Yaskawa U1000 Drive

Yaskawa U1000 Drive Fault Code List:

Fault Codes	Cause & Solution
Aov Power Supply Overvoltage	Cause: The input power supply voltage became equal to or higher than the Input Power Supply Overvoltage Detection Level. – 200 V Class: Approximately 277 Vrms – 400 V Class: Approximately 630 Vrms – The power supply voltage exceeded the range listed in drive input power specifications. – Regenerative operation was performed when the power supply capacity was too small. – The power supply circuit opened during regeneration. Solution: – Reduce the voltage to within the range in the power supply specifications. – Increase the capacity of the power supply.
AUv Power Supply Undervoltage	Cause: The input power supply voltage became equal to or lower than the Input Power Supply Undervoltage Detection Level (L2-21). – 200 V Class: Approximately 150 Vrms – 400 V Class: Approximately 300 Vrms Solution: 1. The capacity of the power supply is too small. – Increase the capacity of the power supply. 2. The distortion in the power supply is too large. – Lower the impedance of the input power supply wiring 3. A phase loss occurred in the input power supply. – Check the input power supply for phase loss or an imbalance in the interphase voltages. Investigate and correct the cause and then reset the fault. 4. The built-in fuse is open. – An internal transistor was destroyed. – The input wiring is grounded or short-circuited. – The output transistor has failed because the drive output has grounded or short-circuited. – Replace the board or the drive.
bUS Option Communication Error	Cause & Solution: 1. The drive did not receive a signal from the controller. The communications cable wiring is incorrect. – Correct wiring errors. 2. There is a short-circuit in the communications cable or the communications cable is not connected. – Repair short circuits and connect cables. – Replace the defective communications cable. 3. Electrical interference caused a communication data error. – Examine the control circuit lines, main circuit lines, and ground wiring, and decrease the effects of electrical interference. – Make sure that a magnetic contactor is not the source of the electrical interference, then use a Surge Protective Device if necessary. – Use only the recommended cables or other shielded line. Ground the shield on the controller side or the drive input power side. – Separate the communication wiring from drive power lines, and install a noise filter to the input side of the power supply for communication. – Decrease the effects of electrical interference from the controller. 4. The option is incorrectly installed to the drive. – Correctly install the option to the drive. 5. The option is damaged. – If the fault continues and the wiring is correct, replace the option.
CE Modbus Communication Error	Cause & Solution: Control data was not received for the CE detection time set to H5-09. 1. The communications cable wiring is incorrect. – Correct wiring errors. 2. There is a short circuit in the communications cable or the communications cable is not connected. – Repair short circuits and connect cables. – Replace the defective communications cable. 3. Electrical interference caused a communication data error. – Examine the control circuit lines, main circuit lines, and ground wiring, and decrease the effects of electrical interference. – Make sure that a magnetic contactor is not the source of the electrical interference, then use a Surge Protective Device if necessary. – Use only the recommended cables or other shielded line. Ground the shield on the controller side or the drive input power side. – Separate the communication wiring from drive power lines, and install a noise filter to the input side of the power supply for communication. – Decrease the effects of electrical interference from the controller.
CF Control Fault	Cause: The torque limit was reached continuously for 3 seconds after the Stop command was input and deceleration was not possible in Open Loop Vector Control. Solution: 1. Motor parameters are set improperly – Check the motor parameter settings and repeat Auto-Tuning. 2. Torque limit is too low – Set the torque limit to the most appropriate setting (L7-01 through L7-04). 3. Load inertia is too big – Adjust the deceleration time (C1-02, C1-04, C1-06, C1-08). – Set the frequency to the minimum value and interrupt the Run command when the drive finishes decelerating.
CoF Current Offset Fault	Cause & Solution: The current sensor is damaged or there was residual induction current in the motor (e.g., during sudden deceleration or when coasting) when the drive attempted to start the motor. 1. Due to residual induction current in the motor when the drive attempted to start the motor, the drive attempted to adjust the current offset value beyond the allowable range. – Create a motor restart sequence that allows enough time for the residual induction voltage to dissipate. – Enable Speed Search at start (b3-01 = 1). Use the multi-function terminals to execute External Speed Search 1 and 2 (H1- = 61 or 62). Note: When using a PM motor, both External Speed Search 1 and 2 perform the same operation. 2. Hardware is damaged. – Replace the drive.
CPF00 Control Circuit Error	Cause: A drive hardware problem occurred. Solution: – Re-energize the drive. – If the fault stays, replace the control board or the drive.
CPF01 Control Circuit Error	Cause: A drive hardware problem occurred. Solution: – Re-energize the drive. – If the fault stays, replace the control board or the drive.
CPF02 Control Circuit Error	Cause: A drive hardware problem occurred. Solution: – Re-energize the drive. – If the fault stays, replace the control board or the drive.
CPF03 Control Circuit Error	Cause: A drive hardware problem occurred. Solution: – Re-energize the drive. – If the fault stays, replace the control board or the drive.
CPF07 Control Circuit Error	Cause: A drive hardware problem occurred. Solution: – Re-energize the drive. – If the fault stays, replace the control board or the drive.
CPF08 Control Circuit Error	Cause: A drive hardware problem occurred. Solution: – Re-energize the drive. – If the fault stays, replace the control board or the drive.
CPF11 Control Circuit Error	Cause: A drive hardware problem occurred. Solution: – Re-energize the drive. – If the fault stays, replace the control board or the drive.
CPF12 Control Circuit Error	Cause: A drive hardware problem occurred. Solution: – Re-energize the drive. – If the fault stays, replace the control board or the drive.
CPF13 Control Circuit Error	Cause: A drive hardware problem occurred. Solution: – Re-energize the drive. – If the fault stays, replace the control board or the drive.
CPF14 Control Circuit Error	Cause: A drive hardware problem occurred. Solution: – Re-energize the drive. – If the fault stays, replace the control board or the drive.
CPF16 Control Circuit Error	Cause: A drive hardware problem occurred. Solution: – Re-energize the drive. – If the fault stays, replace the control board or the drive.
CPF17 Control Circuit Error	Cause: A drive hardware problem occurred. Solution: – Re-energize the drive. – If the fault stays, replace the control board or the drive.
CPF18 Control Circuit Error	Cause: A drive hardware problem occurred. Solution: – Re-energize the drive. – If the fault stays, replace the control board or the drive.
CPF19 Control Circuit Error	Cause: A drive hardware problem occurred. Solution: – Re-energize the drive. – If the fault stays, replace the control board or the drive.
CPF20 Control Circuit Error	Cause: A drive hardware problem occurred. Solution: – Re-energize the drive. – If the fault stays, replace the control board or the drive.
CPF21 Control Circuit Error	Cause: A drive hardware problem occurred. Solution: – Re-energize the drive. – If the fault stays, replace the control board or the drive.
CPF22 Control Circuit Error	Cause: A drive hardware problem occurred. Solution: – Re-energize the drive. – If the fault stays, replace the control board or the drive.
CPF23 Control Circuit Error	Cause: A drive hardware problem occurred. Solution: – Re-energize the drive. – If the fault stays, replace the control board or the drive.
CPF24 Control Circuit Error	Cause: A drive hardware problem occurred. Solution: – Re-energize the drive. – If the fault stays, replace the control board or the drive.
CPF26 Control Circuit Error	Cause: A drive hardware problem occurred. Solution: – Re-energize the drive. – If the fault stays, replace the control board or the drive.
CPF27 Control Circuit Error	Cause: A drive hardware problem occurred. Solution: – Re-energize the drive. – If the fault stays, replace the control board or the drive.
CPF28 Control Circuit Error	Cause: A drive hardware problem occurred. Solution: – Re-energize the drive. – If the fault stays, replace the control board or the drive.
CPF29 Control Circuit Error	Cause: A drive hardware problem occurred. Solution: – Re-energize the drive. – If the fault stays, replace the control board or the drive.
CPF30 Control Circuit Error	Cause: A drive hardware problem occurred. Solution: – Re-energize the drive. – If the fault stays, replace the control board or the drive.
CPF31 Control Circuit Error	Cause: A drive hardware problem occurred. Solution: – Re-energize the drive. – If the fault stays, replace the control board or the drive.
CPF32 Control Circuit Error	Cause: A drive hardware problem occurred. Solution: – Re-energize the drive. – If the fault stays, replace the control board or the drive.
CPF33 Control Circuit Error	Cause: A drive hardware problem occurred. Solution: – Re-energize the drive. – If the fault stays, replace the control board or the drive.
CPF34 Control Circuit Error	Cause: A drive hardware problem occurred. Solution: – Re-energize the drive. – If the fault stays, replace the control board or the drive.
CPF35 Control Circuit Error	Cause: A drive hardware problem occurred. Solution: – Re-energize the drive. – If the fault stays, replace the control board or the drive.
CPF40 Control Circuit Error	Cause: A drive hardware problem occurred. Solution: – Re-energize the drive. – If the fault stays, replace the control board or the drive.
CPF41 Control Circuit Error	Cause: A drive hardware problem occurred. Solution: – Re-energize the drive. – If the fault stays, replace the control board or the drive.
CPF42 Control Circuit Error	Cause: A drive hardware problem occurred. Solution: – Re-energize the drive. – If the fault stays, replace the control board or the drive.
CPF43 Control Circuit Error	Cause: A drive hardware problem occurred. Solution: – Re-energize the drive. – If the fault stays, replace the control board or the drive.
CPF44 Control Circuit Error	Cause: A drive hardware problem occurred. Solution: – Re-energize the drive. – If the fault stays, replace the control board or the drive.
CPF45 Control Circuit Error	Cause: A drive hardware problem occurred. Solution: – Re-energize the drive. – If the fault stays, replace the control board or the drive.
CPF06 Control Circuit Error	Cause: There is an error in the data saved to EEPROM. Solution: 1. The power supply was switched off when parameters were being saved to the drive. – Reinitialize the drive (A1-03 = 2220, 3330). 2. Hardware is damaged. – Turn the power off and check the connection between the control board and the drive. – If the problem continues, replace either the control board or the entire drive.
CPF25 Terminal Board not Connected	Cause: Terminal board is not connected correctly. Solution: Reconnect the terminal board to the connector on the drive, then cycle the power to the drive.
dEv Speed Deviation	Cause & Solution: The deviation between the speed detection value for the pulse input and the speed reference after speed agreement was reached exceeded the setting value of F1-10 for the time set in F1-11 or longer when the Operation Selection at Deviation was set to continue operation (F1-04 = 3). 1. The load is too heavy. – Decrease the load. 2. Acceleration and deceleration times are set too short. – Increase the values set in C1-01 to C1-08 [Acceleration/ Deceleration Time]. 3. The dEv detection level settings are incorrect. – Adjust F1-10 [Speed Deviation Detection Level] and F1-11 [Speed Deviation Detect DelayTime]. 4. The load is locked up. – Examine the machine. 5. The holding brake is stopping the motor. – Release the holding brake.
doH Damping Resistor Overheat	Cause: The temperature of the built-in damping resistor exceeded the set value. Solution: 1. The capacity of the power supply is too small. The distortion in the power supply is too large. – Increase the capacity of the power supply. – Lower the impedance of the input power supply wiring. 2. A phase loss occurred in the input power supply. Check the input power supply for phase loss or an imbalance in the interphase voltages.
dv1 Z Pulse Fault	Cause: – PG encoder is disconnected, improperly wired, or the PG option card or PG encoder are damaged – The motor turned one full rotation without the Z Pulse being detected. Solution: 1. Make sure the PG encoder is properly connected and all shielded lines are properly grounded. 2. Re-energize the drive 3. If the fault stays, replace the control board or the drive.
dv2 Z Pulse Noise Fault	Cause & Solution: The Z pulse is out of phase by more than 5 degrees for the number of times specified in parameter F1-17. 1. Detection Noise interference along the encoder cable. – Isolate the encoder cable from the drive output line or a different source of electrical interference. 2. The encoder cable is disconnected or wired incorrectly. – Examine for wiring errors or disconnected wires in the encoder cable, and repair problems. Correctly ground the shielded wire of the encoder cable. 3. The PG option or the encoder on the motor side is damaged. – Repair the wiring and re-energize the drive, then replace the PG option or the encoder if the problem continues.
dv3 Inversion Detection	Cause: The torque reference and acceleration are in opposite directions from one another (one is in reverse and the other is forward) while at the same time the speed reference and actual motor speed differ by over 30% for the number of pulses set to F1-18. Solution: 1. The Z pulse offset is not set properly to E5-11. – Set the value for Δθ to E5-11 as specified on the motor nameplate. Replacing the PG encoder or changing the application so that the motor rotates in reverse instead requires readjustment of the Z pulse offset. (T2-01 = 3) 2. An external force on the load side has caused the motor to move. – Make sure the motor is rotating in the right direction. – Look for any problems on the load side that might be causing the motor to rotate in the opposite direction. 3. Electrical signal interference along the PG cable affecting the A or B pulse. – Rewire the PG encoder and make sure all lines including shielded line are properly connected. 4. Rotational direction for the PG encoder set to F1-05 is the opposite of the order of the motor lines. – Make sure motor lines for each phase (U, V, W) are connected properly.
dv4 Inversion Prevention Detection	Cause: Pulses indicate that the motor is rotating in the opposite direction of the speed reference. Set the number of pulses to trigger inverse detection to F1-19. Solution: 1. The Z Pulse offset is not set properly to E5-11 – Set the value for Δθ to E5-11 as specified on the motor nameplate. – If the problem continues after cycling power, replace the PG option card or the PG encoder. Replacing the PG encoder or changing the application to rotate the motor in reverse requires readjustment of the Z-pulse offset. (T2-01 = 3) 2. Electrical signal interference along the PG cable affecting the A or B pulse – Make sure the motor is rotating in the proper direction. – Identify and fix any problems on the load side causing the motor to rotate in the opposite direction. 3. PG encoder is disconnected, improperly wired, or the PG option card or PG encoder are damaged – Rewire the PG encoder and properly connect all lines including shielded line. – If the problem continues after cycling power, replace the PG option card or the PG encoder.
dv7 Polarity Judge Timeout	Cause & Solution: 1. There is a disconnection in the motor coil winding. – Measure the motor line-to-line resistance and replace the motor if a coil is disconnected. 2. The screws on the drive output terminals are loose. – Tighten the terminal screws to the correct tightening torque.
dWAL DriveWorksEZ Alarm	Cause: There was an error in the DriveWorksEZ program. Solution: Examine the DriveWorksEZ program and remove the cause of the error. This is not a drive fault.
dWFL DriveWorksEZ Alarm	Cause: There was an error in the DriveWorksEZ program. Solution: Examine the DriveWorksEZ program and remove the cause of the error. This is not a drive fault.
dWF1 EEPROM Memory DWEZ Data Error	Cause & Solution: There is an error in the DriveWorksEZ program saved to EEPROM. 1. There is an error in the EEPROM peripheral circuit. – Re-energize the drive. – If the fault stays, replace the control board or the drive. For information about replacing the control board, contact Yaskawa or your nearest sales representative. 2. There is a problem with the EEPROM data. – Set A1-03 = 2220, 3330 [Initialize Parameters = 2-Wire Initialization, 3-Wire Initialization] to initialize the drive, then upload the DriveWorksEZ project to the drive again.
E5 MECHATROLINK Watchdog Timer Error	Cause: The drive detected a watchdog circuit exception while it received data from the controller. The watchdog has timed out. Solution: Data has not been received from the PLC – Execute DISCONNECT or ALM_CLR, then issue a CONNECT command or SYNC_SET command and proceed to phase 3.
EF0 Option Card External Fault	Cause & Solution: An external fault condition is present. 1. An external fault was received from the PLC with other than F6-03 = 3 “alarm only” (the drive continued to run after external fault). – Remove the cause of the external fault. – Remove the external fault input from the PLC. 2. Problem with the PLC program. – Check the PLC program and correct problems.
EF1 External Fault (Terminal S1)	Cause & Solution: 1. MFDI terminal S1 caused an external fault through an external device. -Find the device that caused the external fault and remove the cause. -Clear the external fault input in the MFDI. 2. The wiring is incorrect. – Correctly connect the signal line to MFDI terminal S1. 3. External Fault [H1-01 = 20 to 2B] is set to MFDI terminal S1, but the terminal is not in use. – Correctly set the MFDI.
EF2 External Fault (Terminal S2)	Cause & Solution: 1. MFDI terminal S2 caused an external fault through an external device. – Find the device that caused the external fault and remove the cause. – Clear the external. 2. The wiring is incorrect. – Correctly connect the signal line to MFDI terminal S2. 3. External Fault [H1-02 = 20 to 2B] is set to MFDI terminal S2, but the terminal is not in use. – Correctly set the MFDI.
EF3 External Fault (Terminal S3)	Cause & Solution: 1. MFDI terminal S3 caused an external fault through an external device. – Find the device that caused the external fault and remove the cause. – Clear the external. 2. The wiring is incorrect. – Correctly connect the signal line to MFDI terminal S3. 3. External Fault [H1-03 = 20 to 2B] is set to MFDI terminal S3, but the terminal is not in use. – Correctly set the MFDI.
EF4 External Fault (Terminal S4)	Cause & Solution: 1. MFDI terminal S4 caused an external fault through an external device. – Find the device that caused the external fault and remove the cause. – Clear the external. 2. The wiring is incorrect. – Correctly connect the signal line to MFDI terminal S4. 3. External Fault [H1-04 = 20 to 2B] is set to MFDI terminal S4, but the terminal is not in use. – Correctly set the MFDI.
EF5 External Fault (Terminal S5)	Cause & Solution: 1. MFDI terminal S5 caused an external fault through an external device. – Find the device that caused the external fault and remove the cause. – Clear the external. 2. The wiring is incorrect. – Correctly connect the signal line to MFDI terminal S5. 3. External Fault [H1-05 = 20 to 2B] is set to MFDI terminal S5, but the terminal is not in use. – Correctly set the MFDI.
EF6 External Fault (Terminal S6)	Cause & Solution: 1. MFDI terminal S6 caused an external fault through an external device. – Find the device that caused the external fault and remove the cause. – Clear the external. 2. The wiring is incorrect. – Correctly connect the signal line to MFDI terminal S6. 3. External Fault [H1-06 = 20 to 2B] is set to MFDI terminal S6, but the terminal is not in use. – Correctly set the MFDI.
EF7 External Fault (Terminal S7)	Cause & Solution: 1. MFDI terminal S7 caused an external fault through an external device. – Find the device that caused the external fault and remove the cause. – Clear the external. 2. The wiring is incorrect. – Correctly connect the signal line to MFDI terminal S7. 3. External Fault [H1-07 = 20 to 2B] is set to MFDI terminal S7, but the terminal is not in use. – Correctly set the MFDI.
EF8 External Fault (Terminal S8)	Cause & Solution: 1. MFDI terminal S8 caused an external fault through an external device. – Find the device that caused the external fault and remove the cause. – Clear the external. 2. The wiring is incorrect. – Correctly connect the signal line to MFDI terminal S8. 3. External Fault [H1-08 = 20 to 2B] is set to MFDI terminal S8, but the terminal is not in use. – Correctly set the MFDI.
Err EEPROM Write Error	Cause & Solution: Data cannot be written to the EEPROM. 1. There was a problem with the EEPROM hardware. – Re-energize the drive. – If the fault stays, replace the control board or the drive. 2. Electrical interference corrupted the data while it was writing to the EEPROM of the drive. – Push ENTER Key. – Set the parameters again.
FAn Fan Fault	Cause: Fan failed. Solution: 1. Internal cooling fan has malfunctioned – Cycle power to the drive. – Check for fan operation. – Verify the cumulative operation time of the fan with monitor U4-03, and verify the cumulative operation time of the fan maintenance timer with U4 04. – If the cooling fan has exceeded its expected performance life or is damaged in any other way, replace the fan. 2. Fault detected in the internal cooling fan or magnetic contactor to the power supply. – Cycle power to the drive. – If the fault continues to occur, replace the power board/gate drive board or the entire drive.
FbH Excessive PID Feedback	Cause & Solution: PID feedback input is greater than the level set to b5-36 for longer than the time set to b5-37. Set b5-12 to 2 or 5 to enable fault detection. 1. The FbH detection level is set incorrectly. – Check b5-36 and b5-37 settings. 2. There is a problem with the PID feedback wiring. – Correct errors with the PID control wiring. 3. The feedback sensor is not operating correctly. – Examine the sensors on the control device side. 4. A fault occurred in the feedback input circuit of the drive. – Replace the control board or the drive.
FbL PID Feedback Loss	Cause & Solution: PID feedback loss detection is programmed to trigger a fault (b5-12 = 2 or 5) and the PID feedback level is below the detection level set to b5-13 for longer than the time set to b5-14. 1. The FbL detection level is set incorrectly. – Check b5-13 and b5-14 settings. 2. There is a problem with the PID feedback wiring. – Correct errors with the PID control wiring. 3. The feedback sensor is not operating correctly. – Examine the sensors on the control device side. 4. A fault occurred in the feedback input circuit of the drive. – Replace the control board or the drive.
Fdv Power Supply Frequency Fault	Cause: The input power supply frequency exceeded the allowable frequency fluctuation. Solution: 1. A momentary power loss occurred. – Reset the fault. 2. An input power supply wiring terminal is loose. – Check for loose terminals. 3. The fluctuation in the voltage of the input power supply is too large. Increase the power supply frequency fault detection width (L2-27). 4. The built-in fuse is open. Replace either the control board or the entire drive.
GF Ground Fault	Cause & Solution: A current short to ground exceeded 50% of rated current on the output side of the drive. 1. Overheating caused damage to the motor or the motor insulation is not satisfactory. – Measure the motor insulation resistance, and replace the motor if there is electrical conduction or unserviceable insulation. 2. The motor main circuit cable is contacting ground to make a short circuit. – Examine the motor main circuit cable for damage, and repair short circuits. – Measure the resistance between the motor main circuit cable and the ground terminal. If there is electrical conduction, replace the cable. 3. An increase in the stray capacitance of the cable and the ground terminal caused an increase in the leakage current.- Decrease the stray capacitance 4. There was a problem with the drive hardware. – Replace the control board or the drive.
LF Output Phase Loss	Cause & Solution: Phase loss on the output side of the drive. Setting L8-07 to 1 or 2 enables Phase Loss Detection. 1. The motor main circuit cable is disconnected. – Connect motor main circuit cable wiring. Correct wiring errors in the main circuit drive input power. 2. There is a disconnection in the motor coil winding. – If a coil is disconnected, measure the motor Line-to-Line Resistance and replace the motor. 3. The screws on the drive output terminals are loose. – Tighten the terminal screws to the correct tightening torque. 4. The rated output current of the motor is less than 5% of the drive rated current. – Examine the drive capacity or the motor output to be applied. 5. You are trying to use a single-phase motor. – The drive cannot operate a single-phase motor. 6. The output transistor in the drive is damaged. – Re-energize the drive. – If the fault stays, replace the control board or the drive.
LF2 Output Current Imbalance	Cause & Solution: One or more of the phases in the output current are lost. 1. There is phase loss in the wiring on the output side of the drive. – Examine for wiring errors or disconnected wires on the output side of the drive, and repair problems. 2. The screws on the drive output terminals are loose. – Tighten the terminal screws to a correct tightening torque. 3. The output circuit is damaged. – Replace either the control board or the entire drive. 4. The drive output circuit is broken. – Re-energize the drive.
LSo LSo Fault	Cause: Pull-out has been detected at low speed. Solution: 1. The incorrect motor code has been entered. – Enter the correct motor code for the PM motor being used into E5-01. – For special-purpose motors, enter the correct data to all E5 parameters according to the test report provided for the motor. 2. The load is too heavy. – Reduce the load. – Use a larger drive. 3. The drive incorrectly detected the position of the motor poles. – Make sure some external force is not rotating the motor at start. – Enable Speed Search Selection at start. (b3-01 = 1). – If the value displayed in U6-57 is lower than 819, then set the polarity judge current (n8-84) higher than the default value. 4. Values set to parameters L8-93, L8-94, and L8-95 are incorrect. – Increase the value set to L8-93. – Increase the value set to L8-94. – Increase the value set to L8-95.
nSE Node Setup Error	Cause: A terminal assigned to the node setup function closed during run. Solution: 1. Overcurrent occurred during Overexcitation Deceleration. 2. The node setup terminal closed during run. – Stop the drive when using the node setup function.
oC Overcurrent	Cause & Solution: 1. The load is too heavy. – Measure the current flowing into the motor. – Replace the drive with a larger capacity model if the current value is more than the drive rated current. – Decrease the load or replace with a larger drive to prevent sudden changes in the current level. 2. Overheating caused damage to the motor or the motor insulation is not satisfactory. – Measure the motor insulation resistance, and replace the motor if there is electrical conduction or unserviceable insulation. 3. The motor main circuit cable is contacting ground to make a short circuit. – Examine the motor main circuit cable for damage, and repair short circuits. – Measure the resistance between the motor main circuit cable and the ground terminal. If there is electrical conduction, replace the cable. 4. A short circuit or ground fault on the drive output side caused damage to the output transistor of the drive. – Make sure that there is not a short circuit in terminal B1 and terminals U/T1, V/T2, and W/T3. Make sure that there is not a short circuit in terminals – and terminals U/T1, V/T2, and W/T3. – If there is a short circuit, 5. The acceleration time is too short. – Calculate the torque needed during acceleration relative to the load inertia and the specified acceleration time. If it is not possible to set the proper amount of torque, make the following changes: – Increase the acceleration time (C1-01, C1-03, C1-05, C1-07) – Increase the S-curve characteristics (C2-01 through C2-04) – Increase the capacity of the drive. 6. The drive is trying to operate a specialized motor or a motor that is larger than the maximum applicable motor output of the drive. – Examine the motor nameplate, the motor, and the drive to make sure that the drive rated current is larger than the motor rated current. – Replace the drive with a larger capacity model. 7. A magnetic contactor was switched at the output. – Set the operation sequence to not turn ON or OFF the magnetic contactor while the drive is outputting voltage. 8. The V/f pattern settings are incorrect. – Examine the ratios between the V/f pattern frequency and voltage. Decrease the voltage if it is too high compared to the frequency. – Adjust E1-04 to E1-10 [V/f Pattern Parameters]. For motor 2, adjust E3-04 to E3-10. 9. The torque compensation gain is too large. – Decrease the value Torque Compensation Gain to make sure that the motor does not stall. 10. Electrical interference caused a problem. – Examine the control circuit lines, main circuit lines, and ground wiring, and decrease the effects of electrical interference.
oFA00 Option Not Compatible with Port	Cause: The option connected to connector CN5-A is not compatible. Solution: Connect the option to the correct connector. 1. The option card installed into port CN5-A is incompatible with the drive – Check if the drive supports the option card to be installed. 2. A PG option card is connected to option port CN5-A PG option cards are supported by option ports CN5-B and CN5-C only. – Connect the PG option card to the correct option port.
oFA01 Option Card Fault at Option Port CN5-A	Cause: Option not properly connected. – The option card connection to port CN5-A is faulty Solution: – Turn off the power and reconnect the option card. – Check if the option card is properly plugged into the option port. Make sure the card is fixed properly. – If the option is not a communication option card, try to use the card in a different option port. If the option card works properly in a different option port, CN5-A is damaged, and the drive requires replacement. If the error persists (oFb01 or oFC01 occur), replace the option card.
oFA02 Option Card Error Occurred at Option Port CN5-A	Cause: Option card or hardware is damaged. Solution: – Cycle power to the drive. – If the problem continues, replace either the control board or the entire drive.
oFA03 Option Card Error Occurred at Option Port CN5-A	Cause: Option card or hardware is damaged. Solution: – Cycle power to the drive. – If the problem continues, replace either the control board or the entire drive.
oFA04 Option Card Error Occurred at Option Port CN5-A	Cause: Option card or hardware is damaged. Solution: – Cycle power to the drive. – If the problem continues, replace either the control board or the entire drive.
oFA05 Option Card Error Occurred at Option Port CN5-A	Cause: Option card or hardware is damaged. Solution: – Cycle power to the drive. – If the problem continues, replace either the control board or the entire drive.
oFA06 Option Card Error Occurred at Option Port CN5-A	Cause: Option card or hardware is damaged. Solution: – Cycle power to the drive. – If the problem continues, replace either the control board or the entire drive.
oFA10 Option Card Error Occurred at Option Port CN5-A	Cause: Option card or hardware is damaged. Solution: – Cycle power to the drive. – If the problem continues, replace either the control board or the entire drive.
oFA11 Option Card Error Occurred at Option Port CN5-A	Cause: Option card or hardware is damaged. Solution: – Cycle power to the drive. – If the problem continues, replace either the control board or the entire drive.
oFA12 Option Card Connection Error (CN5-A)	Cause: Option card or hardware is damaged. Solution: – Cycle power to the drive. – If the problem continues, replace either the control board or the entire drive.
oFA13 Option Card Connection Error (CN5-A)	Cause: Option card or hardware is damaged. Solution: – Cycle power to the drive. – If the problem continues, replace either the control board or the entire drive.
oFA14 Option Card Connection Error (CN5-A)	Cause: Option card or hardware is damaged. Solution: – Cycle power to the drive. – If the problem continues, replace either the control board or the entire drive.
oFA15 Option Card Connection Error (CN5-A)	Cause: Option card or hardware is damaged. Solution: – Cycle power to the drive. – If the problem continues, replace either the control board or the entire drive.
oFA16 Option Card Connection Error (CN5-A)	Cause: Option card or hardware is damaged. Solution: – Cycle power to the drive. – If the problem continues, replace either the control board or the entire drive.
oFA17 Option Card Connection Error (CN5-A)	Cause: Option card or hardware is damaged. Solution: – Cycle power to the drive. – If the problem continues, replace either the control board or the entire drive.
oFA30 Comm. Option Card Connection Error (CN5-A)	Cause: Option card or hardware is damaged. Solution: – Cycle power to the drive. – If the problem continues, replace either the control board or the entire drive.
oFA31 Comm. Option Card Connection Error (CN5-A)	Cause: Option card or hardware is damaged. Solution: – Cycle power to the drive. – If the problem continues, replace either the control board or the entire drive.
oFA32 Comm. Option Card Connection Error (CN5-A)	Cause: Option card or hardware is damaged. Solution: – Cycle power to the drive. – If the problem continues, replace either the control board or the entire drive.
oFA33 Comm. Option Card Connection Error (CN5-A)	Cause: Option card or hardware is damaged. Solution: – Cycle power to the drive. – If the problem continues, replace either the control board or the entire drive.
oFA34 Comm. Option Card Connection Error (CN5-A)	Cause: Option card or hardware is damaged. Solution: – Cycle power to the drive. – If the problem continues, replace either the control board or the entire drive.
oFA35 Comm. Option Card Connection Error (CN5-A)	Cause: Option card or hardware is damaged. Solution: – Cycle power to the drive. – If the problem continues, replace either the control board or the entire drive.
oFA36 Comm. Option Card Connection Error (CN5-A)	Cause: Option card or hardware is damaged. Solution: – Cycle power to the drive. – If the problem continues, replace either the control board or the entire drive.
oFA37 Comm. Option Card Connection Error (CN5-A)	Cause: Option card or hardware is damaged. Solution: – Cycle power to the drive. – If the problem continues, replace either the control board or the entire drive.
oFA38 Comm. Option Card Connection Error (CN5-A)	Cause: Option card or hardware is damaged. Solution: – Cycle power to the drive. – If the problem continues, replace either the control board or the entire drive.
oFA39 Comm. Option Card Connection Error (CN5-A)	Cause: Option card or hardware is damaged. Solution: – Cycle power to the drive. – If the problem continues, replace either the control board or the entire drive.
oFA40 Comm. Option Card Connection Error (CN5-A)	Cause: Option card or hardware is damaged. Solution: – Cycle power to the drive. – If the problem continues, replace either the control board or the entire drive.
oFA41 Comm. Option Card Connection Error (CN5-A)	Cause: Option card or hardware is damaged. Solution: – Cycle power to the drive. – If the problem continues, replace either the control board or the entire drive.
oFA42 Comm. Option Card Connection Error (CN5-A)	Cause: Option card or hardware is damaged. Solution: – Cycle power to the drive. – If the problem continues, replace either the control board or the entire drive.
oFA43 Comm. Option Card Connection Error (CN5-A)	Cause: Option card or hardware is damaged. Solution: – Cycle power to the drive. – If the problem continues, replace either the control board or the entire drive.
oFb00 Option Card Fault at Option Port CN5-B	Cause: Option compatibility error. Solution: 1. The option card installed into port CN5-B is incompatible with the drive. – Make sure the drive supports the option card to be installed. 2. A communication option card has been installed in option port CN5-B. – Communication option cards are only supported by option port CN5-A. It is not possible to install more than one communication option.
oFb01 Option Card Fault at Option Port CN5-B	Cause: Option not properly connected. The option card connection to port CN5-B is faulty Solution: – Turn off the power and reconnect the option card. – Check if the option card is properly plugged into the option port. Make sure the card is fixed properly. – Try to use the card in a different option port (in case of a PG option, use port CN5-C). If the option card works properly in a different option port, CN5-B is damaged, and the drive requires replacement. If the error persists (oFA01 or oFC01 occur), replace the option card.
oFb02 Option Card Fault at Option Port CN5-B	Cause: Same type of option card is currently connected. Solution: 1. An option card of the same type is already installed in option port CN5-A Except for PG options, only one of each option card type can only be installed simultaneously. – Make sure only one type of option card is connected. 2. An input option card is already installed in option port CN5-A Install a communication option, a digital input option, or an analog input option. – More than one of the same type of card cannot be installed simultaneously.
oFb03 Option Card Error Occurred at Option Port CN5-B	Cause: Option card or hardware is damaged. Solution: – Cycle power to the drive. – If the problem continues, replace either the control board or the entire drive.
oFb04 Option Card Error Occurred at Option Port CN5-B	Cause: Option card or hardware is damaged. Solution: – Cycle power to the drive. – If the problem continues, replace either the control board or the entire drive.
oFb05 Option Card Error Occurred at Option Port CN5-B	Cause: Option card or hardware is damaged. Solution: – Cycle power to the drive. – If the problem continues, replace either the control board or the entire drive.
oFb06 Option Card Error Occurred at Option Port CN5-B	Cause: Option card or hardware is damaged. Solution: – Cycle power to the drive. – If the problem continues, replace either the control board or the entire drive.
oFb07 Option Card Error Occurred at Option Port CN5-B	Cause: Option card or hardware is damaged. Solution: – Cycle power to the drive. – If the problem continues, replace either the control board or the entire drive.
oFb08 Option Card Error Occurred at Option Port CN5-B	Cause: Option card or hardware is damaged. Solution: – Cycle power to the drive. – If the problem continues, replace either the control board or the entire drive.
oFb09 Option Card Error Occurred at Option Port CN5-B	Cause: Option card or hardware is damaged. Solution: – Cycle power to the drive. – If the problem continues, replace either the control board or the entire drive.
oFb10 Option Card Error Occurred at Option Port CN5-B	Cause: Option card or hardware is damaged. Solution: – Cycle power to the drive. – If the problem continues, replace either the control board or the entire drive.
oFb11 Option Card Error Occurred at Option Port CN5-B	Cause: Option card or hardware is damaged. Solution: – Cycle power to the drive. – If the problem continues, replace either the control board or the entire drive.
oFb12 Option Card Error Occurred at Option Port CN5-B	Cause: Option card or hardware is damaged. Solution: – Cycle power to the drive. – If the problem continues, replace either the control board or the entire drive.
oFb13 Option Card Error Occurred at Option Port CN5-B	Cause: Option card or hardware is damaged. Solution: – Cycle power to the drive. – If the problem continues, replace either the control board or the entire drive.
oFb14 Option Card Error Occurred at Option Port CN5-B	Cause: Option card or hardware is damaged. Solution: – Cycle power to the drive. – If the problem continues, replace either the control board or the entire drive.
oFb15 Option Card Error Occurred at Option Port CN5-B	Cause: Option card or hardware is damaged. Solution: – Cycle power to the drive. – If the problem continues, replace either the control board or the entire drive.
oFb16 Option Card Error Occurred at Option Port CN5-B	Cause: Option card or hardware is damaged. Solution: – Cycle power to the drive. – If the problem continues, replace either the control board or the entire drive.
oFb17 Option Card Error Occurred at Option Port CN5-B	Cause: Option card or hardware is damaged. Solution: – Cycle power to the drive. – If the problem continues, replace either the control board or the entire drive.
oFC00 Option Card Connection Error at Option Port CN5-C	Cause: Option compatibility error. Solution: 1. The option card installed into port CN5-C is incompatible with the drive. – Confirm that the drive supports the option card to be installed. 2. A communication option card has been installed in option port CN5-C. – Communication option cards are only supported by option port CN5-A. It is not possible to install more than one communication option.
oFC01 Option Card Fault at Option Port CN5-C	Cause: Option not properly connected. The option card connection to port CN5-C is faulty. Solution: – Turn the power off and reconnect the option card. – Check if the option card is properly plugged into the option port. Make sure the card is fixed properly. – Try to use the card in a different option port (in case of a PG option, use port CN5-B). If the option card works properly in a different option port, CN5-C is damaged, and the drive requires replacement. If the error persists (oFA01 or oFb01 occur), replace the option card.
oFC02 Option Card Fault at Option Port CN5-C	Cause: Same type of option card is currently connected Solution: 1. An option card of the same type is already installed in option port CN5-A or CN5-B. Except for PG options, only one of each option card type can only be installed simultaneously. – Make sure only one type of option card is connected. 2. An input option card is already installed in option port CN5-A or CN5-B. Install a communication option, a digital input option, or an analog input option. – More than one of the same type of card cannot be installed simultaneously. 3. Three PG option boards are installed. A maximum of two PG option boards can be used simultaneously. – Remove the PG option board installed into option port CN5-A.
oFC03 Option Card Error Occurred at Option Port CN5-C	Cause: Option card or hardware is damaged. Solution: – Cycle power to the drive. – If the problem continues, replace the control board or the entire drive.
oFC04 Option Card Error Occurred at Option Port CN5-C	Cause: Option card or hardware is damaged. Solution: – Cycle power to the drive. – If the problem continues, replace the control board or the entire drive.
oFC05 Option Card Error Occurred at Option Port CN5-C	Cause: Option card or hardware is damaged. Solution: – Cycle power to the drive. – If the problem continues, replace the control board or the entire drive.
oFC06 Option Card Error Occurred at Option Port CN5-C	Cause: Option card or hardware is damaged. Solution: – Cycle power to the drive. – If the problem continues, replace the control board or the entire drive.
oFC07 Option Card Error Occurred at Option Port CN5-C	Cause: Option card or hardware is damaged. Solution: – Cycle power to the drive. – If the problem continues, replace the control board or the entire drive.
oFC08 Option Card Error Occurred at Option Port CN5-C	Cause: Option card or hardware is damaged. Solution: – Cycle power to the drive. – If the problem continues, replace the control board or the entire drive.
oFC09 Option Card Error Occurred at Option Port CN5-C	Cause: Option card or hardware is damaged. Solution: – Cycle power to the drive. – If the problem continues, replace the control board or the entire drive.
oFC10 Option Card Error Occurred at Option Port CN5-C	Cause: Option card or hardware is damaged. Solution: – Cycle power to the drive. – If the problem continues, replace the control board or the entire drive.
oFC11 Option Card Error Occurred at Option Port CN5-C	Cause: Option card or hardware is damaged. Solution: – Cycle power to the drive. – If the problem continues, replace the control board or the entire drive.
oFC12 Option Card Error Occurred at Option Port CN5-C	Cause: Option card or hardware is damaged. Solution: – Cycle power to the drive. – If the problem continues, replace the control board or the entire drive.
oFC13 Option Card Error Occurred at Option Port CN5-C	Cause: Option card or hardware is damaged. Solution: – Cycle power to the drive. – If the problem continues, replace the control board or the entire drive.
oFC14 Option Card Error Occurred at Option Port CN5-C	Cause: Option card or hardware is damaged. Solution: – Cycle power to the drive. – If the problem continues, replace the control board or the entire drive.
oFC15 Option Card Error Occurred at Option Port CN5-C	Cause: Option card or hardware is damaged. Solution: – Cycle power to the drive. – If the problem continues, replace the control board or the entire drive.
oFC16 Option Card Error Occurred at Option Port CN5-C	Cause: Option card or hardware is damaged. Solution: – Cycle power to the drive. – If the problem continues, replace the control board or the entire drive.
oFC17 Option Card Error Occurred at Option Port CN5-C	Cause: Option card or hardware is damaged. Solution: – Cycle power to the drive. – If the problem continues, replace the control board or the entire drive.
oFC50 Option Card Error Occurred at Option Port CN5-C	Cause: Option card or hardware is damaged. Solution: Refer to the option manual for details.
oFC51 Option Card Error Occurred at Option Port CN5-C	Cause: Option card or hardware is damaged. Solution: Refer to the option manual for details.
oFC52 Option Card Error Occurred at Option Port CN5-C	Cause: Option card or hardware is damaged. Solution: Refer to the option manual for details.
oFC53 Option Card Error Occurred at Option Port CN5-C	Cause: Option card or hardware is damaged. Solution: Refer to the option manual for details.
oFC54 Option Card Error Occurred at Option Port CN5-C	Cause: Option card or hardware is damaged. Solution: Refer to the option manual for details.
oFC55 Option Card Error Occurred at Option Port CN5-C	Cause: Option card or hardware is damaged. Solution: Refer to the option manual for details.
oH Heatsink Overheat	Cause & Solution: The heatsink temperature exceeded the overheat pre-alarm level set to L8-02. The default value for L8-02 is determined by drive model selection (o2-04). 1. The ambient temperature is high and the heatsink temperature of the drive is more than the value set in L8-02 [Overheat Alarm Level]. – Measure the ambient temperature. – Increase the airflow in the control panel. – Install a cooling device (cooling fan or air conditioner) to lower the ambient temperature. – Remove objects near the drive that are producing too much heat. 2. The load is too heavy. – Measure the output current. – Decrease the load. 3. The internal cooling fan of the drive stopped. – Use the procedures in this manual to replace the cooling fan.
oH1 Heatsink Overheat	Cause & Solution: The heatsink temperature exceeded the drive overheat level. Overheat level is determined by drive capacity (o2-04). 1. The ambient temperature is high and the heatsink temperature of the drive is more than the oH1 detection level. – Measure the ambient temperature. – Increase the airflow in the control panel. – Install a cooling device (cooling fan or air conditioner) to lower the ambient temperature. – Remove objects near the drive that are producing too much heat. 2. The load is too heavy. – Measure the output current. – Decrease the load. – Decrease the value set in C6-02 [Carrier Frequency Selection].
oH3 Motor Overheat (PTC Input)	Cause & Solution: The motor overheat signal to analog input terminal A1, A2, or A3 exceeded the alarm detection level. Detection requires setting multi-function analog inputs H3-02, H3-10, or H3-06 to E. 1. The thermistor wiring that detects motor temperature is defective. – Correct wiring errors. 2. A fault occurred on the machine. Example: The machine is locked. – Examine the machine and remove the cause of the fault 3. The motor has overheated. – Check the load level, acceleration/deceleration time, and motor start/stop frequency (cycle time). – Decrease the load.- Make sure that the motor cooling system is operating correctly, and repair or replace it if it is damaged. – Adjust the preset V/f pattern (E1-04 through E1-10) by reducing E1-08 and E1-10.
oH4 Motor Overheat Fault (PTC Input)	Cause: The motor has overheated. The motor overheat signal to analog input terminal A1, A2, or A3 exceeded the fault detection level. Detection requires setting multi-function analog inputs H3-02, H3-10, or H3-06 to E. Solution: – Check the size of the load, the accel/decel times, and the cycle times. – Decrease the load. – Increase the acceleration and deceleration times (C1-01 through C1-08). – Adjust the preset V/f pattern (E1-04 through E1-10) by reducing E1-08 and E1-10. – Do not set E1-08 and E1-10 too low. This reduces load tolerance at low speeds. – Check the motor rated current. – Enter the motor rated current to parameter E2-01 as indicated on the motor nameplate. – Ensure the motor cooling system is operating normally. – Repair or replace the motor cooling system.
oL1 Motor Overload	Cause & Solution: 1. The load is too heavy. – Decrease the load. Note: Reset oL1 when U4-16 [Motor oL1 Level] < 100. 2. The acceleration/deceleration times or cycle times are too short. – Examine the acceleration/deceleration times and the motor start/ stop frequencies (cycle times). – Increase the values set in C1-01 to C1-08 [Acceleration/ Deceleration Times]. 3. Overload occurred while running at low speed. – Decrease the load when running at low speed. – Increase the motor speed. – If the motor is run frequently at low speeds, replace the motor with a larger motor or use a drive-dedicated motor. Note: For general-purpose motors, overload can occur while running at low speed when operating at below the rated current. 4. L1-01 [Motor Overload (oL1) Protection] is set incorrectly. – Set L1-01 in as specified by the motor qualities for a drive-dedicated motor. 5. The V/f pattern does not fit the motor qualities. – Examine the ratios between the V/f pattern frequency and voltage. Decrease the voltage if it is too high compared to the frequency. – Adjust E1-04 to E1-10 [V/f Pattern Parameters]. For motor 2, adjust E3-04 to E3-10. Decrease the values set in E1-08 [Mid Point A Voltage] and E1-10 [Minimum Output Voltage]. 6. E1-06 [Base Frequency] is set incorrectly. – Set E1-06 to the rated frequency shown on the motor nameplate. 7. One drive is operating more than one motor. – Set L1-01 = 0 [Motor Overload (oL1) Protection = Disabled], connect thermal overload relay to each motor to prevent damage to the motor. 8. The electronic thermal protector qualities and the motor overload properties do not align. – Examine the motor qualities and set L1-01 [Motor Overload (oL1) Protection] correctly. – Connect a thermal overload relay to the motor. 9. The electronic thermal protector is operating at an incorrect level. – Set E2-01 [Motor Rated Current (FLA)] correctly to the value specified by the motor nameplate. 10. There is increased motor loss from overexcitation operation. – Lower the value set in n3-13 [OverexcitationBraking (OEB) Gain]. – Set L3-04 ≠ 4 [Stall Prevention during Decel ≠ Overexcitation/ High Flux]. – Set n3-23 = 0 [Overexcitation Braking Operation = Disabled]. 11. The speed search-related parameters are set incorrectly. – Examine the settings for all speed search related parameters. – Adjust b3-03 [Speed Search Deceleration Time]. – Set b3-24 = 1 [Speed Search Method Selection = Speed Estimation] after Auto-Tuning. 12. Phase loss in the input power supply is causing the output current to change. – Make sure that there is no phase loss, and repair problems. 13. Overload occurred during overexcitation deceleration. – Decrease the value set in n3-13 [OverexcitationBraking (OEB) Gain]. – Decrease the value set in n3-21 [HSB Current Suppression Level].
oL2 Drive Overload	Cause & Solution: 1. The load is too large. Decrease the load. 2. The acceleration/deceleration times or cycle times are too short. – Examine the acceleration/deceleration times and the motor start/ stop frequencies (cycle times). – Increase the values set in C1-01 to C1-08 [Acceleration/ Deceleration Times]. 3. The V/f pattern does not fit the motor qualities. – Examine the ratios between the V/f pattern frequency and voltage. Decrease the voltage if it is too high compared to the frequency. – Adjust E1-04 to E1-10 [V/f Pattern Parameters]. Decrease the values set in E1-08 [Mid Point A Voltage] and E1-10 [Minimum Output Voltage]. For motor 2, adjust E3-04 to E3-10. Note: If the values set in E1-08 and E1-10 are too low, the overload tolerance will decrease at low speeds. 4. The drive capacity is too small. – Replace the drive with a larger capacity model. 5. Overload occurred while running at low speed. – Decrease the load when running at low speed. – Replace the drive with a larger capacity model. – Decrease the value set in C6-02 [Carrier Frequency Selection]. 6. The torque compensation gain is too large. – Decrease the value set in C4-01 [Torque Compensation Gain] to make sure that the motor does not stall. 7. The speed search-related parameters are set incorrectly. – Examine the settings for all speed search-related parameters. – Adjust b3-03 [Speed Search Deceleration Time]. – Set b3-24 = 1 [Speed Search Method Selection = Speed Estimation] after Auto-Tuning. 8. Phase loss in the input power supply is causing the output current to change. – Correct errors with the wiring for main circuit drive input power. – Make sure that there is no phase loss, and repair problems. 9. Overload occurred during overexcitation deceleration. – Decrease the value set in n3-13 [OverexcitationBraking (OEB) Gain]. – Decrease the value set in n3-21 [HSB Current Suppression Level].
oL3 Overtorque Detection 1	Cause & Solution: 1. A fault occurred on the machine. Example: The machine is locked. – Examine the machine and remove the cause of the fault. 2. The parameters are incorrect for the load. – Adjust L6-02 [Torque Detection Level 1] and L6-03 [Torque Detection Time 1] settings.
oL4 Overtorque Detection 2	Cause & Solution: 1. A fault occurred on the machine. Example: The machine is locked. – Examine the machine and remove the cause of the fault. 2. The parameters are incorrect for the load. – Adjust L6-05 [Torque Detection Level 2] and L6-06 [Torque Detection Time 2] settings.
oL5 Mechanical Weakening Detection 1	Cause: The drive detected overtorque as specified by the conditions for mechanical weakening detection set in L6-08. Solution: Check for the cause of mechanical weakening.
oPr External Digital Operator Connection Fault	Cause & Solution: The external operator has been disconnected from the drive. 1. External operator is not properly connected to the drive. – Check the connection between the operator and the drive. – Replace the cable if damaged. – Turn off the drive input power and disconnect the operator. Next reconnect the operator and turn the drive input power back on.
oS Overspeed	Cause & Solution: The motor speed feedback exceeded the F1-08 setting. 1. There is overshoot. – Reduce the C5-01, Speed Control Proportional Gain 1, setting and increase the C5-02, Speed Control Integral Time 1, setting. – If using Closed Loop Vector mode, enable Feed Forward and perform Inertia Auto-Tuning. 2. Incorrect speed feedback scaling if terminal RP is used as speed feedback input in V/f control – Set H6-02 to the value of the speed feedback signal frequency when the motor runs at the maximum speed. – Adjust the input signal using parameters H6-03 through H6-05. 3. Incorrect number of PG pulses has been set – Check and correct parameter F1-01. 4. Inappropriate parameter settings – Check the setting for the overspeed detection level and the overspeed detection time (F1-08 and F1-09).
ov Control Circuit Overvoltage	Cause: Voltage in the control circuit has exceeded the overvoltage level. – For 200 V class: approximately 450 V – For 400 V class: approximately 900 V Solution: 1. Ground fault in the output circuit causing the capacitor to overcharge. – Check the motor wiring for ground faults. – Correct grounding shorts and turn the power back on. 2. Drive input power voltage is too high. – Check the voltage. – Lower drive input power voltage within the limits listed in the specifications. 3. The capacity of the input power supply is too small. – Use a power supply that has at least twice the input capacity of the drive. 4. The input power supply repeatedly turned on and off over a short period of time. – Implement countermeasures so that chattering does not occur for the input power supply. 5. An I/O terminal is loose. – Check the tightening torque of the I/O terminals. 6. Chattering is occurring in the magnetic contactor (MC) installed between the drive’s output terminals and the motor. – Implement countermeasures so that chattering does not occur for the MC. 7. There is a phase loss or an imbalance in the interphase voltages of the input power supply. – Check the status of the input power supply and eliminate phase losses and imbalance.
PGo PG Disconnect	Cause & Solution: No PG pulses are received for longer than the time set to F1-14. 1. PG cable is disconnected – Reconnect the cable. 2. PG cable wiring is wrong – Correct the wiring. 3. PG has no power – Check the power line to the PG encoder. 4. PG encoder brake is clamped shut – Ensure the motor brake releases properly.
PGoH PG Hardware Fault	Cause: PG cable is not connected properly. Solution: Reconnect the cable and check the setting of F1-20.
SCF Safety Circuit Fault	Cause: Safety Circuit Fault is detected. The safety circuit is damaged. Solution: Replace either the control board or the entire drive.
SEr Speed Search Retries	Cause & Solution: Too Many Speed Search Restarts. The number of Speed Search restarts exceeded the value set to b3-19. 1. Exceeded The speed search-related parameters are set incorrectly. – Reduce the detection compensation gain during Speed Search (b3-10). – Increase the current level when attempting Speed Search (b3-17). – Increase the detection time during Speed Search (b3-18). – Repeat Auto-Tuning. 2. The motor is coasting in the opposite direction of the Run command. – Set b3-14 to 1 to enable Bi-Directional Speed Search.
SoH Snubber Discharge Resistor Overheat	Cause & Solution: 1. The input power supply voltage is too high. The capacity of the power supply is too small. The distortion in the power supply is too large. – Reduce the voltage to within the range in the power supply specifications. – Increase the capacity of the power supply. – Lower the impedance of the input power supply wiring. 2. The load was too large during repetitious operation. – Check the load conditions. (Reduce the load.) – Increase the acceleration/deceleration time. 3. A phase loss occurred in the input power supply. – Check the input power supply for phase loss or an imbalance in the interphase voltages.
SrC Phase Order Detection Fault	Cause: The phase rotation direction for the input power supply changed. Solution: 1. The power supply phase order changed during operation. – Investigate and correct the cause and then reset the fault. 2. An input power supply wiring terminal is loose. – Investigate and correct the cause and then reset the fault. 3. The fluctuation in the voltage of the input power supply is too large. – Investigate and correct the cause and then reset the fault.
Srr Internal Resistance Fault	Cause: An operation failure occurred in the snubber discharge resistor circuit. – The snubber discharge resistor or peripheral circuitsfailed. Solution: – Cycle power to the drive. – If the problem continues, replace either the control board or the entire drive.
STo Pull-Out Detection	Cause: Motor pull out or step out has occurred. Motor has exceeded its pull-out torque. Solution: 1. The wrong motor code is set (Yaskawa motors only) – Enter the correct motor code for the PM being used into E5-01. – For special-purpose motors, enter the correct data to all E5 parameters according to the test report provided for the motor. 2. Load is too heavy – Increase the load inertia for PM motor (n8-55). – Increase the pull-in current during accel/decel (n8-51). – Reduce the load. – Use a larger motor and drive. 3. Load inertia is too heavy. – Increase the load inertia for PM motor (n8-55). 4. Acceleration and deceleration times are too short – Increase the acceleration and deceleration times (C1-01 through C1-08). – Increase the S-curve acceleration and deceleration times (C2-01). 5. Speed response is too slow. – Increase the load inertia for PM motor (n8-55).
SvE Zero Servo Fault	Cause & Solution: Position deviation during zero servo. 1. Torque limit is set too low – Set the torque limit to an appropriate value using parameters L7-01 to L7-04. 2. Excessive load torque – Reduce the amount of load torque. 3. Electrical signal interference along PG encoder wiring – Check the PG signal for electrical signal interference.
UL3 Undertorque Detection 1	Cause & Solution: The current has fallen below the minimum value set for Torque Detection Level 1 (L6-02) for longer than the allowable time (L6-03). 1. A fault occurred on the machine. Example: There is a broken pulley belt. – Examine the machine and remove the cause of the fault. 2. The parameters are incorrect for the load. – Adjust L6-02 and L6-03 settings.
UL4 Undertorque Detection 2	Cause & Solution: The current has fallen below the minimum value set for Torque Detection Level 2 (L6-05) for longer than the allowable time (L6-06). 1. A fault occurred on the machine. Example: There is a broken pulley belt. – Examine the machine and remove the cause of the fault. 2. The parameters are incorrect for the load. – Check L6-05 and L6-06 settings
UL5 Mechanical Weakening Detection 2	Cause: The drive detected undertorque as specified by the conditions for mechanical weakening detection set in L6-08 [Mechanical Fatigue Detect Select]. The operation conditions matched the conditions set to L6-08. Solution: Examine the machine for deterioration. Check the load side for any problems.
Uv1 Control Circuit Undervoltage Fault	Cause: One of the following conditions occurred: – For 200 V class: approximately 175 V – For 400 V class: approximately 350 V Solution: 1. Input power phase loss. – The main circuit drive input power is wired incorrectly. – Correct the wiring. 2. One of the drive input power wiring terminals is loose. – Ensure there are no loose terminals. – Apply the tightening torque specified in this manual to fasten the terminals. 3. There is a problem with the voltage from the drive input power. – Check the voltage. – Correct the voltage to be within the range listed in drive input power specifications. – If there is no problem with the power supply to the main circuit, check for problems with the main circuit magnetic contactor. 4. The power has been interrupted. – Correct the drive input power. 5. The capacitors are worn. – Check the maintenance time for the capacitors (U4-05). – Replace the entire drive if U4-05 exceeds 90%. 6. The relay or contactor on the soft-charge bypass circuit is damaged. – Cycle power to the drive and see if the fault reoccurs. – If the problem continues, replace the entire drive. – Check monitor U4-06 for the performance life of the soft-charge bypass. – Replace the entire drive if U4-06 exceeds 90%.
Uv2 Control Power Supply Voltage Fault	Cause: Voltage is too low for the control drive input power. Solution: 1. Control power supply wiring is damaged. – Cycle power to the drive. Check if the fault reoccurs. – If the problem continues, replace the entire drive or the control power supply. 2. Internal circuitry is damaged. – Cycle power to the drive. Check if the fault reoccurs. – If the problem continues, replace the entire drive.
Uv3 Undervoltage 3 (Soft-Charge Bypass Circuit Fault)	Cause: The soft-charge bypass circuit has failed. – The relay or contactor on the soft-charge bypass circuit is damaged. Solution: – Cycle power to the drive and see if the fault reoccurs. – If the problem continues, replace the entire drive. – Check monitor U4-06 for the performance life of the soft-charge bypass. – Replace the entire drive if U4-06 exceeds 90%.
AEr Station Address Setting Error	Cause: Option card node address is outside of the acceptable setting range. Solution: – Set parameter F6-10 to the proper value when using a CC-Link option. – Set parameter F6-35 to the proper value when using a CANopen option.
bb Baseblock	Cause: Drive output interrupted as indicated by an external baseblock signal. – External baseblock signal was entered via one of the multi-function input terminals (S1 to S8). Solution: Check external sequence and baseblock signal input timing.
CALL Serial Comm Transmission Error	Cause & Solution: Communication has not yet been established. 1. The communications cable wiring is incorrect. – Correct wiring errors. 2. There is a short circuit in the communications cable or the communications cable is not connected. – Repair the short-circuited or disconnected portion of the cable. – Replace the defective communications cable. 3. A programming error occurred on the controller side. – Examine communications at start-up and correct programming errors 4. There is damage to the communications circuitry. – Do a self-diagnostics check. – If the problem continues, replace the control board or the drive. 5. The termination resistor setting for MEMOBUS/ Modbus communications is incorrect. – On the last drive in a MEMOBUS/Modbus network, set DIP switch S2 to the ON position to enable the termination resistor.
CrST Cannot Reset	Cause: Fault reset was being executed when a Run command was entered. Solution: – Ensure that a Run command cannot be entered from the external terminals or option during fault reset. – Turn off the Run command.
CyC MECHATROLINK CommCycleSetting Err	Cause: The controller is using a comm. Cycle beyond the allowable setting range for the MECHATROLINK option. Solution: Set the communications cycle of the controller in the permitted range of the MECHATROLINK interface option.
dnE Drive Disabled	Cause: “Drive Enable” is set to a multi-function contact input (H1-oo = 6A) and that signal was switched off. Solution: Check the operation sequence.
EF FWD/REV Run Command Input Error	Cause: A forward command and a reverse command were input at the same time for longer than 0.5 s. Solution: Examine the forward and reverse command sequence and correct the problem.
Hbb Safe Disable Signal Input	Cause: Both Safe Disable Input channels are open. Solution: 1. Both Safe Disable Inputs H1 and H2 are open. – Check signal status at the input terminals H1 and H2. – Check the Sink/Source Selection for the digital inputs. – If the Safe Disable function is not utilized, determine if terminals H1-HC, and H2-HC are linked. 2. Internally, both Safe Disable channels are broken. Replace either the control board or the entire drive.
HbbF Safe Disable Signal Input	Cause: One Safe Disable channel is open while the other channel is closed. Solution: 1 The signals to the Safe Disable inputs are wrong or the wiring is incorrect. – Check signal status at the input terminals H1 and H2. If the Safe Disable function is not utilized, terminals H1-HC, and H2-HC must be linked. 2. One of the Safe Disable channels is faulty. – Replace either the control board or the entire drive.
HCA Current Alarm	Cause: Drive current exceeded overcurrent warning level (150% of the rated current). Solution: 1. Load is too heavy. – Reduce the load for applications with repetitive operations (i.e., stops and starts), or use a larger drive. 2. Acceleration and deceleration times are too short. – Calculate the torque required during acceleration and for the moment of inertia. – If the torque level is not right for the load, take the following steps: – Increase the acceleration and deceleration times (C1-01 through C1-08). – Use a larger drive. 3. A special-purpose motor is being used, or the drive is attempting to run a motor greater than the rated output current. – Check the motor capacity. – Use a motor appropriate for the drive. Ensure the motor is within the rated output current range. 4. The current level increased due to Speed Search after a momentary power loss or while attempting to perform a fault restart. – The alarm will only appear briefly. There is no need to take action to prevent the alarm from occurring in such instances.
LT-1 Cooling Fan Maintenance Time	Cause: The cooling fan is at 90% of its expected performance life. Solution: 1. Replace the cooling fan. 2. Replace the cooling fan and reset the Maintenance Monitor by setting o4-03 to 0.
LT-2 Capacitor Maintenance Time	Cause: The capacitors for the main circuit and control circuit are at 90% of expected performance life. Solution: Replace the drive.
LT-3 SoftChargeBy passRelay MainteTime	Cause: The soft charge bypass relay is at 90% of its expected performance life. Solution: Replace the drive.
oH2 Heatsink Overheat Warning	Cause: “Heatsink Overheat Warning” was input to a multi-function input terminal, S1 through S8 (H1-oo= B). Solution: 1. An external device triggered an overheat warning in the drive. – Search for the device that tripped the overheat warning. Remove the cause of the problem.
PASS MEMOBUS Modbus Comm. Test Mode Complete	Cause: MEMOBUS/Modbus test has finished normally. Solution: This verifies that the test was successful.
rUn Motor Switch during Run	Cause: A command to switch motors was entered during run. Solution: 1. A motor switch command was entered during run. – Change the operation pattern so that the motor switch command is entered while the drive is stopped.
SE MEMOBUS Modbus Communication Test Mode Error	Cause: A digital input set to 67H (MEMOBUS/ Modbus test) was closed while the drive was running. Solution: Stop the drive and run the test again.
Uv Control Circuit Undervoltage	Cause: One of the following conditions occurred: – Contactor to suppress inrush current in the drive was opened. – Low voltage in the control drive input power. This alarm outputs only if L2-01 is not 0 and DC bus voltage is under L2-05. Solution: 1. Phase loss in the drive input power. Check for wiring errors in the main circuit drive input power. – Correct the wiring. 2. Loose wiring in the drive input power terminals. – Ensure the terminals have been properly tightened. – Apply the tightening torque to the terminals as specified. 3. There is a problem with the drive input power voltage. – Check the voltage. – Lower the voltage of the drive input power so that it is within the limits listed in the specifications. 4. Drive internal circuitry is worn. – Check the maintenance time for the capacitors (U4-05). – Replace either the control board or the entire drive if U4-05 exceeds 90%. 5. The drive input power transformer is too small and voltage drops when the power is switched on. – Check for an alarm when the magnetic contactor, line breaker, and leakage breaker are closed. – Check the capacity of the drive input power transformer.
oPE01 Drive Capacity Setting Error	Cause: Drive capacity and the value set to o2-04 do not match. The drive model selection (o2-04) and the actual capacity of the drive are not the same. Solution: Set o2-04 to the correct value.
oPE02 Parameter Range Setting Error	Cause & Solution: 1. Parameter settings are not in the applicable setting range. – Use U1-18 to find parameters set outside the range. – Correct the parameter settings. 2. Parameters were set outside the possible setting range. – Set parameters to the proper values.
oPE03 Multi-Function Input Setting Err	Cause: A contradictory setting is assigned to multi-function contact inputs H1-01 to H1-08. Solution: 1. The same function is assigned to two multi-function inputs. Excludes “Not used” and “External Fault.” – Ensure all multi-function inputs are assigned to different functions. – Re-enter the multi-function settings to ensure this does not occur. 2. The Up command was set but the Down command was not, or vice versa (settings 10 vs. 11). The Up 2 command was set but the Down 2 command was not, or vice versa (settings 75 vs. 76). – Properly set the functions that required for use in combination with other functions. 3. Run/Stop command for a 2-wire sequence was set (H1-oo = 42), but Forward/Reverse command (H1-oo = 43) was not. • “Drive Enable” is set to multi-function input S1 or S2 (H1-01 = 6A or H1-02 = 6A). – Properly set the functions that required for use in combination with other functions. 4. Two of the following functions are set simultaneously: • Up/Down Command (10 vs. 11) • Up 2/Down 2 Command (75 vs. 76) • Hold Accel/Decel Stop (A) • Analog Frequency Reference Sample/Hold (1E) • Offset Frequency 1, 2, 3 Calculations (44, 45, 46) – Check if contradictory settings have simultaneously been assigned to the multi-function input terminals. – Correct setting errors. 5. The Up/Down command (10, 11) and PID control (b5-01) are enabled simultaneously. – Set b5-01 to 0 to disable control PID or disable the Up/Down command. 6. Settings for N.C. and N.O. input for the following functions were selected simultaneously: • External Search Command 1 and External Search Command 2 (61 vs. 62) • Fast Stop N.O. and Fast Stop N.C. (15 vs. 17) • KEB for Momentary Power Loss and High Slip Braking (65, 66, 7A, 7B vs. 68) • Motor Switch Command and Accel/Decel Time 2 (16 vs. 1A) • KEB Command 1 and KEB Command 2 (65, 66 vs. 7A, 7B) • FWD Run Command (or REV) and FWD/REV Run Command (2-wire) (40, 41 vs. 42, 43) • External DB Command and Drive Enable (60 vs. 6A) • Motor Switch Command and Up 2/Down 2 Command (16 vs. 75, 76) – Check if contradictory settings have simultaneously been assigned to the multi-function input terminals. – Correct setting errors.
oPE04 Terminal Board Mismatch Error	Cause: The drive, control board, or terminal board has been replaced and the parameter settings between the control board and the terminal board no longer match. Solution: Set A1-03 to 5550 to load the parameter settings stored in the terminal board to the drive. Initialize parameters after drive replacement by setting A1-03 to 2220 or 3330.
oPE05 Run Command Frequency Reference Source Selection Error	Cause & Solution: 1. Frequency reference is assigned to an option card (b1-01 = 3) and an input option card is not connected to the drive. – Reconnect the input option card to the drive. 2. Frequency reference is assigned to the pulse train input (b1-01 = 4) and terminal RP is not set for frequency reference input (H6-01 > 0) – Set H6-01 to 0. 3. Although the digital card input is set for BCD special for a 5-digit input (F3-01 = 6), the data length is set for 8-bit or 12-bit (F3-03 = 0, 1). – Set F3-03 to 2 to set the input data for 16-bit. 4. The following values have been set while an AI-A3 option card is installed: • The source of frequency reference setting is assigned to an option card (b1-01 = 3). • The action for the analog card is set for separate terminal input (F2-01 = 0). – Properly set parameters.
oPE06 Control Method Selection Error	Cause: Correct the setting for the control method. Solution: 1. A control mode has been selected that requires a PG option card to be installed, but no PG encoder is installed (A1-02 = 1, 3, or 7). – Connect a PG option card. – Correct the value set to A1-02.
oPE07 Multi-Function Analog Input Selection Error	Cause: A contradictory setting is assigned to multi-function analog inputs H3-02, H3-10, or H3-06 and PID functions conflict. Solution: 1. At least two analog input terminals are set to the same function (i.e., at least two of these parameters have the same setting: H3-02, H3-10, or H3-06). – Change the settings to H3-02, H3-10, and H3-06 so that functions no longer conflict. 2. The following simultaneous contradictory settings: • H3-02, H3-10, or H3-06 = B (PID Feedback) while H6-01 (Pulse Train Input) = 1 (PID Feedback) • H3-02, H3-10, or H3-06 = C (PID Target Value) while H6-01 = 2 (pulse train input sets the PID target value) • H3-02, H3-10, or H3-06 = C (PID Target Value) while b5-18 = 1 (enables b5-19 as the target PID value) • H6-01 = 2 (PID target) while b5-18 = 1 (enables b5-19 as the target PID value) – Disable one of the PID selections.
oPE08 Parameter Selection Error	Cause: A function has been set that cannot be used in the motor control method selected. Solution: 1. Attempted to use a function that is not valid for the selected control mode. – Check the motor control method and the functions available. 2. In OLV/PM, parameters E5-02 to E5-07 are set to 0. – Set the correct motor code in accordance with the motor being used (E5-01). – When using a special-purpose motor, set E5- in accordance with the test report provided. 3. Both E5-09 and E5-24 are set to 0, or are not 0 in control modes for PM. – Set E5-09 or E5-24 to the correct value, and set the other to “0”.
oPE09 PID Control Selection Fault	Cause: PID control function selection is incorrect. Requires that PID control is enabled (b5-01 = 1 to 4). Solution: 1. The following simultaneous contradictory settings have occurred: • b5-15 is not set to 0.0 (PID Sleep Function Operation Level) • The stopping method is set to either DC Injection Braking or coast to stop with a timer (b1-03 = 2 or 3). – Set b5-15 to a value other than 0.0. – Set the stopping method to coast to stop or ramp to stop (b1-03 = 0 or 1). 2. b5-01 is set to 1 or 2, enabling PID control, but the lower limit for the frequency reference (d2-02) is not set to 0 while reverse output is enabled (b5-11 = 1). – Correct the parameter settings. 3. b5-01 is set to 3 or 4, enabling PID control, but the lower limit for the frequency reference (d2-01) is not 0. – Correct the parameter settings.
oPE10 V/f Data Setting Error	Cause: One or more of the parameters listed below are not set according to the formula: – E1-09 ≤ E1-07 < E1-06 ≤ E1-11 ≤ E1-04 – E3-09 ≤ E3-07 < E3-06 ≤ E3-11 ≤ E3-04 Solution: 1. V/f pattern setting error. – Correct the settings for E1-04, E1-06, E1-07, E1-09, and E1-11. For motor 2, correct E3-04, E3-06, E3-07, E3-09, and E3-11.
oPE11 Carrier Frequency Setting Error	Cause: Correct the setting for the carrier frequency. Solution: 1. The following simultaneous contradictory settings have occurred: C6-05 > 6 and C6-04 > C6-03 (carrier frequency lower limit is greater than the upper limit). – If C6-05 ≤ 6, the drive operates at C6-03. Correct the parameter settings. 2. The upper and lower limits between C6-02 and C6-05 are contradictory. – Correct the parameter settings.
oPE13 Pulse Monitor Selection Error	Cause: Incorrect setting of monitor selection for pulse train (H6-06). Solution: Scaling for the pulse train monitor is set to 0 (H6-07 = 0) while H6-06 is not set to 101, 102, 105, or 116. – Change scaling for the pulse train monitor or set H6-06 to 101, 102, 105, or 116.
oPE15 Torque Control Setting Error	Cause: Parameter settings that are not allowed in combination with Torque Control have been set. Solution: Torque Control is enabled (d5-01 = 1) while the Speed/Torque Control switch function is assigned to a digital input (H1-oo = 71). – Correct the parameter settings.
oPE16 Energy Savings Constants Error	Cause: In AOLV/PM, the automatically calculated energy saving coefficients are out of the allowable range. Solution: Check and correct the motor data in E5 parameters.
oPE18 Online Tuning Parameter Setting Error	Cause: Parameters controlling online tuning are not set correctly. Solution: 1. One of the following errors occurred while online tuning was enabled in OLV (A1-02 = 2): • E2-02 was set below 30% of the original default value • E2-06 was set below 50% of the original default value • E2-03 = 0 – Set E2-02, E2-03, and E2-06 to the correct values.
oPE20 PG-F3 Setting Error	Cause: The encoder signal frequency is too high. Solution: 1. With the entered encoder resolution (F1-01), maximum output frequency (E1-04), and motor pole number (E5-04), the calculation encoder signal frequency exceeded 50 kHz (with PG-F3 option). – Set F1-01 to the correct encoder resolution. – Reduce the maximum output frequency of the drive in parameter E1-04 so the encoder signal frequency at maximum speed is lower than 50 kHz.
oPE30 Incorrect Input Voltage Adjustment	Cause & Solution: 1. The input voltage offset adjustment has not been performed. – The setting of o2-04 (Drive Model Selection) changed. – EEPROM failed for the input voltage offset.
End1 Excessive V/f Setting	Cause: The torque reference exceeded 20% during Auto-Tuning. The results from Auto-Tuning the no-load current exceeded 80%. Solution: – Prior to Auto-Tuning, verify the information on the motor nameplate. – Enter proper values from motor nameplate to parameters T1-03 to T1-05 and repeat Auto-Tuning. – If possible, disconnect the motor from the load and perform Auto-Tuning. If the load cannot be uncoupled, use the current Auto-Tuning results.
End2 Iron Core Saturation Coefficient	Cause & Solution: 1. The motor nameplate data entered during Auto- Tuning is incorrect. – Make sure that the input motor nameplate data is correct. – Do Auto-Tuning again and correctly set the motor nameplate data. 2. Auto-Tuning results were not in the applicable parameter setting range, and E2-07 or E2-08 [Motor Saturation Coefficient 2] have temporary values. – Examine and repair damaged motor wiring. – If you can uncouple the motor and load, remove the motor from the machine and do Rotational Auto-Tuning again.
End3 Rated Current Setting Alarm	Cause: The rated current value is incorrect. Solution: Do Auto-Tuning again and set the correct rated current shown on the motor nameplate.
End4 Adjusted Slip Calculation Error	Cause: The calculated slip is outside the allowable range. Solution: – Make sure the data entered for Auto-Tuning is correct. – If possible, perform Rotational Auto-Tuning. If not possible, perform Stationary Auto-Tuning 2.
End5 Resistance Tuning Error	Cause: The calculated resistance value is outside the allowable range. Solution: – Double-check the data entered for the Auto-Tuning process. – Check the motor and motor cable connection for faults.
End6 Leakage Inductance Alarm	Cause: The Auto-Tuning results were not in the applicable parameter setting range. Solution: – Double-check the data entered for the Auto-Tuning process. – Check the setting of A1-02. – Check the control mode and repeat Auto-Tuning.
End7 No-Load Current Alarm	Cause & Solution: 1. The Auto-Tuning results of the motor no-load current value were not in the applicable range. – Examine and repair damaged motor wiring. 2. Auto-Tuning results were less than 5% of the motor rated current. – Make sure that the input motor nameplate data is correct. – Auto-Tuning again.
Er-01 Motor Data Error	Cause & Solution: 1. Motor data or data entered during Auto-Tuning was incorrect – Check that the motor data entered to T1 parameters matches motor nameplate input before Auto-Tuning. – Restart Auto-Tuning and enter the correct information. 2. Motor rated power and motor-rated current settings (T1-02 and T1-04) do not match. – Check the drive and motor capacities. – Correct the settings of parameters T1-02 and T1-04. 3. Motor rated current and detected no-load current are inconsistent. – Check the motor rated current and no-load current. – Correct the settings of parameters T1-04 and E2-03 4. Base frequency and motor rated speed (T1-05 and T1-07) do not match. – Correct the settings of parameters T1-05 and T1-07. – Check that the correct number of poles were entered to T1-06.
Er-02 Minor Fault	Cause & Solution: 1. An alarm was triggered during Auto- Tuning. – Exit the Auto-Tuning menu, check the alarm code, remove the alarm cause, and repeat Auto-Tuning. 2. Motor data entered during Auto-Tuning was incorrect. – Check that the motor data entered matches the motor nameplate input before performing Auto-Tuning . – Restart Auto-Tuning and enter the correct information. 3. Faulty cable connection or the load is too heavy – Check and correct faulty motor wiring. – Check the vicinity of the machine. – Check the load conditions. – Investigate and correct the cause and then reset the fault.
Er-03 STOP Button Input	Cause: Auto-Tuning canceled by pressing STOP button. Solution: Auto-Tuning did not complete properly. Restart Auto-Tuning.
Er-04 Line-to-Line Resistance Error	Cause & Solution: 1. Motor data entered during Auto-Tuning was incorrect. – Make sure the data entered to the T1 parameters match the information written on the motor nameplate. – Restart Auto-Tuning and enter the correct information. 2. Results from Auto-Tuning are outside the parameter setting range or the tuning process took too long. – Check and correct faulty motor wiring.
Er-05 No-Load Current Error	Cause & Solution: 1. Motor data entered during Auto-Tuning was incorrect. – Make sure the data entered to the T1 parameters match the information written on the motor nameplate. – Restart Auto-Tuning and enter the correct information. 2. Results from Auto-Tuning are outside the parameter setting range or the tuning process took too long. – Check and correct faulty motor wiring. – Perform Rotational Auto-Tuning. 3. The load was too high during Rotational Auto-tuning. – Disconnect the motor from machine and restart Auto-Tuning. If motor and load cannot be uncoupled make sure the load is lower than 30%. – If a mechanical brake is installed, make sure it is fully lifted during tuning.
Er-08 Rated Slip Error	Cause & Solution: 1. Motor data entered during Auto-Tuning was incorrect. – Make sure the data entered to the T1 parameters match the information written on the motor nameplate. – Restart Auto-Tuning and enter the correct information. 2. Results from Auto-Tuning are outside the parameter setting range or the tuning process took too long. – Check and correct faulty motor wiring. – Perform Rotational Auto-Tuning. 3. The load was too high during rotational Auto-tuning. – Disconnect the motor from machine and restart Auto-Tuning. If motor and load cannot be uncoupled make sure the load is lower than 30%. – If a mechanical brake is installed, make sure it is fully lifted during tuning.
Er-09 Acceleration Error	Cause & Solution: 1. The motor did not accelerate for the specified acceleration time. – Increase the acceleration time (C1-01). – Disconnect the machine from the motor if possible. 2. Torque limit when motoring is too low (L7-01 and L7-02). – Check L7-01 and L7-02 settings. – Increase the setting. 3. The load was too high during Rotational Auto-Tuning. – Disconnect the motor from machine and restart Auto-Tuning. If motor and load cannot be uncoupled make sure the load is lower than 30%. – If a mechanical brake is installed, make sure it is fully lifted during tuning.
Er-10 Motor Direction Error	Cause & Solution: 1. The encoder signal lines are not properly connected to the drive. – Check and correct wiring to the PG encoder. 2. Motor direction and PG direction are opposite. – Check the motor speed monitor U1-05 while manually turning the motor forward. If the sign displayed is negative, change the setting of parameter F1-05. 3. The load pulled the motor in the opposite direction of the speed reference and the torque exceeded 100%. – Uncouple the motor from the load and restart Auto-Tuning.
Er-11 Motor Speed Error	Cause: Torque reference is too high. Solution: – Increase the acceleration time 1 (C1-01). – Disconnect the machine from the motor if possible.
Er-12 Current Detection Error	Cause & Solution: 1. One of the motor phases is missing: (U/T1, V/T2, W/T3). – Check motor wiring and correct any problems. 2. The current exceeded the current rating of the drive. – Check motor wiring for a short between motor lines. – Close any magnetic contactors used between motors. – Replace the control board or the entire drive. 3. Attempted Auto-Tuning without motor connected to the drive. – Connect the motor and restart Auto-Tuning. 4. Current detection signal error. – Replace the control board or the entire drive
Er-13 Leakage Inductance Error	Cause: Drive was unable to complete tuning for leakage inductance within 300 seconds. Solution: – Check all wiring and correct any mistakes. – Check the motor rated current value written on the motor nameplate and enter the correct value to T1-04.
Er-14 Motor Speed Error 2	Cause: The motor speed exceeded twice the amplitude of speed reference during Inertia Tuning. Solution: Reduce the ASR gain set to C5-01.
Er-15 Torque Saturation Error	Cause: The output torque reached the torque limit set in L7-01 through L7-04 during Inertia Tuning. Solution: – Increase the torque limits in L7-01 through L7-04 within reasonable limits. – Reduce the test signal frequency in T3-01 and restart Auto-Tuning. If necessary, reduce the test signal amplitude (T3-02) and restart Auto-Tuning.
Er-16 Inertia ID Error	Cause: The inertia identified by the drive was abnormally small or abnormally large during Inertia Tuning. Solution: – Reduce the test signal frequency in T3-01 and restart Auto-Tuning. If necessary, reduce the test signal amplitude (T3-02) and restart Auto-Tuning. – Check the basic motor inertia value entered to T3-03.
Er-17 Reverse Prohibited Error	Cause: Drive is prohibited from rotating the motor in reverse while attempting to perform Inertia Tuning. Solution: – Inertia Auto-Tuning cannot be performed if the drive is restricted from rotating in reverse. – Assuming it is acceptable for the application to rotate in reverse, set b1-04 to 0 and then perform Inertia Tuning.
Er-18 Induction Voltage Error	Cause: The result of Back EMF Constant Tuning (induced voltage) exceeds the allowable setting range. Solution: Double-check the data entered to the T2-oo parameters and restart Auto-Tuning.
Er-19 PM Inductance Error	Cause: The induced voltage constant attempted to set a value to E5-08 or E5-09 that is outside the allowable range. Solution: Double-check the data entered to the T2-oo parameters and restart Auto-Tuning.
Er-20 Stator Resistance Error	Cause: Stator resistance tuning attempted to set a value to E5-06 that is outside the allowable setting range. Solution: Double-check the data entered to the T2-oo parameters and restart Auto-Tuning.
Er-21 Z Pulse Correction Error	Cause & Solution: 1. Motor was coasting when Auto-Tuning was performed. – Make sure the motor has stopped completely. Repeat Auto-Tuning. 2. Either the motor or the PG encoder on the motor is not properly wired. – Check the wiring for the motor and the PG encoder. Repeat Auto-Tuning. 3. The direction for the PG encoder is set incorrectly, or the number of pulses set for the PG encoder is wrong. – Check the direction and number of pulses set for the PG encoder. Repeat Auto-Tuning. 4. PG encoder is damaged. – Check the signal output from the PG encoder attached to the motor. Replace the PG if damaged.
Er-25 High Frequency Injection Parameter Tuning Error	Cause: Motor data was incorrect. Solution: Perform Stationary Auto-Tuning and then perform High Frequency Injection Parameter Tuning again. If the problem continues, high frequency injection control might not be possible with that motor.
CoPy Writing Parameter Settings (flashing)	Cause: Parameters are being written to the drive. Solution: This is not an error.
CPEr Control Mode Mismatch	Cause: Control mode of the parameters to be loaded onto the drive and the control mode set to the drive do not match. Solution: – Verify the control mode for the parameters to be loaded onto the drive and the control mode on drive to which those parameters will be written. – Set the same control mode using parameter A1-02 and retry.
CPyE Error Writing Data	Cause: Failed writing parameters . Solution: Attempt to write parameters again.
CSEr Copy Unit Error	Cause: Hardware fault. Solution: Replace the operator or the USB Copy Unit.
dFPS Drive Model Mismatch	Cause: The drives used in the copy and write process are not the same model. – The drive from which the parameters were copied is a different model. – The drive to be written to is a different model. Solution: – Verify the model number of the drive from which the parameters were copied and the model of the drive to which those parameters will be written. – Make sure the two drives are the same model and have the same software version.
End Task Complete	Cause: Finished reading, writing, or verifying parameters. Solution: This is not an error.
iFEr Communication Error	Cause & Solution: 1. A communication error occurred between the drive and the operator or the USB copy unit. – Check the cable connection. 2. A non-compatible cable is being used to connect the USB Copy Unit and the drive. – Use the cable originally packaged with the USB Copy Unit.
ndAT Model, Voltage Class, Capacity Mismatch	Cause & Solution: 1. The drive from which the parameters were copied and the drive to which the parameters will be written have different electrical specifications, capacities, are set to different control modes, or are different models. – Make sure model numbers and specifications are the same for both drives. 2. The device being used to write the parameters is blank and does not have any parameters saved on it. – Make sure all connections are correct, and copy the parameter settings onto the USB Copy Unit or the operator.
rdEr Error Reading Data	Cause: Failed while attempting to read parameter settings from the drive. Solution: Press and hold the READ key on the USB Copy Unit for at least one second to have the unit read parameters from the drive.
rEAd Reading Parameter Settings (flashing)	Cause: Displayed while the parameter settings are being read onto the USB Copy Unit. Solution: This is not an error.
vAEr Voltage Class Capacity Mismatch	Cause: The drive from which the parameters were copied and the drive on which the Verify mode is being performed have different electrical specifications or are a different capacity. Solution: Make sure electrical specifications and capacities are the same for both drives.
vFyE Parameter settings in the drive and those saved to the copy function are not the same	Cause: Indicates that parameter settings that have been Read and loaded onto the Copy Unit or Digital Operator are different. Solution: To synchronize parameters, either write the parameters saved on the USB Copy Unit or digital operator onto the drive, or Read the parameter settings on the drive onto the USB Copy Unit.
vrFy Comparing Parameter Settings (flashing)	Cause: The Verify mode has confirmed that parameters settings on the drive and parameters read to the copy device are identical. Solution: This is not an error.