Daikin Mini Split Troubleshooting Guide – Let’s Fix It

Daikin mini split systems can save you money and help you reduce your carbon footprint. However, they can also be frustrating due to their complexity and the fact that they are not often robust. Here are some tips to help you troubleshoot common Daikin mini split issues on your own.

In this post, we’re going to discuss some of the most common Daikin mini split troubleshooting issues that we come across as well as offer some tips for getting your system up and running again.

Daikin mini split systems are incredible. They’re a great way to cool your home, but sometimes there can be issues with them. For example, if you notice that the air coming out of your system doesn’t feel as cold as it used to, there’s something wrong with the cooling part of the system.

Daikin Mini Split Troubleshooting Guide

The mini split system consists of an indoor unit and an outdoor unit. The outdoor unit is made up of a compressor, condenser and expansion valve (capillary). The indoor unit consists of an evaporator and an air handler.

Daikin Mini Split Troubleshooting Guide

If there is a problem with the mini split system, first check the outdoor unit. If the outdoor unit is not running, check the following:

Daikin Mini Split Not Blowing Cold Air

There are many reasons why Daikin mini split does not blow cold air. The reasons can be both minor and major, and the list below will touch on some of the most common reasons why this happens.

Leaking or Low Refrigerant

A mini split that is not blowing cold air can be caused by a leaking or low refrigerant level. The refrigerant is what helps to keep the air cool, so if it is leaking, it will not be able to do its job properly.

If the level is low, it will also not be able to cool the air properly. Either of these problems can be fixed by a professional, so it is important to call one if you think your mini split is not blowing cold air for either of these reasons.

The Filter Is Dirty or Clogged

If your Daikin mini split is not blowing cold air, one possible reason is that the filter is dirty or clogged. When the filter is dirty or clogged, it can block the flow of air and prevent the mini split from cooling properly.

To clean or replace the filter, follow the instructions in your owner’s manual.

Problem With the Evaporator Coil or Condenser

The evaporator and condenser coils are the two main components of a mini split AC system. If either of these coils is not working properly, it can cause the system to not blow cold air.

There are a few things that can go wrong with the evaporator coil. One issue is that it can become frozen. This can happen if the air around the coil is not moving enough. Another issue is that the coil can become clogged with dirt and dust.

The condenser coil can also have issues. One problem is that it can become corroded. This can happen if the coil is not cleaned on a regular basis. Another problem is that the coil can become damaged. This can happen if the coil is hit by a piece of debris.

Blocked or Clogged Registers

If your Daikin mini split is not blowing cold air, it may be due to one or more of the registers being blocked or clogged. Inspect all of the registers in your home and make sure that they are clear of any debris.

If you find any blockages, remove them and see if that fixes the problem. If not, you may need to call a professional to clean your ductwork.

Thermostat Issue

If your Daikin mini split is not blowing cold air, it may be because the thermostat is set too high. Try resetting the thermostat to a lower temperature to see if that fixes the problem.

The problem could be with the thermostat. Try replacing the batteries and see if that fixes the issue. If not, then you might need to replace the thermostat.

Daikin Mini Split Not Heating

If your Daikin mini split AC is not heating, here are some reasons why it is happening:

1. There is no electricity or power connection – is the circuit breaker turned on? Is there a power outage in your area? Check the power outlet to make sure there is no loose connection.

2. Thermostat setting is not correct – check the thermostat setting and make sure it is set to “heat” mode.

3. Unit is not receiving enough air – clean the air filter and make sure there are no obstructions blocking the air intake or exhaust vents.

4. Refrigerant level is low – a low refrigerant level will prevent the unit from heating properly. Contact a qualified technician to recharge the system.

5. Compressor is not working – the compressor is responsible for circulating the refrigerant. If it is not working, the unit will not be able to heat properly. 

6. Furnance Is Turned Off – If the furnace is turned off, the mini split will not be able to heat the home. Make sure the furnace is turned on and set to the correct temperature.

Daikin Mini Split Won’t Turn ON

If your Daikin mini split system is not turning on, there are several things that may be causing the problem. First, check to see if the power is on. If the power is off, turn it on and see if the system turns on.

If the power is on and the system still won’t turn on, there may be a problem with the thermostat.

Tripped Circuit Breaker

If the circuit breaker or fuse has been tripped, the Mini Split will not turn on. The circuit breaker or fuse needs to be reset.

If the circuit breaker or fuse continues to trip, there may be a problem with the wiring. Contact a qualified electrician to check the wiring.

Blown Fuse

A blown fuse is one possible reason why a Daikin mini split system may not turn on. In this case, you will need to replace the fuse in order to get the system up and running again.

Clogged Air Filter

If your Daikin mini split won’t turn on, it may be due to a clogged air filter. To clean the air filter, turn off the power to the unit and remove the filter. Clean the filter with warm, soapy water and rinse it thoroughly. Allow the filter to dry completely before replacing it.

Dirty Evaporator Coils

The evaporator coils are the large metal coils that are located inside the mini split’s indoor unit. These coils are responsible for absorbing heat from the air that is circulated through the unit.

Over time, these coils can become dirty and clogged with dust, dirt, and pollen. This can cause the coils to lose their ability to absorb heat, which can cause the mini split to stop working.

If your mini split won’t turn on, the first thing you should do is check the evaporator coils. If they are dirty, you can clean them with a vacuum cleaner or a coil cleaning solution. Once the coils are clean, the mini split should start working again.

Dirty Condenser Lines

If your Daikin mini split won’t turn on, it may be because the condenser lines are dirty. When the condenser lines are dirty, the mini split won’t be able to turn on properly.

To clean the condenser lines, disconnect the power to the mini split and remove the condenser lines from the unit. Clean the condenser lines with a brush and some soapy water. Rinse the lines well and reconnect them to the mini split. Turn on the power to the mini split and see if it will turn on.

Refrigerant Leakage

If the Mini Split is not turning ON, it may be due to a refrigerant leak. Try checking all of the connections to make sure they are tight and there are no leaks. If there is a leak, you will need to repair it before the Mini Split will work properly.

Thermostat Problem

If your Daikin mini split won’t turn on, it may be due to a problem with the thermostat. Try these troubleshooting tips:

  1. Check the batteries in the thermostat. If they are dead, replace them and see if the unit will turn on.
  2. Check that the thermostat is set to the correct mode. For example, if you want the unit to cool the room, the thermostat should be set to the “cool” mode.
  3. Check that the thermostat is set to the correct temperature. If it is set too low, the unit will not turn on.
  4. If none of these troubleshooting tips work, you may need to replace the thermostat.

Daikin Mini Split Leaking Water

Water leaks or any kind of fluid spillage from your mini split air conditioner are a sign that your system is damaged in some way or another.

So, if you have noticed water leaking from your mini split, then you must try to determine the reason behind it so that you can take the necessary actions on time to prevent any further damage to your system.

Improper Installation

Installing a Daikin mini split system correctly is critical to preventing water leaks. If the system is not installed correctly, it can cause water to leak from the unit. There are several things that need to be done when installing a daikin mini split system to prevent water leaks:

The first thing that needs to be done is to make sure that the area where the unit will be installed is level. If the area is not level, it can cause the unit to tilt and allow water to leak out.

The next thing that needs to be done is to check the drainage. The unit needs to be installed on an area where the water can drain away from the unit. If the water cannot drain away, it will cause the unit to flood and allow water to leak out.

The last thing that needs to be done is to check the sealing. The unit needs to be sealed properly to prevent water from leaking out.

Clogged drain pipe

Leaking drain pipe is the most common cause of water leakage from a mini split. The drain pipe is responsible for carrying away the condensate water produced by the mini split. If the drain pipe becomes clogged, the water will back up and leak out of the unit.

To fix a leaking drain pipe, first turn off the power to the unit. Next, remove the drain pan and clean out any debris that may be clogging the pipe. Finally, reconnect the drain pipe and turn the power back on.

Dirt in the air filter

If the air filter is dirty, it can block the airflow and cause the unit to overheat. This can lead to water leakage. Make sure to clean the air filter regularly to prevent this issue.

Low refrigerant

If your Daikin mini split is leaking water, it is likely due to low refrigerant. The refrigerant is what helps keep the water inside the unit cold, so when it is low, the water will leak out. You can check the level of refrigerant by looking at the gauge on the outside of the unit. If it is low, you will need to add more.

Damaged drain pan

Damaged drain pan can lead to water leaking from the unit. This can be caused by a variety of things, such as a cracked pan, a hole in the pan, or a clogged drain.

If you notice water leaking from your unit, it is important to have it inspected by a professional as soon as possible.

How To Reset Daikin Mini Split

There is no one-size-fits-all answer to this question, as the best way to reset a Daikin mini split may vary depending on the model and make of your unit. However, in general, you can reset your Daikin mini split by following the instructions in your owner’s manual or by contacting a qualified HVAC technician.

Here are the steps:

  1. Power down the unit by turning off the circuit breaker.
  2. Remove the batteries from the remote control.
  3. Press and hold the “Reset” button on the control panel for three seconds.
  4. Replace the batteries in the remote control.
  5. Turn on the circuit breaker.

Daikin Mini Split Not Cooling

If your Daikin Mini Split is not cooling, it may be due to one or more of the following:

Dirty air filter

If your Daikin mini split is not cooling due to a dirty air filter, you should clean or replace the filter.

A dirty air filter can restrict air flow, causing the unit to work harder and decreasing its efficiency.

Incorrect thermostat settings

If your Daikin mini split is not cooling properly, it is likely due to incorrect thermostat settings. The first thing you should check is the set point temperature. The set point temperature is the temperature at which the mini split will turn on and off. If the set point temperature is too high, the mini split will not turn on often enough to keep the room cool. Conversely, if the set point temperature is too low, the mini split will turn on too often and will not have enough time to properly cool the room.

Another setting that can affect the cooling of your mini split is the fan speed setting. If the fan speed is set to low, the mini split will not be able to circulate the air properly and will not cool the room as effectively.

Finally, make sure that the mini split is set to the cooling mode. If it is set to the heating mode, the mini split will not be able to properly cool the room.

Dirty Evaporator and Condenser

The evaporator coils are located on the underside of the indoor evaporator unit, whereas the condenser coils are located on the outside, exposed to the elements.

Over time, the coils will accumulate dirt from the air, the outdoor air, or both. Eventually, the coils will get so dirty they won’t be able to quickly or efficiently transfer heat and could even fail completely.

To keep your coils clean and your unit running safely and efficiently, it’s important to regularly check your evaporator and condenser coils, and wipe them down as needed.

Low refrigerant level

First, check whether there is any refrigerant leakage. If there is refrigerant leakage, repair it and recharge the system with the proper amount of refrigerant.

If there is no refrigerant leakage and the refrigerant level is low, the system may not have been properly charged during installation. In this case, you need to have a technician check the system and add more refrigerant.

Damaged compressor

If your Daikin mini split is not cooling, it is likely due to a damaged compressor. The compressor is responsible for circulating refrigerant throughout the system, and if it is damaged, the entire system will not be able to function properly.

In most cases, a damaged compressor will need to be replaced in order to get the system up and running again.

Daikin Mini Split Making Noise

As with any other appliance, there can be reasons why your mini split air conditioner is making noises. The daikin mini split models are also not saved from these. It is good to know the common reasons it is making noises.

The problem of mini split making noise is common for people using Daikin mini split. Although Daikin is one of the best brands in the industry and provides high quality air conditioner, it can create noise. Here are some of the popular reasons why Daikin mini split making noise.

The most common reason that causes this problem is the condenser. The condenser is located in a large and open area that allows the noise to escape. It is also located on the back side of the main unit. This makes it difficult to find and inspect the problem.

Another reason that may cause the noise is the way the compressor works. The compressor is used to compress the refrigerant gas in the Mini Split. That gas is then turned into a liquid and circulated throughout the unit. The compressor itself is located on the back side of the main unit. When the gas is compressed, it makes a sound.

The noise can also be made by the outdoor unit. This is not very common because the outdoor unit is installed on the wall or ceiling. It is normally covered by insulation. The outdoor unit makes the noise if it has a loose connection.

The noise can also be because of the Expansion Valve. Expansion Valve is used to control the flow of refrigerant gas.

Daikin Mini Split Beeping

There are several reasons why your Daikin mini split may be beeping. The most common reason is that the unit is low on refrigerant. Other reasons include a dirty air filter, blocked air flow, or a faulty sensor.

If the beeping is accompanied by an error code on the display, consult the owner’s manual for troubleshooting instructions.

1. The AC is turned on for the first time

When the AC is turned on for the first time, it will make a beeping sound. The sound is normal and indicates the AC is properly functioning.

2. The air filter needs to be cleaned

If the air filter is clogged, the AC will make a beeping sound. This is to indicate that the air filter needs to be cleaned.

3. The AC is low on refrigerant

If the AC is low on refrigerant, it will make a beeping sound. This is to indicate that the AC needs to be refilled with refrigerant.

4. The AC is overloading

If the AC is overloading, it will make a beeping sound. This is to indicate that the AC needs to be turned off for a while to prevent damage.

5. The AC is frozen

If the AC is frozen and making strange noises, it will make a beeping sound. This is to indicate that the AC needs service.

6. Loss of power

If the power to the AC is interrupted, the AC will make a beeping sound. This is to indicate that the AC is not getting power.

7. Fan failure

If a fan stops working, the AC will make a beeping sound. This is to indicate that the fan needs service or replacement.

8. Remote control failure

If the remote control is not working, the AC will make a beeping sound. This is to indicate that the remote control is not working or that it needs a new battery.

9. Fuse failure

If one of the fuses on the AC is blown, the AC will make a beeping sound. This is to indicate that the fuse needs to be replaced.

Final Thoughts

If you have read through the above guide and you still have not been able to fix the problem with your Daikin mini split then we are sorry to say that your unit may be beyond repair.

At this point, it would be a good idea to visit your local Daikin dealer with the model and serial numbers of your unit and ask them if they can help you with your issue.

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