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  1. K

    MEP 803A Overload Fault Troubleshooting

    It could be one of the resistors has failed open. I'd suggest disconnecting the two wires to CT3 and then measure the resistance between the two removed wires. It ought to be 3.75 ohms. The resistance of R12 & R13 7.5ohm resistors in parallel. If you get about 7.5 ohms then I'd suspect one...
  2. K

    MEP 803A Overload Fault Troubleshooting

    At 100% both R12 and R13 should have the same voltage of about 5 volts like the other resistors.
  3. K

    MEP 803A Overload Fault Troubleshooting

    You indicated you had 9.5 v across R12. What's the voltage across R13? When set to 120/240 the switch connects R12 and R13 in parallel. My hunch is they are not getting connected in parallel resulting in about 2x the voltage.
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