: You can view or download the comprehensive GMR-32B series manual on ManualLib . It covers the micro-control electric circuit and protection settings.
The front panel has three LEDs:
Drill mounting holes matching the dimensions of the GMR32B baseplate.
The GMR32B is a simple device to wire. It has clear, numbered terminal blocks for power input and relay output.
Check if the three-phase input power is present at the L1, L2, L3 terminals. LED is showing a fault (Red/Flashing):
Core Concepts (short primer)