Protective and Diagnostic Functions. Omron Varispeed L7
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6
-2
Protective and Diagnostic Functions
This section describes the fault and alarm functions of the Inverter. These functions include fault detection, alarm detection, operator programming error detection and auto-tuning error detection.
Fault Detection
When the Inverter detects a fault, the fault contact output operates and the Inverter output is switched OFF causing the motor to coast to stop. (The stopping method can be selected for some faults.) A fault code is displayed on the Digital Operator/Monitor.
The faults can be categorized in two groups:
•
•
Faults that can be rested using an input or the reset key at the Digital Operator without cycling the power
(resetable faults)
Faults that require to cycle the power (non-resetable faults)
When a fault has occurred refer to the following identify the fault and to correct the causes.
To reset a fault it is necessary to remove the fault and the RUN signal. Only then a Reset signal is accepted.
See the following tables for the faults and corrective actions.
Table 6.20 Resetable Faults
Display Meaning Probable Causes Corrective Actions
Remove the motor and run the
Inverter without the motor.
GF
Ground Fault
Ground Fault
The ground current at the Inverter output exceeded 50% of the Inverter rated output current and L8-09=1
(Enabled).
One Inverter output was shorted to ground and/or a DCCT is defective.
Check the motor for a phase to ground short.
Check the output current with a clampmeter to verify the DCCT reading.
OC
Over Current
PUF
DC Bus Fuse Open
Overcurrent
The Inverter’s output current exceeded the overcurrent detection level.
DC Bus Fuse
The fuse in the main circuit is open.
Warning:
Never run the Inverter after replacing the DC bus fuse without checking for shorted components.
Shorted Inverter output phase-tophase, shorted motor, locked rotor, load too heavy, accel/decel time too short, contactor on the Inverter output has opened or closed, a special motor or a motor with a rated current larger than the Inverter’s output current is used.
Remove the motor and run the
Inverter without the motor.
Check the motor for a phase-tophase short.
Verify the accel/decel times
(C1-).
Check the Inverter for a phase-tophase short at the output.
Shorted output transistor(s) or terminals.
Check the motor and the motor cables for short circuits or insulation failures (phase-to-phase).
Replace the inverter after correcting the fault.
OV
DC Bus Overvolt
DC Bus Overvoltage
The DC bus voltage has exceeded the overvoltage detection level.
Default detection levels are:
200 V class: 410 VDC
400 V class: 820 VDC
The deceleration time is set too short and the regenerative energy from the motor is too large.
The power supply voltage is too high.
Increase the deceleration time
(C1-02/04/06/08) or connect a braking option.
Check the power supply and decrease the voltage to meet the inverter’s specifications.
Protective and Diagnostic Functions
Display
UV1
DC Bus Undervolt
UV2
CTL PS Undervolt
UV3
MC Answerback
PF
Input Phase Loss
LF
Output Phase Loss
Table 6.20 Resetable Faults
Meaning Probable Causes
The voltage fluctuations of the power supply are too high.
Corrective Actions
Check the input voltage.
A momentary power loss occurred.
DC Bus Undervoltage
The DC bus voltage is below the Undervoltage Detection Level
(L2-05). The default settings are:
200V class: 190 VDC
400 V class: 380 VDC
The terminal screws of the input power supply are loose.
An open-phase error occurred at the input terminals.
Check the wiring of the input terminals.
Check the input voltage and the wiring of the input terminals.
The acceleration time is set too short.
Extend the settings in
C1-01/03/05/07
Main Circuit MC
Operation Failure
The MC stopped responding during
Inverter operation.
An error occurred in the inrush current prevention circuit while the Inverter was running.
Replace the Inverter.
Control Power Supply
Undervoltage
Undervoltage of the control circuit while the Inverter was running.
External load was pulling down the
Inverter’s power supplies or there was an internal short in the power/gate drive board.
Remove all connection to the control terminals and cycle the power to the Inverter.
Replace the Inverter.
Inrush Current Prevention Circuit
Fault
An overheating of the charging resistor for the DC bus capacitors occurred.
The MC of the charging circuit did not respond 10 sec. after the MC ON signal has been output.
(Applicable Inverter Capacities
200 V class: 37 to 110 kW
400 V class: 75 to 300 kW)
The contactor of the inrush current prevention circuit is defective.
Cycle the power to the Inverter.
Replace the Inverter if the fault continues to occur.
Main Circuit Voltage Fault
An unusual big ripple on the DC bus voltage has been detected.
Only detected when L8-05=1
(enabled)
The wiring terminals for the input power supply are loose.
A phase loss occurred in the input power supply.
A momentary power loss occurred
Tighten the input terminal screws
The voltage fluctuations in the input power supply are too high.
The voltage balance between the input phases is bad.
Check the power supply voltage
Output Open-phase
An open-phase occurred at the
Inverter output.
The fault is detected when the output current falls below 5% of the inverter rated current and L8-07=1 (enabled)
There is a broken wire in the output cable.
There is a broken wire in the motorwinding.
The output terminals are loose.
The motor being used has a capacity less than 5% of the Inverter's maximum motor capacity.
Reset the fault after correcting its cause.
Check the motor and Inverter capacity.
6
6-
3
6-
4
Display
OH
Heatsink Overtemp
OH1
Heatsink Max Temp
RR
DynBrk Transistr
OL1
Motor Overload
OL2
Inv Overload
OL3
Car Stuck
OL4
Car Stuck
Meaning
Table 6.20 Resetable Faults
Probable Causes
Heatsink Overheat
The temperature of the Inverter's cooling fin exceeded the setting in L8-02 and L8-03 = 0 to 2.
The ambient temperature is too high.
There is a heat source nearby.
The Inverter's cooling fan(s) stopped.
Corrective Actions
Check for dirt build-up on the fans or heatsink.
Reduce the ambient temperature around the drive.
Inverter's Cooling Fan Stopped
Heatsink Overheat
The temperature of the Inverter’s heatsink exceeded 105 °C.
Inverter’s Cooling Fan Stopped
The Inverter's internal cooling fan has stopped
(18.5 kW and larger).
Replace the cooling fan(s).
The ambient temperature is too high.
There is a heat source nearby.
Check for dirt build-up on the fans or heatsink.
Reduce the ambient temperature around the drive.
The Inverter’s cooling fan(s) stopped.
The Inverter’s internal cooling fan has stopped
(18.5 kW and larger).
Replace the cooling fan(s).
Dynamic Braking Transistor
The built-in dynamic braking transistor failed.
Defective or failed dynamic braking resistor caused braking transistor damage.
Cycle power to the Inverter.
Replace the Inverter.
Motor Overload
Detected when L1-01 = 1 to 3 and the
Inverter’s output current exceeded the motor overload curve.
The overload curve is adjustable using parameter E2-01 (Motor Rated Current), L1-01 (Motor Protection Selection) and L2-02 (Motor Protection
Time Constant)
The load is too large. The acceleration time, deceleration time or cycle time are too short.
The voltage settings of the V/f pattern is incorrect for the application.
The setting of Motor Rated Current
(E2-01) is incorrect.
Recheck the cycle time and the size of the load as well as the accel/decel times
(C1-).
Check the V/f characteristics (E1-
).
Check the setting of Motor Rated
Current Setting (E2-01).
The load is too large. The acceleration time or deceleration times are too short.
Recheck the cycle time and the size of the load as well as the accel/decel times
(C1-).
Inverter Overload
The Inverter output current exceeded the Inverter’s overload capability.
The voltage settings of the V/f pattern is incorrect for the application.
Check the V/f characteristics (E1-
).
The size of the Inverter is too small.
Check the setting of Motor Rated
Current Setting (E2-01).
Overtorque/Car Stuck Detection 1
The Inverter’s output current (V/f control) or the output torque (Vector
Control) exceeded L6-02 for longer then the time set in
L6-03 and L6-01 = 3 or 4.
Overtorque/Car Stuck Detection 2
The Inverter’s output current (V/f control) or the output torque (Vector
Control) exceeded L6-05 for longer then the time set in
L6-06 and L6-04 = 3 or 4.
Motor was overloaded.
Motor was overloaded.
Ensure the values in L6-02 and
L6-03 are appropriate.
Check application/machine status to eliminate fault.
Ensure the values in L6-05 and
L6-06 are appropriate.
Check application/machine status to eliminate fault.
Protective and Diagnostic Functions
Display
UL3
Undertorq Det 1
UL4
Undertorq Det 2
OS
Overspeed Det
PGO
PG Open
DEV
Speed Deviation
SVE
Zero Servo Fault
CF
Out of Control
EF0
Opt External Flt
Table 6.20 Resetable Faults
Meaning
Undertorque Detection 1
The Inverter’s output current (V/f control) or the output torque (Vector control) fell below L6-02 for longer then the time set in
L6-03 and L6-04 = 7 or 8.
Probable Causes
Motor was underloaded.
Corrective Actions
Ensure the values in L6-02 and
L6-03 are appropriate.
Check application/machine status to eliminate fault.
Undertorque Detection 2
The Inverter’s output current (V/f control) or the output torque (Vector control) fell below L6-05 for longer then the time set in
L6-06 and L6-04 = 7 or 8.
Motor was underloaded.
Motor Overspeed
Detected when F1-03 = 0 to 2 and A1-
02 = 3.
The motor speed feedback
(U1-05) exceeded the setting in F1-08 for a longer time than the setting in
F1-09.
Overshooting/Undershooting are occurring.
The reference was too high.
The settings in F1-08 and F1-09 are not appropriate.
Ensure the values in L6-05 and
L6-06 are appropriate.
Check application/machine status to eliminate fault.
Adjust the ASR settings in the C5 parameter group.
Check the reference circuit and reference gain.
Check the settings in F1-08 and
F1-09.
There is a break in the PG wiring.
PG Disconnection
Detected when F1-02 = 0 to 2 and A1-
02 = 3
Detected when no PG (encoder) pulses are received for a time longer than the setting in F1-14.
The PG is wired incorrectly.
Power is not being supplied to the PG.
Fix the broken/disconnected wiring.
Fix the wiring.
Supply power to the PG properly.
Wrong brake control sequence when a brake is used.
Check if the brake is opened when the RUN command is applied.
The load is too large. Reduce the load.
Excessive Speed Deviation
Detected when F1-04 = 0 to 2 and A1-
02 = 3
The speed deviation is greater than the setting in F1-10 for a time longer than the setting F1-11
The acceleration time and deceleration time are too short.
The load is locked.
The settings in F1-10 and F1-11 are not appropriate.
Lengthen the acceleration time and deceleration time.
Check the mechanical system.
Check the settings in F1-10 and
F1-11.
Wrong brake control sequence when a brake is used.
Check if the brake is opened when the RUN command is applied.
Zero Servo Fault
The motor position moved during
Zero Servo Operation.
The torque limit is too small.
The load torque is too large.
-
Control Fault
A torque limit was reached continuously for 3 seconds or longer during a deceleration stop in Open Loop Vector control.
Motor parameters were not set properly.
Increase the torque limit.
Decrease the load torque.
Check for signal noise.
Check the motor parameters.
External fault input from Communications Option Card
An external fault condition was present, input from a communication option card.
Check for an external fault condition.
Verify the parameters.
Verify communication signals
6
6-
5
6-
6
Display
EF3
Ext Fault S3
EF4
Ext Fault S4
EF5
Ext Fault S5
EF6
Ext Fault S6
EF 7
Ext Fault S7
CE
Memobus Com Err
BUS
Option Com Err
SE1
Sequence Error 1
SE2
Sequence Error 2
SE3
Sequence Error 3
Meaning
Table 6.20 Resetable Faults
Probable Causes
External fault at terminal S3
External fault at terminal S4
External fault at terminal S5
External fault at terminal S6
An “external fault” was input from a multi-function input terminal (S3 to
S7).
Corrective Actions
Eliminate the cause of the external fault condition.
External fault at terminal S7
MEMOBUS Communication Error
Detected when control data was not received correctly for two seconds and
H5-04 = 0 to 2 and
H5-05=1.
Connection is broken and/or the master has stopped the communication.
Option Communication Error
After initial communication was established, the connection was lost.
Connection is broken and/or the master has stopped the communication.
Check the connections and all user-side software configurations.
Check the connections and all user-side software configurations.
Detected no output contactor answer back for S1-16 time setting.
The output contactor or auxiliary switch is malfunction.
Check the output contactor.
Detect the output current below 25% of no-load current at opening motor brake.
The output contactor is opened.
Detect the output current below 25% of no-load current during running.
The output contactor is opened.
Check the output contactor.
Check the output contactor.
Fig 6.21 Non-resetable Faults
CPF00
COM-ERR(OP&INV)
CPF01
COM-ERR(OP&INV)
CPF02
BB Circuit Err
CPF03
EEPROM Error
Digital Operator/Monitor Communication Fault 1
Communication with the digital operator could not be established within 5 seconds after the power was supplied to the Inverter.
Digital operator cable was not securely connected or digital operator is defective and/or control board is defective
Disconnect the Digital Operator/
Monitor and then connect it again.
Replace the Inverter.
Cycle the power to the Inverter.
CPU External RAM Fault The control board is damaged.
Replace the Inverter.
Digital Operator/Monitor Communication Fault 2
After communications with the digital operator was established, the communication stopped for 2 seconds or more.
Digital operator cable was not securely connected or digital operator is defective
The control board is damaged.
Disconnect the Digital Operator/
Monitor and then connect it again.
Cycle the power to the Inverter.
Replace the Inverter.
Baseblock circuit error
A baseblock circuit error occurred at power-up.
EEPROM error
Check sum is not valid
Gate array hardware failure at powerup.
Perform an initialization to factory defaults.
Cycle the power to the Inverter.
Replace the Inverter.
Noise or spike was on the control circuit input terminals or the control board is damaged.
Perform an initialization to factory defaults.
Cycle the power to the Inverter
Replace the Inverter.
Protective and Diagnostic Functions
CPF04
Internal A/D Err
CPF05
External A/D Err
CPF06
Option Error
CPF07
RAM-Err
CPF08
WAT-Err
CPF09
CPU-Err
CPF10
ASIC-Err
CPF20
Option A/D Error
CPF21
Option CPU Down
CPF22
Option Type Err
CPF23
Option DPRAM Err
Fig 6.21 Non-resetable Faults
CPU Internal A/D Converter Fault
CPU External A/D Converter Fault
Option Card Connection Fault
Noise or spike was on the control circuit input terminals or the control board is damaged.
Perform an initialization to factory defaults.
Cycle the power to the Inverter.
Replace the Inverter.
Noise or spike was on the control circuit input terminals or the control board is damaged.
Perform an initialization to factory defaults.
Cycle the power to the Inverter.
Replace the Inverter.
The Option Card is not connected properly.
Turn off the power and reinstall the Option Card again.
The Inverter or Option Card is damaged
Replace the Option Card or the
Inverter.
Cycle the power to the Inverter
ASIC Internal RAM fault
Watchdog Timer Fault
CPU-ASIC Mutual
Diagnosis Fault
The control circuit is damaged.
-
The control circuit is damaged.
-
The control circuit is damaged.
The control circuit is damaged.
Replace the Inverter.
Cycle the power to the Inverter
Replace the Inverter.
Cycle the power to the Inverter
Replace the Inverter.
Replace the Inverter.
ASIC version fault
Communication Option Card A/D Converter Error
Self-diagnosis Fault of
Option Board
Option board connection is not correct.
Option card A/D converter is faulty.
Turn off the power and re-install the option board again
Remove all inputs to the option board
Perform an initialization to factory defaults.
Cycle the power to the Inverter
Replace the option board
Replace the inverter
Perform an initialization to factory defaults.
Noise or spike was on the communication line and/or defective option board.
Cycle the power to the Inverter
Replace the option board
Option Board Code Number Fault
Option Board
Interconnection Fault
Replace the Inverter
Remove any option boards
Perform an initialization to factory defaults
Unrecognizable option board is connected to the control board. Cycle the power to the Inverter
Replace the option board
Replace the Inverter
Turn off the power and reinstall the option board again
An option board was not correctly connected to the control board, or an option board that was not made for the
Inverter is attached to the control board.
Perform an initialization to factory defaults
Cycle the power to the Inverter
Replace the option board
Replace the Inverter
6
6-
7
6-
8
Alarm Detection
Alarms are Inverter protection function that do not operate the fault contact output. The system will automatically return to its original status when the cause of the alarm has been removed.
During an alarm condition, the Digital Operator/Monitor display flashes and an alarm output is generated at the multi-function outputs (H2-01 to H2-03) if programmed
When an alarm occurs, take appropriate countermeasures according to the table below.
Display
EF
External Fault
(flashing)
Table 6.22 Alarm Detection
Meaning
Forward/Reverse Run Commands
Input Together
Both the forward and the reverse run commands are input simultaneously for 500ms or more. This alarm stops the motor.
Probable causes Corrective Actions
The external forward and reverse command were input simultaneously.
Check external sequence logic, so only one input is received at a time.
UV
DC Bus Undervolt
(flashing)
OV
DC Bus Overvolt
(flashing)
OH
Heatsnk Overtmp
(flashing)
DC Bus Undervoltage
The following conditions occurred
• The DC bus voltage was below the
Undervoltage Detection Level Setting (L2-05).
• The MC of the inrush current prevention circuit opened.
• The control power supply voltage when below the CUV level.
UV Alarm is only detected when the drive is in a stopped condition
For the probable causes please have a look at UV1, UV2 and UV3 in table
7.1.
For the corrective actions please have a look at UV1, UV2 and
UV3 in table 7.1
DC Bus Overvoltage
The DC bus voltage exceeded the overvoltage detection level.
200 V class: 410 VDC
400 V class: 820 VDC
OV Alarm is only detected when the drive is in a stopped condition
The power supply voltage is too high.
Check the power supply and decrease the voltage to meet the
Inverter’s specifications
Heatsink Overheat
The temperature of the Inverter's cooling fin exceeded the temperature programmed in L8-02.
Enabled when L8-03 = 3
The ambient temperature is too high.
There is a heat source nearby.
The Inverter cooling fan(s) has stopped.
Check for dirt build-up on the fans or heatsink.
Reduce the ambient temperature around the Inverter
Replace the cooling fan(s).
OL3
Car Stuck
(flashing)
Overtorque Detection 1
The Inverter’s output current (V/f control) or the output torque (Vector control) exceeded L6-02 for longer then the time set in
L6-03 and L6-01 = 1 or 2
Motor was overloaded
Ensure the values in L6-02 and
L6-03 are appropriate.
Check application/machine status to eliminate fault.
OL4
Car Stuck
(flashing)
Overtorque Detection 1
The Inverter’s output current (V/f control) or the output torque (Vector control) exceeded L6-02 for longer then the time set in
L6-03 and L6-01 = 1 or 2
Motor was overloaded
Ensure the values in L6-05 and
L6-06 are appropriate.
Check application/machine status to eliminate fault.
Protective and Diagnostic Functions
EF3
Ext Fault S3
(flashing)
EF4
Ext Fault S4
(flashing)
EF5
Ext Fault S5
(flashing)
EF6
Ext Fault S6
(flashing)
EF7
Ext Fault S7
(flashing)
Display
UL3
Undertorque Det 1
(flashing)
UL4
Undertorque Det 2
(flashing)
OS
Overspeed Det
(flashing)
PGO
PG Open
(flashing)
DEV
Speed Deviation
(flashing)
EF0
Opt External Flt
(flashing)
Meaning
Table 6.22 Alarm Detection
Probable causes
Undertorque Detection 1
The Inverter’s output current (V/f control) or the output torque (Vector control) fell below L6-02 for longer then the time set in L6-03 and L6-01 =
5 or 6.
Motor was underloaded
Corrective Actions
Ensure the values in L6-02 and
L6-03 are appropriate.
Check application/machine status to eliminate fault.
Undertorque Detection 2
The Inverter’s output current (V/f control) or the output torque (Vector control) fell below L6-05 for longer then the time set in L6-06 and L6-04 =
5 or 6.
Motor was underloaded
Ensure the values in L6-05 and
L6-06 are appropriate.
Check application/machine status to eliminate fault.
Overspeed Alarm
Detected when A1-02 = 1 or 3 and F1-
03 = 3.
The motor speed feedback
(U1-05) exceeded the value set in F1-
08 for a time longer than the setting in
F1-09.
Overshooting/undershooting are occurring.
The reference was too high.
The settings in F1-08 and F1-09 are not appropriate.
Adjust the ASR settings in the C5 parameter group.
Check the reference circuit and reference gain.
Check the settings in F1-08 and
F1-09
PG Disconnection
Detected when F1-02 = 3 and A1-02 =
1 or 3.
Detected when no PG (encoder) pulses are received for a time longer than the setting in F1-14
There is break in the PG wiring.
The PG is wired incorrectly.
Fix the broken/disconnected wiring.
Fix the wiring
Power is not being supplied to the PG. Fix the wiring.
Power isn't being supplied to the PG.
Supply power to the PG properly.
The load is too large.
Excessive Speed Deviation
Detected when F1-04 = 3 and
A1-02 = 1 or 3.
The speed deviation is greater than the setting in F1-10 for longer than the setting in F1-11.
The acceleration time and deceleration time are too short.
The load is locked.
The settings in F1-10 and F1-11 are not appropriate.
Reduce the load.
Lengthen the acceleration time and deceleration time.
Check the mechanical system.
Check the settings in F1-10 and
F1-11.
Communication Option Card External
Fault
An external fault condition was present, input from a communication option card.
Check for an external fault condition.
Verify the parameters.
Verify communication signals
External fault at terminal S3
External fault at terminal S4
External fault at terminal S5
External fault at terminal S6
External fault at terminal S7
An external fault was input from a multi-function input terminal
(S3 to S7) that is programmed for external fault function that alarms only and continues to run the Inverter.
Eliminate the cause of the external fault condition
6
6-
9
6-
10
Display
CE
MEMOBUS Com Err
(flashing)
BUS
Option Com Err
(flashing)
Ext Run Active
Cannot Reset
CALL
ComCall
(flashing)
Table 6.22 Alarm Detection
Meaning Probable causes
MEMOBUS Communications Alarm
Detected when control data was not received correctly for two seconds and
H5-04 = 3 and
H5-05 = 1.
Connection is broken and/or the master has stopped the communication.
Corrective Actions
Check the connections and all user-side software configurations.
Option Communications Alarm
After initial communication was established, the connection was lost.
Connection is broken and/or the master has stopped the communication.
Check the connections and all user-side software configurations.
Detected when a RESET command is input while the RUN command is still active
The RUN command has not been removed and a RESET command is input by digital input or by the
RESET button on the digital operator.
Remove the RUN signal first and reset the error.
Communications on Standby
Communication has not yet been established.
Connection was not made properly or user software was not configured to the proper baud rate or configuration
(e.g. Parity).
Check the connections and all user-side software configurations.
Protective and Diagnostic Functions
Operator Programming Errors
An Operator Programming Error (OPE) occurs when an inapplicable parameter is set or an individual parameter setting is inappropriate. The Inverter will not operate until the parameter is set correctly; however, no alarm or fault outputs will occur. If an OPE occurs, change the appropriate parameter by checking the cause shown in
. When OPE error is displayed, press the ENTER key to display U1-34 (OPE Detected).
This monitor will display the parameter that is causing the OPE error.
Display
OPE01 kVA Selection
OPE02
Limit
OPE03
Terminal
Table 6.23 Operator Programming Errors
Meaning
Inverter kVA Setting Error
Parameter Setting
Out of Range
Multi-function Input
Selection Error
Probable Causes
The control board was replaced and the kVA parameter (o2-04) is set incorrectly
Corrective Actions
Enter the correct kVA setting (o2-
04) by referring to the table “Factory settings that change with the
Inverter kVA setting” on page 5-
60.
Parameter setting was outside of the allowable range.
Verify the parameter settings.
One of the following errors has been made in the multi-function input (H1-
01 to H1-05) settings:
• Duplicate functions were selected.
• External Baseblock NO (8) and
External Baseblock NC (9) were selected at the same time.
• The Emergency Stop Command
NO (15) and NC(17) are set simultaneously.
Verify the parameter settings in
H1-
OPE05
Sequence Select
OPE06
PG Opt Missing
OPE08
Constant Selection
OPE10
V/f Ptrn Setting
RUN/Reference Command
Selection Error
The Reference Source Selection b1-01 and/or the RUN Source Selection parameter b1-02 are set to 3 (option board) but no option board is installed.
Option board is not installed or is installed incorrectly
Control method selection error
Verify that the board is installed.
Remove the power supply and reinstall the option board again
Recheck the setting of b1-01 and b1-02.
One of the control methods needing a
PG feedback was selected (A1-02 =3), but a PG option board is not installed.
Verify the control method selection in parameter A1-02 and/or the installation of the PG option board.
Function Selection Error
V/f Parameter Setting Error
A setting has been made that is applicable with the current control method.
Example: A function used only with open loop vector control was selected for V/f control.
Verify the control method and the function.
V/f parameter settings were out of range.
Check parameters (E1-). A frequency/voltage value may be set higher than the maximum frequency/voltage.
Cycle power to the Inverter.
ERR
EEPROM R/W Err
EEPROM write error
The NV-RAM data does not match the
EEPROM data.
A verification error occurred when writing EEPROM.
Do a factory initialization (A1-03)
6
6-
11
6-
12
Auto-tuning Fault
Auto-tuning faults are shown below. When the following faults are detected, the fault is displayed on the digital operator and the motor coasts to stop. No fault or alarm outputs will be operated.
Display
Er - 01
Fault
Meaning
Table 6.24 Auto-tuning Fault
Probable causes
There is an error in the data input for autotuning.
Corrective Actions
Check the input data.
Motor data fault
There is an error in the relationship between the motor output and the motor rated current.
Check the Inverter and motor capacity.
There is an error between the no-load current setting and the input motor rated current (when auto-tuning for line-to-line resistance is performed for vector control)
Check the motor rated current and no-load current.
Check the input data.
Er - 02
Minor Fault
Alarm
Er - 03
STOP key
STOP key input
An alarm is detected during auto-tuning.
Check wiring and the machine.
Check the load.
The STOP key was pressed to cancel autotuning.
-
Er - 04
Resistance
Line-to-Line Resistance Fault
Er - 05
No-Load Current
Er - 08
Rated slip
No-Load Current Fault
Rated Slip Fault
Autotuning was not completed in the specified time.
The auto-tuning result is outside the parameter setting range.
• Check the input data.
• Check motor wiring.
• If the motor is connected to the machine, disconnect it.
• If the setting of T1-03 is higher than the Inverter input power supply voltage (E1-01), change the input data.
Er - 09
Accelerate
Er - 11
Motor Speed
Er - 12
I-det. Circuit
Acceleration Fault
Detected only for rotating auto-tuning
Motor speed Fault
Detected only for rotating autotuning
The motor did not accelerate in the specified time
• Increase C1-01 (Acceleration
Time 1).
• Increase L7-01 and L7-02
(Torque Limits) if they are low.
• If the motor is connected to the machine, disconnect it.
The torque reference exceed 100% during acceleration.
Detected when A1-02 = 2 or 3 (Vector control).
• 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).
Current Detection Fault
The current exceeded the motor rated current.
Check wiring of the Inverter and the mounting.
Any of U/T1, V/T2 and W/T3 has open-phase
Protective and Diagnostic Functions
Display
Er - 13
Leakage Inductance Fault
End - 1
V/f Over Setting
End - 2
Saturation
End - 3
Rated FLA Alm
Meaning
Leakage Inductance Fault
Table 6.24 Auto-tuning Fault
Probable causes Corrective Actions
Auto-tuning was not completed in the specified time.
Check motor wiring.
Auto-tuning result is outside the parameter setting range.
V/f Settings Alarm
Displayed after auto-tuning is complete
The torque reference exceeded 100% and the no-load current exceeded 70% during auto-tuning.
Check and correct the motor settings
If the motor and the machine are connected, disconnect the motor from the machine.
Motor Core Saturation Fault
Displayed after auto-tuning is complete.
Detected only for rotating autotuning
Rated Current Setting Alarm
Displayed after auto-tuning is complete
During auto-tuning, the measured values of motor iron-core saturation coefficient 1 and 2 (E2-07 and E2-08) exceeded its setting range. A temporary value was set: E2-07 = 0.75, E2-
08 = 0.50
Check the input data.
Check the motor wiring.
If the motor and the machine are connected, disconnect the motor from the machine.
During auto-tuning, the measured value of motor rated current
(E2-01) was greater than the set value.
Check the motor rated current value.
6
6-
13
6-
14
Digital Operator Copy Function Faults
These faults can occur during the digital operator COPY function. When a fault occurs, the fault content is displayed on the operator. A fault does not activate the fault contact output or alarm output.
Function
READ
Function
COPY
Function
Verify
Function
Table 6.25 Digital Operator/Monitor Copy Function Faults
Digital Operator/Monitor
Display
Probable Causes
PRE
READ IMPOSSIBLE
Corrective Actions o3-01 was set to 1 to write parameter into the Digital Operator/Monitor when the Operator was write-protected (o3-02 = 0).
Set o3-02 to enable writing parameters into the
Operator’s memory.
IFE
READ DATA ERROR
RDE
DATA ERROR
CPE
ID UNMATCHED
VAE
INV. KVA UNMATCH
CRE
CONTROL
UNMATCHED
CYE
COPY ERROR
CSE
SUM CHECK ERROR
VYE
VERIFY ERROR
The data file read from the Inverter was of the wrong size indicating corrupted data.
An attempted writing of the Inverter data to the
Digital Operator/Monitor’s EEPROM failed.
The Inverter type or software number was different from the stored data in the digital operator
Retry the READ command (o3-01 = 1).
Check the Digital Operator/Monitor’s cable.
Replace the Digital Operator/Monitor.
A low Inverter voltage has been detected.
Retry the READ command (o3-01 = 1).
Replace the Digital Operator/Monitor.
Use stored data of the same product (L7) and software number (U1-14) only.
The capacity of the Inverter and the capacity of the stored data in the Digital Operator/Monitor are different.
Use stored data for the same Inverter capacity only (o2-04).
The control method of the Inverter and the control method of the stored data in the Digital Operator/
Monitor are different.
Use stored data for the same control method (A1-02).
A parameter setting written to the Inverter was different from the setting stored in the Digital
Operator/Monitor.
Upon completion of the COPY function, the
Inverter’s data checksum was different than the digital operator’s data checksum.
The set value of the digital operator and the
Inverter do not match
Retry the COPY function (o3-01 = 2)
Retry the COPY function (o3-01 = 2)
Retry the Verify function (o3-01 = 3)
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