Do not examine, connect, or disconnect wiring on an energized drive. Before servicing, disconnect
all power to the equipment and wait for the time specified on the warning label at a minimum. The
internal capacitor stays charged after the drive is de-energized. The charge indicator LED
extinguishes when the DC bus voltage decreases below 50 Vdc. When all indicators are OFF,
measure for dangerous voltages to make sure that the drive is safe.
If you do work on the drive when it is energized, it will cause serious injury or death from electrical shock.
Disconnect all power to the drive and wait for the time specified on the warning label before you
remove covers. Check the drive for dangerous voltages before servicing or repair work.
If you do work on the drive when it is energized and there is no cover over the electronic circuits, it will cause
serious injury or death from electrical shock. The drive has internal capacitors that stay charged after you deenergize the drive.
WARNING
Electrical Shock Hazard
The motor will run after you de-energize the drive. PM motors can generate induced voltage to the
terminal of the motor after you de-energize the drive.
If you touch a motor that is moving or energized, it can cause serious injury or death.
Do not operate the drive when covers are missing. Replace covers and shields before you operate
the drive. Use the drive only as specified by the instructions.
Some figures in this section include drives without covers or safety shields to more clearly show the inside of the
drive. If covers or safety shields are missing from the drive, it can cause serious injury or death.
Always ground the motor-side grounding terminal.
If you do not ground the equipment correctly, it can cause serious injury or death if you touch the motor case.
Only let approved personnel install, wire, maintain, examine, replace parts, and repair the drive.
If personnel are not approved, it can cause serious injury or death.
Do not wear loose clothing or jewelry when you do work on the drive. Tighten loose clothing and
remove all metal objects, for example watches or rings.
Loose clothing can catch on the drive and jewelry can conduct electricity and cause serious injury or death.
Fire Hazard
Tighten all terminal screws to the correct tightening torque.
Connections that are too loose or too tight can cause incorrect operation and damage to the drive. Incorrect
connections can also cause death or serious injury from fire.
Damage to Equipment
Do not apply incorrect voltage to the main circuit of the drive. Operate the drive in the specified
range of the input voltage on the drive nameplate.
Voltages that are higher than the permitted nameplate tolerance can cause damage to the drive.
Fire Hazard
Do not put flammable or combustible materials on top of the drive and do not install the drive near
flammable or combustible materials. Attach the drive to metal or other noncombustible material.
Flammable and combustible materials can start a fire and cause serious injury or death.
Modifications to drive body and circuitry can cause serious injury or death, will cause damage to the drive, and will
void the warranty. Yaskawa is not responsible for modifications of the product made by the user.
Sudden Movement Hazard
Make sure that you align the phase order for the drive and motor when you connect the motor to
drive output terminals U/T1, V/T2, and W/T3.
If the phase order is incorrect, it can cause the motor to run in reverse. If the motor accidentally runs in reverse, it
can cause serious injury or death.
CAUTION
Burn Hazard
Do not touch a hot drive heatsink. De-energize the drive, wait for a minimum of 15 minutes, then
make sure that the heatsink is cool before you replace the cooling fans.
If you touch a hot drive heatsink, it can burn you.
NOTICE
Damage to Equipment
When you touch the drive and circuit boards, make sure that you observe correct electrostatic
discharge (ESD) procedures.
If you do not follow procedures, it can cause ESD damage to the drive circuitry.
Use the instructions in this manual to replace the cooling fans. When you do maintenance on the
fans, replace all the fans to increase product life.
If you install the fans incorrectly, it can cause damage to the drive.
Make sure that all connections are correct after you install the drive and connect peripheral
devices.
Incorrect connections can cause damage to the drive.
Do not energize and de-energize the drive more frequently than one time each 30 minutes.
If you frequently energize and de-energize the drive, it can cause drive failure.
Do not operate a drive or connected equipment that has damaged or missing parts.
You can cause damage to the drive and connected equipment.
Note:
Do not use unshielded cable for control wiring. Use shielded, twisted-pair wires and ground the shield to the ground terminal of the drive.
Unshielded wire can cause electrical interference and unsatisfactory system performance.
Power electronics have limited life and can show changes in performance and deterioration of performance after years
of use in usual conditions. To help prevent these problems, it is important to do preventive maintenance and regular
inspection, and replace parts on the drive.
Drives contain different types of power electronics, for example power transistors, semiconductors, capacitors,
resistors, fans, and relays. The electronics in the drive are necessary for correct motor control.
Follow the inspection lists in this chapter as a part of a regular maintenance program.
Note:
Examine the drive one time each year at a minimum.
The operating conditions, environmental conditions, and use conditions will have an effect on the examination frequency for connected
equipment.
Examine the drive more frequently if you use the drive in bad conditions or in these conditions:
• High ambient temperatures
• Frequent starting and stopping
• Changes in the AC power supply or load
• Too much vibration or shock loading
• Dust, metal dust, salt, sulfuric acid, or chlorine atmospheres
• Unsatisfactory storage conditions.
◆ Recommended Daily Inspection
Table 1.1 gives information about the recommended daily inspection for Yaskawa drives. Examine the items in Table
1.1 each day to make sure that the components do not wear out or fail. Make a copy of this checklist and put a check
mark in the “Checked” column after each inspection.
Power Supply Voltage Examine main power supply and control voltages.
Examine for unusual oscillation or noise coming from
the motor.
Examine for unusual heat from the drive or motor and
visible discoloration.
Examine the cooling fans.
Make sure that the installation environment is
applicable.
Make sure that the drive output current is not more
than the motor or drive rating for an extended period of
time.
• Check the load coupling.
• Measure motor vibration.
• Tighten all loose components.
• Check for a load that is too heavy.
• Tighten loose screws.
• Check for a dirty heatsink or motor.
• Measure the ambient temperature.
• Check for a clogged or dirty fan.
• Use the performance life monitor to check for correct fan operation.
Remove the source of contamination or correct unsatisfactory environment.
• Check for a load that is too heavy.
• Check the correct motor parameter settings.
• Correct the voltage or power supply to agree with nameplate specifications.
• Verify all main circuit phases.
◆ Recommended Periodic Inspection
Table 1.2 to Table 1.6 give information about the recommended periodic inspections for Yaskawa drives. Examine the
drive one time each year at a minimum. The operating conditions, environmental conditions, and use conditions will
have an effect on the examination frequency for connected equipment. You must use your experience with the
application to select the correct inspection frequency for each drive installation. Periodic inspections will help to
prevent performance deterioration and product failure. Make a copy of this checklist and put a check mark in the
“Checked” column after each inspection.
DANGER! Electrical Shock Hazard. Do not examine, connect, or disconnect wiring on an energized drive. Before servicing,
disconnect all power to the equipment and wait for the time specified on the warning label at a minimum. The internal capacitor
stays charged after the drive is de-energized. The charge indicator LED extinguishes when the DC bus voltage decreases below 50
Vdc. When all indicators are OFF, measure for dangerous voltages to make sure that the drive is safe. If you do work on the drive
when it is energized, it will cause serious injury or death from electrical shock.
Table 1.2 Main Circuit Periodic Inspection Checklist
Examine for dirt, unwanted particles, or dust on
components.
• Examine wiring and connections for discoloration
or damage. Examine wiring and connections for
discoloration from too much heat.
• Examine wire insulation and shielding for
discoloration and wear.
Examine terminals for stripped, damaged, or loose
connections.
• Examine contactors and relays for too much noise
during operation.
• Examine coils for signs of too much heat, such as
melted or broken insulation.
Examine the insulation for discoloration from too
much heat.
• Examine for leaks, discoloration, or cracks.
• Examine if the cap has come off, if there is
swelling, or if there are leaks from broken sides.
Examine for dust or other unwanted material collected
on the surface.
• Replace damaged components as necessary.
• The drive does not have many serviceable parts and it could be necessary to
replace the drive.
• Examine enclosure door seal.
• Use a vacuum cleaner to remove unwanted particles and dust without touching
the components.
• If you cannot remove unwanted particles and dust with a vacuum cleaner,
replace the components.
Repair or replace damaged wiring.
• Tighten loose screws.
• Replace damaged screws.
• Check coil voltage for overvoltage or undervoltage conditions.
• Replace broken relays, contactors, or circuit boards that you can remove.
If there is discoloration in the option, check to make sure that there is not damage to
the wiring. A small quantity of discoloration is not a problem.
The drive does not have many serviceable parts and it could be necessary to replace
the drive.
Use a vacuum cleaner to remove unwanted particles and dust without touching the
components.
The drive Maintenance Monitors keep track of component wear and tell the user when the end of the estimated
performance life is approaching. The Maintenance Monitors prevent the need to shut down the full system for
unexpected problems. Users can set alarm notifications for the maintenance periods for these drive components:
• Cooling fan
• Electrolytic capacitor
• Soft charge bypass relay
• IGBT
Contact Yaskawa or your nearest sales representative for more information about part replacement.
◆ Replaceable Parts
You can replace these parts of the drive:
• Cooling fan
If there is a failure in the main circuit, replace the drive.
If the drive is in the warranty period, contact Yaskawa or your nearest sales representative before you replace parts.
Yaskawa reserves the right to replace or repair the drive as specified by the Yaskawa warranty policy.
DANGER! Electrical Shock Hazard. Do not examine, connect, or disconnect wiring on an energized drive. Before servicing,
disconnect all power to the equipment and wait for the time specified on the warning label at a minimum. The internal capacitor
stays charged after the drive is de-energized. The charge indicator LED extinguishes when the DC bus voltage decreases below 50
Vdc. When all indicators are OFF, measure for dangerous voltages to make sure that the drive is safe. If you do work on the drive
when it is energized, it will cause serious injury or death from electrical shock.
◆ Part Replacement Guidelines
Table 1.7 shows the standard replacement period for replacement parts. When you replace these parts, make sure that
you use Yaskawa replacement parts for the applicable model and design revision number of your drive.
Table 1.7 Standard Replacement Period
PartsStandard Replacement Period
Cooling fan10 years
Electrolytic capacitor
*1If there is damage to parts that you cannot repair or replace, replace the drive.
Note:
Performance life estimate is based on these use conditions. These conditions are provided for the purpose of replacing parts to maintain
performance. Some parts may require more frequent replacement due to poor environments or rigorous use. Operating conditions for
performance life estimate: Ambient temperature: Yearly average of 40 °C (IP20/UL Open Type), Load factor: 80%, Operating rate: 24 hours
a day
*1
10 years
◆ Monitors that Display the Lifespan of Drive Components
The drive keypad shows percentage values for the replacement parts to help you know when you must replace those
components. Use the monitors in Table 1.8 to check replacement periods. When the monitor value is 100%, the
component is at the end of its useful life and there is an increased risk of drive malfunction. Yaskawa recommends
that you check the maintenance period regularly to make sure that you get the maximum performance life.
Table 1.8 Performance Life Monitors
Monitor No.PartsDescription
U4-03
U4-04
U4-05Electrolytic Capacitor
Cooling fan
Shows the total operation time of fans as 0 to 99999 hours. After this value is 99999, the drive automatically resets it
to 0.
Shows the total fan operation time as a percentage of the specified maintenance period.
Shows the total capacitor usage time as a percentage of the specified maintenance period.
Shows the number of times the drive is energized as a percentage of the performance life of the inrush circuit.
Shows the percentage of the maintenance period for the IGBTs.
◆ Alarm Outputs for Maintenance Monitors
You can use H2-xx [MFDO Function Selection] to send a message that tells you when a specified component is near
the end of its performance life estimate. Set the applicable value to H2-xx as shown in Table 1.9 for your component.
When the specified component is near the end of its performance life estimate, the MFDO terminals set for H2-xx =2F [Maintenance Notification] will activate, and the keypad will show an alarm that identifies the component to
replace.
Table 1.9 Maintenance Period Alarms
DisplayAlarm NameCausePossible Solutions
LT-1
LT-2
LT-3
LT-4
TrPC
Cooling Fan
Maintenance Time
Capacitor Maintenance
Time
SoftChargeBypassRe
lay MainteTime
IGBT Maintenance
Time (50%)
IGBT Maintenance
Time (90%)
The cooling fan is at 90% of its expected
performance life.
The capacitors for the main circuit and control
circuit are at 90% of expected performance life.
The soft charge bypass relay is at 90% of its
performance life estimate.
The IGBT is at 50% of its expected performance
life.
The IGBT is at 90% of its expected performance
life.
Replace the cooling fan, then set o4-03 = 0 [Fan OperationTime Setting = 0 h] to reset the cooling fan operation time.
Replace the board or the drive.
Contact Yaskawa or your nearest sales representative to
replace the board.
Replace the board or the drive.
Contact Yaskawa or your nearest sales representative to
replace the board.
Check the load, carrier frequency, and output frequency.
Replace the IGBT or the drive.
Digital Outputs
(Setting Value in
H2-xx)
2F
10
◆ Related Parameters
Replace the component, then set o4-03, o4-05, o4-07, and o4-09 [Maintenance Setting] = 0 to reset the Maintenance
Monitor. If these parameters are not reset after the corresponding parts have been replaced, the Maintenance Monitor
function will continue to count down the performance life from the value that was reached with the old part. If the
Maintenance Monitor is not reset, the drive will not have the correct value of the performance life for the new
component.
Note:
The maintenance period changes for different operating environments.
Table 1.10 Maintenance Setting Parameters
No.NameFunction
o4-03Fan Operation Time SettingSets the value from which to start the cumulative drive cooling fan operation time in 10-hour units.
Note:
When o4-03 = 30 has been set, the drive will count the operation time for the cooling fan from 300 hours and
U4-03 [Cooling Fan Ope Time] will show 300 h.
o4-05
o4-07Softcharge Relay Maintenance SetSets as a percentage the value from which to start the count for the soft charge bypass relay maintenance time.
o4-09IGBT Maintenance SettingSets the value from which to start the count for the IGBT maintenance period as a percentage.
Capacitor Maintenance SettingSets the value from which to start the count for the main circuit capacitor maintenance period as a percentage.
NOTICE: Use the instructions in this manual to replace the cooling fans. When you do maintenance on the fans, replace all the fans
to increase product life. If you install the fans incorrectly, it can cause damage to the drive.
To replace a cooling fan, contact Yaskawa or your nearest sales representative.
◆ Number of Cooling Fans
Table 1.11 Single-Phase 200 V Class
ModelCooling FansReplacement ProcedureRef.
B001 - B006-
B010, B0121
B0182B
Table 1.12 Three-Phase 200 V Class
ModelCooling FansReplacement ProcedureRef.
2001-2004-
2006 - 20211A
20301B
2042 - 20822A17
--
A
--
17
17
20
Table 1.13 Three-Phase 400 V Class
ModelCooling FansReplacement ProcedureRef.
4001 - 4004-
4005 - 40121
4018, 40231B
4031 - 40602A17
--
A17
20
◆ Replace the Cooling Fan (Procedure A)
DANGER! Electrical Shock Hazard. Do not examine, connect, or disconnect wiring on an energized drive. Before servicing,
disconnect all power to the equipment and wait for the time specified on the warning label at a minimum. The internal capacitor
stays charged after the drive is de-energized. The charge indicator LED extinguishes when the DC bus voltage decreases below 50
Vdc. When all indicators are OFF, measure for dangerous voltages to make sure that the drive is safe. If you do work on the drive
when it is energized, it will cause serious injury or death from electrical shock.
CAUTION! Burn Hazard. Do not touch a hot drive heatsink. De-energize the drive, wait for a minimum of 15 minutes, then make
sure that the heatsink is cool before you replace the cooling fans. If you touch a hot drive heatsink, it can burn you.
NOTICE: Use the instructions in this manual to replace the cooling fans. When you do maintenance on the fans, replace all the fans
to increase product life. If you install the fans incorrectly, it can cause damage to the drive.
The connector installation position is different for different models.
Figure 1.6 Put the Connector in the Recess
Figure 1.7 Put the Connector in Between the Fans
Figure 1.8 Put the Connector in Between the Drive and Fan
4. Insert the fan cover straight until the hook clicks into place.
Figure 1.9 Reattach the Fan Finger Guard
5. Energize the drive and set o4-03 = 0 [Fan Operation Time Setting = 0 h] to reset the cooling fan operation
time.
◆ Replace the Cooling Fan (Procedure B)
DANGER! Electrical Shock Hazard. Do not examine, connect, or disconnect wiring on an energized drive. Before servicing,
disconnect all power to the equipment and wait for the time specified on the warning label at a minimum. The internal capacitor
stays charged after the drive is de-energized. The charge indicator LED extinguishes when the DC bus voltage decreases below 50
Vdc. When all indicators are OFF, measure for dangerous voltages to make sure that the drive is safe. If you do work on the drive
when it is energized, it will cause serious injury or death from electrical shock.
CAUTION! Burn Hazard. Do not touch a hot drive heatsink. De-energize the drive, wait for a minimum of 15 minutes, then make
sure that the heatsink is cool before you replace the cooling fans. If you touch a hot drive heatsink, it can burn you.
NOTICE: Use the instructions in this manual to replace the cooling fans. When you do maintenance on the fans, replace all the fans
to increase product life. If you install the fans incorrectly, it can cause damage to the drive.
You can remove the control circuit board of the drive and install a new board. If there is a failure in the drive, you can
use this feature to easily replace the control circuit board.
A - Control circuit board
Figure 1.16 Control Circuit Terminal Block
◆ Replace the Drive
DANGER! Electrical Shock Hazard. Disconnect all power to the drive and wait for the time specified on the warning label before you
remove covers. Check the drive for dangerous voltages before servicing or repair work. If you do work on the drive when it is
energized and there is no cover over the electronic circuits, it will cause serious injury or death from electrical shock. The drive has
internal capacitors that stay charged after you de-energize the drive.
DANGER! Electrical Shock Hazard. Do not examine, connect, or disconnect wiring on an energized drive. Before servicing,
disconnect all power to the equipment and wait for the time specified on the warning label at a minimum. The internal capacitor
stays charged after the drive is de-energized. The charge indicator LED extinguishes when the DC bus voltage decreases below 50
Vdc. When all indicators are OFF, measure for dangerous voltages to make sure that the drive is safe. If you do work on the drive
when it is energized, it will cause serious injury or death from electrical shock.
WARNING! Electrical Shock Hazard. Only let approved personnel install, wire, maintain, examine, replace parts, and repair the
drive. If personnel are not approved, it can cause serious injury or death.
NOTICE: Damage to Equipment. When you touch the drive and circuit boards, make sure that you observe correct electrostatic
discharge (ESD) procedures. If you do not follow procedures, it can cause ESD damage to the drive circuitry.
■ Notes on Wiring the Main Circuit Terminal Block
Read these notes before you wire the main circuit terminal block.
• Use UL-Listed, vinyl-coated insulated copper wires for operation with a continuous maximum permitted
temperature of 75 °C at 600 V.
• Remove all unwanted objects that are near the terminal block connections.
• Remove the insulation from the connection wires to the wire stripping lengths shown in the manual.
• Do not use bent or crushed wires. Remove the damaged end of the wire before you use it. Incorrect connections can
cause death or serious injury from fire.
• Do not solder stranded wire. Soldered wire connections can become loose over time and cause unsatisfactory drive
performance.
• If you use stranded wire, make sure that all of the wire strands are in the connection. Also, do not twist the stranded
wire too much. Incorrect connections can cause death or serious injury from fire.
• Put the wire all the way into the terminal block. Remove the insulation from the wire to the recommended wire
stripping length to fit the wire with insulation in the plastic housing.
• Use a torque driver, torque ratchet, or torque wrench for the screws. A slotted driver or a hex tool will be necessary
to wire the screw clamp terminal. Use applicable tools as specified by the recommended conditions in the product
manual.
*1When you wire drive models 2042, 2056, 4031, 4038, 4044, and 4060, select the correct tools for the wire gauge.
*2Use 6.35 mm (0.25 in) bit socket holder.
*3Use a torque wrench that can apply this torque measurement range.
■ Remove the Control Circuit Board
Remove the front cover and keypad from the drive.
1. Push the tabs to the left that hold the control board to the drive.
Torque Wrench
(Tightening Torque)
-
4.1 - 4.5 N∙m
(36.3 - 39.8 in∙lb)
5 - 9 N∙m
(44.3 - 79.7 in∙lb)
*2 *3
*2 *3
Figure 1.20 Unhook the Tabs
2. Pull the left side of the control circuit board out first.
Figure 1.21 Remove the Control Circuit Board
■ Put the Control Circuit Board in a New Drive
Remove the keypad, front cover, and control circuit board of the new drive.
Wire the main circuit terminals of the new drive, then attach the wired control circuit board.
The chemicals in the electrolytic capacitors and other electronic parts of the drive change over time. When you store
the drive for long periods of time, use the information in this section to help keep the performance life estimates.
◆ Storage Location
• Temperature and Humidity
When you store the drive for approximately one month, for example during shipping, you can put the drive in a
location where the temperature is -20 °C to +70 °C (-4 °F to +158 °F). Correctly package and store the drive during
shipping to prevent vibration and impact damage.
Do not put the drive in direct sunlight or where there will be condensation or ice. Put the drive in a location where
the relative humidity is 95% or less.
• Dust and Oil Mist
Do not keep the drive locations with dust or oil mist. For example, cement factories and cotton mills.
• Corrosive Gas
Do not keep the drive in locations with corrosive gas. For example, chemical plants, refineries, and sewage plants.
• Salt Damage
Do not keep the drive in salty locations. For example, locations near the ocean, and salt damage-designated
locations.
Do not keep the drive in unsatisfactory locations. Keep all drives in storage rooms that are safe from unsatisfactory
elements.
◆ Regular Application of Power
To prevent deterioration of the capacitors, Yaskawa recommends that you apply power to the drive a minimum of one
time each year for a minimum of 30 minutes.
If you store the drive for longer than two years and do not apply power, Yaskawa recommends that you use a variable
power source and gradually increase the power from 0 V to the rated drive voltage over a period of 2 to 3 minutes.
Apply power for a minimum of 1 hour with no load to reform the main circuit electrolytic capacitor. When you
operate the drive after you apply power, wire the drive correctly and check for drive faults, overcurrents, motor
vibration, motor speed differences, and other defects during operation.
Do not examine, connect, or disconnect wiring on an energized drive. Before servicing, disconnect
all power to the equipment and wait for the time specified on the warning label at a minimum. The
internal capacitor stays charged after the drive is de-energized. The charge indicator LED
extinguishes when the DC bus voltage decreases below 50 Vdc. When all indicators are OFF,
measure for dangerous voltages to make sure that the drive is safe.
If you do work on the drive when it is energized, it will cause serious injury or death from electrical shock.
WARNING
Electrical Shock Hazard
Do not operate the drive when covers are missing. Replace covers and shields before you operate
the drive. Use the drive only as specified by the instructions.
Some figures in this section include drives without covers or safety shields to more clearly show the inside of the
drive. If covers or safety shields are missing from the drive, it can cause serious injury or death.
Always ground the motor-side grounding terminal.
If you do not ground the equipment correctly, it can cause serious injury or death if you touch the motor case.
After the drive blows a fuse or trips a GFCI, do not immediately energize the drive or operate
peripheral devices. Wait for the time specified on the warning label at a minimum and make sure
that all indicators are OFF. Then check the wiring and peripheral device ratings to find the cause of
the problem. If you do not know the cause of the problem, contact Yaskawa before you energize the
drive or peripheral devices.
If you do not fix the problem before you operate the drive or peripheral devices, it can cause serious injury or death.
Only let approved personnel install, wire, maintain, examine, replace parts, and repair the drive.
If personnel are not approved, it can cause serious injury or death.
Do not wear loose clothing or jewelry when you do work on the drive. Tighten loose clothing and
remove all metal objects, for example watches or rings.
Loose clothing can catch on the drive and jewelry can conduct electricity and cause serious injury or death.
Do not remove covers or touch circuit boards while the drive is energized.
If you touch the internal components of an energized drive, it can cause serious injury or death.
Do not modify the drive body or drive circuitry.
Modifications to drive body and circuitry can cause serious injury or death, will cause damage to the drive, and will
void the warranty. Yaskawa is not responsible for modifications of the product made by the user.
Fire Hazard
Tighten all terminal screws to the correct tightening torque.
Connections that are too loose or too tight can cause incorrect operation and damage to the drive. Incorrect
connections can also cause death or serious injury from fire.
Tighten screws at an angle in the specified range shown in this manual.
If you tighten the screws at an angle not in the specified range, you can have loose connections that can cause
damage to the terminal block or start a fire and cause serious injury or death.
Damage to Equipment
Do not apply incorrect voltage to the main circuit of the drive. Operate the drive in the specified
range of the input voltage on the drive nameplate.
Voltages that are higher than the permitted nameplate tolerance can cause damage to the drive.
Do not put flammable or combustible materials on top of the drive and do not install the drive near
flammable or combustible materials. Attach the drive to metal or other noncombustible material.
Flammable and combustible materials can start a fire and cause serious injury or death.
Crush Hazard
Wear eye protection when you do work on the drive.
If you do not use correct safety equipment, it can cause serious injury or death.
Use a crane or hoist to move large drives when necessary.
If you try to move a large drive without a crane or hoist, it can cause serious injury or death.
NOTICE
Damage to Equipment
When you touch the drive and circuit boards, make sure that you observe correct electrostatic
discharge (ESD) procedures.
If you do not follow procedures, it can cause ESD damage to the drive circuitry.
Do not break the electrical connection between the drive and the motor when the drive is
outputting voltage.
Incorrect equipment sequencing can cause damage to the drive.
Make sure that all connections are correct after you install the drive and connect peripheral
devices.
Incorrect connections can cause damage to the drive.
Note:
Do not use unshielded wire for control wiring. Use shielded, twisted-pair wires and ground the shield to the ground terminal of the drive.
Unshielded wire can cause electrical interference and unsatisfactory system performance.
2.2 Types of Faults, Minor Faults, Alarms, and Errors
2.2Types of Faults, Minor Faults, Alarms, and Errors
If the drive or motor do not operate correctly, check the drive keypad for a code or message.
If problems occur that are not identified in this manual, contact the nearest Yaskawa representative with this
information:
• Drive model
• Drive software version
• Date of purchase
• Description of the problem (for example failure conditions and modified parameters)
Table 2.1 contains descriptions of the different types of faults, minor faults, alarms, and errors that can occur during
drive operation.
Contact Yaskawa if there is damage to the drive. Contact information is on the back cover of the manual.
Table 2.1 Types of Faults, Minor Faults, Alarms, and Errors
TypeDrive Response
When the drive detects a fault, it will cause these conditions:
• The keypad shows the fault code, and ALM/ERR stays illuminated.
Fault
Minor Faults/Alarms
Operation Errors
Auto-Tuning Error
Copy Function Error
• The drive shuts off output, and the motor coasts to a stop. Some faults let the user select a motor stopping method.
• The terminal set to H2-01 to H2-03 = E [MFDO Function Selection = Fault] will activate.
The drive will not operate until you clear the fault with a Fault Reset and the drive goes back to usual status.
When the drive detects a minor fault or an alarm, it will cause these conditions:
• The keypad shows the alarm code, and ALM/ERR flashes.
• The drive will continue to operate the motor. Some alarms let you select a motor stopping method.
• If the drive detects a minor fault, the terminal set to H2-01 to H2-03 = 10 [Alarm] will activate If you do not set parameters
H2-01 to H2-03, the drive will not trigger MFDO terminals if it detects a minor fault.
• The drive will not output a minor fault signal if it detects an alarm.
It is not necessary to do Fault Reset.
An error occurs when parameter settings do not agree or a parameter combination is incorrect. The drive will not operate until
you set the parameters correctly.
When the drive detects an operation error, these conditions will result:
• The keypad shows the error code.
• Multi-function outputs do not output an alarm signal.
Find the parameters that caused the error and correct the settings.
An error occurs during Auto-Tuning.
When the drive detects an operation error, it will cause these conditions:
• The keypad shows the error code.
• Multi-function outputs do not output an alarm signal.
• The motor coasts to stop.
Remove the cause of the error and do Auto-Tuning again.
An error occurs when you use the keypad for a backup, restore, or verify operation.
When the drive detects a copy function error, it will cause these conditions:
• The keypad shows the error code.
• Multi-function outputs do not output an alarm signal.
Push a key on the keypad to clear the error. Remove the cause of the error and try the backup, restore, or verify operation again.
2.3 List of Fault, Minor Fault, Alarm, and Error Codes
2.3List of Fault, Minor Fault, Alarm, and Error Codes
Table 2.2 shows the possible fault, minor fault, alarm, and error codes.
The display codes are in alphabetical order. Search the table for the code shown on the keypad, and identify its causes
and possible solutions.
Note:
The number in parentheses adjacent to the code in the table identifies the fault code or minor fault code (hex. number) that was read during
MEMOBUS/Modbus communications.
Example: AEr (0032)
Table 2.2 List of Fault, Minor Fault, Alarm, and Error Codes
This section gives information about some of the causes and possible solutions of faults. You must use the Fault Reset
operation to remove the fault before you can operate the drive. Use the information in this table to remove the cause
of the fault.
CodeNameCausesPossible Solutions
bATKeypad Battery Low Voltage
Note:
Use o4-24 [bAT Detection Selection] to enable/disable bAT detection.
CodeNameCausesPossible Solutions
bCEBluetooth Communication Fault
Note:
• The drive detects this error when you use the Bluetooth LCD keypad and operate the drive with a smartphone or tablet.
• Do a Fault Reset to clear the fault.
• Set the stopping method for this fault in o2-27 [bCE Detection Selection].
CodeNameCausesPossible Solutions
boLBrakingTransistor Overload Fault
Note:
Do a Fault Reset to clear the fault.
CodeNameCausesPossible Solutions
bUSOption Communication Error
Note:
• The drive detects this error if the Run command or frequency reference is assigned to the option card.
• Do a Fault Reset to clear the fault.
• If the drive detects this error, the drive will operate the motor as specified by the stopping method set in F6-01 [Communication Error Selection].
CodeNameCausesPossible Solutions
CEModbus Communication Error
The keypad battery voltage is low.Replace the keypad battery.
The smartphone or tablet with DriveWizard Mobile
installed is too far from the keypad.
Radio waves from a different device are causing
interference with communications between the
smartphone or tablet and keypad.
The duty cycle of the braking transistor is high (the
regeneration power or repetition frequency is high).
You enabled the protective function for the braking
transistor when you have a regenerative converter.
The braking transistor in the drive is broken.Replace the drive.
The drive did not receive a signal from the controller.
The communications cable wiring is incorrect.
There is a short-circuit in the communications cable
or the communications cable is not connected.
Electrical interference caused a communication data
error.
The option is incorrectly installed to the drive.Correctly install the option to the drive.
The option is damaged.If the fault continues and the wiring is correct, replace the option.
The communications cable wiring is incorrect.Correct wiring errors.
There is a short circuit in the communications cable
or the communications cable is not connected.
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.
Make sure that no device around the keypad uses the same radio
bandwidth (2400 MHz to 2480 MHz), and prevent radio
interference.
• Install a regenerative converter.
• Increase the deceleration time.
Set L8-55 = 0 [Internal DB TransistorProtection Selection =
Disable].
Correct wiring errors.
• Repair short circuits and connect cables.
• Replace the defective communications cable.
• 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.
Electrical interference caused a communication data
error.
Note:
• The drive detects this error if it does not correctly receive control data for the CE detection time set to H5-09 [CE Detection Time].
• Do a Fault Reset to clear the fault.
• If the drive detects this error, the drive will operate the motor as specified by the stopping method set in H5-04 [Communication Error Stop Method].
CodeNameCausesPossible Solutions
CFControl Fault
Note:
• The drive detects this error if the torque reference is more than the torque limit for 3 seconds or longer while the drive ramps to stop.
• Do a Fault Reset to clear the fault.
CodeNameCausesPossible Solutions
CoFCurrent Offset Fault
Note:
• The drive detects this error if the current offset value is more than the permitted setting range while the drive automatically adjusts the current offset.
• Do a Fault Reset to clear the fault.
CodeNameCausesPossible Solutions
CP1Comparator 1 Limit Error
Note:
• The drive detects this error when H2-01 to H2-03 = 66 [MFDO Function Selection = Comparator1].
• Do a Fault Reset to clear the fault.
• Set the stopping method for this fault in H2-33 [Comparator1 Protection Selection].
CodeNameCausesPossible Solutions
CP2Comparator 2 Limit Error
Note:
• The drive detects this error when H2-01 to H2-03 = 67 [MFDO Function Selection = Comparator2].
• Do a Fault Reset to clear the fault.
• Set the stopping method for this fault in H2-35 [Comparator2 Protection Selection].
Motor parameters are set incorrectlyCorrectly set the motor parameters and do Auto-Tuning again.
The torque limit setting is too low.Adjust L7-01 to L7-04 [Torque Limit].
The load inertia is too large.• Adjust C1-02, C1-04, C1-06, and C1-08 [Deceleration Times].
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.
The motor and drive are connected incorrectly.Correct wiring errors.
Line-to-line Resistance Tuning is not done.Do Stationary Auto-Tuning for Line-to-Line Resistance.
The drive received a Run command while the motor
was coasting.
The drive starts operation while the induced voltage
stays in the motor (during coasting to a stop or after
fast deceleration).
A drive hardware problem occurred.Replace the drive.
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].
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].
• 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.
• Set the frequency reference to the minimum output frequency,
and stop the Run command when the drive stops deceleration.
Correctly set b1-03 [Stopping Method Selection].
• Examine the sequence and input the Run command after the
motor fully stops.
• Set b3-01 = 1 [Speed Search at Start Selection = Enabled].
• 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.
Examine the monitor value and remove the cause of the fault.
Examine the monitor value and remove the cause of the fault.
• The drive detects this error if there is an error in the data written to the EEPROM of the drive.
• Do a Fault Reset to clear the fault.
• Fault trace is not available for this fault.
CodeNameCausesPossible Solutions
CPF25Terminal Board not Connected
Note:
Do a Fault Reset to clear the fault.
CodeNameCausesPossible Solutions
dCE1Communication Error1
Note:
• Do a Fault Reset to clear the fault.
• Fault trace is not available for these faults.
CodeNameCausesPossible Solutions
dCE2Communication Error2
Note:
• Do a Fault Reset to clear the fault.
• Fault trace is not available for these faults.
CodeNameCausesPossible Solutions
dEvSpeed Deviation
Note:
• The drive detects this error if the difference between the detected speed and the speed reference is more than the setting of F1-10 for longer than F1-11.
• Do a Fault Reset to clear the fault.
• If the drive detects this error, the drive will operate the motor as specified by the stopping method set in F1-04 [Speed Deviation Detection Select].
CodeNameCausesPossible Solutions
dv7Polarity Judge Timeout
Note:
• The drive detects this error if it cannot detect polarity in a pre-set length of time.
• Do a Fault Reset to clear the fault.
Control Circuit Error
A drive hardware problem occurred.• Re-energize the drive.
The drive power supply was de-energized while a
communication option card entered a parameter Write
command.
An EEPROM peripheral circuit error occurred.• Re-energize the drive.
The terminal board is not correctly connected to the
drive.
A drive hardware problem occurred temporarily due
to noise.
A drive hardware problem occurred temporarily due
to noise.
The load is too heavy.Decrease the load.
Acceleration and deceleration times are set too short.Increase the values set in C1-01 to C1-08 [Acceleration/
The dEv detection level settings are incorrect.Adjust F1-10 [Speed Deviation Detection Level] and F1-11 [Speed
The load is locked up.Examine the machine.
The holding brake is stopping the motor.Release the holding brake.
There is a disconnection in the motor coil winding.Measure the motor line-to-line resistance and replace the motor if a
The screws on the drive output terminals are loose.Tighten the terminal screws to the correct tightening torque.
• 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.
Set A1-03 = 2220, 3330 [Initialize Parameters = 2-WireInitialization, 3-Wire Initialization] and initialize 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.
1. De-energize the drive.
2. Correctly connect the terminal board to the drive.
3. Re-energize the drive.
• Remove the cause of the noise.
• If the fault stays, replace the control board or the drive.
• Remove the cause of the noise.
• If the fault stays, replace the control board or the drive.
• The drive detects this error if there is an error in the DriveWorksEZ program that was saved to EEPROM.
• Do a Fault Reset to clear the fault.
CodeNameCausesPossible Solutions
dWF2DriveWorksEZ Fault 2
Note:
Do a Fault Reset to clear the fault.
CodeNameCausesPossible Solutions
dWF3DriveWorksEZ Fault 3
Note:
Do a Fault Reset to clear the fault.
CodeNameCausesPossible Solutions
dWFLDriveWorksEZ Fault
Note:
Do a Fault Reset to clear the fault.
CodeNameCausesPossible Solutions
E5
Note:
• Do a Fault Reset to clear the fault.
• If the drive detects this fault, it will operate the motor as specified by the stop method set in F6-25 [MECHATROLINK Watchdog Error Sel].
CodeNameCausesPossible Solutions
EF0Option Card External Fault
Note:
• The drive detects this fault if the alarm function on the external device side is operating.
• Do a Fault Reset to clear the fault.
• If the drive detects this fault, it will operate the motor as specified by the stop method set in F6-03 [Comm External Fault (EF0) Select].
CodeNameCausesPossible Solutions
EF1External Fault (Terminal S1)
Note:
Do a Fault Reset to clear the fault.
CodeNameCausesPossible Solutions
EF2External Fault (Terminal S2)
EEPROM Memory DWEZ Data
Error
MECHATROLINK Watchdog Timer
Err
There is an error in the EEPROM peripheral circuit.• Re-energize the drive.
There is a problem with the EEPROM data.Set A1-03 = 2220, 3330 [Initialize Parameters = 2-Wire
There was a fault in the DriveWorksEZ program.Examine the DriveWorksEZ program and remove the cause of the
There was a fault in the DriveWorksEZ program.Examine the DriveWorksEZ program and remove the cause of the
There was a fault in the DriveWorksEZ program.Examine the DriveWorksEZ program and remove the cause of the
The drive detected a watchdog circuit exception while
it received data from the controller.
The communication option received an external fault
from the controller.
A programming error occurred on the controller side. Examine the operation of the controller program.
MFDI terminal S1 caused an external fault through an
external device.
The wiring is incorrect.Correctly connect the signal line to MFDI terminal S1.
External Fault [H1-01 = 20 to 2B] is set to MFDI
terminal S1, but the terminal is not in use.
MFDI terminal S2 caused an external fault through an
external device.
The wiring is incorrect.Correctly connect the signal line to MFDI terminal S2.
• 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.
Initialization, 3-Wire Initialization] to initialize the drive, then
upload the DriveWorksEZ project to the drive again.
fault. This is not a drive fault.
fault. This is not a drive fault.
fault. This is not a drive fault.
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:
• The drive detects this fault if there is not balance between the three phases of the output current from the PM motor.
• Do a Fault Reset to clear the fault.
CodeNameCausesPossible Solutions
LSoLow Speed Motor Step-Out
Note:
• The drive detects this fault if it detects step-out while running at low speed.
• Do a Fault Reset to clear the fault.
• LSo is a protective function that stops the motor and stops the reverse run if a motor without a motor code incorrectly detects the initial polarity. To quickly detect motor reversal,
decrease the values set in L8-93 to L8-95 to a range in which the drive does not malfunction.
CodeNameCausesPossible Solutions
nSENode Setup Error
Note:
Do a Fault Reset to clear the fault.
CodeNameCausesPossible Solutions
oCOvercurrent
Phase loss occurred in the wiring on the output side
of the drive.
The output terminal screws of the drive are loose.Tighten the terminal screws to the correct tightening torque.
There is not balance between the three phases of the
PM motor impedance.
The drive output circuit is broken.• Re-energize the drive.
The motor code set incorrectly.• Set E5-01 [PM Motor Code Selection] correctly as specified by
The load is too large.• Decrease the load.
An external force on the load side caused the motor to
move at start.
The drive incorrectly detected the motor magnetic
pole position.
The setting of n8-84 [Polarity Detection Current] is
too low.
The acceleration time is too short.• Calculate the torque necessary during acceleration related to the
The drive is trying to operate a specialized motor or a
motor that is larger than the maximum applicable
motor output of the drive.
A magnetic contactor was switched at the output.Set the operation sequence to not turn ON or OFF the magnetic
The V/f pattern settings are incorrect.• Examine the ratios between the V/f pattern frequency and
The torque compensation gain is too large.Decrease the value set in C4-01 [Torque Compensation Gain] to
Electrical interference caused a problem.Examine the control circuit lines, main circuit lines, and ground
The gain during overexcitation operation is too large. • Find the time when the fault occurs.
The drive received a Run command while the motor
was coasting.
In PM Control Methods, the setting of the motor code
is incorrect.
If the drive detects the fault at start or in the low
speed range (10% or less) and n8-57 = 1 [HFIOverlap Selection = Enabled] for PM Control
methods, the high frequency injection gain is too
high.
The control method is set incorrectly for the motor.Set A1-02 [Control Method Selection] correctly.
The motor main circuit cable is too long.• Replace the drive with a larger capacity model.
Speed search does not complete at start when you set
A1-02 = 8 [EZ Vector Control] and use an induction
motor.
An overcurrent occurred during overexcitation
deceleration.
Note:
• This fault occurs if the drive sensors detect a drive output current more than the specified overcurrent detection level.
• Do a Fault Reset to clear the fault.
CodeNameCausesPossible Solutions
oC2Overcurrent2
Note:
• This fault occurs if the drive sensors detect a drive output current more than the specified overcurrent detection level.
• Do a Fault Reset to clear the fault.
CodeNameCausesPossible Solutions
oFA00Option Not Compatible with Port
Note:
• Do a Fault Reset to clear the fault.
• Fault trace is not available for these faults.
When A1-02 = 5, 6, 8 [Control Method Selection =
OLV/PM, AOLV/PM, or EZOLV], the output currentis more than the value set in L8-27 [Overcurrent
Detection Gain].
The option connected to connector CN5 is not
compatible.
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.
• 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.
contactor while the drive is outputting voltage.
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.
make sure that the motor does not stall.
wiring, and decrease the effects of electrical interference.
• If the fault occurs at the same time as an overexcitation
operation, decrease n3-13 [OverexcitationBraking (OEB) Gain]
and consider the motor flux saturation.
• 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.
• 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.
• 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 an ordinary IPM motor.
• Decrease C6-02 [Carrier Frequency]. Or set C6-02 = B.
When E9-01 = 0 [Motor Type Selection = Induction (IM)], set b3-
• The drive detects this fault if the heatsink temperature of the drive is more than the value set in L8-02.
• Do a Fault Reset to clear the fault.
• If the drive detects this fault, it will operate the motor as specified by the Stopping Method set in L8-03 [Overheat Pre-Alarm Selection].
CodeNameCausesPossible Solutions
oH1Heatsink Overheat
Note:
• The drive detects this fault if the heatsink temperature of the drive is more than the oH1 detection level. o2-04 [Drive Model (KVA) Selection] determines the oH1 detection level.
• Do a Fault Reset to clear the fault.
• L5-08 [Fault Reset Enable Select Grp2] disables the Auto Restart function.
Option Card Error Occurred at
Option Port (CN5)
Option Card Error Occurred at
Option Port (CN5)
Option Card Connection Error (CN5)
Communication Option Card
Connection Error (CN5)
You changed the option card connected to connector
CN5 during operation.
A fault occurred in the option card.1. De-energize the drive.
A fault occurred in the option card.1. De-energize the drive.
A fault occurred in the option card.1. De-energize the drive.
A fault occurred in the option card.1. De-energize the drive.
The ambient temperature is high and the heatsink
temperature of the drive is more than the value set in
L8-02 [Overheat Alarm Level].
The load is too heavy.• Measure the output current.
The internal cooling fan of the drive stopped.1. Use the procedures in this manual to replace the cooling fan.
The ambient temperature is high and the heatsink
temperature of the drive is more than the oH1
detection level.
The load is too heavy.• Measure the output current.
1. De-energize the drive.
2. Refer to the option card manual and correctly connect the
option card to the connector on the drive.
2. Make sure that the option card is correctly connected to the
connector.
3. If the problem continues, replace the option card.
2. Make sure that the option card is correctly connected to the
connector.
3. If the problem continues, replace the option card.
2. Make sure that the option card is correctly connected to the
connector.
3. If the problem continues, replace the option card.
2. Make sure that the option card is correctly connected to the
connector.
3. If the problem continues, replace the option card.
• 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.
• Decrease the load.
• Decrease the value set in C6-02 [Carrier Frequency Selection].
2. Set o4-03 = 0 [Fan Operation Time Setting = 0 h].
• 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.
• Decrease the load.
• Decrease the value set in C6-02 [Carrier Frequency Selection].
• When H3-02 or H3-10 = E [MFAI Function Select = Motor Temperature (PTC Input)], the drive detects this fault if the motor overheat signal input from analog input terminal A1
or A2 is more than the alarm detection level.
• Do a Fault Reset to clear the fault.
• If the drive detects this fault, it will operate the motor as specified by the Stopping Method set in L1-03 [Motor Thermistor oH Alarm Select].
CodeNameCausesPossible Solutions
oH4Motor Overheat Fault (PTC Input)
Note:
• The drive detects this fault if the motor overheat signal in analog input terminals A1, or A2 is more than the Fault detection level. (If H3-02, H3-10= E [Terminal A1/A2 Function
Select = Motor Temperature (PTC Input)].)
• Do a Fault Reset to clear the fault.
CodeNameCausesPossible Solutions
oL1Motor Overload
The thermistor wiring that detects motor temperature
is defective.
A fault occurred on the machine.
Example: The machine is locked.
The motor has overheated.• Check the load level, acceleration/deceleration time, and motor
The motor has overheated.• Check the load level, acceleration/deceleration time, and motor
The load is too large.Decrease the load.
The acceleration/deceleration times or cycle times are
too short.
Overload occurred while running at low speed.• Decrease the load when running at low speed.
L1-01 [Motor Overload (oL1) Protection] is set
incorrectly.
The V/f pattern does not fit the motor qualities.• Examine the ratios between the V/f pattern frequency and
Correct wiring errors.
Examine the machine and remove the cause of the fault
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 [MidPoint 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.
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 [MidPoint 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.
Note:
Reset oL1 when U4-16 [Motor oL1 Level] < 100.
• 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].
• 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.
Set L1-01 in as specified by the motor qualities for a drive-dedicated
motor.
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 [MidPoint 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.
If the drive detects the fault at start or in the low
speed range (10% or less) and n8-57 = 1 [HFIOverlap Selection = Enabled] for PM Control
methods, the high frequency injection gain is too
high.
Note:
• The drive detects this fault if the motor speed is more than the value set in F1-08 for longer than F1-09.
• Do a Fault Reset to clear the fault.
• If the drive detects this fault, it will operate the motor as specified by the Stopping Method set in F1-03 [Overspeed Detection Selection].
CodeNameCausesPossible Solutions
ovOvervoltage
Note:
• The drive detects this error if the DC bus voltage is more than the ov detection level while the drive is running.
• Do a Fault Reset to clear the fault.
• The ov detection level is approximately 410 V with 200 V class drives. The detection level is approximately 820 V for 400 V class drives.
• L5-08 [Fault Reset Enable Select Grp2] disables the Auto Restart function.
The deceleration time is too short and too much
regenerative energy is flowing back into the drive.
The acceleration time is too short.• Make sure that sudden drive acceleration does not cause the
The braking load is too large.Connect a dynamic braking option to the drive.
There are surge voltages in the input power supply.Connect a DC link choke to the drive.
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).
The speed search-related parameters are set
incorrectly (this fault also occurs during recovery
from momentary power loss and after Auto Restarts).
The power supply voltage is too high.Decrease the power supply voltage to match the drive rated voltage.
The braking resistor or braking resistor unit wiring is
incorrect.
Electrical interference caused a drive malfunction.• Examine the control circuit lines, main circuit lines, and ground
The load inertia is set incorrectly.• Examine the load inertia settings with KEB, overvoltage
The Short Circuit Braking function used in OLV/PM
control method.
There is motor hunting.• Adjust n1-02 [Hunting Prevention Gain Setting].
Speed search does not complete at start when you set
A1-02 = 8 [EZOLV] and use an induction motor.
• 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.
• Increase the values set in C1-02, C1-04, C1-06, or C1-08
[Deceleration Times].
• Connect a dynamic braking option to the drive.
• Perform Deceleration Rate Tuning.
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].
Note:
If you turn the phase advancing capacitors ON and OFF and use
thyristor converters in the same power supply system, there can
be surge voltages that irregularly increase the input voltage.
1. Examine the motor main circuit cable, terminals, and motor
terminal box, and then remove ground faults.
2. Re-energize the drive.
• Examine the settings for all speed search related parameters.
• The drive detects this error if the DC bus voltage changes irregularly without regeneration.
• Do a Fault Reset to clear the fault.
• Use L8-05 to enable and disable PF detection.
CodeNameCausesPossible Solutions
PGoEncoder (PG) Feedback Loss
Note:
• Do a Fault Reset to clear the fault.
• If the drive detects this error, it will operate the motor as specified by the Stopping Method set in F1-02 [PG Open Circuit Detection Select].
CodeNameCausesPossible Solutions
rFBraking Resistor Fault
Note:
Do a Fault Reset to clear the fault.
CodeNameCausesPossible Solutions
rHBraking Resistor Overheat
Note:
• The drive detects this error if the braking resistor overheat protective function is active.
• The magnitude of the braking load causes the braking resistor overheat alarm, NOT the surface temperature. If the duty cycle is higher than the braking resistor rating, the drive
will show the alarm.
• Do a Fault Reset to clear the fault.
• Parameter L8-01 enables and disables rH detection.
The communication option detected a fault.Refer to the manual for the communication option card.
There is a phase loss in the drive input power.Correct errors with the wiring for main circuit drive input power.
There is loose wiring in the drive input power
terminals.
The drive input power voltage is changing too much.• Examine the input power for problems.
There is unsatisfactory balance between voltage
phases.
The main circuit capacitors have become
unserviceable.
The holding brake is stopping the motor.Release the holding brake.
The resistance of the dynamic braking option
connected to the drive is too low.
A regenerative converter or regenerative unit is
connected to the drive.
The deceleration time is too short and excessive
regenerative energy is flowing back into the drive.
The duty cycle is too high.Examine the duty cycle.
The braking load is too heavy.• Calculate the braking load and braking power again, and
The braking resistor is not sufficient.Use the braking resistor specifications to select a sufficient braking
Tighten the terminal screws to the correct tightening torque.
• Make the drive input power stable.
• If the input power supply is good, examine the magnetic
contactor on the main circuit side for problems.
• Examine the input power for problems.
• Make the drive input power stable.
• Set L8-05 = 0 [Input Phase Loss Protection Sel = Disabled].
• Examine the capacitor maintenance time in monitor U4-05
[CapacitorMaintenance]. If U4-05 is more than 90%, replace the
control board or the drive. For information about replacing the
control board, contact Yaskawa or your nearest sales
representative.
• If drive input power is correct and the fault stays, replace the
control board or the drive. For information about replacing the
control board, contact Yaskawa or your nearest sales
representative.
Use a dynamic braking option that fits the model and duty rating of
the drive.
Set L8-55 = 0 [Internal DB TransistorProtection = Disable].
• 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.
Note:
When L8-01 = 1 [3% ERF DB Resistor Protection = Enabled],
the maximum braking duty cycle is 3%.
decrease the braking load.
• Use a braking resistor that improves braking power.
• The drive detects this error if there is a short circuit or ground fault on the drive output side, or an IGBT failure.
• Do a Fault Reset to clear the fault.
CodeNameCausesPossible Solutions
SCFSafety Circuit Fault
Note:
Do a Fault Reset to clear the fault.
CodeNameCausesPossible Solutions
SErSpeed Search Retries Exceeded
Note:
• The drive detects this error if the number of speed search restarts is more than the value set in b3-19 [Speed Search Restart Attempts].
• Do a Fault Reset to clear the fault.
CodeNameCausesPossible Solutions
STPoMotor Step-Out Detected
Note:
Do a Fault Reset to clear the fault.
The drive control circuit is damaged.
There is a malfunction in the internal braking
transistor of the drive.
Overheating caused damage to the motor or the motor
insulation is not satisfactory.
The motor main circuit cable is contacting ground to
make a short circuit.
A short circuit or ground fault on the drive output
side caused damage to the output transistor of the
drive.
When A1-02 = 5, 6 [Control Method Selection =OLV/PM or AOLV/PM], the output current is more
than the value set in L8-27 [Overcurrent DetectionGain].
The safety circuit is broken.Replace the control board or the drive. For information about
The speed search-related parameters are set
incorrectly.
The motor is coasting in the opposite direction of the
Run command.
The motor code is set incorrectly for PM Control
Methods.
The load is too large.• Increase the value set in n8-55 [Motor to Load Inertia Ratio].
The load inertia is too large.Increase the value set in n8-55.
The acceleration/deceleration times are too short.• Increase the values set in C1-01 to C1-08 [Acceleration/
Speed response is too slow.Increase the value set in n8-55.
• 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.
Measure the motor insulation resistance, and replace the motor if
there is electrical conduction or unserviceable insulation.
• 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.
• 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, contact Yaskawa or your nearest sales
representative.
Set L8-27 correctly.
replacing the control board, contact Yaskawa or your nearest sales
representative.
• Decrease the value set in b3-10 [Speed Estimation Detection
Gain].
• Increase the value set in b3-17 [Speed Est Retry Current Level].
• Increase the value set in b3-18 [Speed Est Retry Detection Time].
• Do Auto-Tuning again.
Set b3-14 = 1 [Bi-directional Speed Search = Enabled].
• 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.
• 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.
Deceleration Times].
• Increase the value set in C2-01 [S-Curve Time @ Start of Accel].
• Parameter o4-24 [bAT Detection Selection] enables and disables TiM detection.
CodeNameCausesPossible Solutions
UL3Undertorque Detection 1
Note:
• The drive detects this error if the drive output current is less than the level set in L6-02 for longer than L6-03.
• Do a Fault Reset to clear the fault.
• If the drive detects this error, it will operate the motor as specified by the Stopping Method set in L6-01 [Torque Detection Selection 1].
CodeNameCausesPossible Solutions
UL4Undertorque Detection 2
Note:
• The drive detects this error if the drive output current is less than the level set in L6-05 for longer than L6-06.
• Do a Fault Reset to clear the fault.
• If the drive detects this error, it will operate the motor as specified by the Stopping Method set in L6-04 [Torque Detection Selection 2].
CodeNameCausesPossible Solutions
UL5Mechanical Weakening Detection 2
Note:
• Do a Fault Reset to clear the fault.
• If the drive detects this error, it will operate the motor as specified by the Stopping Method set in L6-08.
CodeNameCausesPossible Solutions
Uv1DC Bus Undervoltage
Note:
• The drive detects this error if the DC bus voltage decreases below the level set in L2-05 [Undervoltage Detection Lvl (Uv1)] while the drive is running.
• The Uv1 detection level is approximately 190 V for a 200 V class drives. The detection level is approximately 380 V for 400 V class drives. The detection level is approximately
350 V when E1-01 [Input AC Supply Voltage] < 400.
• Do a Fault Reset to clear the fault.
• Fault trace is not available for this fault.
• L5-08 [Fault Reset Enable Select Grp2] disables the Auto Restart function.
There is a battery in the keypad, but the date and time
are not set.
A fault occurred on the machine.
Example: There is a broken pulley belt.
The parameters are incorrect for the load.Adjust L6-02 [Torque Detection Level 1] and L6-03 [Torque
A fault occurred on the machine.
Example: There is a broken pulley belt.
The parameters are incorrect for the load.Adjust L6-05 [Torque Detection Level 2] and L6-06 [Torque
The drive detected undertorque as specified by the
conditions for mechanical weakening detection set in
L6-08 [Mechanical Fatigue Detect Select].
There is a phase loss in the drive input power.Correct errors with the wiring for main circuit drive input power.
There is loose wiring in the drive input power
terminals.
The drive input power voltage is changing too much.• Examine the input power for problems.
There was a loss of power.Use a better power supply.
The main circuit capacitors have become
unserviceable.
The relay or contactor on the soft-charge bypass relay
is damaged.
Use the keypad to set the date and time.
Examine the machine and remove the cause of the fault.
Detection Time 1] settings.
Examine the machine and remove the cause of the fault.
Detection Time 2] settings.
Examine the machine for deterioration.
Tighten the terminal screws to the correct tightening torque.
• Make the drive input power stable.
• If the input power supply is good, examine the magnetic
contactor on the main circuit side for problems.
Examine the capacitor maintenance time in monitor U4-05[CapacitorMaintenance]. If U4-05 is more than 90%, replace the
control board or the drive. For information about replacing the
control board, contact Yaskawa or your nearest sales representative.
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. For information about replacing the board,
contact Yaskawa or your nearest sales representative.
• The drive detects this error if the control power supply voltage decreases.
• Do a Fault Reset to clear the fault.
• Fault trace is not available for this fault.
CodeNameCausesPossible Solutions
Uv3Soft Charge Answerback Fault
Note:
• Do a Fault Reset to clear the fault.
• Fault trace is not available for these faults.
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.
There was a problem with the drive hardware.• Re-energize the drive.
The relay or contactor on the soft-charge bypass relay
is damaged.
Connect the momentary power loss recovery unit to 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.
• Re-energize the drive.
• If the fault stays, replace the control board or the drive.
• Check 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. For information
about replacing the control board, contact Yaskawa or your
nearest sales representative.
This section gives information about the causes and possible solutions when a minor fault or alarm occurs. Use the
information in this table to remove the cause of the minor fault or alarm.
CodeNameCausesPossible Solutions
AErStation Address Setting Error
Note:
If the drive detects this error, the terminal set to H2-01 to H2-03 = 10 [MFDO Function Selection = Alarm] will activate.
CodeNameCausesPossible Solutions
bATKeypad Battery Low Voltage
Note:
• If the drive detects this error, the terminal set to H2-01 to H2-03 = 10 [MFDO Function Selection = Alarm] will activate.
• Parameter o4-24 [bAT Detection Selection] enables and disables bAT detection.
CodeNameCausesPossible Solutions
bbBaseblock
Note:
The drive will not output a minor fault signal for this alarm.
CodeNameCausesPossible Solutions
bCEBluetooth Communication Error
Note:
• The drive detects this error when you operate the drive with a smartphone or tablet with a Bluetooth LCD Keypad.
• If the drive detects this error, the terminal assigned to H2-01 to H2-03 = 10 [MFDO Function Select = Alarm] will activate.
The communications cable wiring is incorrect.Correct wiring errors.
There is a short-circuit in the communications cable
or the communications cable is not connected.
A programming error occurred on the controller side. Examine communications at start-up and correct programming
The communications circuitry is damaged.• Do a self-diagnostics check.
The termination resistor setting for MEMOBUS/
Modbus communications is incorrect.
The communications cable wiring is incorrect.Correct wiring errors.
There is a short-circuit in the communications cable
or the communications cable is not connected.
Electrical interference caused a communication data
error.
The communication protocol is not compatible.• Examine the values set in H5-xx.
The value set in H5-09 [CE Detection Time] is too
small for the communications cycle.
The controller software or hardware is causing a
communication problem.
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].
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].
card.
• Repair the short-circuited or disconnected portion of the cable.
• Replace the defective communications cable.
errors.
• If the problem continues, replace the control board or the drive.
For information about replacing the control board, contact
Yaskawa or your nearest sales representative.
On the last drive in a MEMOBUS/Modbus network, set DIP switch
S2 to the ON position to enable the termination resistor.
• Repair short circuits and connect cables.
• Replace the defective communications cable.
• 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.
• Examine the settings on the controller side and correct the
difference in communication conditions.
• Change the controller software settings.
• Increase the value set in H5-09.
Examine the controller and remove the cause of the problem.
Examine the monitor value and remove the cause of the fault.
Examine the monitor value and remove the cause of the fault.
If the drive detects this error, the terminal set to H2-01 to H2-03 = 10 [MFDO Function Selection = Alarm] will activate.
CodeNameCausesPossible Solutions
CyPoCycle Power to Accept Changes
CodeNameCausesPossible Solutions
dEvSpeed Deviation
Note:
• The drive detects this error if the difference between the detected speed and the speed reference is more than the setting of F1-10 for longer than F1-11.
• If the drive detects this error, the terminal set to H2-01 to H2-03 = 10 [MFDO Function Selection = Alarm] will activate.
• If the drive detects this error, it will operate the motor as specified by the stopping method set in F1-04 [Speed Deviation Detection Select].
CodeNameCausesPossible Solutions
dnEDrive Disabled
Note:
If the drive detects this error, the terminal set to H2-01 to H2-03 = 10 [MFDO Function Selection = Alarm] will activate.
CodeNameCausesPossible Solutions
dWA2DriveWorksEZ Alarm 2
Note:
If the drive detects this error, the terminal set to H2-01 to H2-03 = 10 [MFDO Function Selection = Alarm] will activate.
CodeNameCausesPossible Solutions
dWA3DriveWorksEZ Alarm 3
Note:
If the drive detects this error, the terminal set to H2-01 to H2-03 = 10 [MFDO Function Selection = Alarm] will activate.
CodeNameCausesPossible Solutions
dWALDriveWorksEZ Alarm
Note:
If the drive detects this error, the terminal set to H2-01 to H2-03 = 10 [MFDO Function Selection = Alarm] will activate.
CodeNameCausesPossible Solutions
E5
Note:
• If the drive detects this error, the terminal set to H2-01 to H2-03 = 10 [MFDO Function Selection = Alarm] will activate.
• If the drive detects this error, it will operate the motor as specified by the stopping method set in F6-25 [MECHATROLINK Watchdog Error Sel].
MECHATROLINK
CommCycleSettingErr
MECHATROLINK Watchdog Timer
Err
The drive received a fault reset command when a Run
command was active.
The communications cycle setting of the controller is
not in the permitted range of the MECHATROLINK
interface option.
Although F6-15 = 1 [Comm. Option ParametersReload = Reload Now], the drive does not update the
communication option parameters.
The load is too large.Decrease the load.
The acceleration/deceleration times are too short.Increase the values set in C1-01 to C1-08 [Acceleration/
The dEv detection level settings are incorrect.Adjust F1-10 [Speed Deviation Detection Level] and F1-11 [Speed
The load is locked up.Examine the machine.
The holding brake is stopping the motor.Release the holding brake.
A terminal set for H1-xx = 6A [Drive Enable] turned
OFF.
There was an error in the DriveWorksEZ program.Examine the DriveWorksEZ program and remove the cause of the
There was an error in the DriveWorksEZ program.Examine the DriveWorksEZ program and remove the cause of the
There was an error in the DriveWorksEZ program.Examine the DriveWorksEZ program and remove the cause of the
The drive detected a watchdog circuit exception while
it received data from the controller.
Turn off the Run command then de-energize and re-energize the
drive.
Set the communications cycle of the controller in the permitted
range of the MECHATROLINK interface option.
Re-energize the drive to update the communication option
parameters.
Deceleration Times].
Deviation Detect DelayTime].
Examine the operation sequence.
fault. This is not a drive fault.
fault. This is not a drive fault.
fault. This is not a drive fault.
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:
The current level temporarily increased because of
speed search after a momentary power loss or while
trying to Auto Restart.
Note:
• The drive detects this error if the drive output current is more than the overcurrent alarm level (150% of the rated current).
• If the drive detects this error, the terminal set to H2-01 to H2-03 = 10 [MFDO Function Selection = Alarm] will activate.
CodeNameCausesPossible Solutions
L24vLoss of External Power 24 Supply
Note:
• Set o2-23 [External 24V Powerloss Detection] to enable or disable L24v detection.
• The drive will not output an alarm signal for this alarm.
CodeNameCausesPossible Solutions
LoGLog Com Error
Note:
If the drive detects this error, the terminal assigned to H2-01 to H2-03 = 6A [MFDO Function Select = Data Logger Error] will be ON.
CodeNameCausesPossible Solutions
LT-1Cooling Fan Maintenance Time
Note:
When the estimated performance life is expired, the terminal assigned to H2-01 to H2-03 = 2F [MFDO Function Select = Maintenance Notification] will be ON.
CodeNameCausesPossible Solutions
LT-2Capacitor Maintenance Time
Note:
When the estimated performance life is expired, the terminal assigned to H2-01 to H2-03 = 2F [MFDO Function Select = Maintenance Notification] will be ON.
CodeNameCausesPossible Solutions
LT-3SoftChargeBypassRelay MainteTime
Note:
When the estimated performance life is expired, the terminal assigned to H2-01 to H2-03 = 2F [MFDO Function Select = Maintenance Notification] will be ON.
CodeNameCausesPossible Solutions
LT-4IGBT Maintenance Time (50%)
Note:
When the estimated performance life is expired, the terminal assigned to H2-01 to H2-03 = 2F [MFDO Function Select = Maintenance Notification] will be ON.
CodeNameCausesPossible Solutions
oHHeatsink Overheat
The voltage of the backup 24 V power supply has
decreased. The main circuit power supply is operating
correctly.
There is not a micro SD in the keypad.Put a micro SD card in the keypad.
• 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.
• A communication error between the keypad and
drive occurred during a log communication.
The cooling fan is at 90% of its expected performance
life.
The capacitors for the main circuit and control circuit
are at 90% of expected performance life.
The soft charge bypass relay is at 90% of its expected
performance life.
The IGBT is at 50% of its expected performance life. Check the load, carrier frequency, and output frequency.
The ambient temperature is high and the heatsink
temperature is more than the L8-02 [Overheat AlarmLevel].
There is not sufficient airflow around the drive.• Give the drive the correct installation space as shown in the
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.
• 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.
Set o5-01 = 0 [Log Start/Stop Selection = OFF].
1. Use the procedures in this manual to replace the cooling fan.
2. Set o4-03 = 0 [Fan Operation Time Setting = 0 h] to reset the
cooling fan operation time.
Replace the board or the drive. For information about replacing the
control board, contact Yaskawa or your nearest sales representative.
Replace the board or the drive. For information about replacing the
control board, contact Yaskawa or your nearest sales representative.
• Measure the ambient temperature.
• Increase the airflow around the drive.
• 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.
manual.
• Make sure that there is sufficient circulation around the control
panel.
• Examine the drive for dust or other unwanted materials that
could clog the cooling fan.
• Remove unwanted materials that prevent air circulation.
• The drive detects this error if the motor speed is more than the value set in F1-08 for longer than F1-09.
• If the drive detects this error, the terminal set to H2-01 to H2-03 = 10 [MFDO Function Selection = Alarm] will activate.
• If the drive detects this error, it will operate the motor as specified by the stopping method set in F1-03 [Overspeed Detection Selection].
CodeNameCausesPossible Solutions
ovOvervoltage
Note:
• The drive detects this error if the DC bus voltage is more than the ov detection level when the Run command has not been input (while the drive is stopped).
• The ov detection level is approximately 410 V with 200 V class drives. The detection level is approximately 820 V for 400 V class drives.
• If the drive detects this error, the terminal set to H2-01 to H2-03 = 10 [MFDO Function Selection = Alarm] will activate.
CodeNameCausesPossible Solutions
PASSModbus Communication Test
CodeNameCausesPossible Solutions
PFInput Phase Loss
Note:
• The drive detects this error if the DC bus voltage changes irregularly without regeneration.
• If the drive detects this error, the terminal assigned to H2-01 to H2-03 = 10 [MFDO Function Select = Alarm] will be ON.
• Use L8-05 [Input Phase Loss Protection Sel] to enable and disable PF detection.
CodeNameCausesPossible Solutions
PGoEncoder (PG) Feedback Loss
There is overshoot.• Decrease C5-01 [ASR Proportional Gain 1] and increase C5-02
There is an incorrect number of PG pulses set in the
drive.
The oS detection level is set incorrectly.Adjust F1-08 [Overspeed Detection Level] and F1-09 [Overspeed
There are surge voltages in the input power supply.Connect a DC link choke to the drive.
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).
The power supply voltage is too high.Decrease the power supply voltage to match the drive rated voltage.
Electrical interference caused a drive malfunction.• Examine the control circuit lines, main circuit lines, and ground
The MEMOBUS/Modbus communications test is
complete.
There is a phase loss in the drive input power.Correct all wiring errors with the main circuit power supply.
Loose wiring in the input power terminals.Tighten the screws to the correct tightening torque.
The drive input power voltage is changing too much.• Examine the supply voltage for problems.
Unsatisfactory balance between voltage phases.• Examine the supply voltage for problems.
The main circuit capacitors have become
unserviceable.
The encoder cable is disconnected or wired
incorrectly.
The encoder is not receiving power.Examine the encoder power supply.
[ASR Integral Time 1].
• Adjust the pulse train gain with H6-02 to H6-05 [Pulse Train
Input Setting Parameters].
Set H6-02 [Terminal RP Frequency Scaling] to the pulse train
frequency during 100% reference (maximum motor rotation speed).
Detection Delay Time].
Note:
If you turn the phase advancing capacitors ON and OFF and use
thyristor converters in the same power supply system, there can
be surge voltages that irregularly increase the input voltage.
1. Examine the motor main circuit cable, terminals, and motor
terminal box, and then remove ground faults.
2. Re-energize the drive.
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].
The PASS display will turn off after communications test mode is
cleared.
• Make the drive input power stable.
• Make the drive input power stable.
• If the supply voltage is good, examine the magnetic contactor on
the main circuit side for problems.
• Examine the capacitor maintenance time in monitor U4-05
[CapacitorMaintenance].
• If U4-05 is more than 90%, replace the capacitor. Contact
Yaskawa or your nearest sales representative for more
information.
• Examine the supply voltage for problems.
• Re-energize the drive.
• If the alarm stays, replace the circuit board or the drive. For
information about replacing the control board, contact Yaskawa
or your nearest sales representative.
Examine for wiring errors or disconnected wires in the encoder
cable, and repair problems.
The holding brake is stopping the motor.Release the holding brake.
Note:
• The drive detects this error if it does not receive the speed detection pulse signal from the encoder in the detection time set in F1-14 [Encoder Open-Circuit Detect Time].
• If the drive detects this error, the terminal assigned to H2-01 to H2-03 = 10 [MFDO Function Select = Alarm] will activate.
• If the drive detects this error, it will operate the motor as specified by the stopping method set in F1-02 [PG Open Circuit Detection Select].
CodeNameCausesPossible Solutions
rUnMotor Switch during Run
Note:
If the drive detects this error, the terminal set to H2-01 to H2-03 = 10 [MFDO Function Selection = Alarm] will activate.
CodeNameCausesPossible Solutions
SEModbus Test Mode Error
Note:
If the drive detects this error, the terminal set to H2-01 to H2-03 = 10 [MFDO Function Selection = Alarm] will activate.
CodeNameCausesPossible Solutions
SToFSafe Torque OFF Hardware
Note:
If the drive detects this error, the terminal set to H2-01 to H2-03 = 10 [MFDO Function Selection = Alarm] will activate.
CodeNameCausesPossible Solutions
TiMKeypad Time Not Set
Note:
• Parameter o4-24 [bAT Detection Selection] enables and disables TiM detection.
• If the drive detects this error, the terminal set to H2-01 to H2-03 = 10 [MFDO Function Selection = Alarm] will activate.
CodeNameCausesPossible Solutions
TrPCIGBT Maintenance Time (90%)
Note:
If the drive detects this error, the terminal set to H2-01 to H2-03 = 10 [MFDO Function Selection = Alarm] will activate.
CodeNameCausesPossible Solutions
UL3Undertorque Detection 1
Note:
• The drive detects this error if the drive output current is less than the level set in L6-02 for longer than L6-03.
• If the drive detects this error, the terminal set to H2-01 to H2-03 = 10 [MFDO Function Selection = Alarm] will activate.
• Set the conditions that trigger the minor fault using L6-01 [Torque Detection Selection 1].
CodeNameCausesPossible Solutions
UL4Undertorque Detection 2
Note:
• The drive detects this error if the drive output current is less than the level set in L6-05 for longer than L6-06.
• If the drive detects this error, the terminal set to H2-01 to H2-03 = 10 [MFDO Function Selection = Alarm] will activate.
• Set the conditions that trigger the minor fault using L6-04 [Torque Detection Selection 2].
CodeNameCausesPossible Solutions
UL5Mechanical Weakening Detection 2
Note:
• If the drive detects this error, the terminal set to H2-01 to H2-03 = 10 [MFDO Function Selection = Alarm] will activate.
• If the drive detects this error, it will operate the motor as specified by the Stopping Method set in L6-08.
The drive received a Motor 2 Selection [H1-xx = 16]
during run.
MEMOBUS/Modbus communications selfdiagnostics [H1-xx = 67] was done while the drive
was running.
One of the two terminals H1-HC and H2-HC received
the Safe Disable input signal.
The Safe Disable input signal is wired incorrectly.
There is internal damage to one Safe Disable channel. Replace the board or the drive. For information about replacing the
There is a battery in the keypad, but the date and time
are not set.
The IGBT is at 90% of its expected performance life. Replace the IGBT or the drive. For information about replacing the
A fault occurred on the machine.
Example: There is a broken pulley belt.
The parameters are incorrect for the load.Adjust L6-02 [Torque Detection Level 1] and L6-03 [Torque
A fault occurred on the machine.
Example: There is a broken pulley belt.
The parameters are incorrect for the load.Adjust L6-05 [Torque Detection Level 2] and L6-06 [Torque
The drive detected undertorque as specified by the
conditions for mechanical weakening detection set in
L6-08 [Mechanical Fatigue Detect Select].
Make sure that the drive receives the Motor 2 Selection while the
drive is stopped.
Stop the drive and do MEMOBUS/Modbus communications selfdiagnostics.
• 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.
control board, contact Yaskawa or your nearest sales representative.
Set the date and time with the keypad.
control board, contact Yaskawa or your nearest sales representative.
Examine the machine and remove the cause of the fault
Detection Time 1].
Examine the machine and remove the cause of the fault
• The drive detects this error if one of these conditions is correct when the Run command has not been input (while the drive is stopped).
–The DC bus voltage < L2-05 [Undervoltage Detection Lvl (Uv1)].
–The Contactor that prevents inrush current in the drive was opened.
–There is low voltage in the control drive input power.
• If the drive detects this error, the terminal set to H2-01 to H2-03 = 10 [MFDO Function Selection = Alarm] will activate.
The drive input power voltage is changing too much.• Use a better power supply voltage to align with the drive rated
A phase loss occurred in the drive input power.Correct errors with the wiring for main circuit drive input power.
There is loose wiring in the drive input power
terminals.
There was a loss of power.Use a better power supply.
The main circuit capacitors have deteriorated.Examine the capacitor maintenance time in monitor U4-05
The drive input power transformer is too small and
voltage drops when the power is switched on.
Air inside the drive is too hot.Measure the ambient temperature of the drive.
The Charge LED is broken.Replace the board or the drive. For information about replacing the
voltage.
• Make the drive input power stable.
• If there is not a fault with the input power supply, examine the
magnetic contactor on the main circuit side for faults.
Examine for loose screws and tighten them as specified by the
tightening torque values in the manual.
[CapacitorMaintenance]. If U4-05 is more than 90%, replace the
control board or the drive. For information about replacing the
control board, contact Yaskawa or your nearest sales representative.
• 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.
control board, contact Yaskawa or your nearest sales representative.
Parameter setting errors occur when multiple parameter settings do not agree, or when parameter setting values are
not correct. Refer to the table in this section, examine the parameter setting that caused the error, and remove the
cause of the error. You must first correct the parameter setting errors before you can operate the drive. The drive will
not send notification signals for the faults and alarms when these parameter setting errors occur.
CodeNameCausesPossible Solutions
oPE01Drive Capacity Setting Error
CodeNameCausesPossible Solutions
oPE02Parameter Range Setting Error
CodeNameCausesPossible Solutions
oPE03Multi-Function Input Setting Err
The value set in o2-04 [Drive Model (KVA) Selection]
does not agree with the drive model.
Parameters settings are not in the applicable setting
range.
Set E2-01 ≤ E2-03 [Motor Rated Current (FLA) ≤Motor No-Load Current].
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]
The settings for MFDIs overlap.
Note:
This does not include H1-xx = 20 to 2F [MFDI
Function Select = External Fault] and
[Reserved].
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)]
You set a minimum of two of these MFDI
combinations to Digital Inputs (H1-xx and H7-01 toH7-04) 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)]
Set o2-04 to the correct value.
1. Pushto show U1-18 [oPE Fault Parameter], and find
parameters that are not in the applicable setting range.
2. Correct the parameter settings.
Note:
• If more than one error occurs at the same time, other oPExx
errors have priority over oPE02.
• If you copy the parameter settings from the drive with
software version PRG: 1021 or earlier, and then restore to the
drive with PRG: 1022 or later, the drive may detect oPE02. If
U1-18 [oPE Fault Parameter] shows n8-36 [HFI Frequency
Level for L Tuning], reset n8-36 to the default setting and do
High Frequency Injection Tuning.
The “PRG” column on the nameplate on the right side of the
drive identifies the software version. You can also use U1-25[Software Number] to identify the software version.
Make sure that E2-01 > E2-03.
Note:
If it is necessary to set E2-01 < E2-03, first lower the value set
in E2-03, and then set E2-01.
Correct the parameter settings.
Set the parameters correctly to prevent MFDI function overlap.
Injection Braking to Stop, Coast to Stop with
Timer]
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%]
These parameters are set at the same time:
• b5-01 = 1, 2 [Enabled (Standard), Enabled (D =
Feedforward)]
• b5-11 = 1 [PID Output Reverse Selection =
Negative Output Accepted]
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.
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]
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]
Note:
When C6-05 < 7, C6-04 becomes disabled. The
drive sets the carrier frequency to the value set to
C6-03.
C6-02 to C6-05 settings are not in the applicable
setting range.
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].
The Energy Saving parameters are not set in the
applicable setting range.
• Set b5-15 ≠ 0.0.
• Set b1-03 = 0, 1 [Ramp to Stop, Coast to Stop].
Correct the parameter settings.
Correct the parameter settings.
Correct the parameter settings.
Set the parameters correctly to satisfy the conditions.
Set C6-02 to C6-05 correctly.
Set H6-06 correctly.
Make sure that E5-xx is set correctly as specified by the motor
nameplate data.
This table gives information about errors detected during Auto-Tuning. If the drive detects an Auto-Tuning error, the
keypad will show the error and the motor will coast to stop. The drive will not send notification signals for faults and
alarms when Auto-Tuning errors occur.
Two types of Auto-Tuning errors are: Endx and Erx. Endx identifies that Auto-Tuning has successfully completed
with calculation errors. Find and repair the cause of the error and do Auto-Tuning again, or set the motor parameters
manually. You can use the drive in the application if you cannot find the cause of the Endx error.
Erx identifies that Auto-Tuning was not successful. Find and repair the cause of the error and do Auto-Tuning again.
CodeNameCausesPossible Solutions
End1Excessive Rated Voltage Setting
CodeNameCausesPossible Solutions
End2Iron Core Saturation Coefficient
CodeNameCausesPossible Solutions
End3Rated Current Setting Alarm
CodeNameCausesPossible Solutions
End4Adjusted Slip Calculation Error
CodeNameCausesPossible Solutions
End5Resistance Tuning Error
CodeNameCausesPossible Solutions
End6Leakage Inductance Alarm
CodeNameCausesPossible Solutions
End7No-Load Current Alarm
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%.
The motor nameplate data entered during AutoTuning is incorrect.
Auto-Tuning results were not in the applicable
parameter setting range, and E2-07 or E2-08 [MotorSaturation Coefficient 2] have temporary values.
The rated current value is incorrect.Do Auto-Tuning again and set the correct rated current shown on the
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 SaturationCoefficient 2] is not in the applicable range.
The secondary resistor measurement results were not
in the applicable range.
The Auto-Tuning results of the Line-to-Line
Resistance were not in the applicable range.
The Auto-Tuning results were not in the applicable
parameter setting range.
A1-02 [Control Method Selection] setting is not
applicable.
The Auto-Tuning results of the motor no-load current
value were not in the applicable range.
Auto-Tuning results were less than 5% of the motor
rated current.
• 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.
• Make sure that the input motor nameplate data is correct.
• Do Auto-Tuning again and correctly set the motor nameplate
data.
• 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.
motor nameplate.
• 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.
• Make sure that the input motor nameplate data is correct.
• Examine and repair damaged motor wiring.
Make sure that the input motor nameplate data is correct, and do
Auto-Tuning again.
• Examine the value set in A1-02.
• Make sure that the input motor nameplate data is correct, and do
Auto-Tuning again.
Examine and repair damaged motor wiring.
Make sure that the input motor nameplate data is correct, and do
Auto-Tuning again.
You cannot do Inertia Tuning if the drive cannot
rotate the motor in reverse.
The result of the induced voltage tuning was not in
the applicable range.
The Auto-Tuning results of the PM motor inductance
were not in the applicable range.
The Auto-Tuning results of the PM Motor Stator
Resistance were not in the applicable range.
The motor data is incorrect.Do Stationary Auto-Tuning again.
Examine and repair motor wiring.
• 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. For information about
replacing the control board, contact Yaskawa or your nearest
sales representative.
Connect the motor and do Auto-Tuning.
replacing the control board, contact Yaskawa or your nearest sales
representative.
perform Auto-Tuning again.
Examine and repair motor wiring.
Decrease the value set in C5-01 [ASR Proportional Gain 1].
• 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.
• 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.
1. Enable reverse in the target machine.
2. Set b1-04 = 0 [Reverse Enabled].
3. Do Inertia Tuning again.
1. Make sure that the input motor nameplate data is correct.
2. Do Auto-Tuning again and correctly set the motor nameplate
data.
1. Make sure that the input motor nameplate data is correct.
2. Do Auto-Tuning again and correctly set the motor nameplate
data.
1. Make sure that the input motor nameplate data is correct.
2. Do Auto-Tuning again and correctly set the motor nameplate
data.
Note:
If the drive detects Er-25 after doing Stationary Auto-Tuning,
the motor may not be able to use high frequency injection
control. Contact Yaskawa or your nearest sales representative
for more information.
2.8 Backup Function Operating Mode Display and Errors
2.8Backup Function Operating Mode Display and Errors
◆ Operating Mode Display
When you use the LCD keypad to do the backup function, the keypad shows the running operation on the LCD
display. These indicators do not show that an error has occurred.
Keypad DisplayNameDisplayStatus
Drive and Keypad mismatch.
Should the parameters be
restored?
Restore Restore from keypadRestoring parametersFlashingThe parameters stored in the keypad have
EndBackup/restore/verify operation ended
Backup Backup from DriveBacking up parametersFlashingThe parameters stored in the drive are being
Verify Keypad & DriveVerifying parametersFlashingThe parameter settings stored in the keypad
◆ Backup Function Runtime Errors
Detection of inconsistency between the
drive and keypad
normally
Normally displayedThe drive detected the connection of a
Normally displayedThe parameter backup, restore, or verify
keypad from a different drive. Select [Yes]
to copy parameters backed up in the keypad
to the connected drive.
been restored to the drive.
operation ended normally.
backed up to the keypad.
and the parameter settings in the drive match
or are being compared.
When an error occurs, the keypad shows a code to identify the error.
The table in this section show the error codes. If there are errors, refer to these tables:
Note:
Push any key on the keypad to clear an error.
CodeNameCausesPossible Solutions
CPErControl Mode Mismatch
CodeNameCausesPossible Solutions
CPyEError Writing Data
CodeNameCausesPossible Solutions
CSErControl Mode Mismatch
CodeNameCausesPossible Solutions
dFPSDrive Model Mismatch
CodeNameCausesPossible Solutions
iFErKeypad Communication Error
CodeNameCausesPossible Solutions
ndATError Received Data
CodeNameCausesPossible Solutions
PWErDWEZ Password Mismatch
Note:
U8-11 and U8-12 [DWEZ Versions 1 and 2] show the user ID of the DWEZ program.
The keypad setting and drive setting for A1-02[Control Method Selection] do not agree.
Parameter restore did not end correctly.Restore the parameters.
The keypad is broken.Replace the keypad.
You tried to restore parameters to a different drive
model than the one that you backed up.
There was a communications error between the
keypad and the drive.
The parameter settings for model and specifications
(power supply voltage and capacity) are different
between the keypad and the drive.
The parameters are not stored in the keypad.1. Connect a keypad that has the correct parameters.
The password set in the backup operation with qx-xx
[DriveWorksEZ Parameters] and rx-xx
[DriveWorksEZ Connections] is incorrect.
1. Set A1-02 on the drive to the same value that is on the keypad.
2. Restore the parameters.
1. Examine the drive model that you used to back up the
parameters.
2. Restore the parameters.
Examine the connector or cable connection.
1. Make sure that drive model and the value set in o2-04 [DriveModel (KVA) Selection] agree.
2. Restore the parameters.
2. Restore the parameters.
Set the DWEZ PC software password supplied by Yaskawa for the
DWEZ program user ID downloaded to the drive.
When a fault occurs and the drive stops, do the procedures in this section to remove the cause of the fault, then reenergize the drive.
◆ Fault Occurs Without Power Loss
WARNING! Crush Hazard. Wear eye protection when you do work on the drive. If you do not use correct safety equipment, it can
cause serious injury or death.
WARNING! Electrical Shock Hazard. After the drive blows a fuse or trips a GFCI, do not immediately energize the drive or operate
peripheral devices. Wait for the time specified on the warning label at a minimum and make sure that all indicators are OFF. Then
check the wiring and peripheral device ratings to find the cause of the problem. If you do not know the cause of the problem, contact
Yaskawa before you energize the drive or peripheral devices. If you do not fix the problem before you operate the drive or peripheral
devices, it can cause serious injury or death.
1. Supply power to the control circuit from the external 24 V input.
2. Use monitor parameters U2-xx [Fault Trace] to show the fault code and data about the operating status of the
drive immediately before the fault occurred.
3. Use the information in the Troubleshooting tables to remove the fault.
Note:
1. To find the faults that were triggered, check the fault history in U2-02 [Previous Fault]. To find information about drive status (such as
frequency, current, and voltage) when the faults were triggered, check U2-03 to U2-20.
2. If the fault display stays after you re-energize the drive, remove the cause of the fault and reset.
◆ Fault Occurs Without Power Loss
1.
Examine the fault code shown on the keypad.
2. Use the information in the Troubleshooting tables to remove the fault.
3. Do a fault reset.
◆ Fault Reset Procedure
If a fault occurs, you must remove the cause of the fault and re-energize the drive. Table 2.3 lists the different
methods to reset the drive after a fault.
Table 2.3 Fault Reset Methods
MethodsDescription
Method 1
Method 2
While the keypad is showing the fault or alarm code, pushon the keypad.
Switch ON the MFDI terminal set to H1-xx = 14 [MFDI Function Select = Fault Reset].
Note:
The default setting for H1-04 [Terminal S4 Function Selection] is 14 [Fault Reset].
1.De-energize the drive main circuit power supply.
2.Energize the drive again after the keypad display goes out.
If the drive receives a Run command from a communication option or control circuit terminal, the drive will not reset the fault. Turn the Run
command OFF to reset the fault. If you do a fault reset when the drive has a Run command, the keypad will show minor fault CrST [RemoveRUN Command to Reset].
You entered an incorrect password in A1-04 [Password].• Enter the correct password to A1-04 again.
The drive detected Uv [Undervoltage].• View U1-07 [DC Bus Voltage] to see the power supply voltage.
• If you forgot the password, set the password again with A1-04 and A1-05 [Password Setting].
Note:
If you set the password, you cannot change these parameters until the password aligns:
• A1-01 [Access Level Selection]
• A1-02 [Control Method Selection]
• A1-03 [Initialize Parameters]
• A1-06 [Application Preset]
• A1-07 [DriveWorksEZ Function Selection]
• A2-01 to A2-32 [User Parameter 1 to User Parameter 32]
• Examine the main circuit wiring.
◆ The Motor Does Not Rotate after You Enter a Run Command
CausesPossible Solutions
The drive is not in Drive Mode.1. Make sure that the READY LED on the keypad is ON.
The drive stopped and you pushedto transfer the Run command source
to the keypad.
Auto-Tuning completed.Push and hold the ESC Key to go back to the frequency reference screen (the initial screen).
The drive received a Fast Stop command.Turn off the fast stop input signal.
The settings for the source that supplies the Run command are incorrect.Set b1-02 [Run Command Selection 1] correctly.
The frequency reference source is not set correctly.Set b1-01 [Frequency Reference Selection 1] correctly.
There is defective wiring in the control circuit terminals.• Correctly wire the drive control circuit terminals.
The settings for voltage input and current input of the master frequency
reference are incorrect.
The selection for the sinking/sourcing mode and the internal/external power
supply is incorrect.
The frequency reference is too low.• View U1-01 [Freq Reference].
The MFAI setting is incorrect.• Make sure that the functions set to the MFAI are correct. The frequency reference is 0 when H3-
You pushed.
2. If the READY LED is OFF, push and hold the ESC Key to go back to the frequency reference
screen (the initial screen).
Do one of these two:
• Push.
• Re-energize the drive.
Note:
Whenmust not change the Run command source, set o2-01 = 0 [LO/RE Key Function
Selection = Disabled].
Note:
When Auto-Tuning completes, the drive changes to Programming Mode. The drive will not
accept a Run command unless the drive is in Drive Mode.
• View U1-10 [Input Terminal Status] for input terminal status.
Examine these analog input terminal signal level settings:
• Terminal A1: H3-01 [Terminal A1 Signal Level Select]
• Terminal A2: DIP switch S1 and H3-09 [Terminal A2 Signal Level Select]
• For sinking mode, close the circuit between terminals SC-SP with a wire jumper.
• For sourcing mode, close the circuit between terminals SC-SN with a wire jumper.
• For external power supply, remove the wire jumper.
• Increase the frequency reference to a value higher than E1-09 [Minimum Output Frequency].
02, H3-10 = 1 [MFAI Function Select = Frequency Gain] and voltage (current) is not input.
• Use U1-13, U1-14 [Terminal A1, A2 Input Voltage] to make sure that the analog input values set
to terminals A1 and A2 are applicable.
Turn the Run command OFF then ON from an external input.
Note:
Troubleshooting
2
When you pushduring operation, the drive will ramp to stop. Set o2-02 = 0 [STOP Key
Function Selection = Disabled] to disable thefunction.
The 2-wire sequence and 3-wire sequence are not set correctly.• Set one of the parameters H1-03 to H1-07 [Terminals S3 to S7 Function Select] to 0 [3-Wire
Sequence] to enable the 3-wire sequence.
• If a 2-wire sequence is necessary, make sure that H1-03 to H1-07 ≠ 0.
◆ The Motor Rotates in the Opposite Direction from the Run Command
CausesPossible Solutions
The phase wiring between the drive and motor is incorrect.• Examine the wiring between the drive and motor.
• Connect drive output terminals U/T1, V/T2, and W/T3 in the correct sequence to agree with
motor terminals U, V, and W.
• Switch two motor cables U, V, and W to reverse motor direction.
The forward direction for the motor is set incorrectly.• Connect drive output terminals U/T1, V/T2, and W/T3 in the correct sequence to agree with
The signal connections for forward run and reverse run on the drive control
circuit terminals and control panel side are incorrect.
The motor is running at almost 0 Hz and the Speed Search estimated the speed
to be in the opposite direction.
motor terminals U, V, and W.
• Switch two motor cables U, V, and W to reverse motor direction.
Figure 2.1 Forward Rotating Motor
Note:
• For Yaskawa motors, the forward direction is counterclockwise when looking from the motor
shaft side.
• Refer to the motor specifications, and make sure that the forward rotation direction is correct
for the application. The forward rotation direction of motors can be different for different motor
manufacturers and types.
Correctly wire the control circuit.
Set b3-14 = 0 [Bi-directional Speed Search = Disabled], then the drive will only do speed search in
the specified direction.
◆ The Motor Rotates in Only One Direction
CausesPossible Solutions
The drive will not let the motor rotate in reverse.Set b1-04 = 0 [Reverse Operation Selection = Reverse Enabled].
The drive did not receive a Reverse run signal and 3-Wire sequence is selected. Activate the terminals to which H1-xx = 0 [3-Wire Sequence] is set, and then enable reverse
operation.
◆ The Motor Is Too Hot
CausesPossible Solutions
The load is too heavy.• Decrease the load.
The motor is running continuously at a very low speed.• Change the run speed.
The drive is operating in a vector control mode, but Auto-Tuning has not been
done.
The voltage insulation between motor phases is not sufficient.• Use a motor with a voltage tolerance that is higher than the maximum voltage surge.
The air around the motor is too hot.• Measure the ambient temperature.
The motor fan stopped or is clogged.• Clean the motor fan.
• Increase the acceleration and deceleration times.
• Examine the values set in L1-01 [Motor Overload (oL1) Protection], L1-02 [Motor Overload
Protection Time], and E2-01 [Motor Rated Current (FLA)].
• Use a larger motor.
Note:
The motor also has a short-term overload rating. Examine this rating carefully before setting
drive parameters.
• Use a drive-dedicated motor.
• Do Auto-Tuning.
• Calculate motor parameter and set motor parameters.
• Use a drive-dedicated motor that is rated for use with AC drives for applications that use a motor
on drives rated higher than 400 V class.
• Install an AC reactor on the output side of the drive and set C6-02 = 1 [Carrier Frequency
Selection = 2.0 kHz].
Note:
When the motor is connected to the drive output terminals U/T1, V/T2, and W/T3, surges occur
between the drive switching and the motor coils. These surges can be three times the drive input
power supply voltage (600 V for a 200 V class drive, 1200 V for a 400 V class drive).
• Decrease the temperature in the area until it is in the specified temperature range.
The desired Auto-Tuning mode is not available for the selected control mode.Change the motor control method with parameter A1-02 [Control Method Selection].
◆ The Motor Stalls during Acceleration or Accel/Decel Time Is Too Long
CausesPossible Solutions
The drive and motor system are at the torque limit or current suppression will
not let the drive accelerate.
Torque limit is set incorrectly.Set the torque limit correctly.
The acceleration time setting is too short.Examine the values set in C1-01, C1-03, C1-05, or C1-07 [Acceleration Time] and set them to
The load is too large.• Increase the acceleration time.
The frequency reference is low.• Examine E1-04 [Maximum Output Frequency] and increase the setting if it is set too low.
The frequency reference is set incorrectly.When H3-10 = 1 Terminal A2 Function Selection = Frequency Gain], see if the drive is set for
The motor characteristics and drive parameter settings are not compatible.• Set the correct V/f pattern to agree with the characteristics of the motor.
The drive is operating in vector control mode, but you did not complete AutoTuning.
The Stall Prevention level during acceleration setting is too low.Increase the value set in L3-02 [Stall Prevent Level during Accel].
The Stall Prevention level during run setting is too low.Increase the value set in L3-06 [Stall Prevent Level during Run].
The drive is at the limit of the V/f motor control method.• When the motor cable is longer than 50 m (164 ft), do Auto-Tuning for line-to-line resistance.
• Decrease the load.
• Use a larger motor.
Note:
Although the drive has a Stall Prevention function and a Torque Compensation Limit function, if
you try to accelerate too fast or try to drive a load that is too large, it can be too much for the
limits of the motor.
applicable values.
• Examine the mechanical brake and make sure that it is fully releasing.
• Decrease the load to make sure that the output current stays less than the motor rated current.
• Use a larger motor.
Note:
• In extruder and mixer applications, the load can increase as the temperature decreases.
• Although the drive has a Stall Prevention function and a Torque Compensation Limit function,
if you try to accelerate too fast or try to drive a load that is too large, it can be too much for the
limits of the motor.
• Examine U1-01 [Frequency Reference] for the correct frequency reference.
• Examine the multi-function input terminals to see if a frequency reference signal switch is set.
• When you use an MFAI, examine the low gain level set in H3-03, H3-11 [Terminal A1, A2 Gain
Setting].
voltage (current).
• Examine the value set in H3-10.
• Use U1-14 [Terminal A2 Input Voltage] to make sure that the analog input value set to terminal
A2 is applicable.
• Examine the V/f pattern set in E1-03 [V/f Pattern Selection].
• Do Rotational Auto-Tuning.
• Do Auto-Tuning.
• Calculate motor data and reset motor parameters.
• Examine parameters H3-02, H3-10 [MFAI Function Select]. If both of these parameters = 0,
change the settings.
• Use U1-13, U1-14 [Terminal A1, A2 Input Voltage] to make sure that the analog input values set
to terminals A1 and A2 are applicable.
Note:
When PID control is enabled, the drive adjusts the output frequency as specified by the target
value. The drive will only accelerate to the maximum output frequency set in E1-04 [MaximumOutput Frequency] while PID control is active.
◆ The Motor Speed Is Not Stable When Using a PM Motor
CausesPossible Solutions
E5-01 [PM Motor Code Selection] is set incorrectly.Refer to “Motor Performance Fine-Tuning” in the technical manual.
The drive is operating the motor at more than the specified speed control range. Examine the speed control range and adjust the speed.
The motor is hunting.Adjust these parameters to have the largest effect:
Hunting occurs at start.Increase the value set in C2-01 [S-Curve Time @ Start of Accel].
Too much current is flowing through the drive.Set E5-01 [PM Motor Code Selection] correctly as specified by the motor. For special-purpose
Operation is not stable when n8-57 = 1 [HFI Overlap Selection = Enabled].• Do High Frequency Injection Auto-Tuning.
• n8-55 [Motor to Load Inertia Ratio]
• n8-45 [Speed Feedback Detection Gain]
• C4-02 [Torque Compensation Delay Time]
motors, enter the correct value to E5-xx as specified by the motor test report.
• Decrease the value set in n8-41 [HFI P Gain] in increments of 0.5.
Note:
Set n8-41 > 0.0 for IPM motors.
◆ There Is Too Much Motor Oscillation and the Rotation Is Irregular
CausesPossible Solutions
Unsatisfactory balance of motor phases.• Make sure that the drive input power voltage supplies stable power.
• Set L8-05 = 0 [Input Phase Loss Protect Select = Disabled].
The motor is hunting.• Set n1-01 = 1 [Hunting Prevention Selection = Enabled].
• Increase the value of n2-01 [SpdFeedbackDetectCtr (AFR) Gain] or n2-02 [SpdFeedbackDetCtr
(AFR)TimeConst1].
◆ Deceleration Takes Longer Than Expected When Dynamic Braking Is Enabled
CausesPossible Solutions
The stall prevention during deceleration setting is incorrect.• Examine the setting for L3-04 [Decel Stall Prevention Selection].
The deceleration time setting is too long.Set C1-02, C1-04, C1-06, or C1-08 [Deceleration Times] to applicable values.
The motor torque is not sufficient.Use a larger motor.
• When the drive has a dynamic braking option installed, set L3-04 = 0 [Disabled].
• If the drive detects ov [Overvoltage], set L3-04 = 3 [General Purpose w/ DB resistor].
Note:
If these items are correct, the demand on the motor is more than the motor capacity:
There is no PID feedback input.• Examine the MFAI terminal settings.
• Make sure that H3-02, H3-10 = B [MFAI Function Select = PID Feedback].
• Make sure that the MFAI terminal settings agree with the signal inputs.
• Examine the connection of the feedback signal.
• Make sure that you set b5-xx [PID Control] correctly.
Note:
If there is no PID feedback input to the terminal, the detected value is 0, which causes a PID
fault and also causes the drive to operate at maximum frequency.
The detection level and the target value do not align.Use H3-03, H3-11 [Terminal A1 and A2 Gain Setting] to adjust PID target and feedback signal
Reverse drive output frequency and speed detection. When output frequency
increases, the sensor detects a speed decrease.
scaling.
Note:
PID control keeps the difference between the target value and detection value at 0. Set the input
level for the values relative to each other.
Auto-Tuning has not been done in vector control method.Do Auto-Tuning.
The control method was changed after doing Auto-Tuning.Do Auto-Tuning again.
Stationary Auto-Tuning for Line-to-Line Resistance was done.Do Rotational Auto-Tuning.
◆ The Motor Rotates after the Drive Output Is Shut Off
CausesPossible Solutions
DC Injection Braking is too low and the drive cannot decelerate correctly.• Increase the value set in b2-02 [DC Injection Braking Current].
The stopping method makes the drive coast to stop.Set b1-03 = 0 or 2 [Stopping Method Selection = Ramp to Stop, DC Injection Braking to Stop].
• Increase the value set in b2-04 [DC Inject Braking Time at Stop].
◆ The Output Frequency Is Lower Than the Frequency Reference
CausesPossible Solutions
The frequency reference is in the Jump frequency range.Adjust d3-01 to d3-03 [Jump Frequency 1 to 3] and d3-04 [Jump Frequency Width].
The upper limit for the frequency reference has been exceeded.Set E1-04 [Maximum Output Frequency] and d2-01 [Frequency Reference Upper Limit] to the best
A large load triggered Stall Prevention function during acceleration.• Decrease the load.
L3-01 = 3 [Stall Prevent Select duringAccel = ILim Mode] has been set.1. Check whether the V/f pattern and motor parameter settings are appropriate, and set them
◆ The Motor Will Not Restart after a Loss of Power
CausesPossible Solutions
The drive did not receive a Run command after applying power.• Examine the sequence and wiring that enters the Run command.
• Set up a relay to make sure that the Run command stays enabled during a loss of power.
For applications that use 3-wire sequence, the momentary power loss continued
for a long time, and the relay that keeps the Run command has been switched
off.
Examine the wiring and circuitry for the relay that keeps the Run command enabled during the
momentary power loss ride-thru time.
If you ignore the safety messages in this manual, it will cause serious injury or death. The manufacturer is not
responsible for injuries or damage to equipment.
Run Command at Power Up Sets drive response when energizing a drive that has an external Run command. Set this parameter in
Digital Input Deadband
Time
NameDescription
applications where energizing or de-energizing the drive enables the Run command.
0 : Disregard Existing RUN Command
1 : Accept Existing RUN Command
Sets the deadband time for MFDIs.0.0 ms
◆ b2: DC Injection Braking and Short Circuit Braking
No.
(Hex.)
b2-01
(0189)
b2-02
(018A)
b2-03
(018B)
b2-04
(018C)
b2-08
(0190)
b2-12
(01BA)
b2-13
(01BB)
b2-18
(0177)
DC Injection/Zero
SpeedThreshold
DC Injection Braking
Current
DC Inject Braking Time at
Start
DC Inject Braking Time at
Stop
Magnetic Flux
Compensation Value
Short Circuit Brake Time @
Start
Short Circuit Brake Time @
Stop
Short Circuit Braking
Current
NameDescription
Sets the frequency to start DC Injection Braking or Short Circuit Braking.
Note:
This parameter is available when b1-03 = 0 [Stopping Method Selection = Ramp to Stop].
Sets the DC Injection Braking current as a percentage of the drive rated current.50%
Sets the DC Injection Braking Time at stop.0.00 s
Sets the DC Injection Braking Time at stop.Determined by A1-02
Sets how much current the drive injects when DC Injection Braking at Start starts (Initial Excitation)
as a percentage of E2-03 [Motor No-Load Current].
Sets the Short Circuit Braking time at start.0.00 s
Sets the Short Circuit Braking time at stop.A1-02 = 8: 0.00 s
Sets the Short Circuit Braking Current as a percentage of the motor rated current.
Note:
Parameter A1-02 [Control Method Selection] selects which parameter is the motor rated current.
• A1-02 = 5, 6 [OLV/PM, AOLV/PM]: E5-03 [PM Motor Rated Current (FLA)]
• A1-02 = 8 [EZOLV]: E9-06 [Motor Rated Current (FLA)]
Default
(Setting Range)
0
(0, 1)
(0.0 to 100.0 ms)
Default
(Range)
Determined by A1-02
(0.0 - 10.0 Hz)
(0 - 75%)
(0.00 - 10.00 s)
(0.00 - 10.00 s)
0%
(0 - 1000%)
(0.00 - 25.50 s)
Other than A1-02 = 8: 0.50 s
(0.00 - 25.50 s)
100.0%
(0.0 - 200.0%)
◆ b3: Speed Search
No.
(Hex.)
b3-01
(0191)
b3-02
(0192)
b3-03
(0193)
b3-04
(0194)
b3-05
(0195)
b3-06
(0196)
Expert
Speed Search at Start
Selection
SpeedSearch Deactivation
Current
Speed Search Deceleration
Time
V/f Gain during Speed
Search
Speed Search Delay TimeSets the Speed Search delay time to activate a magnetic contactor installed between the drive and
Speed Estimation Current
Level 1
NameDescription
Sets the Speed Search at Start function where the drive will perform Speed Search with each Run
command.
0 : Disable
1 : Enabled
Sets the current level that stops Speed Search as a percentage of the drive rated output current.
Usually it is not necessary to change this setting.
Sets the deceleration time during Speed Search operation. Set the length of time to decelerate from
the maximum output frequency to the minimum output frequency.
Note:
When A1-02 = 8 [Control Method Selection = EZOLV], this parameter takes effect only in
Expert Mode.
Sets the ratio used to reduce the V/f during searches to reduce the output current during speed
searches.
motor.
Sets the level of current that flows to the motor during Speed Estimation Speed Search as a
coefficient of the motor rated current. Usually it is not necessary to change this setting.
Bi-directional Speed Search Sets the direction of Speed Search to the direction of the frequency reference or in the motor rotation
Speed Est Retry Current
Level
Speed Est Retry Detection
Time
Speed Search Restart
Attempts
Speed Search Method
Selection
Speed Search Wait TimeSets the length of time the drive will wait to start the Speed Search Retry function.0.5 s
Direction Determination
Level
Speed Search Back-EMF
Threshold
Spd Search Current
Reference Lvl
Spd Search Current
Complete Lvl
Speed Search during Uv
Selection
Sets the level of current that flows to the motor during Speed Estimation Speed Search as a
coefficient of E2-03 [Motor No-Load Current] or E4-03 [Motor 2 Rated No-Load Current]. Usually
it is not necessary to change this setting.
Sets the proportional gain for the automatic current regulator during Speed Estimation Speed Search.
Also adjusts speed search responsiveness. Usually it is not necessary to change this setting.
Sets the integral time for the automatic current regulator during Speed Estimation Speed Search. Also
adjusts speed search responsiveness. Usually it is not necessary to change this setting.
Sets the gain to correct estimated frequencies from Speed Estimation Speed Search.1.05
direction as detected by the drive.
0 : Disabled
1 : Enabled
Note:
• When E9-01 = 0 [Motor Type Selection = Induction (IM)] and A1-02 = 0, 2, or 8 [Control
Method Selection = V/f, OLV, or EZOLV], the default settings change when the setting of b3-24
[Speed Search Method Selection] changes.
• When E9-01 = 1 or 2 [Permanent Magnet (PM), Synchronous Reluctance (SynRM)] and A1-02
= 0 or 8 [V/f, EZOLV], refer to 175.
When you set A1-02, b3-24, and E9-01, set b3-14.
Sets the current level for the search retry function in Speed Estimation Speed Search as a percentage
where drive rated current is a setting value of 100%.
Sets the length of time that the drive will wait to retry Speed Estimation Speed Search when too
much current flow stopped the Speed Search.
Sets the number of times to restart Speed Search if Speed Search does not complete.3 times
Sets the Speed Search method when you start the motor or when you restore power after a
momentary power loss.
Note:
• When A1-02 = 8 [Control Method Selection = EZOLV], the default setting changes when the
• When you set b3-24, it will trigger the drive to initialize b3-14 [Bi-directional Speed Search].
After you set b3-24, set b3-14.
1 : Speed Estimation
2 : Current Detection 2
Sets the level to find the motor rotation direction. Increase the value if the drive cannot find the
direction.
Sets the induced voltage for motors that use Speed Search. The drive will start Speed Search when
the motor induced voltage level is the same as the setting value. Usually it is not necessary to change
this setting.
Sets the current level that decreases the output current during Current Detection Speed Search.1.50
Sets the current level that completes Speed Search.1.20
Sets the function that starts Speed Search at start-up if the drive detects a Uv [Undervoltage] when it
receives a Run command.
Search TimeSets the length of time that the drive will run Speed Search.400 ms
Current Increment TimeSets the length of time that the drive will increase the current from zero current to the setting value of
InverseRotationSearch
WaitTime
Initial Pole Detection
Response Gain
NameDescription
◆ b4: Timer Function
No.
(Hex.)
b4-01
(01A3)
b4-02
(01A4)
b4-03
(0B30)
Expert
b4-04
(0B31)
Expert
b4-05
(0B32)
Expert
b4-06
(0B33)
Expert
b4-07
(0B34)
Expert
b4-08
(0B35)
Expert
Timer Function ON-Delay
Time
Timer Function OFF-Delay
Time
Terminal M1-M2 ON-Delay
Time
Terminal M1-M2 OFF-Delay
Time
Terminal M3-M4 ON-Delay
Time
Terminal M3-M4 OFF-Delay
Time
Terminal P2 ON-Delay Time Sets the delay time until the contact is turned ON after the function set with H2-03 turns ON.0 ms
Terminal P2 OFF-Delay
Time
NameDescription
Default
(Range)
(10 - 2000 ms)
b3-06 [Speed Estimation Current Level 1].
Sets the wait time until the drive starts inverse rotation search after it completes forward search when
you do inverse rotation search during Current Detection Speed Search.
Sets the responsiveness for initial motor magnetic pole calculation when A1-02 = 6 [Control MethodSelection = AOLV/PM]. Set b3-61 > 0.0 for an ordinary IPM motor.
It is automatically set if High Frequency Injection Tuning is used.
Note:
• Set n8-35 = 1 [Initial Pole Calculation Method = High Frequency Injection] to enable this
parameter.
• Set n8-41 [HFI P Gain] to adjust the responsiveness for initial motor magnetic pole calculation
when A1-02 = 5 [OLV/PM].
Sets the ON-delay time for the timer input.0.0 s
Sets the OFF-delay time for the timer input.0.0 s
Sets the delay time until the contact is turned ON after the function set with H2-01 turns ON.0 ms
Sets the delay time to deactivate the contact after the function set in H2-01 deactivates.0 ms
Sets the delay time to activate the contact after the function set in H2-02 activates.0 ms
Sets the delay time to deactivate the contact after the function set in H2-02 deactivates.0 ms
Sets the delay time to deactivate the contact after the function set in H2-03 deactivates.0 ms
Sets the length of time that the PID feedback signal must be more than the level set in b5-36 [PID
Feedback High Detection Lvl] to cause Excessive PID Feedback [FbH].
Sets the value that the drive sets or shows as the PID setpoint when at the maximum output
frequency.
Sets the number of digits to set and show the PID setpoint.