| 10 | Undervoltage (UV) | DC bus voltage below 200V | Check input voltage and phases | Stabilize power supply; replace unit |
| 12 | Memory Error (ME1) | Checksum error in ROM/RAM | Check repeatability after power cycle | Replace control board or complete unit |
| 13 | Software Process Error (SWE) | Data processing not completed in time | Check grounding and EMI influences | Noise suppression measures; replace unit |
| 17 | A/D Converter Error (ADE) | Current detection error during initialization | Hardware defect on control board | Replace unit |
| 21 | No Signal (NS) | Missing signal from spindle encoder | Check encoder cable and connectors | Replace cable; adjust or replace encoder |
| 23 | Excessive Speed Deflection (OSE) | Command/Actual diff > 50 rpm for 12s | Check motor wiring (U,V,W) and load | Adjust parameter SP055; reduce load |
| 24 | Ground Fault (PG) | Ground fault detected in motor cable | Insulation test of motor and cable | Replace defective cable or motor |
| 30 | Over-regeneration (ORG) | Regenerative resistor overloaded | Acceleration/deceleration duty cycle | Increase resistor capacity; extend cycle time |
| 31 | Overspeed (OS) | Speed > 115% of maximum speed | Check parameter SP017 and encoder polarity | Correct parameters; shield encoder cable |
| 32 | Power Module Error (PME) | Overcurrent in IPM module | Motor/cable short circuit; module defect | Repair power section or replace unit |
| 33 | Overvoltage (OV) | DC bus voltage > 400V | Check regenerative resistor and wiring (P, C) | Replace resistor; check mains voltage |
| 34 | NC Communication Error (CRC) | Data error in NC transmission | Check SH21 cable and terminator | Replace cable; improve grounding |
| 35 | NC Data Error (DE) | Invalid movement command from NC | Check NC program and parameters | Check NC controller |
| 36 | Transmission Error (TE) | Cyclic transmission interrupted | Check communication cable for breaks | Replace cable |
| 37 | Parameter Error (PE) | Invalid spindle parameters | Check parameter list on NC | Set correct values according to motor type |
| 38 | Protocol Error 1 (TP1) | Communication error with NC | Check wiring and EMI | Replace cable |
| 39 | Protocol Error 2 (TP2) | Information error in communication | Check NC interface card | Hardware check NC/Drive |
| 3B | Power Module Overheat (PMOH) | IPM temperature too high | Fan function and heatsink cleanliness | Clean/replace fan; improve ventilation |
| 42 | Feedback Error PLG (PLE) | Pulse error at PLG sensor | Check sensor gap and shielding | Clean or replace sensor |
| 46 | Motor Overheat (OHM) | Motor thermal protector tripped | Check motor load and cooling fan | Allow cooling time; reduce load |
| 50 | Overload (OL) | Current above OLL limit for OLT time | Mechanical blockage or stiffness | Adjust cutting conditions; check mechanics |
| 52 | Excessive Error (OD) | Position deviation too large | Check position loop gain and mechanics | Optimize parameters SP001/SP002 |
| 5C | Orientation Feedback Error (ORF) | Deviation after orientation too large | Check parameter SP114 and load torque | Readjust controller parameters |
| 88 | Watchdog (WD) | Control software system crash | Hardware defect of CPU board | Replace unit |
| E0 | Over-regeneration Warning (WOR) | 80% of regeneration capacity reached | Frequency of braking operations | Adjust cycle time |
| E1 | Overload Warning (WOL) | 80% of overload time reached | Check motor current consumption | Reduce load |
| E4 | Parameter Warning (WPE) | Parameter outside allowable range | Check recently changed parameters | Correct values |
| E7 | NC Emergency Stop (NCE) | Emergency stop signal from NC active | Check E-stop chain and other axes | Resolve E-stop cause |