Sanyo Air-Conditioning Error e04

What does this fault mean that affects Sanyo air conditioners?

Aha! This is a fault with your Sanyo air conditioner that has you hot and sweating in your home and office. But today we are here to help you fix this problem and tell you that you don't have much to worry about. Let's get to know this problem!

The error code E04 fault in Sanyo brand air conditioners indicates that there is a communication problem between the indoor unit and the outdoor unit. A fault that, without a doubt, can be frustrating and somewhat complicated to fix. However, it is a fault that can be repaired, and you don't have to get rid of your air conditioner.

To fix this fault, the first thing we need to know are the possible causes that lead to this fault:

• A communication fault between the indoor and outdoor units: This cause may be due to damaged or defective wiring, loose, dirty, or corroded connections, or one of the PCB electronic boards being damaged.
• An electrical interference in one of the units, either indoor or outdoor: Electrical noise in the supply, voltage spikes, or electrical surges.
• Problems with the power supply: A fault in the power supply of the indoor or outdoor unit can cause this fault to appear in your Sanyo air conditioner.
• Problems with one of the PCB electronic boards: The PCB electronic board is the "brain" of your air conditioner. If this component fails, then the functions of your air conditioner will not work correctly.

These are the possible causes that make this fault appear in your air conditioner. But let's now see how we could solve this problem so you can say a definitive goodbye to the heat.

How can I solve the E04 error code of the Sanyo air conditioner?

We have a list of possible solutions prepared for you to find a solution to this fault. Follow all the steps and do not skip any, pay special attention and care to the details:

1. Turn off and unplug the air conditioner to reset its sensors: We can start with an easy and simple procedure, which is to reset the air conditioner to reset the sensors. To do this, you need to turn off the air conditioner and unplug it from the power source for a few minutes. Once the time has passed (15 minutes), plug the air conditioner back in and turn it on to see if the fault has disappeared from the screen. If the problem persists, then we will need to check other things that we will leave for you below.
2. Use a good voltage regulator or surge protector in your air conditioner's installation: It may be that an electrical interference, an overload, or a short circuit is affecting your air conditioner's operation. The PCB electronic boards can be sensitive to these situations, despite having fuses to protect them. That is why we recommend that you have a good voltage regulator and/or surge protector installed in your air conditioner to avoid or at least minimize voltage problems.
3. Check the electrical wiring connecting the indoor and outdoor units of your air conditioner: This wiring must be in good condition so that both units can communicate correctly. Visually inspect that all the wiring is not damaged or defective and that it is not excessively long either. If the wiring connecting the indoor and outdoor units is very long, then we recommend cutting it down to the necessary length for the two units to be connected. If you find any damaged cables, you will need to replace them and make the necessary repairs.
4. Check the wiring connections in the indoor and outdoor units of your air conditioner: Connections can become corroded with the air conditioner's humidity. These connections should be in good condition, but if not, then preventive maintenance with an electronic cleaner, a small and soft sandpaper, or a specific product to remove corrosion is required. Check and ensure that all connections are tight and free from dirt or dust that could affect the contact.
5. Check the power sources and transformers of each unit, both indoor and outdoor: If the problem persists, it is likely that the power sources of the units have burned out due to an electrical problem. You will need to use a multimeter and check that the power sources are working correctly. If you find that they are not working as they should, you will need to find a replacement and change them. Once replaced, check if the problem persists in your air conditioner. If the fault continues, we will need to check the PCB electronic boards thoroughly.
6. Check the PCB electronic boards of your Sanyo air conditioner: A procedure that may be somewhat complicated for you, especially if you do not have knowledge in electronics. But if you have the appropriate knowledge for this task, it may be very easy for you. Check the continuity of the electronic components on the PCB electronic boards of the air conditioner with a multimeter, both of the indoor unit and the outdoor unit. If you notice that a component is failing, you will need to do a soldering job to remove and replace it with a new and compatible one. Sometimes it can be easier to replace the entire electronic board. If you feel you cannot do this procedure yourself, it would be best to seek technical support for help.
7. If the problem persists, it's time to review all the steps mentioned: Sometimes, a brief review can be the solution to the problem, as you may have missed a detail. A poorly connected cable, a corroded connection, an unstable electrical network can make the difference between a fully functional air conditioner and one that is not. If the previous solutions do not work, it is possible that there is a serious problem with one of the PCB electronic boards of one of the two units that make up your Sanyo air conditioner. In that case, you would need to do a thorough review and have extensive knowledge in electronics, as well as the appropriate tools for this review.
8. Call Sanyo technical support and request a home visit for a more thorough inspection: If the problem has become too complicated for you to solve, then a qualified Sanyo technician can accurately diagnose the problem and help you solve it efficiently. We encourage you to call Sanyo technical support or a trusted one, we are sure they will provide a quick and effective solution to this problem. Technical support can have the tools, parts, and knowledge needed to solve any problem your air conditioner may have.

In conclusion, the E04 error code is a warning that Sanyo air conditioners have to indicate that there is a communication problem between the air conditioner units. That is, connection failures between the indoor split unit and the outdoor unit where the compressor is located. The causes can be very varied, but they range from very long wiring, wiring failures, voltage problems in your home or office, power supply problems, or faults in the electronic boards of either of the two units. To fix this fault, you can follow the steps we have indicated above.

That's all for today! A fault that can be somewhat complicated to fix if you do not have the knowledge or the necessary tools, but you can always rely on technical support to help you with this task. Good luck and see you next time!