| Terminal | Signal | Function (2021 default) | | -------- | ---------- | ------------------------------------ | | +10V | Reference | 10V DC for external potentiometer | | AI1 | Analog In | 0–10V or 4–20mA (configurable) | | GND | Common | Reference for analog signals | | D1 | Digital In | Forward run (FWD) | | D2 | Digital In | Reverse run (REV) | | D3 | Digital In | Multi-speed input 1 | | D4 | Digital In | Fault reset | | +24V | Power | 24V DC for digital inputs | | COM | Common | Digital input common | | AO1 | Analog Out | 0–10V output (e.g., frequency meter) | | RA, RB | Relay | Fault output (normally open) |
2021 change: The factory default for AI1 is now 0–10V (instead of 4–20mA in older versions). This is listed in Appendix B of the PDF.
The safest source is the official Tverter (or its distributor’s) website. As of 2021, Tverter organized its support section by series and year. Look for: tverter k1 series manual pdf 2021
One of the most appreciated improvements in the 2021 manual is the revised wiring diagrams. The K1 Series uses a modular terminal block:
To assess the content, safety information, installation guidelines, and parameter settings of the T-VERTER K1 Series manual, if available. | Terminal | Signal | Function (2021 default)
The 2021 manual includes an expanded fault table. Here are the most frequent errors:
| Fault Code | Description | Likely Cause & Solution (from manual) | | ---------- | -------------------------------- | ------------------------------------------------------- | | OC | Overcurrent during acceleration | Short circuit at motor terminals; increase accel time. | | OU | Overvoltage during deceleration | Braking resistor too small; extend decel time (P0.05). | | SC | Short circuit (module fault) | Check motor insulation; replace IGBT module. | | OL | Motor overload | Increase P1.02 (motor current) slightly; reduce load. | | LU | Low voltage (undervoltage) | Check input supply; voltage sag. | | OH | Overheat (heatsink >85°C) | Clean fans; improve ventilation. | | CE | RS485 communication error | Check wiring and P9.00 (baud rate mismatch). | 2021 change: The factory default for AI1 is
2021 addition: New fault EF – External fault triggered via digital input. Reset by setting D4 to "external fault" and shorting to COM.
The 2021 manual corrects an earlier error: The command source must be set to P0.01=2 (RS485) for Modbus control to work. This was missing from the 2019 edition.
The heart of the tverter k1 series manual pdf 2021 is the parameter table, organized into 10 groups (P0–P9). Here are the most frequently used parameters: