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When the scorching Queensland heat returns in summer, many of us will be cranking our Daikin air conditioner to keep us in blissful comfort. Unfortunately, the system has to work hard to fight the oppressive heat, and as it grinds away for hours on end, its refrigerant depletes, its parts wear down faster, and eventually it’ll give up with a sad splutter, and you’ll be drenched with sweat faster than you can say “Crown Power.”If you’re in a sticky situation like this, and you’d rather attempt your own fix before calling in the professionals, this Daikin air conditioner troubleshooting guide will help you on your way. We tackle the most common questions that we receive from clients whose Daikin air conditioner has suddenly thrown down its tools and refused to work—everything from “why is my Daikin aircon not working?” to “what does this flashing green light mean?”Daikin troubleshooting doesn’t have to be arduous. In this Daikin AC troubleshooting guide, we offer quick and easy tips on how to fix almost every issue you can think of, including whether it’s safe for you to do so.
You may be surprised to learn that if you’re having air con problems, you don’t necessarily need to call a technician out. Often, there’s an easy solution to get your air con up and working again, which is why we’ve created this Daikin inverter troubleshooting guide.If troubleshooting your Daikin air conditioner isn’t going as planned, and none of the suggestions below work, we recommend giving us a call. We’re authorised Daikin specialists, and are able to offer fast, affordable help.
Wondering why your Daikin inverter isn’t turning on? Here are a few simple checks you can do to figure out the problem, and reset your Daikin air conditioner.If the on/off button is off
If the operation lamp is flashing (green flashing light)
Before starting these tests, close all windows and doors to the room you’re cooling, to seal the air inside.If your air conditioner is not producing cold air:1. Double check the temperature on your remoteYour remote will display a number in degrees Celsius. Here’s how to set temperature on a Daikin air conditioner:
2. Check that the air filters are cleanOur experts recommend cleaning your air con filters once every two weeks in summer, when it’s used heavily. Otherwise, it’s okay to wash your air-purifying filter once every six months.Unsure how to clean your Daikin’s air filters? Follow the simple steps in our guide to maintaining your air conditioner.3. Check that the air con is clear of obstructionsCheck that the areas surrounding the air con aren’t blocked by furniture or decor items.4. Check your doors and windowsCheck that the doors and windows to the area are closed, as this will prevent the unit from cooling the area effectively.5. Check that the sensor is workingIf your Daikin aircon is not cooling your room effectively, it may be a Daikin sensor problem. Sometimes, the sensor doesn’t detect people who are far away from the indoor unit. You can troubleshoot this by moving closer to the air con and checking that the air quantity and direction are properly controlled, and that the ventilation fan is moving.
If your Daikin air conditioner has a flashing green light, don’t panic. While there are a few different issues that can be indicated by a blinking green light, most of them are pretty easy fixes.Here are some steps to follow:
You can access the full list of Daikin air conditioner fault codes from this page.
If the timer lamp on your AC unit is flashing orange, the Streamer unit needs to be cleaned. To clean the unit, you can follow the instructions on page 36 (under Streamer unit) of this Daikin guide.
If water is leaking from your indoor air con, unplug it and contact a professional. It is common for air conditioning units to produce some condensation, but a considerable leak could be a major safety issue, so do not touch the air con unit or attempt to fix it yourself.
This means that the dust box needs to be cleaned. To clean the dust box, you can follow the instructions on page 37 (under Dust box) of this Daikin guide.
If your Daikin aircon remote isn’t working, first try to reset your Daikin remote or controller.Here’s how to reset a Daikin air conditioner remote:
If this button on your remote or air conditioning unit is not working, unfortunately, you will need to contact the retailer who sold you the unit, or professional air conditioning technicians such as Crown Power.
Sounds like a case of flat batteries. Replace the batteries, and if the issue doesn’t improve, contact your distributor.
If your remote control seems to be working intermittently, or if the digital display is looking faded, replace the batteries for the controller.
If you’ve lost the remote control, you can turn the air conditioner unit on and off by pressing the ON/OFF button on the main unit. When this button is used, the AC will use its automatic settings.
If your Daikin air con is making a noise, the first thing to identify is the type of sound. Here are some possibilities:
If your air conditioning unit is producing unpleasant smells, the odour may be a sign of bigger problems.If you smell something burning, switch off power immediately and contact a professional.If the smell is unpleasant, it’s probably discharge from the unit’s purifying operation. It isn’t hazardous, and should dissipate quickly.Please don’t apply cleaning spray or odour spray to your air conditioning unit at any stage. It’s not necessary and may cause damage that will void your warranty.
During summerIf your Daikin air conditioner is not producing heat in summer, you may have:
If the filter is clogged and filthy, you can clean this easily by following the instructions in our Daikin Air Conditioner Maintenance guide. If you’ve found a refrigerant leak, or believe that the coils are dirty, turn off your air con immediately to prevent further damage and call a reputable professional for assistance.During winterWhen it comes to Daikin heat pump troubleshooting in winter, here are some possible reasons:
Unfortunately, you’ll need to contact a professional to fix these problems.
If your air con suddenly stops, or turns on and off repeatedly, this is usually nothing to worry about. When the unit stops unexpectedly, it’s usually protecting itself from voltage fluctuations, and should start working again within a few minutes.When the temperature in your room reaches the set level the unit switches to “breeze mode” to maintain the temperature. When the temperature fluctuates, the unit will increase the volume of air flow. A stable room temperature is the goal of a good unit, so if this is happening, our Daikin air conditioning troubleshooting guide recommends leaving this well alone.
If your heating stops unexpectedly and you hear the sound of water flowing, your outdoor unit is running its defrost operation. This should resolve itself in about 10 minutes.
If you’ve turned off the dehumidifier, dry cooling, and cooling settings, and your air con is still working, check your mould proof setting. If it’s on, this is what is preventing your air con from turning off.
If the humidity goes below the set level or doesn’t reach it, there’s a simple fix. If your unit is on “humidifying heating” mode, lower the setting for the temperature. If it’s in “humidifying” mode, increase the humidity setting and select “continuous” operation.
This may be caused by frost on the unit. The pipes on the outdoor unit will get cold during cooling, which produces condensation and causes water to drip. This is usually nothing to worry about unless it causes other problems.
If your Daikin AC is tripping the breaker or fuse, turn it off immediately and contact the retailer.
If the flap has been touched during operation, it may not close properly. This can easily be fixed by turning the unit on, giving it time to start, and then turning it off again.
If your auto filter cleaning setting is on, your Daikin AC will stop after 24 hours of continuous operation, complete the filter cleaning process, and resume normal operation. This is nothing to worry about.
If you have a ducted air conditioner and your Daikin zone controller is not working, we recommend contacting an air conditioning specialist immediately.
Here’s the full list of Daikin air conditioner fault codes, lifted directly from this PDF from Daikin.If there’s a fault with the Daikin system, this will sometimes show on the remote control or wall-mounted controller. Or you may have to complete a sequence on the remote controller to get the code to appear, which Daikin explains in this document.It’s highly unlikely that you will be able to fix the fault yourself, but it can give you an idea of what might have gone wrong with the air conditioner. You can also pass the fault code onto the air conditioning technician when you call them so that they come fully prepared.
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Crown Power are authorised Daikin air conditioning specialists. If you need help with Daikin split system troubleshooting or Daikin ducted air conditioning troubleshooting, we’re happy to answer your questions, or to fix your AC for you.Contact Crown Power today on 0427 175 654 (Brisbane & Sunshine Coast), or 0421 376 620 (Gold Coast).
