Yaskawa GA500 Drive

Yaskawa GA500 Drive Fault Codes:

Fault CodesCause & Solution
bAT
Keypad
Battery
Low Voltage 		Cause: The keypad battery voltage is low.

Solution: Replace the keypad battery.
bCE
Bluetooth
Communication
Fault 		Cause & Solution:

1. The smartphone or tablet with DriveWizard Mobile or DriveWizard installed is too far from the keypad.
– Use the smartphone or tablet 10 m (32.8 ft) or nearer to the keypad.
Note: bCE can occur when the smartphone or tablet is 10 m (32.8 ft) or nearer to the keypad depending on the specifications of the smartphone or tablet.

2. Radio waves from a different device are causing interference with communications between the smartphone or tablet and keypad.
– Make sure that no device around the keypad uses the same radio bandwidth (2400 MHz to 2480 MHz), and prevent radio interference.
boL
Braking
Transistor
Overload
Fault 		Cause & Solution:

1. The duty cycle of the braking transistor is high (the regeneration power or repetition frequency is high).
– Install a braking unit (CDBR-series).
– Install a regenerative converter.
– Increase the deceleration time.

2. You enabled the protective function for the braking transistor when you have a regenerative converter.
– Set L8-55 = 0 [Internal DB TransistorProtection = Disable].

3. The braking transistor in the drive is broken.
– Replace the entire 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:

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 & Solution:

1. Motor parameters are set incorrectly
– Correctly set the motor parameters and do Auto-Tuning again.

2. The torque limit setting is too low.
– Adjust L7-01 to L7-04 [Torque Limit].

3. The load inertia is too large.
– Adjust C1-02, C1-04, C1-06, and C1-08 [Deceleration Times].
– Set the frequency reference to the minimum output frequency, and stop the Run command when the drive stops deceleration.

4. The drive is trying to ramp to stop a machine that cannot do ramp to stop or on a machine for which deceleration is not necessary.
– Correctly set b1-03 [Stopping Method Selection].

5. The motor and drive are connected incorrectly.
– Correct wiring errors.

6. Line-to-line Resistance Tuning is not done.
– Do Stationary Auto-Tuning for Line-to-Line Resistance.

7. The drive received a Run command while the motor was coasting.
– Examine the sequence and input the Run command after the motor fully stops.
– Set b3-01 = 1 [Speed Search at Start Selection = Enabled].
CoF
Current
Offset
Fault		Cause & Solution:

1. The drive starts operation while the induced voltage stays in the motor (during coasting to a stop or after fast deceleration).
– Make a sequence that does not restart operation when induced voltage stays in the motor.
– Set b3-01 = 1 [Speed Search at Start Selection = Enabled].
– Use Speed Search from Fmax or Fref [H1-xx = 61, 62] to do a speed search through one of the external terminals.
Note: When controlling the PM motor, External Speed Search commands 1 and 2 operate the same.

2. A drive hardware problem occurred.
– Do a Fault Reset to clear the fault or de-energize the drive.
– If the fault stays, replace the drive.
CP1
Comparator
1 Limit
Fault 		Cause: The monitor value set in H2-20 [Comparator 1 Monitor Selection] was in the range of H2-21 [Comparator 1 Lower Limit] and H2-22 [Comparator 1 Upper Limit].

Solution: Examine the monitor value and remove the cause of the fault.
CP2
Comparator 2
Limit Fault 		Cause: The monitor value set in H2-26 [Comparator 2 Monitor Selection] was outside the range of H2-27 [Comparator 2 Lower Limit] and H2-28 [Comparator 2 Upper Limit].

Solution: Examine the monitor value and remove the cause of the fault.
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.
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.
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 (Drive
Unit
Signal Fault)		Cause: A drive hardware problem occurred.

Solution:

– Re-energize the drive.
– If the fault stays, replace the control board or the drive.
CPF26
Terminal
Board not
Connected		Cause: A drive hardware problem occurred.

Solution:

– Re-energize the drive.
– If the fault stays, replace the control board or the drive.
CPF38
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.
dCE1
Communication
Error1 		Cause: A drive hardware problem occurred temporarily due to noise.

Solution:

– Remove the cause of the noise.
– If the fault stays, replace the control board or the drive.
dCE2
Communication
Error2 		Cause: A drive hardware problem occurred temporarily due to noise.

Solution:

– Remove the cause of the noise.
– If the fault stays, replace the control board or 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.
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.
dWF1
EEPROM
Memory DWEZ
Data Error		Cause & Solution:

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.
dWF2
DriveWorksEZ
Fault 2 		Cause: There was a fault in the DriveWorksEZ program.

Solution: Examine the DriveWorksEZ program and remove the cause of the fault. This is not a drive fault.
dWF3
DriveWorksEZ
Fault 3 		Cause: There was a fault in the DriveWorksEZ program.

Solution: Examine the DriveWorksEZ program and remove the cause of the fault. This is not a drive fault.
dWFL
DriveWorksEZ
Fault 		Cause: There was a fault in the DriveWorksEZ program.

Solution: Examine the DriveWorksEZ program and remove the cause of the fault. This is not a drive fault.
E5
MECHATROLINK
Watchdog
Timer
Err		Cause: The drive detected a watchdog circuit exception while it received data from the controller.

Solution: Examine the MECHATROLINK cable connection. If this error occurs frequently, examine the wiring and decrease the effects of electrical interference as specified by these manuals:
– MECHATROLINK-II Installation Guide (MECHATROLINK Members Association, manual number MMATDEP011)
– MECHATROLINK-III Installation Manual (MECHATROLINK Members Association, publication number MMATDEP018)
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.

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.
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:

1. The FbH detection level is set incorrectly.
– Adjust b5-36 [PID High Feedback Detection Lvl] and b5-37 [PID High Feedback Detection Time].

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:

1. The FbL detection level is set incorrectly.
– Adjust b5-13 [PID Feedback Loss Detection Lvl] and b5-14 [PID Feedback Loss Detection Time].

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:

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:

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:

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.
LSo
Low Speed
Motor
Step-Out		Cause & Solution:

1. The motor code set incorrectly.
– Set E5-01 [PM Motor Code Selection] correctly as specified by the motor.
– For specialized motors, refer to the motor test report and set E5- xx correctly.

2. The load is too large.
– Decrease the load.
– Replace the drive and motor with larger capacity models

3. An external force on the load side caused the motor to move at start.
– Find and repair problems on the load side that cause the motor to rotate from the load side.

4. The drive incorrectly detected the motor magnetic pole position.
– Set b3-01 = 1 [Speed Search at Start Selection = Enabled].
– If the value for U6-57 [PolePolarityDeterVal] is lower than 819, increase the value set in n8-84 [Polarity Detection Current].

5. The setting of n8-84 [Polarity Detection Current] is too low.
– Increase the n8-84 setting from the default. Consult the motor manufacturer for information about maximum setting values.

6. Incorrect values set in L8-93 [Low Speed Pull-out DetectionTime], L8-94 [Low Speed Pull-out Detect Level], and L8-95 [Low Speed Pull-out Amount].
– Increase the values set in L8-93 to L8-95.

7. The drive incorrectly detected the motor magnetic pole position.
– If you are using an IPM motor, do High Frequency Injection Auto- Tuning.
nSE
Node Setup
Error 		Cause:

– The H1-xx = 47 [Node Setup (CANopen)] terminal was activated during run.
– The drive received a Run command while the Node Setup function was active.

Solution: Stop the drive when the Node Setup function is in use.
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 necessary during acceleration related to the load inertia and the specified acceleration time.
– Increase the values set in C1-01, C1-03, C1-05, or C1-07 [Acceleration Times] to get the necessary torque.
– Increase the values set in C2-01 to C2-04 [S-Curve Characteristics] to get the necessary torque.
– Replace the drive with a larger capacity model.

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 set in C4-01 [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.

11. The gain during overexcitation operation is too large.
– Find the time when the fault occurs.
– If the fault occurs at the same time as overexcitation operation, decrease the value set in n3-13 [OverexcitationBraking (OEB) Gain] and consider the motor flux saturation.

12. The drive received a Run command while the motor was coasting.
– Examine the sequence and input the Run command after the motor fully stops.
– Set b3-01 = 1 [Speed Search at Start Selection = Enabled] or set H1-xx = 61, 62 [Speed Search from Fmax or Fref] to input speed search commands from the MFDI terminals.

13. In PM Control Methods, the setting of the motor code is incorrect.
– Enter the correct motor code to E5-01 [PM Motor Code Selection] as specified by the PM motor.
– For specialized motors, refer to the motor test report and set E5- xx [PM Motor Settings] correctly.

14. The current flowing in the motor is more than the value set in L8-27 [Overcurrent Detection Gain] for PM Control Methods.
– Correct the value set in L8-27.

15. The control method is set incorrectly for the motor.
– Set A1-02 [Control Method Selection] correctly.

16. The motor main circuit cable is too long.
– Replace the drive with a larger capacity model.

17. An overcurrent 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].
oC2
Overcurrent2 		Cause: When A1-02 = 5, 6, 8 [Control Method Selection = OLV/PM, AOLV/PM, or EZOLV], the output current is more than the value set in L8-27 [Overcurrent Detection Gain].

Solution: Correct the value set in L8-27.
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.
oFA01
Option Fault
Connection
Error 		Cause: You changed the option card connected to connector CN5 during operation.

Solution:

1. De-energize the drive.
2. Refer to the option card manual and correctly connect the option card to the connector on the drive.
oFA03
Option Card
Error
Occurred
at Option
Port CN5		Cause: A fault occurred in the option card.

Solution:

1. De-energize the drive.
2. Make sure that the option card is correctly connected to the connector.
3. If the problem continues, replace the option card.
oFA04
Option Card
Error
Occurred
at Option
Port CN5		Cause: A fault occurred in the option card.

Solution:

1. De-energize the drive.
2. Make sure that the option card is correctly connected to the connector.
3. If the problem continues, replace the option card.
oFA05
Option Card
Error
Occurred
at Option
Port CN5		Cause: A fault occurred in the option card.

Solution:

1. De-energize the drive.
2. Make sure that the option card is correctly connected to the connector.
3. If the problem continues, replace the option card.
oFA06
Option Card
Error
Occurred
at Option
Port CN5		Cause: A fault occurred in the option card.

Solution:

1. De-energize the drive.
2. Make sure that the option card is correctly connected to the connector.
3. If the problem continues, replace the option card.
oFA10
Option Card
Error
Occurred
at Option
Port CN5		Cause: A fault occurred in the option card.

Solution:

1. De-energize the drive.
2. Make sure that the option card is correctly connected to the connector.
3. If the problem continues, replace the option card.
oFA11
Option Card
Error
Occurred
at Option
Port CN5		Cause: A fault occurred in the option card.

Solution:

1. De-energize the drive.
2. Make sure that the option card is correctly connected to the connector.
3. If the problem continues, replace the option card.
oFA12
Option Card
Error
Occurred
at Option
Port CN5		Cause: A fault occurred in the option card.

Solution:

1. De-energize the drive.
2. Make sure that the option card is correctly connected to the connector.
3. If the problem continues, replace the option card.
oFA13
Option Card
Error
Occurred
at Option
Port CN5		Cause: A fault occurred in the option card.

Solution:

1. De-energize the drive.
2. Make sure that the option card is correctly connected to the connector.
3. If the problem continues, replace the option card.
oFA14
Option Card
Error
Occurred
at Option
Port CN5		Cause: A fault occurred in the option card.

Solution:

1. De-energize the drive.
2. Make sure that the option card is correctly connected to the connector.
3. If the problem continues, replace the option card.
oFA15
Option Card
Error
Occurred
at Option
Port CN5		Cause: A fault occurred in the option card.

Solution:

1. De-energize the drive.
2. Make sure that the option card is correctly connected to the connector.
3. If the problem continues, replace the option card.
oFA16
Option Card
Error
Occurred
at Option
Port CN5		Cause: A fault occurred in the option card.

Solution:

1. De-energize the drive.
2. Make sure that the option card is correctly connected to the connector.
3. If the problem continues, replace the option card.
oFA17
Option Card
Error
Occurred
at Option
Port CN5		Cause: A fault occurred in the option card.

Solution:

1. De-energize the drive.
2. Make sure that the option card is correctly connected to the connector.
3. If the problem continues, replace the option card.
oFA30
Communication
Option Card
Connection
Error (CN5) 		Cause: A fault occurred in the option card.

Solution:

1. De-energize the drive.
2. Make sure that the option card is correctly connected to the connector.
3. If the problem continues, replace the option card.
oFA31
Communication
Option Card
Connection
Error (CN5) 		Cause: A fault occurred in the option card.

Solution:

1. De-energize the drive.
2. Make sure that the option card is correctly connected to the connector.
3. If the problem continues, replace the option card.
oFA32
Communication
Option Card
Connection
Error (CN5) 		Cause: A fault occurred in the option card.

Solution:

1. De-energize the drive.
2. Make sure that the option card is correctly connected to the connector.
3. If the problem continues, replace the option card.
oFA33
Communication
Option Card
Connection
Error (CN5) 		Cause: A fault occurred in the option card.

Solution:

1. De-energize the drive.
2. Make sure that the option card is correctly connected to the connector.
3. If the problem continues, replace the option card.
oFA34
Option Card
Error
Occurred
at Option
Port CN5		Cause: A fault occurred in the option card.

Solution:

1. De-energize the drive.
2. Make sure that the option card is correctly connected to the connector.
3. If the problem continues, replace the option card.
oFA35
Communication
Option Card
Connection
Error (CN5) 		Cause: A fault occurred in the option card.

Solution:

1. De-energize the drive.
2. Make sure that the option card is correctly connected to the connector.
3. If the problem continues, replace the option card.
oFA36
Communication
Option Card
Connection
Error (CN5) 		Cause: A fault occurred in the option card.

Solution:

1. De-energize the drive.
2. Make sure that the option card is correctly connected to the connector.
3. If the problem continues, replace the option card.
oFA37
Communication
Option Card
Connection
Error (CN5) 		Cause: A fault occurred in the option card.

Solution:

1. De-energize the drive.
2. Make sure that the option card is correctly connected to the connector.
3. If the problem continues, replace the option card.
oFA38
Communication
Option Card
Connection
Error (CN5) 		Cause: A fault occurred in the option card.

Solution:

1. De-energize the drive.
2. Make sure that the option card is correctly connected to the connector.
3. If the problem continues, replace the option card.
oFA39
Communication
Option Card
Connection
Error (CN5) 		Cause: A fault occurred in the option card.

Solution:

1. De-energize the drive.
2. Make sure that the option card is correctly connected to the connector.
3. If the problem continues, replace the option card.
oFA40
Communication
Option Card
Connection
Error (CN5) 		Cause: A fault occurred in the option card.

Solution:

1. De-energize the drive.
2. Make sure that the option card is correctly connected to the connector.
3. If the problem continues, replace the option card.
oFA41
Communication
Option Card
Connection
Error (CN5) 		Cause: A fault occurred in the option card.

Solution:

1. De-energize the drive.
2. Make sure that the option card is correctly connected to the connector.
3. If the problem continues, replace the option card.
oFA42
Communication
Option Card
Connection
Error (CN5) 		Cause: A fault occurred in the option card.

Solution:

1. De-energize the drive.
2. Make sure that the option card is correctly connected to the connector.
3. If the problem continues, replace the option card.
oFA43
Communication
Option Card
Connection
Error (CN5) 		Cause: A fault occurred in the option card.

Solution:

1. De-energize the drive.
2. Make sure that the option card is correctly connected to the connector.
3. If the problem continues, replace the option card.
oH
Heatsink
Overheat 		Cause & Solution:

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.
– Decrease the value set in C6-02 [Carrier Frequency Selection].

3. The internal cooling fan of the drive stopped.
– Use the procedures in this manual to replace the cooling fan.
– Set o4-03 = 0 [Fan Operation Time Setting = 0 h].
oH1
Heatsink
Overheat 		Cause & Solution:

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:

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.
– Increase the values set in C1-01 to C1-08 [Acceleration/ Deceleration Times].
– Set E2-01 [Motor Rated Current (FLA)] correctly to the value specified by the motor nameplate.
– Make sure that the motor cooling system is operating correctly, and repair or replace it if it is damaged.
– 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].

Note: If the values set in E1-08 and E1-10 are too low, the overload tolerance will decrease at low speeds.
oH4
Motor
Overheat
Fault
(PTC Input) 		Cause: The motor has overheated.

Solution:

– Check the load level, acceleration/deceleration time, and motor start/stop frequency (cycle time).
– Decrease the load.
– Increase the values set in C1-01 to C1-08 [Acceleration/ Deceleration Times].
– Set E2-01 [Motor Rated Current (FLA)] correctly to the value specified by the motor nameplate.
– Make sure that the motor cooling system is operating correctly, and repair or replace it if it is damaged.
– 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].

Note: If the values set in E1-08 and E1-10 are too low, the overload tolerance will decrease at low speeds.
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 [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:

1. There is overshoot.
– Decrease C5-01 [ASR Proportional Gain 1] and increase C5-02 [ASR Integral Time 1].
– Adjust the pulse train gain with H6-02 to H6-05 [Pulse Train Input Setting Parameters].

2. There is an incorrect number of PG pulses set in the drive.
– Set H6-02 [Terminal RP Frequency Scaling] to the pulse train frequency during 100% reference (maximum motor rotation speed).

3. The oS detection level is set incorrectly.
– Adjust F1-08 [Overspeed Detection Level] and F1-09 [Overspeed Detection Delay Time].

4. If the drive detects the fault at start or in the low speed range (10% or less) and n8-57 = 1 [HFI Overlap Selection = Enabled] for PM Control methods, the high frequency injection gain is too high.
– Set E5-xx [PM Motor Parameters] correctly or do Rotational Auto-Tuning.
– Decrease the value of n8-41 [HFI P Gain] in 0.5 unit increments.

Note: Set n8-41 > 0.0 for IPM motors.
ov
Overvoltage 		Cause & Solution:

1. The deceleration time is too short and too much regenerative energy is flowing back into the drive.
– Set L3-04 = 1 [Stall Prevention during Decel = General Purpose].
– Increase the values set in C1-02, C1-04, C1-06, or C1-08 [Deceleration Times].
– Connect a dynamic braking option to the drive.

2. The acceleration time is too short.
– Make sure that sudden drive acceleration does not cause the fault.
– Increase the values set in C1-01, C1-03, C1-05, or C1-07 [Acceleration Times].
– Increase the value set in C2-02 [S-Curve Time @ End of Accel].
– Set L3-11 = 1 [Overvoltage Suppression Select = Enabled].

3. The braking load is too large.
– Connect a dynamic braking option to the drive.

4. There are surge voltages in the input power supply.
– Connect a DC link choke to the drive.

5. The drive output cable or motor is shorted to ground (the current short to ground is charging the main circuit capacitor of the drive through the power supply).
– Examine the motor main circuit cable, terminals, and motor terminal box, and then remove ground faults.
– Re-energize the drive.

6. The power supply voltage is too high.
– Decrease the power supply voltage to match the drive rated voltage.

7. The braking resistor or braking resistor unit wiring is incorrect.
– Correct wiring errors in the connection to the braking resistor or braking resistor unit.

8. The encoder cable is disconnected or wired incorrectly.
– Examine for wiring errors or disconnected wires in the encoder cable, and repair problems

9. Noise interference along the encoder cable.
– Isolate the encoder cable from the drive output line or a different source of electrical interference.

10. Electrical interference caused a drive malfunction.
– 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.

11. The load inertia is set incorrectly.
– Examine the load inertia settings with KEB, overvoltage suppression, or stall prevention during deceleration.
– Adjust L3-25 [Load Inertia Ratio] to match the qualities of the machine.

12. There is motor hunting.
– Adjust n1-02 [Hunting Prevention Gain Setting].
– Adjust n2-02 [Automatic Freq Regulator Time 1] and n2-03 [Automatic Freq Regulator Time 2].
– Adjust n8-45 [Speed Feedback Detection Gain] and n8-47 [Pull- in Current Comp Filter Time].
PE1
PLC
Fault 1 		Cause: The communication option detected a fault.

Solution: Refer to the manual for the communication option card.
PE2
PLC Fault 2		Cause: The communication option detected a fault.

Solution: Refer to the manual for the communication option card.
PF
Input Phase
Loss 		Cause & Solution:

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].

5. The main circuit capacitors have become unserviceable.
– Examine the capacitor maintenance time in monitor U4-05 [CapacitorMaintenance]. If U4-05 is more than 90%, replace the control board or the drive.
– If drive input power is correct and the fault stays, replace the control board or the drive.
PGo
Encoder (PG)
Feedback
Loss		Cause: The holding brake is stopping the motor.

Solution: Release the holding brake.
rF
Braking
Resistor
Fault 		Cause & Solution:

1. The resistance of the dynamic braking option that is connected to the drive is too low.
– Use a dynamic braking option that fits the model and duty rating of the drive.

2. A regenerative converter, regenerative unit, or braking unit is connected to the drive.
– Set L8-55 = 0 [Internal DB TransistorProtection = Disable].
rH
Braking
Resistor
Overheat 		Cause & Solution:

1. The deceleration time is too short and excessive regenerative energy is flowing back into the drive.
– Check the load level, deceleration time, and speed.
– Decrease the load.
– Increase the values set in C1-02, C1-04, C1-06, or C1-08 [Deceleration Times].
– Use a dynamic braking option that lets you use more power.

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.

Solution:

– Re-energize the drive.
– If the fault stays, replace the control board or the drive.
SC
Short Circuit
IGBT Failure 		Cause & Solution:

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. 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,

4. When A1-02 = 5, 6, 7 [Control Method Selection = OLV/PM, AOLV/PM, or CLV/PM], the output current is more than the value set in L8-27 [Overcurrent Detection Gain].
– Set L8-27 correctly.
SCF
Safety
Circuit
Fault 		Cause: The safety circuit is broken.

Solution: Replace the control board or the drive.
SEr
Speed
Search
Retries 		Cause & Solution:

1. Exceeded The speed search-related parameters are set incorrectly.
– Decrease b3-10 [Speed Estimation Detection Gain].
– Increase b3-17 [Speed Est Retry Current Level].
– Increase b3-18 [Speed Est Retry Detection Time].
– Do Auto-Tuning again.

2. The motor is coasting in the opposite direction of the Run command.
– Set b3-14 = 1 [Bi-directional Speed Search = Enabled].
STPo
Motor
Step-Out
Detected 		Cause & Solution:

1. The motor code is set incorrectly for PM Control Methods.
– Set E5-01 [PM Motor Code Selection] correctly as specified by the motor.
– For specialized motors, refer to the motor test report and set E5- xx correctly.

2. The load is too large.
– Increase the value set in n8-55 [Motor to Load Inertia Ratio].
– Increase the value set in n8-51 [Pull-in Current @ Acceleration]. If the drive detects STPo during deceleration when increasing the value set in n8-51, set the value of n8-79 [Pull-in Current @ Deceleration] lower than n8-51.
– Decrease the load.
– Replace the drive and motor with larger capacity models.

3. The load inertia is too large.
– Increase the value set in n8-55.

4. The acceleration/deceleration times are too short.
– Increase the values set in C1-01 to C1-08 [Acceleration/ Deceleration Times].
– Increase the value set in C2-01 [S-Curve Time @ Start of Accel]

5. Speed response is too slow.
– Increase the value set in n8-55.
TiM
Keypad
Time Not
Set 		Cause: There is a battery in the keypad, but the date and time are not set.

Solution: Use the keypad to set the date and time.
UL3
Undertorque
Detection 1 		Cause & Solution:

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 [Torque Detection Level 1] and L6-03 [Torque Detection Time 1] settings.
UL4
Undertorque
Detection 2 		Cause & Solution:

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 L6-05 [Torque Detection Level 2] and L6-06 [Torque Detection Time 2] 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].

Solution: Examine the machine for deterioration.
Uv1
DC Bus
Undervoltage 		Cause & Solution:

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 was a loss of power.
– Use a better power supply.

5. The main circuit capacitors have become unserviceable.
– Examine the capacitor maintenance time in monitor U4-05 [CapacitorMaintenance]. If U4-05 is more than 90%, replace the control board or the drive.

6. The relay or contactor on the soft-charge bypass relay is damaged.
– U4-06 [PreChargeRelayMainte] shows the performance life of the soft-charge bypass relay. If U4-06 is more than 90%, replace the board or the drive.
Uv2
Control
Power
Undervoltage 		Cause & Solution:

1. The value set in L2-02 [Power Loss Ride Through Time] increased and the momentary power loss recovery unit is not connected to the drive.
– Connect the momentary power loss recovery unit to the drive.

2. There was a problem with the drive hardware.
– Re-energize the drive.
– If the fault stays, replace the control board or the drive
Uv3
Soft Charge
Answerback
Fault 		Cause & Solution:

1. There is damage to the relay or contactor on the soft- charge bypass relay.
– Re-energize the drive.
– If the fault stays, replace the control board or the drive.
– Monitor U4-06 [PreChargeRelayMainte] shows the performance life of the soft-charge bypass relay. If U4-06 is more than 90%, replace the board or the drive.

2. Air inside the drive is too hot.
– Decrease the ambient temperature of the drive.
AEr
Station
Address
Setting
Error 		Cause: The node address for the communication option is not in the permitted setting range.

Solution:

– For CC-Link communication, set F6-10 [CC-Link Node Address] correctly.
– For MECHATROLINK communication, set F6-20 [MECHATROLINK Station Address] correctly.
– For CANopen communication, set F6-35 [CANopen Node ID Selection] correctly.
bAT
Keypad
Battery
Low Voltage 		Cause: The keypad battery voltage is low.

Solution: Replace the keypad battery.
bb
Baseblock 		Cause: An external baseblock command was entered through one of the MFDI terminals Sx, and the drive output stopped as shown by an external baseblock command.

Solution: Examine the external sequence and timing of the baseblock command input.
bUSy
Busy 		Cause & Solution:

1. You set the drive to use MEMOBUS/Modbus communications to change parameters, but you used the keypad to change parameters.
– Use MEMOBUS/Modbus communications to enter the enter command, then use the keypad to change the parameter.

2. You tried to change a parameter while the drive was changing setting.
– Wait until the process is complete.
CALL
Serial Comm
Transmission
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 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: The drive received a fault reset command when a Run command was active.

Solution: Turn off the Run command then de-energize and re-energize the drive.
CyC
MECHATROLINK
CommCycleSetting
Err 		Cause: The communications cycle setting of the controller is not in the permitted range of the MECHATROLINK interface option.

Solution: Set the communications cycle of the controller in the permitted range of the MECHATROLINK interface option.
CyPo
Cycle Power
to Accept
Changes 		Cause: Although F6-15 = 1 [Comm. Option Parameters Reload = Reload Now], the drive does not update the communication option parameters.

Solution: Re-energize the drive to update the communication option parameters.
dnE
Drive
Disabled 		Cause: A terminal set for H1-xx = 6A [Drive Enable] turned OFF.

Solution: Examine the operation sequence.
dWA2
DriveWorksEZ
Alarm 2 		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.
dWA3
DriveWorksEZ
Alarm 3 		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.
ES
MECHATROLINK
Watchdog
Timer
Err		Cause: The drive detected a watchdog circuit exception while it received data from the controller.

Solution: Examine the MECHATROLINK cable connection. If this error occurs frequently, examine the wiring and decrease the effects of electrical interference as specified by these manuals:
– MECHATROLINK-II Installation Guide (MECHATROLINK Members Association, manual number MMATDEP011)
– MECHATROLINK-III Installation Manual (MECHATROLINK Members Association, publication number MMATDEP018)
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.
EP24v
External
Power
24V Supply 		Cause: The voltage of the main circuit power supply decreased, and the 24 V power supply is supplying power to the drive.

Solution:

– Examine the main circuit power supply.
– Turn ON the main circuit power supply to run the drive.
HCA
High Current
Alarm 		Cause & Solution:

1. The load is too heavy.
– Decrease the load for applications with repetitive starts and stops.
– Replace the drive with a larger capacity model.

2. The acceleration time is too short.
– Calculate the torque necessary during acceleration related to the load inertia and the specified acceleration time.
– Increase the values set in C1-01, C1-03, C1-05, or C1-07 [Acceleration Times] until you get the necessary torque.
– Increase the values set in C2-01 to C2-04 [S-Curve Characteristics] until you get the necessary torque.
– Replace the drive with a larger capacity model.

3. 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

4. The current level temporarily increased because of speed search after a momentary power loss or while trying to Auto Restart.
– If speed search or Auto Restart cause an increase in current, the drive can temporarily show this alarm. The time that the drive shows the alarm is short. No more steps are necessary to clear the alarm.
L24v
Loss of
External
Power 24
Supply 		Cause: The voltage of the backup 24 V power supply has decreased. The main circuit power supply is operating correctly.

Solution:

– Examine the external 24 V power supply for disconnected wires and wiring errors and repair the problems.
– Examine the external 24 V power supply for problems.
LoG
Log Com
Error 		Cause & Solution:

1. There is not a micro SD card in the keypad.
– Put a micro SD card in the keypad.

2. The drive is connected to USB.
– The number of log communication files is more than 1000.
– The micro SD card does not have available memory space.
– The line number data in a log communication file was changed.
– There was a communication error between the keypad and drive during a log communication.
– Set o5-01 = 0 [Log Start/Stop Selection = OFF].
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 control board or the drive.
LT-3
SoftChargeBy
passRelay
MainteTime 		Cause: The soft charge bypass relay is at 90% of its expected performance life.

Solution: Replace the control board or 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.
oH2
External
Overheat
(H1-XX=B) 		Cause: An external device sent an oH2.

Solution:

1. Find the external device that output the overheat alarm.
2. Remove the cause of the problem.
3. Clear the Overheat Alarm (oH2) [H1-xx = B] that was set to MFDI terminals S1 to S7.
ov / ou
Overvoltage 		Cause & Solution:

1. There are surge voltages in the input power supply.
– Connect a DC link choke to the drive.

2. The drive output cable or motor is shorted to ground. (The current short to ground is charging the main circuit capacitor of the drive through the power supply.)
– Examine the motor main circuit cable, terminals, and motor terminal box, and then remove ground faults.
– Re-energize the drive.

3. The power supply voltage is too high.
– Decrease the power supply voltage to match the drive rated voltage.

4. Electrical interference caused a drive malfunction.
– 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.
– Set L5-01 ≠ 0 [Number of Auto-Restart Attempts ≠ 0 times].
ovEr
Too Many
Parameters
Changed 		Cause: You tried to change more than 150 parameters.

Solution: Make sure that parameters that do not have an effect on drive operation are at their default settings.

Note:
– You can change 150 parameters maximum.
– If you change parameters that have dependencies, the drive can detect ovEr when the number of changed parameters is fewer than 150.
PASS
Modbus
Communication
Test 		Cause: The MEMOBUS/Modbus communications test is complete.

Solution: The PASS display will turn off after communications test mode is cleared.
rUn
Motor Switch
during Run 		Cause: The drive received a Motor 2 Selection [H1-xx = 16] during run.

Solution: Make sure that the drive receives the Motor 2 Selection while the drive is stopped.
SE
Modbus Test
Mode Error 		Cause: MEMOBUS/Modbus communications self- diagnostics [H1-xx = 67] was done while the drive was running.

Solution: Stop the drive and do MEMOBUS/Modbus communications self- diagnostics.
SToF
Safe Torque
OFF 		Cause & Solution:

1. One of the two terminals H1-HC or H2-HC received the Safe Disable input signal. The Safe Disable input signal is wired incorrectly.
– Make sure that the Safe Disable signal is input from an external source to terminals H1-HC or H2-HC.
– When the Safe Disable function is not in use, use a jumper to connect terminals H1-HC and H2-HC.

2. There is internal damage to one Safe Disable channel.
– Replace the board or the drive.
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 & Solution:

1. 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.

2. There is a phase loss in the drive input power.
– Correct errors with the wiring for main circuit drive input power.

3. There is loose wiring in the drive input power terminals.
– Tighten the terminal screws to the correct tightening torque.

4. There was a loss of power.
– Use a better power supply.

5. The main circuit capacitors have become unserviceable.
– Examine the capacitor maintenance time in monitor U4-05 [CapacitorMaintenance]. If U4-05 is more than 90%, replace the control board or the drive.

6. The drive input power transformer is too small and voltage drops when the power is switched on.
– Check for an alarm when a molded-case circuit breaker, Leakage Breaker (ELCB, GFCI, or RCM/RCD) (with overcurrent protective function), or magnetic contactor is ON.
– Check the capacity of the drive power supply transformer.

7. Air inside the drive is too hot.
– Check the ambient temperature of the drive.

8. The Charge LED is broken.
– Replace the control board or the entire drive.
oPE01
Drive Capacity
Setting Error 		Cause: The value set in o2-04 [Drive Model (KVA) Selection] does not agree with the drive model.

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.
– Push to show U1-18 [oPE Fault Parameter], and find parameters that are not in the applicable setting range.
– Correct the parameter settings.

2. Set E2-01 ≤ E2-03 [Motor Rated Current (FLA) ≤ Motor No-Load Current].
– Make sure that E2-01 > E2-03.
oPE03
Multi-Function
Input Setting
Err 		Cause & Solution:

1. The settings for these parameters do not agree:
– H1-01 to H1-07 [Terminals S1 to S8 Function Selection]
– H7-01 to H7-04 [Virtual Multi-Function Inputs 1 to 4]

– Correct the parameter settings

2. The settings for MFDIs overlap.

Note: This does not include H1-xx = 20 to 2F [MFDI Function Select = External Fault] and [Reserved].

– Set the parameters correctly to prevent MFDI function overlap.

3. You did not set these pairs of MFDI functions to Digital Inputs (H1-xx and H7-01 to H7-04) at the same time:
– Setting values 10 [Up Command] and 11 [Down Command]
– Setting values 75 [Up 2 Command] and 76 [Down 2 Command]
– Setting values 42 [Run Command (2-Wire Sequence 2)] and 43 [FWD/REV (2-Wire Sequence 2)]

– Set the MFDI pairs.

4. You set a minimum of two of these MFDI combinations to Digital Inputs (H1-xx and H7-01 to H7-04) at the same time:
– Setting values 10 [Up Command] and 11 [Down Command]
– Setting values 75 [Up 2 Command] and 76 [Down 2 Command]
– Setting value A [Accel/Decel Ramp Hold]
– Setting value 1E [Reference Sample Hold]
– Setting values 44 to 46 [Add Offset Frequency 1 to 3 (d7-01 to d7-03)]

– Remove the function settings that are not in use.

5. You set these commands in Digital Inputs (H1-xx and H7-01 to H7-04) at the same time:
– Setting values 61 [Speed Search from Fmax] and 62 [Speed Search from Fref]
– Setting values 65, 66, 7A, 7B [KEB Ride-Thru 1 or 2 Activate] and 68 [High Slip Braking (HSB) Activate]
– Setting values 16 [Motor 2 Selection] and 1A [Accel/Decel Time Selection 2]
– Setting values 65, 66 [KEB Ride-Thru 1 Activate] and 7A, 7B [KEB Ride-Thru 2 Activate]
– Setting values 40, 41 [Forward RUN (2-Wire), Reverse RUN (2-Wire)] and 42, 43 [Run Command (2-Wire Sequence 2), FWD/REV (2- Wire Sequence 2)]
– Setting values 60 [DC Injection Braking Command] and 6A [Drive Enable]
– Setting values 16 [Motor 2 Selection] and 75, 76 [Up 2 Command, Down 2 Command]

– Remove the function settings that are not in use.

6. Settings for N.C. and N.O. input [H1-xx] for these functions were selected at the same time:
– Setting value 15 [Fast Stop (N.O.)]
– Setting value 17 [Fast Stop (N.C.)]

– Remove one of the function settings.

7. You entered these settings while H1-xx = 2 [External Reference 1/2 Selection]:
– b1-15 = 4 [Frequency Reference Selection 2 = Pulse Train Input]
– H6-01 ≠ 0 [Terminal RP Pulse Train Function ≠ Frequency Reference]

– Set H6-01 = 0.

8. You entered these settings while H1-xx = 2 [External Reference 1/2 Selection]:
– b1-15 = 3 [Option PCB] or b1-16 = 3 [Run Command Selection 2 = Option PCB]
– You did not connect an option to the drive.

– Connect an input option to the drive.

10. These parameters are set at the same time:
– H1-xx = 75/76 [Up 2 /Down 2 Command]
– H3-01, H3-09 = 1 [Terminal A1, A2 Signal Level Select = 0 to +10V(Without Limit)]

– Remove one of the function settings.
oPE05
Run Cmd/Freq
Ref Source
Sel Err 		Cause & Solution:

1. The setting to assign the Run command or frequency reference to an option card or the pulse train input is incorrect.
– Correct the parameter settings

2. b1-01 = 3 [Frequency Reference Selection 1 = Option PCB] is set, but there is no option card connected to the drive. b1-02 = 3 [Run Command Selection 1 = Option PCB] is set, but there is no option card connected to the drive.

– Connect an option card to the drive.

3. The following parameters are set at the same time:
• b1-01 = 4 [Pulse Train Input]
• H6-01 ≠ 0 [Terminal RP Pulse Train Function ≠ Frequency Reference]

– Set H6-01 = 0.
oPE07
Analog Input
Selection
Error 		Cause & Solution:

1. The settings for H3-02 and H3-10 [MFAI Function Select] and H7-30 [Virtual Analog Input Selection] overlap.
– Set H3-02, H3-10, and H7-30 correctly to prevent overlap.

Note: It is possible to set these functions to multiple analog input terminals at the same time:
• Setting value 0 [Frequency Reference]
• Setting values F and 1F [Not Used]

2. These parameters are set at the same time:
• H3-02, H3-10, H7-30 = B [PID Feedback]
• H6-01 = 1 [Terminal RP Pulse Train Function = PID Feedback Value]

These parameters are set at the same time:
• H3-02, H3-10, H7-30 = C [PID Setpoint]
• H6-01 = 2 [PID Setpoint Value]

These parameters are set at the same time:
• H3-02, H3-10, H7-30 = C
• b5-18 = 1 [PID Setpoint Selection = Enabled]

These parameters are set at the same time:
• H6-01 = 2
• b5-18 = 1

– Remove the function settings that are not in use.
oPE08
Parameter
Selection
Error		Cause & Solution:

1. A function was set that is not compatible with the control method selected in A1-02 [Control Method Selection].
– Push ENTER Key to show U1-18 [oPE Fault Parameter], and find parameters that are not in the applicable setting range.
– Correct the parameter settings.

2. When A1-02 = 2 [OLV], you used these parameter settings:
• n2-02 > n2-03 [Automatic Freq Regulator Time 1 > Automatic Freq Regulator Time 2]
• C4-02 > C4-06 [Torque Compensation Delay Time > Motor 2 Torque Comp Delay Time]

– Set n2-02 < n2-03.
– Set C4-02 < C4-06.

3. When A1-02 = 0 [V/f], you used these parameter settings:
• H6-01 = 3 [Terminal RP Pulse Train Function = Speed Feedback (V/F Control)]
• H1-xx = 16 [MFDI Function Select = Motor 2 Selection]

– Correct the parameter settings.

4. When A1-02 = 5 [OLV/PM], you set E5-02 to E5-07 [PM Motor Parameters] = 0.
– Set E5-01 [PM Motor Code Selection] correctly as specified by the motor.
– For specialized motors, refer to the motor test report and set E5- xx correctly.

5. When A1-02 = 5, 6 [OLV/PM, AOLV/PM], you used these parameter settings:
• E5-09 = 0.0 [PM Back-EMF Vpeak (mV/(rad/s)) = 0.0 mV/(rad/s)]
• E5-24 = 0.0 [PM Back-EMF L-L Vrms (mV/rpm) = 0.0 mV/min-1]

– Set E5-09 or E5-24 to the correct value.

6. When A1-02 = 5, 6, you set E5-09 ≠ 0 and E5-24 ≠ 0.
– Set E5-09 = 0 or E5-24 = 0.

7. When A1-02 = 6, you set these parameters:
• n8-57 = 0 [HFI Overlap Selection = Disabled]
• You set E1-09 [Minimum Output Frequency] < the 5% value of E1-06.

– Correct the parameter settings.

8. When A1-02 = 6, you set these parameters:
• n8-35 = 0 [Initial Pole Detection Method = Pull- in]
• n8-57 = 1 [Enabled]

– Correct the parameter settings.

9. When A1-02 = 8 [EZOLV], you used these parameter settings:
• E9-01 = 1, 2 [Motor Type Selection = Permanent Magnet (PM), Synchronous Reluctance (SynRM)]
• b3-24 = 2 [Speed Search Method Selection = Current Detection 2]

– When E9-01 = 1 or 2, set b3-24 = 1 [Speed Estimation].
oPE09
PID Control
Selection
Fault 		Cause & Solution:

1. These parameters are set at the same time:
• b5-15 ≠ 0.0 [PID Sleep Function Start Level ≠ 0.0 Hz]
• b1-03 = 2, 3 [Stopping Method Selection = DC Injection Braking to Stop, Coast to Stop with Timer]

– Set b5-15 ≠ 0.0.
– Set b1-03 = 0, 1 [Ramp to Stop, Coast to Stop].

2. These parameters are set at the same time:
• b5-01 = 1, 2 [Enabled (Standard), Enabled (D = Feedforward)]
• d2-02 ≠ 0.0 [Frequency Reference Lower Limit ≠ 0.0%]
• b5-11 = 1 [PID Output Reverse Selection = Negative Output Accepted]

– Correct the parameter settings.

3. These parameters are set at the same time:
• b5-01 = 3, 4 [Trim (Fref+PID Out, D = Fdbk), Trim (Fref+PID Out, D = FeedFwd)]
• d2 -02≠ 0.0 has been set.

– Correct the parameter settings.
oPE10
V/f Data
Setting
Error 		Cause: The parameters that set the V/f pattern do not satisfy these conditions:
– For motor 1: E1-09 ≤ E1-07 < E1-06 ≤ E1-11 ≤ E1-04 [Minimum Output Frequency ≤ Mid Point A Frequency < Base Frequency ≤ Mid Point B Frequency ≤ Maximum Output Frequency]
– For motor 2: E3-09 ≤ E3-07 < E3-06 ≤ E3-11 ≤ E3-04 [Minimum Output Frequency ≤ Mid Point A Frequency < Base Frequency ≤ Mid Point B Frequency ≤ Maximum Output Frequency]

Solution: Set the parameters correctly to satisfy the conditions.
oPE11
Carrier
Frequency
Setting
Error 		Cause: These parameters are set at the same time:
– C6-05 > 6 [Carrier Freq Proportional Gain > 6]
– C6-04 > C6-03 [Carrier Frequency Lower Limit > Carrier Frequency Upper Limit]
– C6-02 to C6-05 settings are not in the applicable setting range.

Solution: Set C6-02 to C6-05 correctly.
oPE13
Pulse
Monitor
Selection
Error 		Cause: H6-06 = 101, 102, 105, or 116 [Terminal MP Monitor Selection = Frequency Reference, Output Frequency, Motor Speed, Output Frequency after Soft Starter] has not been set when H6-07 = 0 [Terminal MP Frequency Scaling = 0 Hz].

Solution: Set H6-06 correctly.
oPE16
Energy Saving
Constants
Error 		Cause: The Energy Saving parameters are not set in the applicable setting range.

Solution: Make sure that E5-xx is set correctly as specified by the motor nameplate data.
oPE33
Digital
Output
Selection
Error 		Cause & Solution:

1. These two parameters are set at the same time:
• H2-60 ≠ F [Term M1-M2 Secondary Function ≠ Not Used]
• H2-01 = 1xx [Term M1-M2 Function Selection = Inverse output of xx]

These two parameters are set at the same time:
• H2-63 ≠ F [Term M3-M4 Secondary Function ≠ Not Used]
• H2-02 = 1xx [Term M3-M4 Function Selection = Inverse output of xx]

These two parameters are set at the same time:
• H2-66 ≠ F [Term M5-M6 Secondary Function ≠ Not Used]
• H2-03 = 1xx [Term M5-M6 Function Selection = Inverse output of xx]

– Clear the H2-01 to H2-03 = 1xx [Inverse output of xx] settings.

Note: It is not possible to set H2-01 to H2-03 = 1xx [Inverse output of xx] when using output functions for logic operations (H2-60, H2-63, H2-66 ≠ F).

2. These parameter pairs are set incorrectly:
• H2-21 [Comparator 1 Lower Limit] > H2-22 [Comparator 1 Upper Limit]
• H2-27 [Comparator 2 Lower Limit] > H2-28 [Comparator 2 Upper Limit]

– Set parameters H2-21 ≤ H2-22.
– Set parameters H2-27 ≤ H2-28.
End1
Excessive
Rated Voltage
Setting 		Cause: The torque reference was more than 20% during Auto-Tuning or the no-load current that was measured after Auto-Tuning is more than 80%.

Solution:

– Make sure that the input motor nameplate data is correct.
– Do Auto-Tuning again and correctly set the motor nameplate data.
– If you can uncouple the motor and load, remove the motor from the machine and do Rotational Auto-Tuning again.
– If you cannot uncouple the motor and load, use the results from Auto-Tuning.
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 Auto-Tuning results were not in the applicable parameter setting range.
– The motor rated slip that was measured after
– Stationary Auto-Tuning was 0.2 Hz or lower.
– The motor rated slip that was measured after compensation with E2-08 [Motor Saturation Coefficient 2] is not in the applicable range.
– The secondary resistor measurement results were not in the applicable range.

Solution:

– Make sure the input motor nameplate data is correct.
– Do Rotational Auto-Tuning again and correctly set the motor nameplate data.
– If you cannot uncouple the motor and load, do Stationary Auto- Tuning 2.
End5
Resistance
Tuning Error		Cause: The Auto-Tuning results of the Line-to-Line Resistance were not in the applicable range.

Solution:

– Make sure that the input motor nameplate data is correct.
– Examine and repair damaged motor wiring.
End6
Leakage
Inductance
Alarm 		Cause: The Auto-Tuning results were not in the applicable parameter setting range.

Solution:

– Make sure that the input motor nameplate data is correct.
– Auto-Tuning again.
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.
End8
HFI Alarm 		Cause:

– Inductance saliency ratio (E5-07/E5-06) is too small.
– The drive cannot find the n8-36 [HFI Frequency Level for L Tuning] value.

Solution:

– Set the correct value on the motor nameplate E5-xx [PM motor parameters] or do Stationary/Rotational Auto-Tuning, and then do High Frequency Injection Tuning again.
– When it is necessary to set n8-35 = 1 [Initial Pole Detection Method = High Frequency Injection] or n8-57 = 1 [HFI Overlap Selection = Enabled], make sure that there is no unusual noise in the low speed range (10% or less) and that the motor does not rotate in reverse at start.

If there is unusual noise in the low speed range (10% or less), increase n8-41 in increments of 0.5. Set n8-41 > 0.0 for IPM motors.
End9
Initial Pole
Detection
Alarm 		Cause: The drive cannot calculate the correct value for n8-84 [Polarity Detection Current] during High Frequency Injection Tuning.

Solution:

– Set the correct value on the motor nameplate E5-xx [PM motor parameters] or do Stationary/Rotational Auto-Tuning, and then do High Frequency Injection Tuning again.
– When n8-35 = 1 [Initial Pole Detection Method = High Frequency Injection] or n8-57 = 1 [HFI Overlap Selection = Enabled], make sure that the motor does not rotate in reverse at start.

If there is unusual noise in the low speed range (10% or less), increase n8-41 in increments of 0.5. Set n8-41 > 0.0 for IPM motors.
Er-01
Motor Data
Error		Cause & Solution:

1. The motor nameplate data entered during Auto- Tuning is incorrect.
– Make sure that the motor nameplate data is correct.
– Do Auto-Tuning again and correctly set the motor nameplate data.

2. The combination of the motor rated power and motor rated current do not match.
– Examine the combination of drive capacity and motor output.
– Do Auto-Tuning again, and correctly set the motor rated power and motor rated current

3. The combination of the motor rated current that was entered during Auto-Tuning and E2-03 [Motor No- Load Current] do not match.
– Examine the motor rated current and the no-load current.
– Set E2-03 correctly.
– Do Auto-Tuning again, and correctly set the motor rated current.

4. The combination of the setting values of Motor Base Frequency and Motor Base Speed do not match.
– Do Auto-Tuning again, and correctly set the Motor Base Frequency and Motor Base Speed.
Er-02
Drive in an
Alarm State 		Cause & Solution:

1. The motor nameplate data entered during Auto- Tuning is incorrect.
– Make sure that the motor nameplate data entered in Auto-Tuning is correct.
– Do Auto-Tuning again and correctly set the motor nameplate data.

2. You did Auto-Tuning while the drive had a minor fault or alarm.
– Clear the minor fault or alarm and do Auto-Tuning again.

3. There is a defective motor cable or cable connection.
– Examine and repair motor wiring.

4. The load is too large.
– Decrease the load.
– Examine the machine area to see if, for example, the motor shaft is locked.

5. The drive detected a minor fault during Auto-Tuning.
– Stop Auto-Tuning.
– Examine the minor fault code and remove the cause of the problem.
– Do Auto-Tuning again.
Er-03
STOP Button
was Pressed		Cause: During Auto-Tuning, was STOP pushed.

Solution: Auto-Tuning did not complete correctly. Do Auto-Tuning again.
Er-04
Line-to-Line
Resistance
Error 		Cause & Solution:

1. The Auto-Tuning results were not in the applicable parameter setting range. Auto-Tuning did not complete in a pre-set length of time. There is a defective motor cable or cable connection.

– Examine and repair motor wiring.
– Disconnect the machine from the motor and do Rotational Auto- Tuning again.

2. 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.
Er-05
No-Load
Current
Error 		Cause & Solution:

1. The Auto-Tuning results were not in the applicable parameter setting range. Auto-Tuning did not complete in a pre-set length of time.
– Examine and repair motor wiring.
– Disconnect the machine from the motor and do Rotational Auto- Tuning again.

2. 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.

3. Rotational Auto-Tuning was done with a load that was more than 30% of the rating connected to the motor.
– Disconnect the machine from the motor and do Rotational Auto- Tuning again.
– If you cannot uncouple the motor and load, make sure that the load is less than 30% of the motor rating. If a mechanical brake is installed in the motor, release the brake during Rotational Auto-Tuning.
Er-08
Rated Slip
Error 		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 did not complete in a pre-set length of time. The Auto-Tuning results were not in the applicable parameter setting range.
– Examine and repair the motor wiring.
– If the motor and machine are connected during Rotational Auto- Tuning, decouple the motor from the machinery.

3. Rotational Auto-Tuning was done with a load that was more than 30% of the rating connected to the motor.
• Disconnect the machine from the motor and do Rotational Auto- Tuning again.
• If you cannot uncouple the motor and load, make sure that the load is less than 30% of the motor rating. If a mechanical brake is installed in the motor, release the brake during Rotational Auto-Tuning.
Er-09
Acceleration
Error		Cause & Solution:

1. The motor did not accelerate for the specified acceleration time.
– Increase the value set in C1-01 [Acceleration Time 1].
– Disconnect the machine from the motor and do Rotational Auto-Tuning again.

2. The value of L7-01 or L7-02 [Forward/Reverse Torque Limit] is small.
– Increase the value set in L7-01 or L7-02.

3. Rotational Auto-Tuning was done with a load that was more than 30% of the rating connected to the motor.
– Disconnect the machine from the motor and do Rotational Auto- Tuning again.
– If you cannot uncouple the motor and load, make sure that the load is less than 30% of the motor rating. If a mechanical brake is installed in the motor, release the brake during Rotational Auto-Tuning.
Er-10
Motor
Direction
Error 		Cause & Solution:

1. There is defective drive and motor wiring.
– Examine and repair motor wiring.

2. There is defective drive and encoder wiring.
– Examine and repair the wiring to the encoder.

3.The machine pulled the motor to rotate in the opposite direction. When the torque reference is 100% or higher, the sign of the speed reference was opposite of the detected speed.
– Disconnect the machine from the motor and do Rotational Auto- Tuning again.
Er-11
Motor Speed
Error 		Cause: The torque reference during acceleration is too high (100%).

Solution:

– Increase the value set in C1-01 [Acceleration Time 1].
– Disconnect the machine from the motor and do Rotational Auto- Tuning again.
Er-12
Current
Detection
Error		Cause & Solution:

1. There is a phase loss in the drive input power. (U/T1, V/T2, W/T3)
– Examine and repair motor wiring.

2. The current exceeded the current rating of the drive. The output current is too low.
– Check the motor wiring for any short circuits between the wires.
– Check and turn ON any magnetic contactors used between motors.
– Replace the control board or the drive.

3. You tried Auto-Tuning without a motor connected to the drive.
– Connect the motor and do Auto-Tuning.

4. There was a current detection signal error.
– Replace the control board or the drive.
Er-13
Leakage
Inductance
Alarm 		Cause & Solution:

1. The motor rated current value is incorrect.
– Correctly set the rated current indicated on the motor nameplate and perform Auto-Tuning again.

2. The drive could not complete tuning for leakage inductance in fewer than 300 seconds.
– Examine and repair motor wiring.
Er-14
Motor Speed
Error 2 		Cause: The motor speed was more than two times the amplitude of speed reference during Inertia Tuning.

Solution: Decrease the value set in C5-01 [ASR Proportional Gain 1]
Er-15
Torque
Saturation
Error 		Cause: During Inertia Tuning, the output torque was more than the value set in L7-01 to L7-04 [Torque Limit].

Solution:

– Increase the value set in L7-01 to L7-04 [Torque Limit] as much as possible.
– Decrease the values set for the frequency and amplitude of the test signals used when doing inertia tuning. First, decrease the test signal amplitude, and then do Inertia Tuning. If the error continues, decrease the test signal frequency and do Inertia Tuning again.
Er-16
Inertia ID
Error 		Cause: The inertia found by the drive was too small or too large during Inertia Tuning (10% or less, or 50000% or more).

Solution:

– Decrease the values set for the frequency and amplitude of the test signals used when doing inertia tuning. First, decrease the test signal amplitude, and then do Inertia Tuning. If the error continues, decrease the test signal frequency and do Inertia Tuning again
– Correctly set the motor inertia as specified by the motor, and do Inertia Tuning again.
Er-17
Reverse
Prohibited
Error 		Cause: b1-04 = 1 [Reverse Operation Selection = Reverse Disabled]

Solution:

1. Enable reverse in the target machine.
2. Set b1-04 = 0 [Reverse Enabled].
3. Do Inertia Tuning again.
Er-18
Back EMF
Error 		Cause: The result of the induced voltage tuning was not in the applicable range.

Solution:

1. Make sure that the input motor nameplate data is correct.
2. Do Auto-Tuning again and correctly set the motor nameplate data.
Er-19
PM
Inductance
Error 		Cause: The Auto-Tuning results of the PM motor inductance were not in the applicable range.

Solution:

1. Make sure that the input motor nameplate data is correct.
2. Do Auto-Tuning again and correctly set the motor nameplate data.
Er-20
Stator
Resistance
Error 		Cause: The Auto-Tuning results of the PM Motor Stator Resistance were not in the applicable range.

Solution:

1. Make sure that the input motor nameplate data is correct.
2. Do Auto-Tuning again and correctly set the motor nameplate data.
Er-25
HighFreq
Inject
Param
Tuning Err 		Cause: The motor data is incorrect.

Solution: Do Stationary Auto-Tuning again.
CPEr
Control
Mode Mismatch 		Cause: The keypad setting and drive setting for A1-02 [Control Method Selection] do not agree.

Solution:

1. Set A1-02 on the drive to the same value that is on the keypad.
2. Restore the parameters.
CPyE
Error
Writing
Data 		Cause: Parameter restore did not end correctly.

Solution: Restore the parameters.
CSEr
Control
Mode
Mismatch 		Cause: The keypad is broken.

Solution: Replace the keypad.
dFPS
Drive
Model
Mismatch		Cause: You tried to restore parameters to a different drive model than the one that you backed up.

Solution:

1. Examine the drive model that you used to back up the parameters.
2. Restore the parameters.
iFEr
Keypad
Communication
Error 		Cause: There was a communications error between the keypad and the drive.

Solution: Examine the connector or cable connection.
ndAT
Error
Received
Data 		Cause: The parameter settings for model and specifications (power supply voltage and capacity) are different between the keypad and the drive.

Solution:

1. Make sure that drive model and the value set in o2-04 [Drive Model (KVA) Selection] agree.
2. Restore the parameters.
PWEr
DWEZ
Password
Mismatch 		Cause: The password set in the backup operation with qx-xx [DriveWorksEZ Parameters] and rx-xx [DriveWorksEZ Connections] is incorrect.

Solution: Set the DWEZ PC software password supplied by Yaskawa for the DWEZ program user ID downloaded to the drive.
rdEr
Error
Reading
Data 		Cause: You tried to back up the data when o3-02 = 0 [Copy Allowed Selection = Disabled].

Solution: Set o3-02 = 1 [Enabled] and back up again.
vAEr
Voltage
Class,
Capacity
Mismatch 		Cause: The power supply specifications or drive capacity parameter settings are different between the keypad and the drive.

Solution:

1. Make sure that drive model and the value set in o2-04 [Drive Model (KVA) Selection] agree.
2. Restore the parameters.
vFyE
Parameters
do not Match 		Cause: The parameters that are backed up in the keypad and the parameters in the drive are not the same.

Solution:

1. Restore or backup the parameter again.
2. Verify the parameters.