Yaskawa Servopack Fault Codes are diagnostic error codes used in Yaskawa motor drives to help identify and troubleshoot issues. These codes give an indication of specific problems within the drive system, making it easier to isolate and fix faults. When a fault occurs, the system will display a corresponding code, and operators must interpret these codes to understand the underlying issue.
| AlarmNumber | Alarm Name | Meaning | Servo- motor Stopping Method | AlarmReset |
| A.020 | Parameter ChecksumError 1 | The data of the parameter in the SERVOPACK is incorrect. | Gr.1 | N/A |
| A.021 | Parameter Format Error 1 | The data of the parameter in the SERVOPACK is incorrect. | Gr.1 | N/A |
| A.022 | System Checksum Error 1 | The data of the parameter in the SERVOPACK is incorrect. | Gr.1 | N/A |
| A.030 | Main Circuit Detector Error | Detection data for main circuit is incorrect. | Gr.1 | Available |
| A.040 | Parameter Setting Error 1 | The parameter setting is outside the setting range. | Gr.1 | N/A |
| A.041 | Encoder Output PulseSetting Error | The encoder output pulse (Pn212) is outside the setting range or does not satisfy the setting conditions. | Gr.1 | N/A |
| A.042 | Parameter CombinationError | Combination of some parameters exceeds the setting range. | Gr.1 | N/A |
| A.044 | Semi-closed/Fully-closed Loop Control Parameter Setting Error | The settings of the option module and Pn00B.3, Pn002.3 do not match. | Gr.1 | N/A |
| A.04A | Parameter Setting Error 2 | Bank member/bank data setting is incorrect. | Gr.1 | N/A |
| A.050 | Combination Error | The SERVOPACK and the servomotor capacities do not match each other. | Gr.1 | Available |
| A.051 | Unsupported Device Alarm | The device unsupported was connected. | Gr.1 | N/A |
| A.0b0 | Cancelled Servo ON Command Alarm | After executing the utility function to turn ON the power to the motor, the servo ON command (SV_ON) was sent from the host controller. | Gr.1 | Available |
| A.100 | Overcurrent or Heat SinkOverheated | An overcurrent flowed through the IGBT or the heat sink of the SERVOPACK was overheated. | Gr.1 | N/A |
| A.300 | Regeneration Error | Regenerative circuit or regenerative resistor is faulty. | Gr.1 | Available |
| A.320 | Regenerative Overload | Regenerative energy exceeds regenerative resistor capacity. | Gr.2 | Available |
| A.330 | Main Circuit PowerSupply Wiring Error | • Setting of AC input/DC input is incorrect.• Power supply wiring is incorrect. | Gr.1 | Available |
| A.400 | Overvoltage | Main circuit DC voltage is excessively high. | Gr.1 | Available |
| A.410 | Undervoltage | Main circuit DC voltage is excessively low. | Gr.2 | Available |
| A.450 | Main-CircuitCapacitor Overvoltage | The capacitor of the main circuit has deteriorated or is faulty. | Gr.1 | N/A |
| A.510 | Overspeed | The servomotor speed is above the maximum rota- tional speed. | Gr.1 | Available |
| A.511 | Overspeed of EncoderOutput Pulse Rate | The pulse output speed upper limit of the set encoder output pulse (Pn212) is exceeded. | Gr.1 | Available |
| A.520 | Vibration Alarm | Incorrect vibration at the motor speed was detected. | Gr.1 | Available |
| A.521 | Autotuning Alarm | Vibration was detected while performing tuning-less function. | Gr.1 | Available |
| A.710 | Overload: High Load | The motor was operating for several seconds to several tens of seconds under a torque largely exceeding rat- ings. | Gr.2 | Available |
| A.720 | Overload: Low Load | The motor was operating continuously under a torque exceeding ratings. | Gr.1 | Available |
| A.730A.731 | Dynamic Brake Overload | When the dynamic brake was applied, rotational energy exceeded the capacity of dynamic brake resis- tor. | Gr.1 | Available |
| A.740 | Overload of SurgeCurrent Limit Resistor | The main circuit power was frequently turned ON andOFF. | Gr.1 | Available |
| A.7A0 | Heat Sink Overheated | The heat sink of the SERVOPACK exceeded 100°C. | Gr.2 | Available |
| A.7AB | Built-in Fan inSERVOPACK Stopped | The fan inside the SERVOPACK stopped. | Gr.1 | Available |
| A.810 | Encoder Backup Error | The power supplies to the encoder all failed and posi- tion data was lost. | Gr.1 | N/A |
| A.820 | Encoder Checksum Error | The checksum results of encoder memory is incorrect. | Gr.1 | N/A |
| A.830 | Absolute Encoder BatteryError | The battery voltage was lower than the specified value after the control power supply was turned ON. | Gr.1 | Available |
| A.840 | Encoder Data Error | Data in the encoder is incorrect. | Gr.1 | N/A |
| A.850 | Encoder Overspeed | The encoder was rotating at high speed when the power was turned ON. | Gr.1 | N/A |
| A.860 | Encoder Overheated | The internal temperature of encoder is too high. | Gr.1 | N/A |
| A.8A0* | External Encoder Error | External encoder is faulty. | Gr.1 | Available |
| A.8A1* | External Encoder Error ofModule | Serial converter unit is faulty. | Gr.1 | Available |
| A.8A2* | External Encoder Error ofSensor | External encoder is faulty. | Gr.1 | Available |
| A.8A3* | External Encoder Error ofPosition | The position data of external encoder is faulty. | Gr.1 | Available |
| A.8A5* | External EncoderOverspeed | The overspeed from the external encoder occurred. | Gr.1 | Available |
| A.8A6* | External EncoderOverheated | The overheat from the external encoder occurred. | Gr.1 | Available |
| A.b31 | Current Detection Error 1 | The current detection circuit for phase U is faulty. | Gr.1 | N/A |
| A.b32 | Current Detection Error 2 | The current detection circuit for phase V is faulty. | Gr.1 | N/A |
| A.b33 | Current Detection Error 3 | The detection circuit for the current is faulty. | Gr.1 | N/A |
| A.b6A | MECHATROLINK Communications ASIC Error 1 | ASIC error occurred in the MECHATROLINK com- munications. | Gr.1 | N/A |
| A.bF0 | System Alarm 0 | "Internal program error 0" of the SERVOPACKoccurred. | Gr.1 | N/A |
| A.bF1 | System Alarm 1 | "Internal program error 1" of the SERVOPACKoccurred. | Gr.1 | N/A |
| A.bF2 | System Alarm 2 | "Internal program error 2" of the SERVOPACKoccurred. | Gr.1 | N/A |
| A.bF3 | System Alarm 3 | "Internal program error 3" of the SERVOPACKoccurred. | Gr.1 | N/A |
| A.bF4 | System Alarm 4 | "Internal program error 4" of the SERVOPACKoccurred. | Gr.1 | N/A |
| A.C10 | Servo Overrun Detected | The servomotor ran out of control. | Gr.1 | Available |
| A.C80 | Absolute Encoder Clear Error and Multiturn Limit Setting Error | The multiturn for the absolute encoder was not prop- erly cleared or set. | Gr.1 | N/A |
| A.C90 | Encoder CommunicationsError | Communications between the SERVOPACK and the encoder is not possible. | Gr.1 | N/A |
| A.C91 | Encoder CommunicationsPosition Data Error | An encoder position data calculation error occurred. | Gr.1 | N/A |
| A.C92 | Encoder CommunicationsTimer Error | An error occurs in the communications timer between the encoder and the SERVOPACK. | Gr.1 | N/A |
| A.CA0 | Encoder Parameter Error | Encoder parameters are faulty. | Gr.1 | N/A |
| A.Cb0 | Encoder Echoback Error | Contents of communications with encoder are incor- rect. | Gr.1 | N/A |
| A.CC0 | Multiturn LimitDisagreement | Different multiturn limits have been set in the encoder and the SERVOPACK. | Gr.1 | N/A |
| A.CF1* | Feedback Option Module Communications Error (Reception error) | Reception from the Feedback Option Module is faulty. | Gr.1 | N/A |
| A.CF2* | Feedback Option Module Communications Error (Timer stop) | Timer for communications with the Feedback OptionModule is faulty. | Gr.1 | N/A |
| A.d00 | Position Error Overflow | Position errors exceeded parameter Pn520. | Gr.1 | Available |
| A.d01 | Position Error OverflowAlarm at Servo ON | This alarm occurs if the SV_ON command is received when the position error is greater than the set value of Pn526 while the servomotor power is OFF. | Gr.1 | Available |
| A.d02 | Position Error Overflow Alarm by Speed Limit at Servo ON | When the position error remain in the error counter, Pn529 limits the speed if the SV_ON command is received. If Pn529 limits the speed in such a state, this alarm occurs when position references are input and the number of position errors exceeds the value set for the excessive position error alarm level (Pn520). | Gr.2 | Available |
| A.d10* | Motor-load Position ErrorOverflow | During fully-closed loop control, the position error between motor and load is excessive. | Gr.2 | Available |
| A.E02 | MECHATROLINK-II Internal Synchronization Error 1 | Synchronization error during MECHATROLINK-IIcommunications with the SERVOPACK. | Gr.1 | Available |
| A.E40 | MECHATROLINK-II Transmission Cycle Setting Error | The setting of the MECHATROLINK-II transmission cycle is out of the allowable range. | Gr.2 | Available |
| A.E50 | MECHATROLINK-IISynchronization Error | A synchronization error occurs during MECHA- TROLINK-II communications. | Gr.2 | Available |
| A.E51 | MECHATROLINK-IISynchronization Failed | A synchronization failure occurs in MECHA- TROLINK-II communications. | Gr.2 | Available |
| A.E60 | MECHATROLINK-II Communications Error (Reception error) | A communications error occurs continuously duringMECHATROLINK-II communications. | Gr.2 | Available |
| A.E61 | MECHATROLINK-II Transmission Cycle Error (Synchronization interval error) | The transmission cycle fluctuates during MECHA- TROLINK-II communications. | Gr.2 | Available |
| A.E72∗ | Feedback Option Module | Detection of the Feedback Option Module failed. | Gr.1 | N/A |
| A.EA2 | DRV Alarm 2 (SERVOPACK WDT error) | A SERVOPACK DRV alarm 0 occurs. | Gr.2 | Available |
| A.Eb1 | Safety Function SignalInput Timing Error | The safety function signal input timing is faulty. | Gr.1 | N/A |
| A.ED1 | Command ExecutionTimeout | A timeout error occurred when using a MECHA- TROLINK command. | Gr.2 | Available |
| A.F10 | Main Circuit Cable OpenPhase | With the main power supply ON, voltage was low for more than 1 second in phase R, S, or T. | Gr.2 | Available |
| CPF00 | Digital OperatorTransmission Error 1 | Digital operator (JUSP-OP05A-1-E) fails to communi- cate with the SERVOPACK (e.g., CPU error). | − | N/A |
| CPF01 | Digital OperatorTransmission Error 2 | − | N/A | |
| A.− − | Not an error | Normal operation status | − | − |
