CIMR-G7C4037 Yaskawa Electric AC VFD Variable Frequency Drive Repair

SKU: 37126

CIMR-G7C4037 Yaskawa Electric AC VFD Variable Frequency Drive Repair

Industrial VFD Repair Service – Save Big and Keep Your Settings. Our services are fast and easy. Send us your failed VFD Variable Frequency Drive. We will quickly repair your faulty VFD. We provide a quick turnaround time and a high repair success rate at a low repair cost.
UpFix is NOT an authorized distributor for Yaskawa Electric.

Experience the most cost-effective and efficient solution for your industrial VFD issues with UpFix expert repair service. By choosing to repair your original VFD, you not only save significantly compared to the cost of buying a new unit, but you also retain all the custom programming and configurations specific to your operational needs.

Estimated Repair Time is 3-5 business days.
2 Year Warranty
Real-Time Repair Tracking
Our service is 100% guaranteed or your money back. Order today and save!

International Shipping Available:
Ships to USA and Canada

Free shipping available at online checkout!

$911.64

Repair yours

Send your original part for repair service

$911.64

Service Price:

Options Price:

Total:

In-stock item

Send me a good working part

Description Warranty How It Works Error Codes Models

Description

This is a repair service for CIMR-G7C4037 Yaskawa Electric AC VFD Variable Frequency Drive Repair.
UpFix is NOT an authorized distributor for Yaskawa Electric.

This repair is also for the following similar VFD model numbers:
CIMRG7C4037.

Wide Range of Supported VFDs:

Our repair services cover various makes and models, providing a dependable solution for virtually any type of VFD you might be using in your operations.

Why Repairing Your VFD with UpFix is the Better Choice:

Cost Efficiency: Save up to 80%. Repairing a VFD is significantly more cost-effective than replacing it. Our services can save your business substantial expenditure, preserving capital for other strategic investments.
Minimized Downtime: A malfunctioning VFD can halt production lines and disrupt operations. Our efficient repair process gets your systems back up and running quickly, reducing downtime and lost productivity.
Eco-Friendly: Repairing your appliance with UpFix is a step towards sustainability. By refurbishing your existing control board, you help reduce electronic waste and conserve natural resources, supporting environmental conservation efforts.

Our Expert VFD Repair Process:

When you send your VFD to UpFix, it undergoes a thorough diagnostic process to identify both evident and potential issues. We repair and replace defective components, and also proactively upgrade components that are known to fail over time. This comprehensive approach ensures extended reliability and performance of your VFD.

How It Works:

Once we receive your part, our trained and IPC certified technicians will run tests to identify the source of the problem. We will rebuild your part, replacing not only the failed components, but all components that are usually known to fail or go bad in this part. We want to make your experience as effortless as possible. All you have to do is send your part to us. Then after receiving the part back from us, just reinstall it and you’re back in business!

What You Can Expect from UpFix:

Send your faulty VFD to our repair center.
Our expert technicians will repair, test, and calibrate your VFD to ensure it meets all operational standards.
Receive your VFD back and reintegrate it into your system with confidence in its functionality.
No Reconfiguration Needed

Added Benefits of Choosing UpFix:

Estimated Repair Time is 3-5 business days.
International shipping options to the USA and Canada.
Comprehensive testing post-repair to guarantee performance.
A 24-month warranty and lifetime phone support, underlining our commitment to quality and customer satisfaction.
We uphold the highest standards of integrity and community support in all our business practices.

Additional Benefits of Choosing UpFix:

Estimated Repair Time is 3-5 business days.
Fast turnaround times to help keep your operations smooth.
Service available across the USA and Canada with reliable shipping options.
Each VFD is thoroughly tested post-repair to ensure it passes all performance and safety tests.
24-month warranty and lifetime technical support guarantee your satisfaction and peace of mind.
We are committed to the highest standards of service and customer satisfaction.

We take pride in our work and will take it a step further and fully inspect your control board and will replace failure prone components or parts that may be failing in the future. Each control board is fully tested to make sure it passes a full functional test.

Our service is 100 percent guaranteed or your money back. We stand by our services – If the part is going to fail, itll fail within the first 24 months. Thats why we got you covered with a 24-month warranty and lifetime phone support when you need us

Our goal is to save you hundreds of dollars, while continuing to provide an eco-friendly solution that reduces pollution. We drive our business towards consistent and profitable growth, with integrity and a commitment to the people and communities where we live and work. Our service is 100% guaranteed or your money back.

This repair service will fix these issues:

Auto Tune Failure
Checksum Fault
Does Not Enable
Does Not Power
Fails Under Load
Fans Not Turning On
Ground Fault
Heatsink Fault
I/O Terminal Not Working
Input Phase Fault
Keypad Issue
Keys Dont Press
No Output
Output Phase Fault
Output Runs Erratically
Overcurrent Fault
Overvoltage Fault
Power Loss
Undervoltage Fault
Unit Had Blown Up
Unit Smoked

Cost-Effective
Repairing your existing VFD can be substantially more affordable than purchasing a new one. Enjoy significant savings while maintaining optimal functionality.

No Reconfiguration Needed
One of the biggest advantages of repairing your original VFD is the elimination of reprogramming. Your VFD will be returned to you with all its original settings intact, ensuring a seamless reintroduction into your system without the need for costly and time-consuming reconfiguration.

Quick Turnaround
We understand the importance of minimizing downtime. Our skilled technicians ensure a quick and efficient repair process, getting your operations back up and running in no time.

Quality Assurance
We use only the highest quality parts and the latest techniques in our repair processes, ensuring your VFD returns to you in top-notch condition, often better than its pre-fault state.

Extended Life for Your Equipment
Repairing and maintaining your existing VFD can significantly extend its life, making it a sustainable choice for your business and the environment.

Expert Support
Our team of experienced technicians is well-versed in a wide range of VFD brands and models, providing you with knowledgeable support and advice every step of the way.

Our Commitment
At UpFix, we are committed to providing you with a reliable, high-quality repair service that keeps your operations smooth and efficient. Trust us to restore your VFD to its optimal performance, ensuring your business runs uninterrupted.

Will this service fix my problems?

A full diagnostic check should first be performed to eliminate all other possible causes for your symptoms, even if the symptoms match those specified on the common fault description.

If you send a unit in good working condition due to misdiagnosis, and our testing determines that there are no issues or faults with the unit, or if the part is beyond repair, then you will only be responsible for the shipping costs and a bench test fee of $39.99 may be applied.

IMPORTANT! If you are not sure that this part is the cause of the fault then we recommend that you do not go ahead with this purchase and instead seek further professional advice and diagnosis.

Benefits of using us:

Free round trip shipping
Fast & easy process
High quality components
100% guaranteed or your money back
Save hundreds of dollars
Amazing customer service and support
No programming needed
Plug-n-play
Refurbished and tested to meet manufacturers specifications
IPC certified technicians (highest standard of quality craftsmanship)
Hassle-free warranty that is much better than the warranties you get for new replacements.

Warranty

Our service is 100 percent guaranteed or your money back.

For a full 24 months, our no-hassle warranty covers the repair. We will fix the item again if the repair fails within 24 months. If the component is not repairable, we will, at our discretion, either replace the part entirely or refund the cost of the repair.

We stand by our services – If the part is going to fail, itll fail within the first 3 months. Thats why we got you covered with a 24-month warranty and lifetime phone support when you need us

How It Works

How it works

Our services are fast and easy. Reducing downtime is extremely important to us. Our standard repair is usually under 1 week. Meanwhile, offering a high-quality repair service with a focus on quick, long-lasting repairs at competitive prices.

We take pride in our work and not only fully inspecting/repairing your faulty part, but will take it a step further and will replace failure prone components or parts that may be failing in the future. Each control board is fully tested to make sure it passes a full functional test. Our service is 100 percent guaranteed or your money back.

Carefully remove your part.
Securely pack your part, using the correct box so that your part cannot be damaged in transit. Take special care when packing.
Add item to shopping cart and check out. We will provide you with shipping label to send the part to us. You will not need to pay anything until your part is full repaired.
Inside the package include: Your Name, Return Address, Phone Number.

International Shipping Available

Error Codes

Code	Description	Recommended Action
Accelerate	Acceleration error (detected only for rotational autotuning)	CAUSE: 1) The motor did not accelerate in the specified time. SOLUTION: 1) • Increase C1-01 (Acceleration Time 1). • Increase L7-01 and L7-02 (Reverse Torque Limits) if they are low. • If the motor is connected to the machine, disconnect it.
Adjusted Slip Value	Adjusted slip value fell below lower limit	CAUSE: 1) As a result of stationary autotuning 1, the slip value has fallen to 0.2 Hz or below. SOLUTION: 1) - Check the input data. - If rotational autotuning is possible, perform it. If impossible, perform stationary autotuning 2
AER (blinking) SI-T Address Err	SI-T Station Number Setting Error Station number of SI-T option board was out of setting range.	CAUSE: 1) Station number setting error. 2) Circuit of SI-T option board is faulty, SOLUTION: 1) Check the setting of the station number. 2) Check the communications devices and signals.
BB (blinking) Baseblock	Receiving External Baseblock Command An external baseblock signal was input from a multi-function input terminal, and the Inverter output was shut down.	CAUSE: 1) An external baseblock signal was input from a multi-function input terminal. SOLUTION: 1) Check the external sequence
BUS (blinking) Option Com Err	Option Board Communications Error A communications error occurred in a mode where the Run Command or a frequency reference is set from an Communications Option Board.	CAUSE: 1) - SOLUTION: 1) Check the communications devices and signals.
BUS Option Com Err	Option Communications Error A communications error was detected during a Run Command or while setting a frequency reference from a Communications Option Board.	CAUSE: 1) - SOLUTION: 1) Check the communications devices and communications signals
CALL (blinking) Com Call	Communications on Standby Control data was not normally received when power was turned ON.	CAUSE: 1) - SOLUTION: 1) Check the communications devices and signals.
CE (blinking) MEMOBUS Com Err	MEMOBUS Communications Error Normal reception was not possible for 2 s or longer after received control data.	CAUSE: 1) - SOLUTION: 1) Check the communications devices and signals.
CE Memobus Com Err	MEMOBUS Communications Error A normal reception was not possible for 2 s or longer after control data was received once	CAUSE: 1) - SOLUTION: 1) Check the communications devices and communications signals
CF Out of Control	Control Fault The torque limit was reached continuously for 3 seconds or longer during a deceleration stop during open-loop vector 1 control.	CAUSE: 1) Motor constant settings are not correct. SOLUTION: 1) • Check the motor constants. • Perform autotuning.
CPE ID UNMATCH	ID not matched	CAUSE: 1) The Inverter product code or software number is different. SOLUTION: 1) Use the copy function for the same product code and software number.
CPE ID UNMATCH	ID not matched	CAUSE: 1) The Inverter product code or software number is different. SOLUTION: 1) Use the copy function for the same product code and software number.
CPF00 COM-ERR (OP & INV)	CPU External RAM Fault	CAUSE: 1) - 2) The control circuits were destroyed. SOLUTION: 1) Try turning the power supply off and on again. 2) Replace the Inverter.
CPF00 COM-ERR (OP & INV)	Digital Operator Communications Error 1 Communications with the Digital Operator were not established within 5 seconds after the power was turned on.	CAUSE: 1) The Digital Operator's connector isn't connected properly. 2) The Inverter's control circuits are faulty. SOLUTION: 1) Disconnect the Digital Operator and then connect it again. 2) Replace the Inverter.
CPF01 COM-ERR (OP & INV)	Digital Operator Communications Error 2 After communications were established, there was a communications error with the Digital Operator for more than 2 seconds.	CAUSE: 1) The Digital Operator isn't connected properly. 2) The Inverter's control circuits are faulty. SOLUTION: 1) Disconnect the Digital Operator and then connect it again. 2) Replace the Inverter.
CPF02 BB Circuit Err	Baseblock Circuit Error	CAUSE: 1) - 2) The control circuit is damaged. SOLUTION: 1) Try turning the power supply off and on again. 2) Replace the Inverter.
CPF03 EEPROM Error	EEPROM Error	CAUSE: 1) - 2) The Inverter power supply was shut off while writing data to the Inverter constants. 3) The control circuit is damaged. SOLUTION: 1) Try turning the power supply off and on again. 2) Initialize the constant settings (A1-03). 3) Replace the Inverter.
CPF04 Internal A/D Err	CPU Internal A/D Converter Error	CAUSE: 1) - 2) The control circuit is damaged. 3) • A short-circuit between +V, -V, and AC terminals occurred. • Overload in the control circuit terminal SOLUTION: 1) Try turning the power supply off and on again. 2) Replace the Inverter. 3) • Make sure that incorrect wiring has not been done. • Check the resistance and wiring for the frequency setting potentiometer, etc. (Check that the current for terminals +V and –V is 20 mA or less.)
CPF05 External A/D Err	CPU External A/D Converter Error	CAUSE: 1) - 2) The control circuit is damaged. 3) • A short-circuit between +V, -V, and AC terminals occurred. • Overload in the control circuit terminal. SOLUTION: 1) Try turning the power supply off and on again. 2) Replace the Inverter. 3) • Make sure that incorrect wiring has not been done. • Check the resistance and wiring for the frequency setting potentiometer, etc. (Check that the current for terminals +V and –V is 20 mA or less).
CPF06 Option error	Option Board Connection Error	CAUSE: 1) The option board is not connected properly. 2) The Inverter or option board is faulty. SOLUTION: 1) Turn off the power and insert the board again. 2) Replace the option board or the Inverter.
CPF07 RAM-Err	ASIC Internal RAM Fault	CAUSE: 1) - 2) The control circuit is damaged. SOLUTION: 1) Try turning the power supply off and on again. 2) Replace the Inverter.
CPF08 WAT-Err	Watchdog Timer Fault	CAUSE: 1) - 2) The control circuit is damaged. SOLUTION: 1) Try turning the power supply off and on again. 2) Replace the Inverter.
CPF09 CPU-Err	CPU-ASIC Mutual Diagnosis Fault	CAUSE: 1) - 2) The control circuit is damaged. SOLUTION: 1) Try turning the power supply off and on again. 2) Replace the Inverter.
CPF10 ASIC-Err	ASIC Version Fault	CAUSE: 1) The Inverter control circuit is faulty SOLUTION: 1) Replace the Inverter.
CPF20 Option A/D error	Communications Option Board A/D Converter Error	CAUSE: 1) The option board is not connected properly. 2) The option board's A/D converter is faulty. SOLUTION: 1) Turn off the power and insert the board again. 2) Replace the Communications Option Board.
CPF21 Option CPU down	Communications Option Board Self Diagnostic Error	CAUSE: 1) Communications Option Board fault. SOLUTION: 1) Replace the option board.
CPF22 Option Type Err	Communications Option Board Model Code Error	CAUSE: 1) Communications Option Board fault. SOLUTION: 1) Replace the option board.
CPF23 Option DPRAM Err	Communications Option Board DPRAM Error	CAUSE: 1) Communications Option Board fault. 2) The copy function of the Digital Operator was used during communications. 3) The option board is not connected properly. SOLUTION: 1) Replace the option board. 2) • Use the copy function off-line. • Use the copy function with an option board removed. 3) Turn off the power and insert the board again.
CRE CONTROL UNMATCH	Control method matched	CAUSE: 1) The control method of the Inverter being copied and the control method in the Digital Operator are different. SOLUTION: 1) Use the copy function for the same control method
CSE SUM CHECK ERROR	Checksum error	CAUSE: 1) The checksum in the Inverter constant area was compared with the checksum in the Digital Operator constant area and they were different. 2) The Inverter product code or software number is different. SOLUTION: 1) Retry the copy. 2) Use the copy function for the same product code and software number.
CYC (blinking) SI-T Cycle Err	SI-T Communications Cycle Setting Error Communications cycle of SI-T option board was out of range.	CAUSE: 1) Communications cycle of SI-T option board set in master controller was out of range. SOLUTION: 1) Check the communication cycle of SI-T option board set in master controller
CYE COPY ERROR	Verify error	CAUSE: 1) The constant written to the Inverter was compared with the constant in the Digital Operator and they were different. SOLUTION: 1) Retry the copy.
Data Invalid	Motor data error	CAUSE: 1) There is an error in the data input for autotuning. There is an error in the relationship between the motor output and the motor rated current. The is an error between the no-load current setting and the input motor rated current (when autotuning for only line-to-line resistance is performed for vector control). SOLUTION: 1) • Check the input data. • Check the capacity of the Inverter and motor. • Check the motor rated current and no-load current.
DEV (blinking) Speed Deviation	Excessive Speed Deviation The speed deviation has been greater than the setting in F1-10 for longer than the setting in F1-11.	CAUSE: 1) The load is too large. 2) The acceleration time and deceleration time are too short. 3) The load is locked. 4) The settings in F1-10 and F1-11 aren't appropriate. 5) Brake is applied to the motor SOLUTION: 1) Reduce the load. 2) Lengthen the acceleration time and deceleration time. 3) Check the mechanical system. 4) Check the settings in F1-10 and F1-11. 5) Check for open circuit when using brake (motor).
DEV Speed Deviation	Excessive Speed Deviation The speed deviation has been greater than the setting in F1-10 for longer than the setting in F1-11.	CAUSE: 1) The load is too heavy. 2) The acceleration time and deceleration time are too short. 3) The load is locked. 4) The settings in F1-10 and F1-11 aren't appropriate. 5) Brake is applied to the motor. SOLUTION: 1) Reduce the load. 2) Lengthen the acceleration time and deceleration time. 3) Check the mechanical system. 4) Check the settings in F1-10 and F1-11. 5) Check for open circuit when using brake (motor).
E-10 SI-F/G CPU down	SI-F/G Option Board CPU Failure SI-F/G Option Board operation failed.	CAUSE: 1) Digital Operator connection is faulty. 2) Inverter control circuit is faulty. SOLUTION: 1) Disconnect and then reconnect the Digital Operator. 2) Replace the Inverter.
E-15 SI-F/G Com Err	SI-F/G Communications Error Detected A communications error was detected when a Run Command or frequency reference was set from an option board and continuous operation was set for the E-15 operation selection.	CAUSE: 1) - SOLUTION: 1) Check the communications signals.
E5 (blinking) SI-T WDT Err	SI-T Watchdog Error Detected A Watchdog error was detected when the Run Command or a frequency reference was set from an option board and continuous operation was set for the E5 operation selection.	CAUSE: 1) Synchronization error between master controller and Inverter for control data. SOLUTION: 1) Check the communications timing such as communications cycle.
E5 SI-T WDT Err	SI-T Watchdog Error Consistency error of received control data	CAUSE: 1) Synchronization error between master controller and Inverter for control data. SOLUTION: 1) Check the communications timing such as communications cycle. Refer to MECHATROLINK COMMUNICATIONS INTERFACE CARD INSTRUCTIONS (TOBPC73060008) for details.
EF (blinking) External Fault	Forward/Reverse Run Commands Input Together Both the forward and Reverse Run Commands have been ON for more than 0.5 s.	CAUSE: 1) - SOLUTION: 1) Check the sequence of the forward and Reverse Run Commands. Since the rotational direction is unknown, the motor will be decelerated to a stop when this minor fault occurs.
EF0 (blinking) Opt External Flt	External Fault Detected for Communications Board Other Than SI-K2 Continuing operation was specified for EF0 (F6-03 = 3)and an external fault was input from the option board.	CAUSE: 1) - SOLUTION: 1) Remove the cause of the external fault.
EF0 Opt External Flt	External Fault Input from Communications Option Board	CAUSE: 1) - SOLUTION: 1) Check the Communications Option Board and communications signals.
EF10 (blinking) Ext Fault S10	External Fault (Input Terminal S10)	CAUSE: 1) An external fault was input from a multi-function input terminal (S3 to S7). SOLUTION: 1) • Reset external fault inputs to the multi-function inputs. • Remove the cause of the external fault.
EF10 Ext Fault S10	External Fault (Input Terminal 10)	CAUSE: 1) An “external fault” was input from a multi-function input terminal. SOLUTION: 1) • Reset external fault inputs to the multi-function inputs. • Remove the cause of the external fault.
EF11 (blinking) Ext Fault S11	External Fault (Input Terminal S11)	CAUSE: 1) An external fault was input from a multi-function input terminal (S3 to S7). SOLUTION: 1) • Reset external fault inputs to the multi-function inputs. • Remove the cause of the external fault.
EF11 Ext Fault S11	External Fault (Input Terminal 11)	CAUSE: 1) An “external fault” was input from a multi-function input terminal. SOLUTION: 1) • Reset external fault inputs to the multi-function inputs. • Remove the cause of the external fault.
EF12 (blinking) Ext Fault S12	External Fault (Input Terminal S12)	CAUSE: 1) An external fault was input from a multi-function input terminal (S3 to S7). SOLUTION: 1) • Reset external fault inputs to the multi-function inputs. • Remove the cause of the external fault.
EF12 Ext Fault S12	External Fault (Input Terminal 12)	CAUSE: 1) An “external fault” was input from a multi-function input terminal. SOLUTION: 1) • Reset external fault inputs to the multi-function inputs. • Remove the cause of the external fault.
EF3 (blinking) Ext Fault S3	External Fault (Input Terminal S3)	CAUSE: 1) An external fault was input from a multi-function input terminal (S3 to S7). SOLUTION: 1) • Reset external fault inputs to the multi-function inputs. • Remove the cause of the external fault.
EF3 Ext Fault S3	External Fault (Input Terminal 3)	CAUSE: 1) An “external fault” was input from a multi-function input terminal. SOLUTION: 1) • Reset external fault inputs to the multi-function inputs. • Remove the cause of the external fault.
EF4 (blinking) Ext Fault S4	External Fault (Input Terminal S4)	CAUSE: 1) An external fault was input from a multi-function input terminal (S3 to S7). SOLUTION: 1) • Reset external fault inputs to the multi-function inputs. • Remove the cause of the external fault.
EF4 Ext Fault S4	External Fault (Input Terminal 4)	CAUSE: 1) An “external fault” was input from a multi-function input terminal. SOLUTION: 1) • Reset external fault inputs to the multi-function inputs. • Remove the cause of the external fault.
EF5 (blinking) Ext Fault S5	External Fault (Input Terminal S5)	CAUSE: 1) An external fault was input from a multi-function input terminal (S3 to S7). SOLUTION: 1) • Reset external fault inputs to the multi-function inputs. • Remove the cause of the external fault.
EF5 Ext Fault S5	External Fault (Input Terminal 5)	CAUSE: 1) An “external fault” was input from a multi-function input terminal. SOLUTION: 1) • Reset external fault inputs to the multi-function inputs. • Remove the cause of the external fault.
EF6 (blinking) Ext Fault S6	External Fault (Input Terminal S6)	CAUSE: 1) An external fault was input from a multi-function input terminal (S3 to S7). SOLUTION: 1) • Reset external fault inputs to the multi-function inputs. • Remove the cause of the external fault.
EF6 (blinking) Ext Fault S7	External Fault (Input Terminal S7)	CAUSE: 1) An external fault was input from a multi-function input terminal (S3 to S7). SOLUTION: 1) • Reset external fault inputs to the multi-function inputs. • Remove the cause of the external fault.
EF6 Ext Fault S6	External Fault (Input Terminal 6)	CAUSE: 1) An “external fault” was input from a multi-function input terminal. SOLUTION: 1) • Reset external fault inputs to the multi-function inputs. • Remove the cause of the external fault.
EF7 Ext Fault S7	External Fault (Input Terminal 7)	CAUSE: 1) An “external fault” was input from a multi-function input terminal. SOLUTION: 1) • Reset external fault inputs to the multi-function inputs. • Remove the cause of the external fault.
EF8 (blinking) Ext Fault S8	External Fault (Input Terminal S8)	CAUSE: 1) An external fault was input from a multi-function input terminal (S3 to S7). SOLUTION: 1) • Reset external fault inputs to the multi-function inputs. • Remove the cause of the external fault.
EF8 Ext Fault S8	External Fault (Input Terminal 8)	CAUSE: 1) An “external fault” was input from a multi-function input terminal. SOLUTION: 1) • Reset external fault inputs to the multi-function inputs. • Remove the cause of the external fault.
EF9 (blinking) Ext Fault S9	External Fault (Input Terminal S9)	CAUSE: 1) An external fault was input from a multi-function input terminal (S3 to S7). SOLUTION: 1) • Reset external fault inputs to the multi-function inputs. • Remove the cause of the external fault.
EF9 Ext Fault S9	External Fault (Input Terminal 9)	CAUSE: 1) An “external fault” was input from a multi-function input terminal. SOLUTION: 1) • Reset external fault inputs to the multi-function inputs. • Remove the cause of the external fault.
ERR EEPROM R/W Err	EEPROM Write Error
FAN (blinking) Cooling Fan Fault	Inverter’s Cooling Fan Fault An Inverter’s cooling fan fault was detected. This fault is detected when L8-32 is set to 0.	CAUSE: 1) The Inverter’s cooling fan has stopped. SOLUTION: 1) Replace the cooling fan. (Contact our sales representative.)
FBL (blinking) Feedback Loss	PID Feedback Reference Lost A PID feedback reference loss was detected (b5-12 = 2) and the PID feedback input was less than b5-13 (PID feedback loss detection level) for longer than the time set in b5-14 (PID feedback loss detection time).	CAUSE: 1) The settings in b5-13 and b5-14 aren’t appropriate. 2) The wiring of the PID feedback circuit is incorrect. SOLUTION: 1) Check the settings in b5-13 and b5-14. 2) Fix the wiring.
FBL Feedback Loss	PID Feedback Reference Lost A PID feedback reference loss was detected (b5-12 = 2) and the PID feedback input was less than b5-13 (PID feedback loss detection level) for longer than the time set in b5-14 (PID feedback loss detection time)	CAUSE: 1) The settings in b5-13 and b5-14 aren’t appropriate. 2) The wiring of the PID feedback circuit is incorrect. SOLUTION: 1) Check the settings in b5-13 and b5-14. 2) Fix the wiring.
GF Ground Fault	Ground Fault* The ground fault current at the Inverter output exceeded approximately 50% of the Inverter rated output current.	CAUSE: 1) A ground fault occurred at the Inverter output. (A ground fault can be caused by motor burn damage, worn insulation, or a damaged cable.) 2) • A short-circuit between +V, -V, and AC terminals occurred. • Overload in the control circuit terminal. SOLUTION: 1) Reset the fault after correcting its cause. Note: Before turning the power ON again, make sure that no short-circuit or ground fault occurs at the Inverter output. 2) • Make sure that incorrect wiring has not been done. • Check the resistance and wiring for the frequency setting potentiometer, etc. (Check that the current for terminals +V and –V is 20 mA or less.)
HCA (blinking) High Current Alarm	Current Alarm The output current has exceeded the overcurrent alarm level (over 150% of the rated current).	CAUSE: 1) The load is too heavy or the accel/decel time is too short. 2) Either a specialized motor or an excessively large motor is being used. 3) The current has risen too high while performing speed search either during a momentary loss in power or during a fault restart. SOLUTION: 1) Increase the acceleration/deceleration time. 2) Verify the setting for the Inverter capacity. 3) Momentary losses in power or fault restarts may occasionally trigger an overcurrent alarm, and are not necessarily indicators of an overcurrent problem.
I-det. Circuit	Current detection error	CAUSE: 1) - The current flow exceeded the motor rated current. - The detected current sign was the opposite of what it should be - There is a phase fault for U, V, or W. SOLUTION: 1) Check the current detection circuit, motor wiring, current detector, and installation methods
IFE READ DATA ERROR	Illegal read data	CAUSE: 1) - The read data length does not agree. - The write data is incorrect. SOLUTION: 1) - Repeat the read. - Check the Digital Operator cable. - Replace the Digital Operator.
Leak Inductance	Leakage inductance error	CAUSE: 1) Autotuning was not completed in the specified time. SOLUTION: 1) Check motor wiring.
LF Output Pha Loss	Output Open-phase An open-phase occurred at the Inverter output. This fault is detected when L8-07 is set to 1 or 2	CAUSE: 1) • There is a broken wire in the output cable. • There is a broken wire in the motor winding. • The output terminals are loose. 2) The motor being used has a capacity less than 5% of the rated output current. SOLUTION: 1) Reset the fault after correcting its cause. 2) Check the motor and Inverter capacity.
LT-C (blinking)C Maintenance	Electrolytic Capacitor Maintenance Timer Monitor U1-61 has reached 100%.	CAUSE: 1) The electrolytic capacitors have reached their estimated maintenance time period. SOLUTION: 1) Reset constant o2-18 to “0%” after replacing *2 the electrolytic capacitors
LT-F (blinking) Fan Maintenance	Cooling Fan Maintenance Timer Monitor U1-63 has reached 100%	CAUSE: 1) The cooling fan has reached its estimated maintenance time period SOLUTION: 1) Replace the cooling fan *2 and set constant o2-10 to “0H”.
Minor Fault	Alarm	CAUSE: 1) A minor fault occurred during autotuning (xxx). SOLUTION: 1) • Check the input data. • Check wiring and the machine. • Check the load.
Motor Speed	Motor speed error (detected only for rotational autotuning)	CAUSE: 1) The torque reference was too high (100%) during acceleration (for open loop vector control or flux vector control) SOLUTION: 1) • If the motor is connected to the machine, disconnect it. • Increase C1-01 (Acceleration Time 1). • Check the input data (particularly the number of PG pulses and the number of motor poles).
No display	There was a drop in control power voltage.	CAUSE: 1) • A short-circuit between +V, -V, and AC terminals occurred. • Overload in the control circuit terminal. 2) The short-circuit bar between +1 and +2 terminals in the main circuit has been removed. 3) P terminal and N terminal of the Braking Unit are connected in reverse. 4) Control power circuit failure. 5) Malfunction occurred in the control power circuit. 6) The Digital Operator is not connected properly. SOLUTION: 1) • Make sure that incorrect wiring has not been done. • Check the resistance and wiring for the frequency setting potentiometer, etc. (Check that the current for terminals +V and –V is 20 mA or less.) 2) Attach the short-circuit bar. 3) • Check the wiring for the Braking Unit, including cables connected to the Braking Unit and relay terminals. • Replace the Inverter. 4) Charge indicator is lit: • Replace the Digital Operator. • Replace the board or the Inverter. Charge indicator is not lit: • Check the input power supply voltage. • Replace the Inverter. 5) Turn OFF the power, wait for 5 minutes, and turn ON the power again. 6) Turn OFF the power, disconnect the Digital Operator, and then reconnect it again.
No-Load Current	No-load current error	CAUSE: 1) Autotuning was not completed in the specified time. The results of autotuning has exceeded the setting range for a user constant. SOLUTION: 1) • Check the input data. • Check motor wiring. • If the motor is connected to the machine, disconnect it.
OC Over Current	Overcurrent The Inverter output current exceeded the overcurrent detection level. (200% of rated current)	CAUSE: 1) • A short-circuit or ground fault occurred at the Inverter output. (A short or ground fault can be caused by motor burn damage, worn insulation, or a damaged cable.) • The load is too large or the acceleration/deceleration time is too short. • A special-purpose motor or motor with a capacity too large for the Inverter is being used. • A magnetic contactor was switched at the Inverter output. 2) There is a break in the PG wiring. 3) The PG is wired incorrectly. 4) Power isn't being supplied to the PG. 5) • A short-circuit between +V, -V, and AC terminals occurred. • Overload in the control circuit terminal. SOLUTION: 1) Reset the fault after correcting its cause. Note: Before turning the power ON again, make sure that no short-circuit or ground fault occurs at the Inverter output. 2) Fix the broken/disconnected wiring. 3) Fix the wiring. 4) Supply power to the PG properly. 5) • Make sure that incorrect wiring has not been done. • Check the resistance and wiring for the frequency setting potentiometer, etc. (Check that the current for terminals +V and –V is 20 mA or less.)
OH (blinking) Heatsink Overtemp	Cooling Fin Overheating The temperature of the Inverter's cooling fins exceeded the setting in L8-02.	CAUSE: 1) The ambient temperature is too high. 2) There is a heat source nearby. 3) The Inverter cooling fan has stopped. 4) • A short-circuit between +V, -V, and AC terminals occurred. • Overload in the control circuit terminal. SOLUTION: 1) • Make sure that incorrect wiring has not been done. • Check the resistance and wiring for the frequency setting potentiometer, etc. (Check that the current for terminals +V and –V is 20 mA or less.)
OH (OH1) Heatsnk Overtemp (Heatsnk MAX Temp)	Inverter's Cooling Fan Fault (200 V Class: 7.5 kW or more, 400 V Class: 5.5 kW or more) This fault is detected when L8-32 is set to 1.	CAUSE: 1) • The Inverter's cooling fan has stopped. • The heatsink is clogged. SOLUTION: • Replace the cooling fan. (Contact our sales representative.) • Clean the heatsink.
OH (OH1) Heatsnk Overtemp (Heatsnk MAX Temp)	Cooling Fin Overheating The temperature of the Inverter's cooling fins exceeded the setting in L8-02 or the overheat protection level. OH: The temperature exceeded the setting in L8-02 (Stopping method can be changed by L8-03.). OH1: The temperature exceeded 100C (Stopping method: Coast to stop).	CAUSE: 1) The ambient temperature is too high. 2) There is a heat source nearby. 3) The Inverter's cooling fan has stopped. 4) • A short-circuit between +V, -V, and AC terminals occurred. • Overload in the control circuit terminal. SOLUTION: 1) Install a cooling unit. 2) Remove the heat source. 3) Replace the cooling fan. (Contact our sales representative.) 4) • Make sure that incorrect wiring has not been done. • Check the resistance and wiring for the frequency setting potentiometer, etc. (Check that the current for terminals +V and –V is 20 mA or less.)
OH2 (blinking) Over Heat 2	Inverter Overheating Pre-alarm An OH2 alarm signal (Inverter overheating alarm signal) was input from a multi-function input terminal (S3 to S7).	CAUSE: 1) - SOLUTION: 1) Clear the multi-function input terminal's overheating alarm input.
OH3 (blinking) Motor Overheat 1	Motor Overheating E was set for H3-09 and the motor temperature thermistor input exceeded the alarm detection level.	CAUSE: 1) The motor has overheated. SOLUTION: 1) - Check the size of the load and the length of the acceleration, deceleration, and cycle times. - Check the V/f characteristics. - Check the motor temperature input on terminals A1 and A2.
OH3 Motor Overheat 1	Motor Overheating Alarm The Inverter will stop or will continue to operate according to the setting of L1-03.	CAUSE: 1) The motor has overheated SOLUTION: 1) - Check the size of the load and the length of the acceleration, deceleration, and cycle times. - Check the V/f characteristics. - Check the Motor Rated Current (E2-01).
OH4 Motor Overheat 2	Motor Overheating Fault The Inverter will stop according to the setting of L1-04.	CAUSE: 1) The motor has overheated SOLUTION: 1) - Check the size of the load and the length of the acceleration, deceleration, and cycle times. - Check the V/f characteristics. - Check the Motor Rated Current (E2-01).
OL1 Motor Overloaded	Motor Overload The motor overload protection function has operated based on the internal electronic thermal value.	CAUSE: 1) The load is too heavy. The acceleration time, deceleration time, and cycle time are too short. 2) The constant setting for speed search is incorrect. (Motor overload occurred due to motor hunting and vibration.) 3) • Motor overload occurred when running at low speed. (If a general-purpose motor is used, motor overload can occur when running at low speed even if running within the rated current.) • Motor protection selection (L1-01) is set to general-purpose motor protection (1) when an Inverter duty motor is used. 4) The directions of the motor and PG are different. (Only in flux vector control) 5) The V/f characteristics voltage is too high. 6) The Motor Rated Current (E2-01) is incorrect. 7) • A short-circuit between +V, -V, and AC terminals occurred. • Overload in the control circuit terminal. 8) The input voltage is lower than the Inverter’s output voltage reference (U1-06) and hunting or fluctuation is occurring in the output current. SOLUTION: 1) Check the size of the load and the length of the acceleration, deceleration, and cycle times. 2) • Use the speed search function. • Adjust the settings of the Speed search operating current (b3-02) and Speed search deceleration time (b3-03). • Use the estimated speed search function. (Autotuning for motor line-to-line resistance is required.) 3) • Check the size of the load. • Check the setting of L1-01. • Increase the frame size of the Inverter 4) • Correct the PG wiring. • Correct the motor wiring. • Change the setting of PG rotation (F1-05). 5) Check the V/f characteristics. 6) Check the Motor Rated Current (E2-01). 7) • Make sure that incorrect wiring has not been done. • Check the resistance and wiring for the frequency setting potentiometer, etc. (Check that the current for terminals +V and –V is 20 mA or less.) 8) • Decrease the setting of E1-05 (Max. Voltage). (Typically, decrease in intervals by 10%.) • Decrease the setting of C4-01 (Torque Compensation Gain) (0.0 to 0.5).
OL2 Inv Overloaded	Inverter Overload The Inverter overload protection function has operated based on the internal electronic thermal value.	CAUSE: 1) The load is too heavy. The acceleration time, deceleration time and cycle time are too short. 2) The constant setting for speed search is incorrect. (Motor overload occurred due to motor hunting and vibration.) 3) The directions of the motor and PG are different. (Only in flux vector control) 4) The V/f characteristics voltage is too high. 5) The Inverter capacity is too low. 6) • A short-circuit between +V, -V, and AC terminals occurred. • Overload in the control circuit terminal. 7) Inverter overload occurred when running at a low speed of 6 Hz or less. SOLUTION: 1) Check the size of the load and the length of the acceleration, deceleration, and cycle times. 2) • Use the speed search function. • Adjust the settings of the Speed search operating current (b3-02) and Speed search deceleration time (b3-03). • Use the estimated speed search function. (Autotuning for motor line-to-line resistance is required.) 3) • Correct the PG wiring. • Correct the motor wiring. • Change the setting of PG rotation (F1-05). 4) Check the V/f characteristics. 5) Replace the Inverter with one that has a larger capacity. 6) • Make sure that incorrect wiring has not been done. • Check the resistance and wiring for the frequency setting potentiometer, etc. (Check that the current for terminals +V and –V is 20 mA or less.) 7) • Reduce the load. • Increase the frame size of the Inverter. • Lower the carrier frequency.
OL3 (blinking) Overtorque Det 1	Overtorque 1 There has been a current greater than the setting in L6-02 for longer than the setting in L6-03.	CAUSE: 1) - SOLUTION: 1) • Make sure that the settings in L6-02 and L6-03 are appropriate. • Check the mechanical system and correct the cause of the overtorque.
OL3 Overtorque Det 1	Overtorque Detected 1 There has been a current greater than the setting in L6-02 for longer than the setting in L6-03.	CAUSE: 1) - SOLUTION: 1) • Make sure that the settings in L6-02 and L6-03 are appropriate. • Check the mechanical system and correct the cause of the overtorque.
OL4 (blinking) Overtorque Det 2	Overtorque 2 There has been a current greater than the setting in L6-05 for longer than the setting in L6-06.	CAUSE: 1) - SOLUTION: 1) • Make sure that the current setting in L6-05 and time setting in L6-06 are appropriate. • Check the mechanical system and correct the cause of the overtorque.
OL4 Overtorque Det 2	Overtorque Detected 2 There has been a current greater than the setting in L6-05 for longer than the setting in L6-06.	CAUSE: 1) - SOLUTION: 1) • Make sure that the current setting in L6-05 and time setting in L6-06 are appropriate. • Check the mechanical system and correct the cause of the overtorque
OL7 HSB-OL	High-slip Braking OL The output frequency did not change for longer than the time set in N3-04.	CAUSE: 1) The inertia returned to the load is too large. SOLUTION: 1) • Make sure the load is an inertial load. • Set the system so that the deceleration time that does not produce overvoltages is 120 s or less.
OPE01 kVA Selection	Incorrect Inverter Capacity Setting
OPE02 Limit	Constant Setting Range Error
OPE03 Terminal	Multi-function Input Selection Error
OPE05 Sequence Select	Option Board Selection Error
OPE06 PG Opt Missing	Control Method Selection Error
OPE07 Analog Selection	Multi-function Analog Input Selection Error
OPE08	Constant Selection Error
OPE09	PID Control Selection Error
OPE10 V/f Ptrn Setting	V/f Data Setting Error
OPE11 Carr Freq/ On-Delay	Constant Setting Error
OPERATOR ERR RAM CHECK ERR	Operator Error (Internal RAM Fault) During operation, an error was detected when the display pattern for the character code 80 to 8F recorded in the internal RAM was checked.	CAUSE: 1) - SOLUTION: 1) Replace the Operator.
OPERATOR ERR DATA SEND ERR	Operator Error (Transmission Circuit Fault) During operation, send processing did not complete within 500 ms continuously at least 10 times.	CAUSE: 1) - SOLUTION: 1) Replace the Operator.
OPERATOR ERR RAM CHECK ERR	Operator Error (Internal RAM Fault) At power ON, an error was detected from the results of the internal RAM Write/Read check.	CAUSE: 1) - SOLUTION: 1) Replace the Operator.
OPERATOR ERR ROM CHECK ERR	Operator Error (CPU Internal ROM Fault) At power ON and during operation, an error was detected when the internal ROM was checked.	CAUSE: 1) - SOLUTION: 1) Replace the Operator.
OPERATOR ERR WATCHDOG ERR	Operator Error (Watchdog Error) During operation, an error was detected in the program execution.	CAUSE: 1) - SOLUTION: 1) Replace the Operator.
OPR Oper Disconnect	Digital Operator Connection Fault The connection to the Digital Operator was broken during operation for a Run Command from the Digital Operator	CAUSE: 1) - SOLUTION: 1) Check the connection to the Digital Operator
OS (blinking) Overspeed Det	Overspeed The speed has been greater than the setting in F1-08 for longer than the setting in F1-09.	CAUSE: 1) Overshooting/undershooting are occurring. 2) The reference speed is too high. 3) The settings in F1-08 and F1-09 aren't appropriate. SOLUTION: 1) Adjust the gain again. 2) Check the reference circuit and reference gain. 3) Check the settings in F1-08 and F1-09.
OS Overspeed Det	Overspeed The speed has been greater than the setting in F1-08 for longer than the setting in F1-09.	CAUSE: 1) Overshooting/Undershooting are occurring. 2) The reference speed is too high. 3) The settings in F1-08 and F1-09 aren't appropriate. SOLUTION: 1) Adjust the gain again. 2) Check the reference circuit and reference gain. 3) Check the settings in F1-08 and F1-09.
OV DC Bus Overvolt	Main Circuit Overvoltage The main circuit DC voltage exceeded the overvoltage detection level. 200-240 V Class: Approx. 410 V 380-480 V Class: Approx. 820 V (E1-01 >= 400 V) Approx. 720 V (E1-01 < 400 V)	CAUSE: 1) The deceleration time is too short and the regenerative energy from the motor is too large. 2) Motor ground fault (Ground fault current flowed to the capacitor in the control circuit of the Inverter through the power supply.) 3) Incorrect constant setting for speed search (The speed search can be performed during momentary power loss recovery and auto restart after a fault.) 4) Improper PG cable connection (PG noise, PG disconnection) 5) The regenerative energy when an overshoot occurs after acceleration is completed is too large. 6) The power supply voltage is too high SOLUTION: 1) Increase the deceleration time or connect a braking resistor (or Braking Resistor Unit). Alternatively, enable (set to 1) the stall prevention selection during deceleration (L3-04). 2) Check the output cable, relay terminal, or motor terminal box and correct the cause of ground fault. 3) • Use the speed search function. • Adjust the settings of the Speed search operating current (b3-02) and Speedsearch deceleration time (b3-03). • Use the estimated speed search function. (Autotuning for motor line-to-line resistance is required.) 4) Check to see if the PG cable is connected properly. 5) In vector control, enable (set to 1) the overvoltage inhibit selection (L3-11). 6) Decrease the voltage so it’s within specifications.
OV (blinking) DC Bus Overvolt	Main Circuit Overvoltage The main circuit DC voltage exceeded the overvoltage detection level. 200-240 V Class: Approx. 410 V 380-480 V Class: Approx. 820 V	CAUSE: 1) The power supply voltage is too high. SOLUTION: 1) Decrease the voltage so it's within specifications.
PF Input Pha Loss	Main Circuit Voltage Fault The main circuit DC voltage oscillates unusually (not when regenerating). This fault is detected if a load is greater than approximately 80% of the maximum motor capacity. This fault is detected when L8-05 is set to 1.	CAUSE: 1) • An open-phase occurred in the input power supply. • A momentary power loss occurred. • The wiring terminals for the input power supply are loose. • The voltage fluctuations in the input power supply are too large. • The voltage balance between phases is bad. SOLUTION: 1) Reset the fault after correcting its cause.
PG Direction	Motor Direction Error	CAUSE: 1) There is a faulty connection between the Inverter and PC (A or B phase) or the Inverter and Motor (U, V, or W). SOLUTION: 1) • Check the PG wiring. • Check the motor wiring. • Check the PG rotation direction and F1-05 (PG rotation).
PG Open	PG Disconnection Detected	CAUSE: 1) PG pulses were input when the Inverter was outputting a frequency. SOLUTION: 1) Fix the broken/disconnected wiring.
PGO (blinking) PG Open	The PG is Disconnected The Inverter is outputting a frequency, but PG pulses aren't being input.	CAUSE: 1) There is a break in the PG wiring. 2) The PG is wired incorrectly. 3) Power isn't being supplied to the PG. 4) Brake is applied to the motor. SOLUTION: 1) Fix the broken/disconnected wiring. 2) Fix the wiring. 3) Supply power to the PG properly. 4) Check for open circuit when using brake (motor).
PGO PG Open	PG Disconnection Detected PG pulses were input when the Inverter was outputting a frequency.	CAUSE: 1) There is a break in the PG wiring. 2) The PG is wired incorrectly. 3) Power isn't being supplied to the PG. 4) Brake is applied to the motor. SOLUTION: 1) Fix the broken/disconnected wiring. 2) Fix the wiring. 3) Supply power to the PG properly. 4) Check for open circuit when using brake (motor).
PRE READ IMPOSSIBLE	Digital Operator write-protected	CAUSE: 1) o3-01 was set to 1 to write a constant when the Digital Operator was write protected (o3-02 = 0). SOLUTION: 1) Set o3-02 to 1 to enable writing constants with the Digital Operator.
PUF Main IGBT Fuse Blown	Fuse Blown The fuse in the main circuit is blown.	CAUSE: 1) The output transistor has failed because of a short-circuit or ground fault at the Inverter output. Check whether there is a short-circuit between the following terminals. A short-circuit will damage the output transistor: B1 (+3) <--> U, V, W (-) <--> U, V, W SOLUTION: 1) Replace the Inverter after correcting the cause.
Rated FLA Alm	Rated current setting alarm	CAUSE: 1) The rated current is set high. SOLUTION: 1) Check the input data (particularly the motor output current and motor rated current).
Rated Slip	Rated slip error	CAUSE: 1) Autotuning was not completed in the specified time. The results of autotuning has exceeded the setting range for a user constant. SOLUTION: 1) • Check the input data. • Check motor wiring. • If the motor is connected to the machine, disconnect it.
RDE DATA ERROR	Illegal write status	CAUSE: 1) An attempted write of a constant to EEPROM on the Digital Writer failed. SOLUTION: 1) - A low Inverter voltage has been detected. - Repeat the read. - Replace the Digital Operator.
Resistance	Line-to-line resistance error	CAUSE: 1) Autotuning was not completed in the specified time. The results of autotuning has exceeded the setting range for a user constant. SOLUTION: 1) • Check the input data. • Check motor wiring. • If the motor is connected to the machine, disconnect it.
RH DynBrk Resistor	Installed Braking Resistor Overheating Braking resistor protection function set in L8-01 has operated	CAUSE: 1) The deceleration time is too short and the regenerative energy from the motor is too large SOLUTION: 1) • Reduce the load, increase the deceleration time, or reduce the motor speed. • Change to a Braking Resistor Unit.
RR DynBrk Transistr	Internal Braking Transistor Fault The braking transistor is not operating properly.	CAUSE: 1) • The braking transistor is damaged. • The Inverter’s control circuits are faulty. SOLUTION: 1) • Disconnect the Braking Resistor wiring, turn ON the power supply again, and operate the motor. If the power supply is turned ON while the Braking Resistor wiring is connected, the Braking Resistor or Inverter may overheat and be damaged. • Replace the Inverter if the fault continues to occur.
RUNC (blinking) Ext Run Active	Reset during Run Command Input Error The reset signal was input during Run Command input from an external terminal or other source.	CAUSE: 1) - SOLUTION: 1) Check that a Run Command is not being input from an external terminal or other source
Saturation	Motor core saturation error (detected only for rotational autotuning)	CAUSE: 1) The results of autotuning has exceeded the setting range for a user constant so a temporary setting was made for the motor core saturation coefficient. SOLUTION: 1) • Check the input data. • Check motor wiring. • If the motor is connected to the machine, disconnect it
SER Search Retrials Fault	Exceeded Allowable Number of Speed Search Retrials The speed search has been retried more than the number of times set in b3-19 (Number of speed search retrials).	CAUSE: 1) The settings in b3-17 and b3-18 aren’t appropriate. SOLUTION: 1) Make sure that the settings in b3-17 and b3-18 are appropriate.
STOP key	STOP key input	CAUSE: 1) The STOP Key was pressed to cancel autotuning. SOLUTION: 1) • Check the input data. • Check wiring and the machine. • Check the load.
SVE Zero Servo Fault	Zero-servo Fault The rotation position moved during zero-servo operation.	CAUSE: 1) The torque limit is too small. 2) The load torque is too large. 3) - SOLUTION: 1) Increase the limit. 2) Reduce the load torque. 3) Check for signal noise.
UL3 (blinking) Undertorq Det 1	Undertorque 1 There has been a current less than the setting in L6-02 for longer than the setting in L6-03	CAUSE: 1) - SOLUTION: 1) • Make sure that the settings in L6-02 and L6-03 are appropriate. • Check the mechanical system and correct the cause of the overtorque
UL3 Undertorq Det 1	Undertorque Detected 1 There has been a current less than the setting in L6-02 for longer than the setting in L6-03.	CAUSE: 1) - SOLUTION: 1) • Make sure that the settings in L6-02 and L6-03 are appropriate. • Check the mechanical system and correct the cause of the overtorque.
UL4 (blinking) Undertorq Det 2	Undertorque 2 There has been a current less than the setting in L6-05 for longer than the setting in L6-06.	CAUSE: 1) - SOLUTION: 1) • Make sure that the current setting in L6-05 and time setting in L6-06 are appropriate. • Check the mechanical system and correct the cause of the overtorque.
UL4 Undertorq Det 2	Undertorque Detected 2 There has been a current less than the setting in L6-05 for longer than the setting in L6-06.	CAUSE: 1) - SOLUTION: 1) • Make sure that the current setting in L6-05 and time setting in L6-06 are appropriate. • Check the mechanical system and correct the cause of the overtorque.
UV (blinking) DC Bus Undervolt	Main Circuit Undervoltage The following conditions occurred when there was no Run signal. • The main circuit DC voltage was below the Undervoltage Detection Level Setting (L2-05). • The surge current limiting magnetic contactor opened. • The control power supply voltage when below the CUV level.	CAUSE: 1) See causes for UV1, UV2, and UV3 faults in the previous table. SOLUTION: 1) See corrective actions for UV1, UV2, and UV3 faults in the previous table.
UV1 DC Bus Undervolt	Main Circuit Undervoltage The main circuit DC voltage is below the Undervoltage Detection Level (L2-05). 200-240 V Class: Approx. 190 V 380-480 V Class: Approx. 380 V Main Circuit Magnetic Connector Operation Failure The magnetic connector stopped responding during Inverter operation. Applicable Inverter Capacities 200-240 V Class: 30 to 110 kW 380-480 V Class: 55 to 300 kW	CAUSE: 1) • An open-phase occurred with the input power supply. • A momentary power loss occurred. • The wiring terminals for the input power supply are loose. • The voltage fluctuations in the input power supply are too large. • A fault occurred in the surge prevention circuit. • The magnetic contactor in the control circuit was released (Contact failure in the auxiliary contact). • The contact of the magnetic contactor in the control circuit was corroded due to environmental dust or gas. • A fuse on the Change Power Tap Circuit Board has blown for a 400 V Class Inverter of 55 kW or higher SOLUTION: 1) • Reset the fault after correcting its cause. • Improve the power supply environment. (Check to see if the correct power tap is selected.) • Improve the operating environment. • Replace the Inverter
UV2 CTL PS Undervolt	Control Power Fault The control power supply voltage dropped.	CAUSE: 1) • The wiring of the control power circuit is incorrect. • A Backup Capacitor Unit for Momentary Power Loss is not attached to a 200 V/400 V Class Inverter of 7.5 kW or less and the value of the Momentary power loss ridethru time (L2-02) factory setting has been changed to the larger value. SOLUTION: 1) • Try turning the power supply off and on. • Replace the Inverter if the fault continues to occur. • Attach a Backup Capacitor Unit for Momentary Power Loss.
UV3 MC Answer back	Inrush Prevention Circuit Fault A fault occurred in the surge prevention circuit. The magnetic contactor did not respond for 10 s even though the magnetic contactor ON signal has been output.	CAUSE: 1) • The magnetic contactor in the main circuit failed. • The magnetic contactor excitation coil is burned out. SOLUTION: 1) • Try turning the power supply off and on. • Replace the Inverter if the fault continues to occur.
V/f Over Setting	V/f settings excessive	CAUSE: 1) The torque reference exceeded 20% and the no-load torque exceeded 70% during autotuning. SOLUTION: 1) • Check and correct the settings. • Disconnect the load from the motor.
VAE INV. KVA UNMATCH	Inverter capacity matched	CAUSE: 1) The capacity of the Inverter being copied and the capacity in the Digital Operator are different SOLUTION: 1) Use the copy function for the same Inverter capacity.
VCF Vcn Failure	Main Circuit Capacitor Neutral Point Potential Error An excessive imbalance occurred in the main circuit capacitor’s neutral point potential.	CAUSE: 1) A loss in capacity due to aging of the main circuit capacitor. 2) The Inverter parts are faulty. 3) An open phase was detected for an output. 4) Carrier frequency set value (C6-03, C6-04) is unsuitable. 5) In V/f or open-loop vector control, the motor consecutively loses synchronism (the output current exceeds 200% of the Inverter rated current) SOLUTION: 1) Replace the main circuit capacitor. (Consult your YASKAWA representative.) 2) Replace the Inverter. 3) Refer to LF (output open phase) in this table. 4) Check the set values for C6-03 and C6-04. The maximum output frequency that can be set for 400 V Class Inverters is restricted by the carrier frequency setting. Refer to page 6-46. 5) • Reduce the load. • Increase the acceleration time. • Check the settings for V/f control. • Use larger capacity Inverter.
VYE VERIFY ERROR	Verify error	CAUSE: 1) The Digital Operator and Inverter settings do not agree. SOLUTION: 1) Retry the copy and verify again.