Gmr32b+phase+controller+manual+patched -

Given the information you've provided ( gmr32b+phase+controller+manual+patched ), I'll make an educated guess that you're dealing with a piece of industrial or electronic equipment used for controlling phases in a power system or a similar application.

Swap any two input wires; if the red LED activates, the sensor is working correctly. gmr32b+phase+controller+manual+patched