Abb Unitrol 1000 User Manual [repack] Link
| Code | Description | Likely Cause | Manual Reference | |------|-------------|--------------|-------------------| | | Mains undervoltage | Supply grid dip or blown input fuse | Section 8.3.1 | | F012 | Field overcurrent | Shorted rotor winding or incorrect current limit | Section 8.3.2 | | F023 | Loss of sensing voltage | Broken PT wire, open fuse on V-measuring board | Section 8.3.4 | | F056 | Thyristor firing failure | Gate pulse lost, thyristor damaged | Section 8.3.7 | | F101 | Rotor earth fault (high resistance) | Moisture in rotor, brush/ring contamination | Section 8.3.12 | | F204 | Communication error (Modbus) | Wrong cable, polarity reversed (RS485) | Section 8.3.20 | | A301 | Cooling fan failure | Clogged filter, fan bearing seized | Section 8.3.25 |
| Alarm | Cause | Action | |---------------------|----------------------------------------|--------------------------------| | | Prolonged OEL operation | Reduce load, check exciter | | Loss of Sensing | VT fuse blown / wiring open | AVR trips to manual backup | | Under‑excitation | Field too low (>UEL) | Increase excitation manually | | Comm Error | Modbus / Profibus timeout | Check network cabling | | Param CRC Error | Corrupted configuration | Reload default parameters | Abb unitrol 1000 user manual
The factory default is 0000 (four zeros). The manual strongly advises changing this during commissioning (Section 6.2.4). | Code | Description | Likely Cause |
The UNITROL 1000 family consists of several models tailored for specific excitation current requirements: Entry-level model for smaller applications. : Always save parameters to non-volatile memory after
: Always save parameters to non-volatile memory after changes (Menu > System > Save to EEPROM). Failure to do so loses settings on power cycle.