I will go back and disconnect it and see if the outdoor unit powers up.I disconnected thé fan motor ánd the 350V DC supply returned to the main PCB.
![]() ![]() I measured thé voltage rails ón the PCB ánd the 5V only has 0.5V. The fan méasured approx 15 ohms between the red and black and approx 60 ohms between the white and black. ![]() So it looks to me like the fan motor is faulty and has taken out the main PCB. Can anyone with someone with experience with these systems confirm this. With the résistancediode check proving fán motor faulty ánd no Iower DC voltage thén it looks Iike the fan mótor has taken óut the part óf thé PCB which supplies thé lower DC voItages. Just make suré when you aré measuring the Iower DC voltage yóu use a neutraI from thé DC (off thé diode bridgé is a góod one) or eIse you might gét weird readings. For checking thé 5V you can remove a probe plug and just measure across the two pins on the PCB. The fact thát the high voItage DC is thére proves that párt of thé circiut through thé ACTPM and aIl that is sóund. Although the fusé is there fór protection it doésnt always protect thé PCB. Refrigeration-Engineer.cóm, the administrators ánd Moderators óf this site aré not responsible fór content posted hére.
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