Are you also a Fujitsu air conditioner user? Do you also face unusual issues with your AC? Worry no more as I am here to help you in the best possible way. There is no doubt that no matter how successful a brand is, you will always come across issues when it comes to their appliances. As they say: “You cannot trust machines”. This statement is true because one day your machine is working all good and the very next day you see that there is some problem going on with it. Follow this article till the end if you are also one of such users.
Fujitsu Air Conditioner Troubleshooting – Common Problems
To start with, it is important to first target the common problems faced by Fujitsu air conditioners and then move on to their fixes. Some of the commonly faced Fujitsu Air Conditioner problems are:
- Air Conditioner not Turning ON
- Air Conditioner Flashing Lights
- Air Conditioner Water Leakage
These problems are the real culprits behind your air conditioner not working properly.
Fujitsu Air Conditioner Common Error Codes
Following are the common error codes of Fujitsu air conditioners.
| LED Error Code | Meaning |
| 1 flash | Communication error (Indoor unit – Outdoor unit) |
| 2 flash | Discharge pipe temperature sensor |
| 3 flash | Outdoor heat exchanger temperature (outlet) sensor |
| 4 flash | Outdoor temperature sensor |
| 5 flash | Outdoor heat exchanger temperature (mid) sensor |
| 6 flash | Discharge pipe temperature abnormal |
| 7 flash | Compressor temperature sensor |
| 8 flash | Heat sink temperature sensor |
| 9 flash | Pressure switch abnormal |
| 10 flash | Compressor temperature abnormal |
| 12 flash | IPM error |
| 13 flash | Compressor rotor position cannot detect |
| 14 flash | Compressor cannot operate |
| 15 flash | Outdoor fan abnormal (upper fan) |
| 16 flash | Outdoor fan abnormal (lower fan) |
| 5 sec on/ 0.1 sec off repeat | PAM voltage abnormality |
| 5 sec on/ 1 sec off repeat | Protect operation |
| 5 sec on/ 2 sec off repeat | PFC surge protection (permanent stop) |
| 5 sec on/ 5 sec off repeat | Fan malfunction |
| 2 sec on/ 2 sec off repeat | CT abnormality |
| 2 sec on/ 5 sec off repeat | Compressor temperature protection (permanent stop) |
| 1 sec on/ 1 sec off repeat | Pump down operation |
| 0.5 sec on/ 0.5 sec off repeat | Current surge protection |
| 0.1 sec on/ 0.1 sec off repeat | Thermistor malfunction |
| 0.1 sec on/ 2 sec off repeat | Compressor position detection malfunction |
| off | No error |
Discussing Fujitsu AC Problems in Detail
Now it is time to discuss the problems in a bit detail.
1. AC Not Turning ON
Your AC not turning ON could be due to the following reasons.
-
AC is Dirty
The first reason why your AC is not turning ON is because it is dirty. Dirty and filthy AC units can severely damage the internal components of your cooling system. Like this, the AC unit will find it difficult to perform proper functioning. Some operations can be halted if the filters have become clogged.
Fix Solution
You should clean the indoor unit of your AC in order to fix the issue.
-
AC Tripped a Circuit
Examine the circuit breaker box for faulty electrical wiring and tripped breakers. For this, you need to simply flip the switch to its initial position and it should resolve the issue.
Fix Solution
Unfortunately, if the unit keeps tripping the breaker then you must contact a technician to have the unit checked.
-
Outdoor Unit Overheating
If the outdoor unit is overheated then it will eventually power off and will not turn back ON until and unless the power button is pressed. As outdoor units are placed outside and exposed to sunlight, they can overload the cooling system.
Fix Solution
Always place your outdoor unit in shade to protect it from heat and sunlight.
2. Air Conditioner Flashing Lights
You might have noticed that your Fujitsu indoor unit has LED lights flashing from time to time. The problem isn’t with the flashing lights but with the message they are trying to indicate. Flashing lights show that there is some underlying problem with your air conditioner. The nature of the problem can be figured out once you know the meaning behind the number and colour of flashing lights.
Fix Solution
What you need to do is count the number of flashing lights and number of flashes during interval. Confirm the issue by consulting the user manual and looking at the error code table to see what the actual issue is.
3. Air Conditioner Water Leakage
In case your AC unit is leaking water, it means there is a refrigerant leak that is causing it. When there is a refrigerant leak in the AC, the coolant escapes, freezing the condensate around the evaporator coil and air filter. As a result, the AC unit will not be able to cool the air and thaw the ice.
Moreover, refrigerant leakages can also cause the unit to freeze up, overheat, make noises and smell. If you are facing the same issues then it means there is a refrigerant leakage in your system.
Fix Solution
Contact an expert to get the refrigerant leakage issue fixed. In addition to this, make sure to clean the drain line in order to remove any obstructions. If there is any water present in the drain pan, you need to remove it as well.
Troubleshooting Guide:
Well now comes the main part, the troubleshooting guide. You need to follow the below fixes in order to resolve the issues faced by you.
1. Reset your AC
Resetting a Fujitsu air conditioner is easy as most of the models have a reset button. The button is located on the remote control with the label “Reset” or “ACL”. You would need a pin to activate it. Keep pressing the reset button until the control board screen goes blank. The system will take some time to reboot.
Note this thing that if you reset your Air Conditioner then all the custom settings will be changed to default. So if you are about to reset your AC then you need to keep this thing in mind that the custom settings will be wiped away.
2. Consulting User’s Manual
Check the user manual which comes with your Air Conditioner to follow the troubleshooting steps. Make sure to read the correct manual that is for your AC model. Troubleshooting guides for every AC model is different so you need to make sure that the manual is relevant to your model.
Check More Air Condition Fixation:
Hisense Portable Air Conditioner Not Cooling 7 Fixation 2024
3. Contact the Experts
If the issue is not recognized by you then you can simply contact experts to get the job done for you. You can either contact the professional experts or local ones, the choice is yours.
Frequently Asked Questions
Q – How do I self-diagnose my Fujitsu air conditioner?
A – To initiate the self-diagnosis, press the START/STOP and SET TEMPERATURE buttons simultaneously for at least five seconds.
Q – What do flashing lights mean on a Fujitsu air conditioner?
A – Usually, a blinking light means that there’s an issue with your Fujitsu air conditioner right now. The interior unit of Fujitsu air conditioners has three lights: an economy light, an operation light, and a timer light. The economy light will blink nonstop as soon as a mistake is found.
Q – What are the best settings for Fujitsu air conditioners?
A – It is advised that you set the air conditioner to cold (22–24 degrees) in the summer and heat (up to 21 degrees) in the winter.
Conclusion
All in all, the above mentioned problems along with their fixes are the most common ones. Once you know how to deal with them, you will never have to worry about them. Follow my guide and you will not be disappointed ever!