Hi all
I have a Hi-Sense fridge with control board BCD-321WY/HC2 (EXH) for the past 18 months. Suddenly the fridge went completely dead, no signs of compressor running, no fan, no internal lights. I confirmed no problems with power and checked the fuse on the board, all ok.
I disconnecting the board and keeping it out of use for a 2-3 days, on re-connecting it works occasionally but stops after some time. Lights work, fan works and compressor cuts in for some time and stops in a few minutes. After some time no signs of life, everything including light is off.
I have checked the following
Functioning of compressor is OK. Cools down the fridge when run directly on mains supply (240V)
Fan in the freezer works well when run on a 12V DC supply from external power supply
Door switches for freezer and main compartment work well - tested by checking if fan stops when running on the board (not on external 12V supply)
Light works whenever the control board works
No components look burnt on the control board
I found some documentation for the board but it is in Chinese. Tried making sense of it using google translate but not very helpful.
I have attached photos of the board (front and back) along with the documentation in Chinese.
Questions:
I checked the voltage on the primary side of the transformer. It is around 24V. Secondary side only shows about 2V.
Can someone let me know if the high voltage section of the transformer is a SMPS and functions to supply a lower (say 12v or 24v) to the low voltage section of the board.
Can i disconnect the transformer and try supplying a 12V DC supply directly at the transformer secondary contacts (transformer will be removed completely) to check if the low voltage sections control systems work. Can it cause any damage?
It will be very helpful if someone can explain the working of the primary side and any tips on what to check.
Thank you
I have a Hi-Sense fridge with control board BCD-321WY/HC2 (EXH) for the past 18 months. Suddenly the fridge went completely dead, no signs of compressor running, no fan, no internal lights. I confirmed no problems with power and checked the fuse on the board, all ok.
I disconnecting the board and keeping it out of use for a 2-3 days, on re-connecting it works occasionally but stops after some time. Lights work, fan works and compressor cuts in for some time and stops in a few minutes. After some time no signs of life, everything including light is off.
I have checked the following
Functioning of compressor is OK. Cools down the fridge when run directly on mains supply (240V)
Fan in the freezer works well when run on a 12V DC supply from external power supply
Door switches for freezer and main compartment work well - tested by checking if fan stops when running on the board (not on external 12V supply)
Light works whenever the control board works
No components look burnt on the control board
I found some documentation for the board but it is in Chinese. Tried making sense of it using google translate but not very helpful.
I have attached photos of the board (front and back) along with the documentation in Chinese.
Questions:
I checked the voltage on the primary side of the transformer. It is around 24V. Secondary side only shows about 2V.
Can someone let me know if the high voltage section of the transformer is a SMPS and functions to supply a lower (say 12v or 24v) to the low voltage section of the board.
Can i disconnect the transformer and try supplying a 12V DC supply directly at the transformer secondary contacts (transformer will be removed completely) to check if the low voltage sections control systems work. Can it cause any damage?
It will be very helpful if someone can explain the working of the primary side and any tips on what to check.
Thank you
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