The manual dedicates an entire chapter (Chapter 7) to fault codes. Here are the most common errors for the CHE100-0R7G-S2:
| Fault Code | Description | Likely Cause & Solution (from manual) |
| :--- | :--- | :--- |
| E.OC1 | Overcurrent during acceleration | – Acceleration time too short (increase P0-06).
– Motor short circuit (check U,V,W wiring). |
| E.OU1 | Overvoltage during deceleration | – Deceleration time too short (increase P0-07).
– Add braking resistor (manual shows TB/TA wiring for brake). |
| E.LU | Low voltage | – Input voltage drops below 170V. Check L/N connections or supply stability. |
| E.OH | Overheat | – Heatsink temperature >85°C. Clean fan or improve ventilation. |
| E.SC | Motor short circuit | – Immediate trip. Power off, measure resistance U-V, V-W, W-U (should be equal, > few ohms). |
| E. EF | External fault | – Terminal S input configured as external fault has been triggered. | invt che100-0r7g-s2 manual
Reset procedure: Press STOP/RESET key twice. If fault persists, cycle input power after 30 seconds. The manual dedicates an entire chapter (Chapter 7)
Answer (Appendix B): INVT recommends a 10A Type C miniature circuit breaker (MCB) for the 0R7G-S2 model, plus a class 10A mains filter for harmonic reduction. Answer (Appendix B): INVT recommends a 10A Type
This is the most-accessed section of the manual. Common codes for the 0R7G-S2:
| Fault Code | Meaning | Likely Cause for 0R7G-S2 | Manual Guidance | | :--- | :--- | :--- | :--- | | E.oC1 | Overcurrent during acceleration | Acceleration time too short; motor short circuit | Increase P0-06; check motor winding resistance | | E.oU1 | Overvoltage during deceleration | Deceleration time too short; regenerative load | Increase P0-07; add braking resistor | | E.Lu1 | Undervoltage | Input voltage dips below 200V | Check mains supply; check for loose R/T terminals | | E.oH | Overheat | Heatsink temperature >85°C | Verify fan operation; clean dust; check ambient temp | | E.SC | Short circuit | Output U/V/W shorted or to ground | Disconnect motor; run VFD unloaded; test motor insulation |
When you open the INVT CHE100-0R7G-S2 manual, start with these five sections sequentially: