| A.020 | Error 1 Parameter Checksum | Parameter data in the SERVOPACK is incorrect, for example after a voltage drop or too many parameter changes | Check supply voltage, initialize parameters with Fn005, set them again, replace SERVOPACK if necessary |
| A.021 | Error 1 Parameter Format | Parameter data is incompatible or faulty | Check software version and parameters, load matching parameter set, replace SERVOPACK if necessary |
| A.022 | Error 1 System Checksum | Faulty system data in the SERVOPACK | Check power supply, replace SERVOPACK if necessary |
| A.030 | Input Voltage Detection Error | Detection data for mains input is incorrect | Check SERVOPACK, replace if necessary |
| A.040 | Parameter Setting Error 1 | Parameter is outside the valid setting range | Check parameters and set valid values |
| A.041 | Encoder Output Pulse Setting Error | Pn212 is outside the valid range | Correct Pn212 |
| A.042 | Parameter Combination Error | Parameter combination exceeds permissible range | Check and adjust electronic gear, jog operation, or tuning parameters |
| A.044 | Parameter Setting Error with Disabled External Encoder / Direct Measurement System Control | Option module and parameter settings do not match | Match Pn002.3 and option module setting |
| A.050 | Combination Error | SERVOPACK and servomotor power ratings do not match | Check device combination, select matching motor or SERVOPACK |
| A.051 | Unsupported Device Alarm | Unsupported encoder, converter, or device connected | Use the correct system combination |
| A.0b0 | Alarm Servo ON Command Withdrawn | Servo ON was withdrawn incorrectly after auxiliary function | Power cycle and reset software |
| A.100 | Overcurrent or Heatsink Overheat | Overcurrent through IGBT or heatsink overtemperature | Check wiring, short circuit, ground fault, braking resistor, load, and cooling, replace SERVOPACK if necessary |
| A.300 | Regeneration Fault | Fault in braking circuit or braking resistor | Check braking resistor connection and parameters, check B2/B3 jumpers, replace SERVOPACK if necessary |
| A.320 | Regenerative Overload | Regenerative energy exceeds braking resistor capacity | Check supply, braking resistor, load, and operating conditions |
| A.330 | Power Supply Wiring Fault | AC/DC input set incorrectly or mains wiring incorrect | Check supply type, wiring, and braking resistor |
| A.400 | Overvoltage | DC bus voltage too high | Check mains voltage, surges, braking resistor, inertia, and deceleration |
| A.410 | Undervoltage | DC bus voltage too low | Check mains voltage, voltage dips, power interruption, and fuse |
| A.450 | Main Circuit Overvoltage Capacitor | Main circuit capacitor impaired or defective | Replace SERVOPACK |
| A.510 | Overspeed | Motor speed exceeds maximum limit | Check motor wiring, command value, gain, and operating conditions |
| A.511 | Overspeed Encoder Output Pulse Rate | Encoder output frequency is too high | Reduce Pn212, reduce motor speed |
| A.520 | Vibration Alarm | Unusual vibration detected at motor speed | Reduce speed, reduce gain, adjust inertia |
| A.521 | Autotuning Alarm | Vibration detected during tuning | Check and adjust load level and tuning settings |
| A.710 | Overload High Load | Motor was heavily overloaded for a short period | Check wiring, load, motion profile, and mechanics |
| A.720 | Overload Low Load | Motor was continuously overloaded | Change load and operating conditions, use larger motor if necessary |
| A.730 / A.731 | Dynamic Brake Overload | Rotational energy exceeds dynamic brake capacity | Reduce speed, inertia, and number of braking operations |
| A.740 | Inrush Current Limiting Resistor Overload | Main power was switched on and off too frequently | Reduce switching frequency |
| A.7A0 | Heatsink Overheat | SERVOPACK heatsink above 100 °C | Check ambient temperature, load, regenerative energy, mounting position, and cooling |
| A.7AB | SERVOPACK Fan Not Running | Internal fan failed or blocked | Remove foreign objects, replace SERVOPACK if necessary |
| A.810 | Encoder Backup Error | Encoder position data was lost | Check battery and encoder power supply, reinitialize encoder |
| A.820 | Encoder Checksum Error | Encoder memory checksum is incorrect | Reinitialize encoder, replace motor if necessary |
| A.830 | Absolute Encoder Battery Error | Battery voltage too low | Check battery connection, replace battery |
| A.840 | Encoder Data Error | Incorrect data in encoder | Check wiring, EMC, and encoder |
| A.850 | Encoder Overspeed | Encoder was rotating too fast during power on | Reduce motor speed during power on, check encoder |
| A.860 | Encoder Overheat | Encoder internal temperature too high | Check ambient conditions, load, and encoder condition |
| A.8A0 | External Encoder Error | External encoder faulty | Check or replace external encoder |
| A.8A1 | External Encoder Module Error | Serial converter faulty | Replace serial converter |
| A.8A2 | External Encoder Sensor Error | Fault in external encoder | Replace encoder |
| A.8A3 | External Encoder Position Error | Position data from external encoder faulty | Check external encoder |
| A.b10 | Speed Reference A/D Error | A/D converter for speed reference faulty | Clear alarm, restart, replace SERVOPACK if necessary |
| A.b11 | Speed Reference A/D Data Error | A/D converter data for speed reference faulty | Clear alarm, restart, replace SERVOPACK if necessary |
| A.b20 | Torque Reference Input Read Error | A/D converter for torque reference faulty | Clear alarm, restart, replace SERVOPACK if necessary |
| A.b31 | Current Detection Error 1 | Current detection circuit phase U defective | Check or replace SERVOPACK |
| A.b32 | Current Detection Error 2 | Current detection circuit phase V defective | Check or replace SERVOPACK |
| A.b33 | Current Detection Error 3 | Current detection circuit defective | Check servomotor wiring, replace SERVOPACK if necessary |
| A.bF0 to A.bF4 | System Alarm 0 to 4 | Internal program or system fault in SERVOPACK | Power cycle, replace SERVOPACK if necessary |
| A.C10 | Loss of Servomotor Phase Detected | Motor out of control, U/V/W incorrect or encoder fault | Check motor wiring and encoder |
| A.C80 | Absolute Encoder Clear Error / Multiturn Limit Setting Error | Fault in absolute encoder or multiturn setting | Check encoder and settings |
| A.C90 | Encoder Connection Error | Communication between SERVOPACK and encoder not possible | Check connector, cable, impedance, ambient conditions, and EMC |
| A.C91 | Encoder Connection Position Data Error | Error while calculating encoder position data | Check cable, routing, shielding, and grounding |
| A.C92 | Encoder Connection Timer Error | Communication timer between encoder and SERVOPACK faulty | Check EMC, vibration, encoder, and SERVOPACK |
| A.CA0 | Encoder Parameter Error | Encoder parameters faulty | Check motor, encoder, or SERVOPACK |
| A.Cb0 | Encoder Feedback Error | Communication content with encoder faulty | Check cable, shielding, length, grounding, vibration, and encoder |
| A.CC0 | Multiturn Limit Mismatch | Encoder and SERVOPACK have different multiturn limits | Match Pn205 and encoder data |
| A.d00 | Position Error Overflow | Position error exceeds Pn520 threshold | Check U/V/W, command pulse frequency, acceleration, and parameters |
| A.d01 | Position Error Overflow Alarm at Servo ON | Position error too large at switching on | Clear position error, check Pn526 |
| A.d02 | Position Error Overflow Alarm Due to Speed Limit at Servo ON | Residual position error plus command pulses cause overflow | Clear position error, check Pn520/Pn529 |
| A.Eb1 | Safety Function Input Signal Timing Error | Time interval between /HWBB1 and /HWBB2 too large | Check input signals, wiring, and safety circuit |
| A.F10 | Open Phase in Power Line | One phase R/S/T too low for longer than 1 second | Check mains wiring, phase balance, and input supply |
| CPF00 | Digital Operator Communication Error 1 | Communication between digital operator and SERVOPACK faulty | Check connector, cable, and EMC |
| CPF01 | Digital Operator Communication Error 2 | Fault in digital operator or SERVOPACK | Reconnect digital operator, replace if necessary |