| 10 | Undervoltage | Power supply voltage too low | Power supply drop below 160 V (200 V unit) or 280 V (400 V unit), input power fluctuation, defective supply | Check line voltage, stabilize input, reset by power cycle or reset signal |
| 12 | Memory Error 1 | RAM failure | Faulty control PCB components | Replace servo amplifier |
| 13 | Timer Error | Internal timer fault | Controller or CPU board malfunction | Replace amplifier |
| 15 | Memory Error 2 | EEPROM failure | Memory hardware defect | Replace amplifier |
| 16 | Encoder Error 1 | Communication lost between encoder and amplifier | Loose or defective CN2 connector, broken cable, encoder failure | Check cable and connector, replace encoder or drive |
| 17 | Board Error | CPU or board malfunction | Short circuit or hardware fault | Replace servo amplifier |
| 19 | Memory Error 3 | RAM fault | Hardware malfunction | Replace drive |
| 1A | Wrong Servo Motor | Incompatible motor connected | Wrong combination of drive and motor | Connect matching type |
| 20 | Encoder Error 2 | Encoder communication error | Encoder defective, wiring break or short | Repair cable or replace encoder |
| 24 | Power Circuit Fault | Leakage or short between main circuit and ground | Wrong wiring of TE1 (P/U/V/W), low insulation resistance, damaged power module | Correct wiring, replace faulty cable or module, reset after fault cleared |
| 25 | Absolute Position Lost | Absolute data lost | Battery voltage low, battery disconnected, encoder capacitor discharged | Replace battery, check wiring, perform home return |
| 30 | Regenerative Overload | Brake circuit overload | Wrong brake resistor, too frequent braking, failed transistor or fan | Check resistor and wiring, replace damaged components, allow to cool, reset |
| 31 | Overspeed | Motor speed exceeded limit | Excessive accel/decel ramp, unstable system, encoder error | Adjust ramp time, tune control loop, inspect encoder/motor |
| 32 | Overcurrent | Current exceeds rated value | Short between U/V/W, motor ground fault, damaged output stage | Eliminate short, repair or replace amplifier, reset |
| 33 | Overvoltage | DC bus voltage exceeded | Missing or wrong brake resistor, power surges | Check brake resistor, inspect supply voltage stability |
| 34 | CRC Error | Communication checksum error | Bus cable not connected or damaged, noise interference | Reconnect or shield bus, add termination resistor |
| 35 | Input Frequency Too High | Input pulse frequency exceeds spec | Incorrect program parameters | Reduce command frequency |
| 36 | Transmission Error | Bus or board communication error | Bus not connected, board defective | Check network wiring or replace drive |
| 37 | Parameter Error | Out-of-range parameter | Incorrect setting or memory error | Correct parameters or replace drive |
| 45 | Power Unit Overheat | Power stage temperature too high | Blocked airflow, fan failure, high ambient temperature | Restore cooling, keep cabinet <55 °C, allow cooling and reset |
| 46 | Motor Overheat | Motor thermal limit exceeded | Overload, poor ventilation, defective thermistor | Reduce load, check air flow, ensure mechanical freedom |
| 50 | Overload 1 | Output current exceeded rated value | Mechanical overload, unstable loop, wiring or encoder fault | Reduce load, retune drive, check connections |
| 51 | Overload 2 | Max. output current exceeded for several seconds | Mechanical overload, loose wiring, unstable operation | Verify mechanics, re-adjust limits and control, fix fault |
| 52 | Excessive Error | Following error beyond limit | Accel/decel too sharp, small “in-position” value, mechanical impact, encoder error | Increase tolerance, reduce ramp, check mechanics/encoder |
| 8E | Serial Communication | SSCNET communication error | Cable fault, mismatch with controller | Inspect SSCNET wiring and compatibility |
| 88 | Watchdog | CPU supervision error | Internal microprocessor fault | Replace servo amplifier |