The status LED indicators provide instant feedback on your three-phase line health:
| Symptom | Probable Cause | Corrective Action | | :--- | :--- | :--- | | | No power supply / Internal Fuse blown. | Check L1/L2/L3 input connections; check internal fuse. | | Red LED Lit (Phase Loss) | Broken wire or blown upstream fuse. | Use multimeter to verify voltage on all three input terminals. | | Red LED Lit (Phase Seq) | L1, L2, L3 connected in wrong order. | Swap any two incoming power lines (e.g., swap L1 and L2) at the input terminal. | | Intermittent Tripping | Loose connection or Hysteresis set too low. | Tighten terminal screws; Increase Ud (Unbalance) threshold slightly. | | Relay Not Switching | External load exceeds relay rating. | Verify load current is < 3A; check for short circuit in external control wiring. |
Verify that the control signal wires are completely separated from the high-voltage lines to prevent electrical noise interference. gmr-32b phase controller manual
Protecting massive scroll compressors from reverse rotation.
Automatically trips if the phase order (L1, L2, L3 or R, S, T) is incorrect, preventing motors from running in reverse. The status LED indicators provide instant feedback on
The structural housing utilizes a dual-option layout optimized for quick panel organization:
Press and hold for 3 seconds to enter the configuration menu. Use UP or DOWN to scroll through the parameter codes. Press ENTER to edit a parameter value. Adjust the value using UP/DOWN , then press ENTER to save. Key Parameter Codes P-01: Control Input Mode 0 : 4-20mA Input (Default) 1 : 0-10V DC Input 2 : Manual Potentiometer P-02: Output Soft-Start Time | Use multimeter to verify voltage on all
Global Power Systems GMR-32B Phase Controller: Complete Installation, Programming, and Troubleshooting Manual
Up to 500V AC (Standard models often cover 200–500V). Protection Functions:
The GMR-32B is a sophisticated electronic power protector built on digital circuit technology (MCU-based) to monitor three-phase power supplies. Unlike other relays that only look for phase loss, the GMR-32B guards against a range of destructive grid anomalies: phase sequence errors (reverse phase), static/dynamic phase loss, over-voltage, under-voltage, and voltage imbalance.
Two Normally Open (NO) and two Normally Closed (NC) contacts Contact Switching Capacity: 250VAC @ 6A / 30VDC @ 3A Conventional Heating Current: 8A Response/Trip Time: ≤is less than or equal to