Hi everyone,
I'm currently working with a **Power Electronics SD750FR** drive (Active Front End) and it's throwing several faults and warnings that are preventing it from operating. I've attached photos of the display for reference.
The specific codes appearing are:
* **FAULT 183 (R23:I Hall):** This seems to point towards the current Hall effect sensors.
* **FAULT 176 (R16:Temp LCL):** Indicating overtemperature in the LCL filter.
* **WARNING W28 (PLL rect):** Related to the Phase-Locked Loop in the rectifier, likely a synchronization or grid stability issue.
* **FAULT 30:** (Mentioned in my logs, though not in the pictures; usually refers to external trips).
**Current Status:**
- The unit shows `0.0 A` and `0.0%` load.
- The central status LED is solid red (Fault state).
- Attempting to reset the faults through the keypad hasn't cleared the issues; they either persist or reappear immediately.
**Questions for the community:**
Has anyone dealt with **Fault 183 (I Hall)** before? Does this usually indicate a physical sensor failure or could it be a control wiring/ribbon cable issue?
Regarding **Temp LCL (F176)**, could this be a faulty thermistor? The filter shouldn't be overheating since there is no load on the system.
Are there any specific diagnostic steps or "hidden" menus in the SD750 series to verify sensor readings before I call Power Electronics technical support?
Any insights, service manuals, or experiences with these drives would be greatly appreciated. Thanks in advance!