Almost certainly your pushbutton unit has a stored code for low refrigerant, which will cause the EC lamp to stay on and the compressor to stay off. Now you will probably also have a code for a bad electromagnetic clutch due to disconnecting the wire, so you can ignore that code when you read them.

Did you ensure that you had positive pressure in the system before adding refrigerant? If so, you should have it sniffed for leaks. If not, or there was no pressure, the dryer should be replaced also.