Sanyo Air-Conditionning Error p29

What does this malfunction mean in the Sanyo air conditioner?

Air conditioners are our allies when summer season approaches and the hottest days of the year come, but from time to time, screen errors appear that we cannot understand and that can be somewhat complicated to resolve.

This malfunction where your air conditioner shows a p29 error on the screen can certainly give you a headache, but today we are going to help you solve this problem.

The p29 error in Sanyo air conditioners tells us that the compressor in the outdoor unit has failed to start. Generally, this fault refers mainly to issues in the components of the electronic board of the outdoor unit, but it can also have other different causes that we will see today.

These are the causes of this fault in your Sanyo air conditioner, which prevent the outdoor unit from functioning properly:

• A blockage in the compressor of the outdoor unit: The compressor may be blocked due to a lot of dirt or lack of maintenance. We recommend performing preventive maintenance on your air conditioner, especially the outdoor unit.
• Defective internal wiring, damaged or disconnected: The cables connecting the indoor and outdoor units may be damaged or poorly connected. You will need to check all the wiring that connects the units to ensure there is a good connection between the devices.
• Blown fuses on the electronic board of the outdoor unit: The fuses in the outdoor unit may have blown due to electrical overloads or problems in the power supply network. In that case, you will have to inspect them thoroughly and replace those that are necessary.
• Issues in the electronic board of the outdoor unit: The electronic boards control communication, operations, and voltage between the indoor and outdoor units. If any of them are defective, especially the one in the outdoor unit, it could generate the p29 malfunction.

Now that you know all the causes that lead to this problem, it’s time to see how we could find a solution.

How can the p29 error code in the Sanyo air conditioner be resolved?

We have a list of possible solutions for you that you can apply yourself to try to fix this issue with your Sanyo air conditioner. If you have knowledge in electronics, some of these procedures might seem easy to perform:

1. To fix temporary errors in your Sanyo air conditioner, it is recommended to perform a system reset: This process involves turning off the unit using the remote control, followed by unplugging it from the electrical outlet for a short period of time. After a few minutes have passed (at least 15), reconnect and turn on the air conditioner to see if the issue has been resolved. This method requires only about 15 minutes of your time and could be the solution you need. If the problem has not been resolved with this procedure, then we suggest following the additional steps we will provide below.
2. Ensure that the voltage is appropriate for your air conditioner to function: Remember that most air conditioners operate with a voltage of 220V from the power outlet. You need to ensure that the unit is indeed receiving this 220V to operate optimally; otherwise, the outdoor unit will not start correctly and will display an error code on the screen. Sometimes, due to some maintenance in your area, one phase of the current drops, and the air conditioner only gets half the voltage needed to operate. It could also be that there is a problem with the electrical circuit in your home or office, so make sure that all the switches on the electrical panel are activated and working.
3. To prevent problems and ensure the air conditioner’s proper functioning, it is necessary to carry out preventive maintenance: Start by locating and cleaning the air filters with water and a mild detergent. You can use a bristle brush to help with this task, as long as it has soft bristles. It is important to remove any accumulated dirt and dust from the filters, as well as from the heat exchangers and the condenser connected to the compressor. You can also use a compressed air gun to remove all the dust in hard-to-reach places. If you notice that the filters are very deteriorated, do not hesitate to find a replacement for them. Also, check that the drain hose is free of obstructions to avoid water leaks in the indoor unit. This preventive maintenance ensures that the units dissipate heat adequately and maintain efficient ventilation.
4. Regarding the electrical system, it is important to check the wiring and connections to detect potential faults and/or corrosion: If you find sulfate accumulation during maintenance, remove it completely with an electronic cleaner or a specific product for removing it. Check that the cables, especially those linking the internal and external units, are in good condition. Once you have ensured that all connections are clean and everything is in good condition, reconnect everything to the air conditioner and check if the error has disappeared. If the problem persists, then we will need to check the fuses and the electronic board of the outdoor unit.
5. Use a multimeter and check the fuses of your Sanyo air conditioner: It often happens that fuses with a short circuit or a power surge blow out, burn, and become useless. In that case, you will need to check them with a multimeter and ensure that they are in good working condition. Remember that if these fuses are already burned out, they will not allow current to pass through to the outdoor unit, making it impossible for the compressor to start. If you notice that they are not working well or are showing incorrect values, then you will need to replace them with new ones that are compatible.
6. Check and perform preventive maintenance on the PCB electronic board with the help of a multimeter: A fault in the electronic board of the outdoor unit could be the cause of this issue, so it is important to check it carefully and ensure that all its components are working correctly. Start with a visual inspection for corrosion and sulfate, disconnections, or damaged components. Use the multimeter to check the integrity of the tracks and the continuity of resistors and capacitors, ensuring that they match the manufacturer’s specifications in ohms. If you find any defective components, proceed to replace them with ones of equal resistance and impedance value.
7. If the error persists, review all the procedures we have described in this guide: It might be a bit annoying to have to repeat everything, but it is important to review each step you have taken to confirm that no important detail has been missed. If you cannot find the cause of the problem, then it is very likely that the PCB electronic board is irreparably damaged, and you will need to replace it with a new one that is compatible with your compressor and air conditioner model. If you do not feel confident performing these tasks, the best option would be to contact a specialized technician.
8. Request professional technical assistance from Sanyo by making a phone call: If the issue is not resolved after all your efforts, do not hesitate to call Sanyo technical support to schedule a home visit. The Sanyo team has the experience and the right tools to diagnose and repair any fault in your air conditioning system. You could also call a technician you trust to check it out; however, keep in mind that you might lose your air conditioner’s warranty if you still have it. After the technical intervention and the installation of the necessary parts, you will receive a warranty that ensures the quality of the service provided.

In summary, the p29 error code in Sanyo air conditioners is a problem with the startup and ignition of the compressor or inverter in the outdoor unit. The most common causes are a communication failure between units, due to: internal wiring faults, voltage issues in the power supply, a fault in the PCB electronic board, or a blown fuse. You can solve the problem by following the steps we have outlined in this guide we have prepared for you.

Remember that if you feel that the problem is complicated to solve, you can always call Sanyo technical support for a more thorough and complete review. This issue can be resolved despite how complicated it may seem, so don’t get discouraged and don’t let the heat defeat you this summer season. Good luck!