I have a carrier durakool window ac. Error code 5A was flashing for sometime and the cooling was also reduced, as the ac has not been serviced for about 2 years, I got it serviced but the 5A error code is still flashing. Please help.

AC FR means Four- bed room with ac.
https://www.tripadvisor.in/FAQ_Answers-g503703-d666589-t4377077-NON_AC_DR_S_NON_AC_DR_B_AC_FR_NON_AC.html

https://www.facebook.com/2096661483894455/posts/carrier-window-type-error-code-fr-cleaned-and-re-tight-harness-ok-at-quiling-sur/2612752002285398/

Error Code Definition: (Unit Size 36K - 42K) = IPM over temperature protection. Carrier AC Indoor Unit Displays Error Code: P9. Error Code Definition: (Unit Size 18K - 24K - 30K) = NA. Error Code Definition: (Unit Size 36K - 42K) = Open Contactor.
https://removeandreplace.com/2017/08/11/carrier-split-system-air-conditioner-error-codes-and-troubleshooting/

https://www.youtube.com/watch?v=M-fLGOYL84Y

L1 Erorr answar send me Ductable unit carrier

Freon needed.

Its not 5A but SA means energy saver mode.use remote to change to cool mode without energy saver.

Its probably not 5A but SA. And SA means sleep auto it activates on pressing the energy saving button on remote. Its not an error but a feature.

a 5a error code means that The machine does not work due to a paper jam or some sensor problem. here is a list of error codes for the dcp-j125 printer.
Error Code Cause Solution 30,31,32,33,34,35,36
37,38,39,3C,3F The machine does not work due to a paper jam. Clear the paper jam. (Please refer to "FAQs & Troubleshooting" for information on the Paper Feeding.) 40,42,43,44 The internal temperature is too high. Unplug the machine from the AC outlet and if possible cool the room where the machine is located. 46 The ink absorber pad is full and needs replacing. Please contact Brother Customer Service from "Contact Us". 48 There is a problem on the print head, Please contact Brother Customer Service from "Contact Us". 49 The internal temperature is too low. Unplug the machine from the AC outlet and if possible warm the room where the machine is located. 4F There is a problem on the print head. Please contact Brother Customer Service from "Contact Us". 50,51,52,57,5A,5B,5C
5D,5E The machine does not work due to a paper jam or some sensor problem. Clear the paper jam. (Please refer to "FAQs & Troubleshooting" for information on the Paper Feeding.) If the problem still continues after clearing the paper jam, please contact Brother Customer Service from "Contact Us". 8F There is a problem on the paper feed motor. Please contact Brother Customer Service from "Contact Us". A5,A6,A7,A8,AF There is a problem on the scanner. Please contact Brother Customer Service from "Contact Us". E2,E3 There is a problem on the main PCB. Please contact Brother Customer Service from "Contact Us".

Here is an Article that I found that has some useful information for you. http://airmaster.net/troubleshooting/carrier-window-room-air-conditioner-troubleshooting CF means Cooling Fail.

Check us out online at AC Services Boca Raton

5 flashing is ' compressor drive' and check the high pressure, condenser fan motor capacitor for proper running

If you bought the unit new and it's only 3 months old, the motor should be under warranty and whoever installed the unit should replace the motor for free and Carrier should pay him for the warranty work.