Yaskawa V1000 Drive Fault Codes:
| Fault Codes | Cause & Solution |
|---|---|
| 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: 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 three seconds after the Stop command was input and deceleration was not possible in OLV 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. |
| CPF02 A/D Conversion Error | Cause: An A/D conversion error or control circuit error occurred. – Control circuit is damaged. Solution: – Cycle power to the drive. – If the problem continues, replace the control board or the entire drive. |
| CPF03 PWM Data Error | Cause: There is a problem with the PWM data. Solution: 1. Drive hardware is damaged. – Replace the drive. |
| CPF06 Control Circuit Error (EEPROM memory Data Error) | Cause & Solution: 1. The drive power supply was de-energized while a communication option entered a parameter Write command. – Set A1-03 = 2220, 3330 [Initialize Parameters = 2-Wire Initialization, 3-Wire Initialization] and initialize the drive. 2. An EEPROM peripheral circuit error occurred. . – Re-energize the drive – If the fault stays, replace the control board or the drive. |
| CPF07 Terminal Board Communication Error | Cause: There is a faulty connection between the terminal board and the control board. Solution: – Turn off the power and reconnect the terminal board. – If the problem continues, replace the control board or the entire drive. |
| CPF08 EEPROM Serial Communication Fault | Cause: EEPROM communications are not functioning properly. Solution: 1. Terminal board or control board is not connected properly. – Turn the power off and check the control terminal connections. |
| CPF11 RAM Fault | Cause: Hardware is damaged. Solution: Replace the drive. |
| CPF12 FLASH Memory Fault | Cause: Problem with the ROM (FLASH memory) Solution: 1. Hardware is damaged. – Replace the drive. |
| CPF13 Watchdog Circuit Exception | Cause: Self-diagnostics problem. Solution: Hardware is damaged. – Replace the drive. |
| CPF14 Control Circuit Fault | Cause: CPU error (CPU operates incorrectly due to interference, etc.) Solution: 1. Hardware is damaged. – Replace the drive. |
| CPF16 Clock Fault | Cause: Standard clock error. Solution: 1. Hardware is damaged. – Replace the drive. |
| CPF17 Timing Fault | Cause: A timing error occurred during an internal process. Solution: 1. Hardware is damaged. – Replace the drive. |
| CPF18 Control Circuit Fault | Cause: CPU error. Non-Maskable Interrupt (An unusual interrupt was triggered by interference, etc.) Solution: 1. Hardware is damaged. – Replace the drive. |
| CPF19 Control Circuit Fault | Cause: CPU error (Manual reset due to interference, etc.) Solution: 1. Hardware is damaged. – Replace the drive. |
| CPF20 CPF21 | Cause: One of the following faults occurred: RAM fault, FLASH memory error, watchdog circuit exception, clock error – RAM fault. – FLASH memory error (ROM error). – Watchdog circuit exception (self-diagnostic error). – Clock error. Solution: 1. Hardware is damaged. – Replace the drive. |
| CPF21 A/D conversion error | Cause: A drive hardware problem occurred. Solution: – Re-energize the drive. – If the fault stays, replace the control board or the drive. |
| CPF21 PWM Feedback Fault | Cause: PWM Feedback Fault. Solution: – Re-energize the drive. – If the fault stays, replace the control board or the drive. |
| CPF24 Drive Capacity Signal Fault | Cause: The drive capacity cannot be detected correctly (drive capacity is checked when the drive is powered up). Solution: 1. Hardware is damaged. – If the problem continues, replace 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: 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. |
| 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. |
| 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. |
| E5 MECHATROLINK Watchdog Timer Error | Cause: The drive detected a watchdog circuit exception while it received data from the controller. 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: 1. The communication option received an external fault from the controller. – Find the device that caused the external fault and remove the cause. – Clear the external fault input from the controller. 2. A programming error occurred on the controller side. – Examine the operation of the controller program. |
| 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. |
| 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. |
| 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. |
| 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. |
| 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. |
| 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. |
| 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. |
| Err EEPROM Write Error | Cause & Solution: 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. |
| 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: This fault occurs when PID Feedback Loss Detection is programmed to fault (b5-12 = 2) and the PID Feedback < PID Feedback Loss Detection Level (b5-13) for the PID Feedback Loss Detection Time (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. |
| GF Ground Fault | Cause & Solution: A current short to ground exceeded 50% of rated current on the output side of the drive. Setting L8-09 to 1 enables ground fault detection. 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. – If the wiring length of the cable is more than 100 m, decrease the carrier frequency. – 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. There is not balance between the three phases of the PM motor impedance. – Measure the Line-to-Line Resistance for each motor phase and make sure that resistance is equal in the three phases, and that all wires are connected correctly. – Replace the motor. 4. The drive output circuit is broken. – Re-energize the drive. – If the fault stays, replace the control board or the drive. |
| nSE Node Setup Error | Cause: A terminal assigned to the node setup function closed during run. Solution: 1. The node setup terminal closed during Run. – Check whether a Run command was accidentally entered via the terminals or from a comm. option unit. – Turn off the Run command 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 CN5 | Cause: The option connected to connector CN5 is not compatible. Solution: Connect the option to the correct connector. 1. The option card is incompatible with the drive. Use a compatible option card. |
| oFA01 Option Card Fault | Cause & Solution: 1. The option card is not connected properly to the drive. – Turn the power off and reconnect the option card |
| oFA03 Option Card Fault | Cause: Option card self-diagnostic error. Solution: – Cycle power to the drive. – If the problem continues, replace the control board or the entire drive. |
| oFA04 Option Card Fault | Cause: An error occurred attempting to write to the option card memory. Solution: – Cycle power to the drive. – If the problem continues, replace the control board or the entire drive. |
| oFA30 Option Card Communication Fault | Cause: Option card or hardware is damaged. Solution: Replace the option card. |
| oFA31 Option Card Communication Fault | Cause: Option card or hardware is damaged. Solution: Replace the option card. |
| oFA32 Option Card Communication Fault | Cause: Option card or hardware is damaged. Solution: Replace the option card. |
| oFA33 Option Card Communication Fault | Cause: Option card or hardware is damaged. Solution: Replace the option card. |
| oFA34 Option Card Communication Fault | Cause: Option card or hardware is damaged. Solution: Replace the option card. |
| oFA35 Option Card Communication Fault | Cause: Option card or hardware is damaged. Solution: Replace the option card. |
| oFA36 Option Card Communication Fault | Cause: Option card or hardware is damaged. Solution: Replace the option card. |
| oFA37 Option Card Communication Fault | Cause: Option card or hardware is damaged. Solution: Replace the option card. |
| oFA38 Option Card Communication Fault | Cause: Option card or hardware is damaged. Solution: Replace the option card. |
| oFA39 Option Card Communication Fault | Cause: Option card or hardware is damaged. Solution: Replace the option card. |
| oFA40 Option Card Communication Fault | Cause: Option card or hardware is damaged. Solution: Replace the option card. |
| oFA41 Option Card Communication Fault | Cause: Option card or hardware is damaged. Solution: Replace the option card. |
| oFA42 Option Card Communication Fault | Cause: Option card or hardware is damaged. Solution: Replace the option card. |
| oFA43 Option Card Communication Fault | Cause: Option card or hardware is damaged. Solution: Replace the option card. |
| 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 temperature of the heatsink has exceeded 10 °C plus the default value of L8-02. 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 or A2 exceeded the alarm detection level. Detection requires multi-function analog input H3-02 or H3-10 be set 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). This will mainly involve reducing E1-08 and E1-10. Be careful not to lower E1-08 and E1-10 excessively, as this reduces load tolerance at low speeds. |
| oH4 Motor Overheat Fault (PTC Input) | Cause & Solution: The motor overheat signal to analog input terminal A1 or A2 exceeded the alarm detection level. Detection requires multi-function analog input H3-02 or H3-10 be set 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). This will mainly involve reducing E1-08 and E1-10. Be careful not to lower E1-08 and E1-10 excessively, as this reduces load tolerance at low speeds. |
| oL1 Motor Overload | Cause & Solution: 1. Cycle times are too short during acceleration and deceleration. – Increase the acceleration and deceleration times (C1-01 through C1-08). 2. Drive overloaded at low speeds. – Overload may occur at low speeds when using a general-purpose motor, even if operating within the rated current limitation. – Reduce the load. – Increase the speed. – If the drive is supposed to operate at low speeds, either increase the motor capacity or use a motor specifically designed to operate with the drive. 3. Although a special type of motor is being used, the motor protection selection is set for a general-purpose motor (L1-01 = 1). – Set L1-01 to 2. 4. Voltage is too high for the V/f characteristics. – Adjust the user set V/f patterns (E1-04 through E1-10). Parameters E1-08 and E1-10 may need to be reduced. – If E1-08 and E1-10 are set too high, there may be very little load tolerance at low speed. 5. The wrong motor-rated current is set to E2-01. – Check the motor-rated current. – Enter the value written on the motor nameplate to parameter E2-01. 6. The motor base frequency for the drive input power is set too low. – Check the rated frequency indicated on the motor nameplate. – Enter the rated frequency to E1-06 (Base Frequency). 7. Multiple motors are running off the same drive. – Set L1-01 to 0 to disable the Motor Protection function and install a thermal relay to each motor. 8. The electrical thermal protection characteristics and motor overload characteristics do not match. – Check the motor characteristics. – Correct the value set to L1-01 (Motor Protection Function). – Install an external thermal relay. 9. Motor overheated by overexcitation operation. – Overexcitation increases the motor losses and the motor temperature. If applied too long, motor damage can occur. Prevent excessive overexcitation operation or apply proper cooling to the motor – Reduce the excitation deceleration gain (n3-13). – Set L3-04 (Stall Prevention during Deceleration) to a value other than 4. 10. Output current fluctuation due to input phase loss – Check the power supply for phase loss. |
| 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 [Mechanical Fatigue Detect Select]. Solution: Do a deterioration diagnostic test on the machine side. |
| oL7 High Slip Braking Overload | Cause & Solution: 1. The load inertia is too large. An external force on the load side rotated the motor. Something is preventing deceleration on the load side. – Decrease deceleration times in C1-02, C1-04, C1-06, and C1-08 [Deceleration Times] for applications that do not use High Slip Braking. – Use a braking resistor to decrease the deceleration time. 2. The value set in n3-04 [HSB Overload Time] is too small. – Increase the value set in n3-04. – Connect a thermal overload relay to the motor, and set n3-04 = 1200 s (maximum value). |
| oPr Keypad Connection Fault | Cause & Solution: 1. The keypad is not securely connected to the connector on the drive. – Examine the connection between the keypad and the drive. 2. The connection cable between the drive and the keypad is disconnected. – Remove the keypad and then reconnect it. – Replace the cable if damaged. |
| oS Overspeed | Cause & Solution: Pulse input (RP) indicates that motor speed feedback exceeded F1-08 setting. 1. Overshoot or undershoot is occurring. – Adjust the gain by using the pulse train input parameters (H6-02 through H6-05). – Increase the settings for C5-01 (Speed Control Proportional Gain 1) and reduce C5-02 (Speed Control Integral Time 1). 2. Incorrect PG pulse settings. – Set the H6-02 (Pulse Train Input Scaling) = 100%, the frequency of the PG pulses at maximum motor speed. 3. Inappropriate parameter settings. – Check the setting for the overspeed detection level and the overspeed detection time (F1-08 and F1-09). |
| ov / ou Overvoltage | Cause: Voltage in the DC bus has exceeded the overvoltage detection level. – For 200 V class: approximately 410 V – For 400 V class: approximately 820 V (740 V when E1-01 is less than 400) Solution: 1. Deceleration time is too short and regenerative energy flows from the motor into the drive. – Increase the deceleration time (C1-02, C1-04, C1-06, C1-08). – Install a braking resistor or a dynamic braking resistor unit. – Enable stall prevention during deceleration (L3-04 = “1”). Stall prevention is enabled as the default setting. 2. Fast acceleration time causes the motor to overshoot the speed reference. – Check if sudden drive acceleration triggers an overvoltage alarm. – Increase the acceleration time. – Use longer S-curve acceleration and deceleration times. 3. Excessive braking load. The braking torque was too high, causing regenerative energy to charge the DC bus. – Reduce the braking torque, use a braking option, or lengthen decel time. 4. Surge voltage entering from the drive input power. – Install a DC link choke. Note: Voltage surge can result from thyristor convertor and phase advancing capacitor using same drive main input power supply. 5. Ground fault in the output circuit causing the DC bus capacitor to overcharge. – Check the motor wiring for ground faults. – Correct grounding shorts and turn the power back on. 6. Improper Setting of Speed Search related parameters. (Includes Speed Search after a momentary power loss and after a fault restart.) – Check the settings for Speed Search related parameters. – Enable Speed Search Retry function (b3-19 greater than or equal to 1 to 10). – Adjust the current level during Speed Search and the deceleration time (b3-02 and b3-03 respectively). – Perform Line-to-Line Resistance Auto-Tuning and then enable Speed Estimation Type Speed Search (b3-24 = 1). 7. Excessive regeneration when overshoot occurs after acceleration. – Enable the Overvoltage Suppression function (L3-11 = 1). – Lengthen the S-curve at acceleration end. 8. Drive input power voltage is too high. – Check the voltage. – Lower drive input power voltage within the limits listed in the specifications. 9. The dynamic braking transistor is damaged. – Replace the drive. 10. The braking transistor is wired incorrectly. – Check braking transistor wiring for errors. – Properly rewire the braking resistor device. |
| PF Input Phase Loss | Cause & Solution: Drive input power has an open phase or has a large imbalance of voltage between phases. Detected when L8-05 = 1 (enabled). 1. There is a phase loss in the drive input power. – Correct errors with the wiring for main circuit drive input power. 2. There is loose wiring in the drive input power terminals. – Tighten the terminal screws to the correct tightening torque. 3. The drive input power voltage is changing too much. – Examine the input power for problems. – Make the drive input power stable. – If the input power supply is good, examine the magnetic contactor on the main circuit side for problems. 4. There is unsatisfactory balance between voltage phases. – Examine the input power for problems. – Make the drive input power stable. – Set L8-05 = 0 [Input Phase Loss Protection Sel = Disabled]. |
| 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. |
| rH Braking Resistor Overheat | Cause & Solution: Braking resistor protection was triggered. Fault detection is enabled when L8-01 = 1 (disabled as a default). 1. The deceleration time is too short and excessive regenerative energy is flowing back into the drive. – Check the load, deceleration time, and speed. – Reduce the load inertia. – Increase the deceleration times (C1-01 to C1-08). – Replace the dynamic braking option with a larger device that can handle the power that is discharged. 2. The duty cycle is too high. – Examine the duty cycle. 3. The braking load is too heavy. – Calculate the braking load and braking power again, and decrease the braking load. – Use a braking resistor that improves braking power 4. The braking resistor is not sufficient. – Use the braking resistor specifications to select a sufficient braking resistor |
| rr Dynamic Braking Transistor Fault | Cause: The drive control circuit is damaged. There is a malfunction in the internal braking transistor of the drive. The built-in dynamic braking transistor failed. Solution: – Re-energize the drive. – If the fault stays, replace the control board or the drive. |
| SC Short Circuit IGBT Failure | Cause & Solution: Short circuit or ground fault is detected. 1. The drive is damaged. – Check the drive output side short circuit for a broken output transistor. 2. Motor has been damaged from overheat or the motor insulation has been weakened. – Check the motor insulation resistance and replace the motor if continuity is detected. 3. The cable is damaged and is coming into contact with something causing a short circuit. – Check the motor power cable and repair any short circuits. 4. Hardware fault. – A short circuit or grounding fault on the drive output side has damaged the output transistors. |
| 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. |
| 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). |
| 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 DC Bus Undervoltage | Cause: One of the following conditions occurred while the drive was in operation: – Voltage in the DC bus fell below the undervoltage detection level (L2-05). – For 200 V class: approximately 190 V (160 V for single phase drives) – For 400 V class: approximately 380 V (350 V when E1-01 is less than 400) The fault is output only if L2-01 = 0 or L2-01 = 1 and the DC bus voltage is under L2-05 for longer than L2-02. 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 main circuit capacitors are worn – Check the maintenance time for the capacitors (U4-05). – Replace either the control board or the entire drive if U4-05 exceeds 90%. 6. The relay or contactor on the soft-charge bypass relay is damaged – Cycle power to the drive and see if the fault reoccurs. – Check monitor U4-06 for the performance life of the soft-charge bypass relay. – Replace either the control board or 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. L2-02 changed from its default value in drive that is 7.5 kW or smaller without installing a Momentary Power Loss Ride-Thru. – Correct parameter L2-02 setting or install optional Momentary Power Loss Ride-Thru unit. 2. The wiring for the control power supply is damaged. – Cycle power to the drive. Check if the fault reoccurs. – Replace the drive if the fault continues to occur. 3. Internal circuitry is damaged. – Cycle power to the drive. Check if the fault reoccurs. – Replace the drive if the fault continues to occur. |
| Uv3 Undervoltage 3 (Inrush Prevention Circuit Fault) | Cause: The inrush prevention circuit has failed. – The contactor on the inrush prevention circuit is damaged. Solution: – Cycle power to the drive. Check if the fault reoccurs. – Replace the drive if the fault continues to occur. – Check monitor U4-06 for the performance life of the inrush prevention circuit. – Replace the 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 if a CC-Link option card is used – Set parameter F6-20 to the proper value if a MECHATROLINK option card is used. – Set parameter F6-35 to the proper value if a CANopen option card is used. |
| 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 S7). 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. |
| E5 MECHATROLINK Watchdog Timer Error | Cause: The watchdog timer expired while waiting for data from the controller. Solution: Issue a DISCONNECT or ALM_CLR command, followed by a CONNECT or SYNC_SET command and move to phase 3. |
| Hbb Safe Disable Signal Input | Cause: The Safe Disable Input channel is open. Solution: 1. There is no signal at terminal H1. – Check if external safety circuit tripped and disabled the drive. If the Safe Disable function is not utilized, check if the terminals HC, H1, and H2 are linked. 2. Internally, the Safe Disable channel is broken. – Replace the drive. |
| HbbF Safe Disable Signal Input | Cause: The safe disable input hardware is defective. Solution: 1 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. Set o4-03 = 0 [Fan Operation Time Setting = 0 h] to reset the cooling fan operation time. |
| 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. |
| LT-4 IGBT Maintenance Time (50%) | Cause: The IGBT is at 50% of its expected performance life. Solution: Check the load, carrier frequency, and output frequency. |
| oH Heatsink Overheat | Cause: The temperature exceeded the value set to L8-02. Solution: 1. Surrounding temperature is too high – Check the surrounding temperature. – Improve the air circulation within the enclosure panel. – Install a fan or air conditioner to cool surrounding area. – Remove anything near drive that may cause extra heat. 2. Internal cooling fan has stopped. – Replace the cooling fan. – After replacing the fan, reset the cooling fan maintenance parameter to (o4-03 = “0”). 3. Airflow around the drive is restricted. – Provide proper installation space around the drive as indicated in the manual. – Allow for the specified space and ensure that there is sufficient circulation around the control panel. – Check for dust or foreign materials clogging cooling fan. – Clear debris caught in the fan that restricts air circulation. |
| oH2 Heatsink Overheat Warning | Cause: “Heatsink Overheat Warning” was input to a multi-function input terminal, S1 through S7 (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. |
| TrPC IGBT Maintenance Time (90%) | Cause: The IGBT is at 90% of its expected performance life. Solution: Replace the IGBT or the drive. |
| Uv Undervoltage | Cause: One of the following conditions was true when the drive was stopped and a run command was entered: – DC bus voltage dropped below the level specified in L2-05. – Contactor to suppress inrush current in the drive was open. – 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 specified in this manual to fasten the terminals. 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 the drive if U4-05 exceeds 90%. 5. The drive input power transformer is not large enough and voltage drops when the power is switched on. – Check for a tripped alarm when the magnetic contactor, line breaker and leakage breaker are turned on. – Check the capacity of the drive input power transformer. 6. Air inside the drive is too hot. – Check the temperature inside the drive. 7. The CHARGE indicator light is broken or disconnected. – Replace the drive. |
| 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 H1-07. 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). – Correctly set functions that need to be enabled in combination with other functions. 3. Run/Stop command for a 2-Wire sequence 2 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). – Correctly set functions that need to be enabled in combination with other functions. 4. Two of the following functions are set at the same time: • 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 been assigned to the multi-function input terminals at the same time. – Correct setting errors. 5. The Up/Down command (10, 11) is enabled at the same time as PID control (b5-01). – Set b5-01 to 0 to disable PID control or disable the Up/Down command. |
| oPE04 Initialization Required | Cause: The drive, control board, or terminal board have 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: Run Command/Frequency Reference Source Selection Error 1. Frequency reference is assigned to an option card (b1-01 = 3) that is not connected to the drive. – Reconnect the input option card to the drive. 2. The Run command is assigned to an option card (b1-02 = 3) that is not connected to the drive. 3. Frequency reference is assigned to the pulse train input (b1-01 = 4), but terminal RP is not set for pulse train input (H6-01 > 0) – Set H6-01 to 0. |
| oPE07 Multi-Function Analog Input Selection Error | Cause: A contradictory setting is assigned to multi-function analog inputs H3-02 through to H3-10 and PID functions conflict. Solution: 1. H3-02 and H3-10 are set to the same value. – Change the settings to H3-02 and H3-10 so that functions no longer conflict. 2. The following simultaneous contradictory settings: H3-02 or H3-10 = B (PID Feedback) H6-01 (Pulse Train Input) = 1 (PID Feedback) Disable one of the PID selections. – Disable one of the PID selections. 3. The following simultaneous contradictory settings: H3-02 or H3-10 = C (PID Target Value) H6-01 = 2 (pulse train input sets the PID target value) – Disable one of the PID selections. 4. The following simultaneous contradictory settings: H3-02 or H3-10 = C (PID Target Value) b5-18 = 1 (enables b5-19 as the target PIDvalue) – Disable one of the PID selections. 5. The following simultaneous contradictory settings: H6-01 or H3-10 = C (PID Target Value) 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. Simple V/f with PG was enabled while not in V/f Control (H6-01 = 3). – To use Simple V/f with PG, ensure the motor control method has been set to V/f Control (A1-02 = 0). 3. In Open Loop Vector Control, n2-02 is greater than n2-03 – Correct parameter settings so that n2-02 is less than n2-03. 4. In Open Loop Vector Control, C4-02 is greater than C4-06 – Correct parameter settings so that C4-02 is less than C4-06. 5. In OLV/PMl, 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-oo in accordance with the Test Report provided. |
| 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: – b5-15 not 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. – Set the stopping method to coast to stop or ramp to stop (b1-03 = 0 or 1) 2. D control is being used on the setpoint deviation (b5-01 = 1) or on the feedback value (b5-01 = 2). A negative PID output value is set to operate the drive in reverse (b5-11 = 1) and the frequency reference lower limit greater than 0 (d2-02 > 0). – Set parameters b5-01, b5-11, and d2-02 to the proper values. |
| 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. |
| 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. |
| 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. |
| 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 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-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 |