text: <s>[INST] SMC-3 not working! Hi I have used the SMC-3 controller before a few times ok, but today I completed a control panel using 5 SMCs from 3A to 25A. None of these will run a motor, even though the red light stays on and no fault is shown. A voltmeter accross the output shows a constant pulsing of a sort of voltage, but not enough to start a motor. The test button procedure checks out ok. I have succesfully substituted a couple of them with know working SMCs and they run up fine. What are the chances of all 5 being faulty? All different sizes too. I can't think of anything that would stop them running up... [/INST] GRC, verify if the not working SMC-3 are series B... as explained in Aid 38225, they change a dip/switch function in it, that may prevent the motor to start :smileysurprised: Also check Aid 35399 Hope that helps... - fuzzy logic \\n </s>