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Replacement Of Board In ATOMBERG BLDC Fan Model EFFICIO 1200

By on March 23, 2024
ceiling fan repair

 

 

 

 

 

dc fan repair

This BLDC (Brushless Direct Current) Fan was brought to me by a regular Electrician customer stating that lightning blew the board and wanted me to check up whether it can be revived or replaced with a new board.

The Fan was brought in the condition that you see above. I removed the board and checked the extent of damage:

how to fix dc fan

The burnt IC was DRV10983 12- to 24-V, Three-Phase, Sensor-less BLDC Motor Driver. Though I tried to remove the IC using my Hot SMD Remover setting at its maximum temperature, adjusting the air blow, the IC did not budge. I removed the three caps at the bottom and even tried a hotplate, but in vain. The metal body of the IC had bonded with the thick copper layer of the PCB.

Moreover, looking at the condition removing it was also a most probable waste of efforts. So, I requested for a new board through my techie friends Whatsup group and one of my close friends responded and arranged for an original new board which was an exact replacement.

ceiling dc fan replacement board

Fixing the board was easy. The Yellow, Blue and Red wire from the coils should be connected according to the marking on the board and should not be interchanged. What I understood from my friend is that the fan has three phase-winding with the other end joined. Pulses are pumped by the IC in succession to make an electromagnetic force which moves the rotor. Observing the colour code while connecting is very important. The coils show only a few ohms (around 2.5 to 3) between. The output from the SMPS circuit is 24V, which can be measured without connecting the load. I hung the fan on a plastic stool, which had a hole in the middle.



I inserted the long rod into it and put a screw driver in the slot to hold it in place. Then applied power, upon which the LED lit and it just jerked, indicating that the board was working. Then removed the fan and fit the top cover, which has half of the metal housing for the magnetic effect. Then fit the fan again in the stool and allowed it to run for more than one hour, while using the remote for various speeds, on/off functions etc. It worked very well, bringing satisfaction to get collected as usual!

how to repair a brushless dc fan

Parasuraman

This article was prepared for you by Parasuraman Subramanian from India. He is 74 years old and has more than 30 years’ experience in handling antique equipment like Valve Radio, Amps, Reel Tape Recorders and currently studying latest tech-classes conducted by Kerala State Electronics Technicians’ Association. He has done graduation in BBA degree, private diploma in Radio Engineering and retired as MD of a USA company. Presently working as Consultant to Hospital and other institutions.

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11 Comments

  1. Yogesh Panchal

    March 23, 2024 at 3:36 pm

    Goof Fix! Sir
    five-star rating devices are made for low electricity consumption & power saving,We already buying these devices consuming almost 3-times higher price than normal working Design, but if anything goes wrong whole saving is consumed for the repair. this concept does not make any sense for saving anything.

    Likes(5)Dislikes(1)
    • Parasuraman S

      March 23, 2024 at 7:38 pm

      Yes, you are right! Many thanks!

      Likes(1)Dislikes(0)
  2. Albert van Bemmelen

    March 23, 2024 at 4:11 pm

    Most motors and generators like used in wind generators are mainly three phased now. I made a 3 phase generator to be able to test those motors with the electronic components in this project that I also 3D printed:
    https://www.thingiverse.com/thing:370886

    Likes(7)Dislikes(1)
    • Parasuraman S

      March 23, 2024 at 7:39 pm

      Vow! Great! Many thanks for sharing!

      Likes(3)Dislikes(0)
    • Nitin

      April 12, 2024 at 7:02 pm

      Sir, where can I buy this PCB. Exactly the same. My PCB got burnt and is not repairable.

      Likes(0)Dislikes(0)
  3. Tayo

    March 23, 2024 at 6:17 pm

    Great effort Parasuraman!
    Masking the chip off with kapton tape (or aluminum foil helps protect surrounding components so you can be free (or free-er) to heat the target chip up longer. There is also a low temp melt solder that can be applied to help transfer heat more effectively into those big chips and break them loose.

    Likes(5)Dislikes(0)
    • Parasuraman S

      March 23, 2024 at 7:39 pm

      Many thanks for your expert suggestions!

      Likes(1)Dislikes(0)
  4. Imoudu.O

    March 24, 2024 at 3:55 am

    Is the fan motor powered by dc or ac voltage/ current? thanks for sharing sir.

    Likes(1)Dislikes(0)
    • Parasuraman S

      March 24, 2024 at 10:27 pm

      BLDC fan motor works on direct current, consisting of permanent magnets instead of electromagnets (in conventional fan motors). The permanent magnet makes BLDC fan motors lose less energy than conventional fans. BLDC motor converts the alternate current into direct current, allowing fans to work smoothly even at power fluctuations and low voltage. https://atomberg.com/blog/post/brushless-dc-fans

      Likes(0)Dislikes(0)
  5. Jackson Joseph

    April 1, 2024 at 2:19 pm

    I also got 3 fans burned in lighting.. atomberg doesn't have the replacement board since it's their 1st model in 2016.the current boards are different..can it be repaired or a compatible board be fixed

    Likes(1)Dislikes(0)
    • Parasuraman S

      April 3, 2024 at 4:15 pm

      You may have to try with the new board from them. Repairing might not be easy.

      Likes(0)Dislikes(0)

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