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YCAV0187 VSD run relay code
circuit 2. display shows relay on and software on. relay sending 120v tocntrl board j4-5 and vsd logic board j10-5.manual states needs to see both within 5secs.how do you determineif it is software or hardware input it does not see. ifeel issue is in logic board but need some way to verify.
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run a separate hardwire directly from the output board to the VSD logic board , if it works then it's harwired fault , if not then check the RX/TX led's on the motherboard to logic board, if comms is not working properly then you can change out the small 8 leg comms chip in either motherboard or logic board.
If it is hardiwre fault , check the HP switch as that is in series with the hardwire run command, it is usually a bad wire on the HP switch.
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