes are displayed on the remote controller of your air conditioning unit. These codes typically start with the letter “E” followed by a period and a sub-code, such as “E.0A.” Understanding the meaning of these codes is the first step in resolving the issue.

To identify the fault code, follow these steps:

  1. Locate the remote controller for your Fujitsu air conditioning unit.
  2. Observe the display on the remote controller. If a fault code is present, it will be displayed in the format “E.XX,” where “XX” represents the sub-code.
  3. Make a note of the specific fault code displayed, as this will be crucial in determining the underlying problem.

Performing a Hard Reset

how to clear Fujitsu fault codesImage source: Fujitsu AC by Raysonho

If the remote controller displays the error code “E:EE,” you will need to perform a hard reset. This process involves the following steps:

  1. Ensure the air conditioning unit is turned off.
  2. Press and hold the “Temp Up” and “Temp Down” buttons on the remote controller simultaneously for 3 seconds.
  3. The unit should now be in a hard reset state.
  4. To return the unit to normal operation, press the “Temp Up” and “Temp Down” buttons together for another 3 seconds.

Checking for High Voltage

When working on any HVAC system, it’s crucial to be cautious of high voltage components. Before attempting to access any internal components, ensure that the power to the unit is turned off and the circuit breaker is in the “off” position.

When removing access covers, be mindful of the following:

  1. Wear appropriate personal protective equipment (PPE), such as insulated gloves and safety glasses, to protect yourself from potential electrical hazards.
  2. Avoid touching any exposed wiring or terminals, as they may be carrying high voltage.
  3. If you are unsure about the presence of high voltage, consult a professional HVAC technician for assistance.

Resetting the Unit

If the fault code persists after performing a hard reset, you can try resetting the entire unit by turning off the circuit breaker. Follow these steps:

  1. Locate the circuit breaker that supplies power to the Fujitsu air conditioning unit.
  2. Turn the circuit breaker to the “off” position and wait for at least 10 minutes.
  3. After 10 minutes, turn the circuit breaker back to the “on” position.
  4. Attempt to power on the unit and check if the fault code has been cleared.

Clearing Fault Codes for Fujitsu Inverter Air Conditioners

For Fujitsu inverter air conditioning units, the process for clearing fault codes is slightly different. Follow these steps:

  1. Turn off the unit at the circuit breaker.
  2. Wait for 10 minutes to allow the unit to fully power down.
  3. Turn the circuit breaker back on and try powering the unit again.

Clearing Fault Codes for Fujitsu Halcyon Outdoor Fan Errors

Fujitsu Halcyon outdoor units may also display error codes related to the outdoor fan. To clear these fault codes, follow these steps:

  1. Locate the circuit breaker that supplies power to the Fujitsu Halcyon outdoor unit.
  2. Flip the circuit breaker to the “off” position to completely remove power from the unit.
  3. Wait for 30 to 60 seconds to ensure the unit is fully powered down.
  4. Flip the circuit breaker back to the “on” position to restore power to the unit.

Seeking Professional Assistance

If the steps outlined above do not resolve the issue, it’s recommended to consult the user manual for your specific Fujitsu model or contact Fujitsu’s customer support for further assistance. In some cases, the fault code may indicate a more complex issue that requires the expertise of a professional HVAC technician.

When contacting Fujitsu’s customer support or a technician, be prepared to provide the following information:

  1. The specific fault code displayed on the remote controller.
  2. A detailed description of the issue you are experiencing with the Fujitsu air conditioning unit.
  3. The model number and serial number of your Fujitsu HVAC system.

By following this comprehensive guide, you’ll be well on your way to successfully clearing Fujitsu fault codes and maintaining the optimal performance of your air conditioning system.