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Ubuteko2010

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    Ubuteko2010 reacted to Shadders in Axpert_MKSII-5KVA error 57   
    I recently repaired a board that had this same error . The board was damaged by a leaking pipe that dripped water onto the inverter through the ceiling which then shorted out the DC bus. AC IGBTs, DC MOSFETs were blown and replaced. Error 57 continued and the problem turned out to be one of the transistors that drive the DC  MOSFETs. It had short circuited and was pulling up the -12V power rail that the HTC sensor needs. So your problem might not be this exact transistor but check the power supply to the sensor.


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