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Yaskawa iQpump Micro AC Drive Compact Intelligent Pump Controller. User Manual (2014) - page 7

5.11 P: Pump

When P9-12 is set to 2, the output frequency must also fall below the level set in P9-13.

No.

Name

Setting Range

Default

P9-14

Remove Delta Level

0.0 to 6000.0

0.0 PSI

n P9-15: Remove Delay Time

Sets the delay time before the lead drive is removed from the system.

No.

Name

Setting Range

Default

P9-15

Remove Delay Time

0 to 3600 s

10 s

n P9-16: Stabilization Time

Sets the time used to stabilize the system when a pump is staged or de-staged. Lead-lag control and pump protection is

suspended during this time.

No.

Name

Setting Range

Default

P9-16

Stabilization Time

0 to 3600 s

3 s

n P9-17: Setpoint Modifier

The system setpoint is incremented with the P9-17 value depending on the number of pumps running.

Pump 1: Setpoint

Pump X: Setpoint + ((X-1) (P9-17))

No.

Name

Setting Range

Default

P9-17

Setpoint Modifier

-999.9 to 999.9

0.0 PSI

n P9-18: High Feedback Quick De-Stage

Sets the feedback level to trigger a quick de-stage as a percentage of parameter P1-09.

No.

Name

Setting Range

Default

P9-18

High Feedback Quick De-Stage

0.0 to 100.0%

97.0%

The quick de-stage ignores parameters P9-12 to P9-15 and only uses an internal 2-second delay. A setting of 0.0 disables the

High Feedback De-stage feature.

n P9-19: Alternation Unit

Selects the units for parameter P9-03, Alternation Time.

No.

Name

Setting Range

Default

P9-19

Alternation Unit

0, 1

0

Setting 0: Hours

Setting 1: Minutes

n P9-20: Allow Network Run

No.

Name

Setting Range

Default

5

P9-20

Allow Network Run

0 to 3

0

Setting 0: Always

Allows the drive to respond to all network Run commands (first drive, staging, alternation).

Setting 1: First/Alternation

The drive is limited to being either the first drive or for alternation.

Setting 2: First only

The drive can only be a first drive.

241

5.11 P: Pump

Setting 3: Alternation only

The drive is only available for alternation. When P9-04 is set to 0, FIFO Auto, and there are two drives or more running, the

iQpump MEMOBUS Network does not actually alternate a drive in, but it removes the expired first drive and allows the

iQpump MEMOBUS Multiplex feature to stage a new drive. Explicit alternation still occurs in FIFO Auto when there is only

one drive running at time of alternation.

n P9-21: Run Priority

Sets the lead drive selection priority overriding the P9-01 selection. If multiple drives have the lowest P9-21 value, then P9-01

determines which drive becomes the lead.

No.

Name

Setting Range

Default

P9-21

Run Priority

1 to 16

8

n P9-22: System Fault Retry

No.

Name

Setting Range

Default

P9-22

System Fault Retry

0 to 10

5

When a system fault is detected, the iQpump MEMOBUS Network sends out a system message to all other drives informing

them of the fault, stops all drives that are running, and prevents any drives from running until the fault is cleared.

When Fault Restarts are enabled, system faults do not consume L5-01 attempts, but instead use P9-22. The system fault retry

attempts apply to all the drives on the network and are incremented when a drive with a system fault auto-restarts. Set this

parameter to the same value on all drives in the MEMOBUS network for proper operation.

The following faults are considered system faults on the MEMOBUS network and work as described below:

Not Maintaining Setpoint: Active on the lead drive in the network. When the lead drive has an NMS fault, it will stop all

other network drives and prevent the drives from running until the fault is cleared. The HOA keypad display message “Net

Pump Err” is displayed on all other network drives.

Low Feedback / Low Water Level: Active on any network drive. When the drive has an LFB or LWL fault, it will stop all

other network drives and prevent the drives from running until the fault is cleared. The HOA keypad display message “Net

Pump Err” is displayed on all other network drives.

High Feedback / High Water Level: Active on any network drive. When the lead drive has an HFB or HWL fault, it will

stop all other network drives and prevent them from running until the fault is cleared. The HOA keypad display message “Net

Pump Err” is displayed on all other network drives.

Flow Meter: Low Flow, High Flow, and Accumulated Level:Active on any network drive that has an Auto Run command.

When the drive has a LOWFL, HIFLO, or ACCUM fault, the network stops all other drives and prevent them from running

until the fault is cleared. The HOA keypad display message “Net Pump Err” is displayed on all other network drives.

Setting P9-22 to 0 disables the system restart regardless of L5-01, P4-07, and P4-08 parameter settings. When P9-22 > 0, and

L5-01 = 0 or P4-07/P4-08 are set to disable the fault restart, when that drive gets a system fault, the system will not be able

to restart.

When a drive with a system fault auto-restarts, the network System Fault Restart counter gets incremented and the L5-01 fault

restart counter does not increase. When the system fault restart counter equals the P9-22 setting, the iQpump MEMOBUS

Network disables automatic fault restart and manually resetting the fault will clear the system fault restart counter. If the

iQpump MEMOBUS Network does not experience a system fault for 10 minutes, it clears the system restart fault counter.

Note:

Losing power or communications to a drive with a system fault will clear the fault and allow other drives in the system to run.

n P9-23: Maximum Number of Running Pumps

Limits the maximum number of pumps that can run on the system.

No.

Name

Setting Range

Default

P9-23

Maximum Number of Running Pumps

1 to 8

8

n P9-24: Lead Swap at Sleep

Sets the time that the lead drive must be asleep when another drive is available with a lower P9-21 value until the drive will

request for a swap. A setting of 0 disables this function.

No.

Name

Setting Range

Default

P9-24

Lead Swap at Sleep

0 to 7200 s

0 s

242

5.11 P: Pump

n P9-25: Highest Node Address

Selects the highest possible node address in the Modbus network.

To yield optimal network performance, set serial communication address H5-01 starting from 01h and then consecutively up

to the last drive and then set the P9-25 parameter to highest used H5-01 address.

No.

Name

Setting Range

Default

P9-25

Highest Node Address

2 to 8

8

n P9-26: Master Time-out

Sets the minimum amount of time that the follower drives will wait for a message from the master before performing the action

set in P9-27.

No.

Name

Setting Range

Default

P9-26

Master Time-out

1.0 to 10.0 s

4.0 s

n P9-27: Network Recovery

Sets the follower drive response action when no messages are received from the master for the time set in P9-26.

No.

Name

Setting Range

Default

P9-27

Network Recovery

0 to 3

0

Setting 0: Automatic

Drive will attempt to assume master functionality.

Setting 1: Slave/resume

Drive will continue running when the master is lost, and will wait for a master to come online.

Note:

Drive will keep running in its current operation state which could cause an undesirable condition.

Setting 2: Slave/stop

Drive will stop running when the master is lost, and will wait for a master to come online.

Setting 3: Fault MSL

Fault the drive with an MSL (Master Lost).

n P9-28: NETSCAN Alarm Time

Sets the amount of time that the follower drives will wait for a message from the master before displaying a NETSCAN alarm.

No.

Name

Setting Range

Default

P9-28

NETSCAN Alarm Time

1.0 to 10.0 s

2.0 s

n P9-29: Net Start Delay

Sets the time that the drive will wait before selecting and starting the lead drive after the first drive on the network has been

put on AUTO mode.

No.

Name

Setting Range

Default

P9-29

Net Start Delay

0.0 to 60.0 s

2.0 s

5

n P9-30: Lag Drive Speed Follower Gain

Sets the gain that will be applied to the speed of the current lead drive when Lag Drive Mode is activated.

No.

Name

Setting Range

Default

P9-30

Lag Drive Speed Follower Gain

0.0 to 300.0%

100.0%

n P9-31: Lag Drive Speed Follower Bias

Sets the bias that will be applied to the speed of the current lead drive when Lag Drive Mode is activated.

No.

Name

Setting Range

Default

P9-31

Lag Drive Speed Follower Bias

-60.0 to 60.0 Hz

0.0 Hz

243

5.11 P: Pump

n P9-32: Lag Follower Deceleration Time

Sets the deceleration time when the P9-33 timer is running and the drive is running as Lag Drive Speed Follower (P9-05 = 3).

No.

Name

Setting Range

Default

P9-32

Lag Follower Deceleration Time

0.0 to 1000.0 s

60.0 s

n P9-33: Lag Follower Deceleration Time Active Time

Sets the window during which the P9-32 deceleration time is effective. The drive will use the standard deceleration rates when

the P9-32 time expires.

A setting of 0.0 will disable the Lag Follower deceleration time switching.

No.

Name

Setting Range

Default

P9-33

Lag Follower Deceleration Time Active Time

0.0 to 360.0 s

0.0 s

n P9-34: Low Feedback Quick De-Stage

Sets the low feedback level that will trigger a quick de-stage. The quick de-stage ignores parameters P9-12 to P9-15 and uses

an internal 2-second delay.

A setting of 0.0 disables the Low Feedback De-Stage feature.

No.

Name

Setting Range

Default

P9-34

Low Feedback Quick De-Stage

0.0 to 6000.0

0.0 PSI

n P9-99: Network Compatibility Selection

Selects the communication compatibility for the iQpump MEMOBUS network.

No.

Name

Setting Range

Default

P9-99

Network Compatibility Selection

0 to 2

0

Setting 0: A-Ver: 30034

Setting 1: B-Ver: 30035/36

Setting 2: iQ SmartNetwork

244

5.12 Q: PID Controller

5.12 Q: PID Controller

u Q1: Preset Setpoint

n Q1-01: PID Controller Setpoint 1

Sets the PID setpoint for the controller. The drive will use the system feedback signal and modulate the pump speed to regulate

the feedback at the Q1-01 setpoint. The units for Q1-01 are selected by b1-01 and the scaling is set in parameter P1-03. This

parameter is active when b1-01 (Reference Source) is set to 0 (HOA keypad).

No.

Parameter Name

Setting Range

Default

Q1-01

PID Controller Setpoint 1

0.0 to 6000.0

0.0 PSI

n Q1-02 to Q1-04: PID Controller Setpoint 2 to 4

Sets the PID Setpoint when the corresponding Multi Setpoint or Alternate Multi Setpoint digital inputs are closed.

No.

Name

Setting Range

Default

Q1-02 to Q1-04

PID Controller Setpoint 2 to 4

0.0 to 6000.0

0.0

n Q1-09: Setpoint MOP

Selects whether parameters Q1-01 to Q1-04 are changed via MOP using the Up and Down arrow keys on the HOA keypad.

No.

Name

Setting Range

Default

Q1-09

Setpoint MOP

0, 1

0

Setting 0: Disabled

Setting 1: Enabled

u Q3: Output Current Limit

The drive reduces the frequency reference in an attempt to limit the output current. The current limit setpoint is determined

by parameter P1-11. When the actual motor current rises above the setpoint, the frequency reference is reduced by a PI controller

and the minimum output frequency reference is limited to fmin. The HOA keypad will display a "Current Limit Foldback"

alarm when the current limit function is active.

n Q3-01: Output Current Limit Select

Enables and disables the output current regulator.

No.

Name

Setting Range

Default

Q3-01

Output Current Limit Select

0, 1

0

Setting 0: Disabled

Setting 1: Enabled

n Q3-02: Current Limit

Sets the value of the output current to which the drive will limit if the output current exceeds the value.

No.

Name

Setting Range

Default

5

Q3-02

Current Limit

0.0 to 1000.0 A

0.0 A

n Q3-10: Ripple Regulator Selection

Enables and disables the Single Phase power DC bus ripple regulator. This function will lower the output frequency if the DC

bus voltage ripple exceeds the value set in Q3-11.

No.

Name

Setting Range

Default

Q3-10

Ripple Regulator Selection

0, 1

1

245

5.12 Q: PID Controller

Setting 0: Disabled

Setting 1: Enabled

n Q3-11: Ripple Regulator Setpoint

Set as a percentage of the maximum amount of ripple allowed before an input phase loss fault is detected.

No.

Name

Setting Range

Default

Q3-11

Ripple Regulator Setpoint

0.0 to 200.0%

95.0%

u S6: Drive Protection

n S6-01: Emergency Override Speed

Sets the sped command used in emergency override mode when S6-02 = 0.

No.

Name

Setting Range

Default

S6-01

Emergency Override Speed

0.00 to 240.00 Hz

0.00 Hz

n S6-02: Emergency Override Reference Selection

Selects the emergency override speed source.

No.

Name

Setting Range

Default

S6-02

Emergency Override Reference Selection

0, 1

0

Setting 0: Use S6-01 Reference

Setting 1: Use Frequency Reference

u T: Motor Tuning

Auto-Tuning automatically sets and tunes parameters required for optimal motor performance.

Refer to T: Motor Tuning on page 368 for details on Auto-Tuning parameters.

246

6.2 Drive Faults, Alarms, Errors, and Messages

6.2

Drive Faults, Alarms, Errors, and Messages

u Types of Faults, Alarms, and Errors

Check the drive digital operator for information about possible faults if the drive or motor fails to operate.

If problems occur that are not covered in this manual, contact the nearest Yaskawa representative with the following

information:

• Drive model

• Software version

• Date of purchase

• Description of the problem

• List of modified parameters.

Table 6.1 contains descriptions of the various types of alarms, faults, and errors that may occur while operating the drive.

Table 6.1 Types of Faults, Alarms, and Errors

Type

Drive Response

Page

When the drive detects a fault:

• The digital operator or optional HOA keypad displays text indicating the specific fault and the ALM indicator

LED remains lit until the fault is reset.

Faults

• The fault interrupts drive output and the motor coasts to a stop.

253

• Some faults allow the user to select the stopping method when the fault occurs.

• If a digital output is programmed for fault output (H2-oo = E), it will close if a fault occurs.

The drive will remain inoperable until the fault is cleared. Refer to Fault Reset Methods on page 286 for details.

When the drive detects an alarm or a minor fault:

• The digital operator/HOA keypad displays text indicating the specific alarm or minor fault, and the ALM indicator

LED flashes.

• The drive continues running the motor, although some alarms allow the user to select a stopping method when

Minor Faults and

the alarm occurs.

268

Alarms

• A multi-function contact output set to be tripped by a minor fault (H2- oo = 10) closes. If the output is set to

be tripped by an alarm, the contact will not close.

• The digital operator/HOA keypad displays text indicating a specific alarm and the ALM indicator LED flashes.

Remove the cause of the problem to reset a minor fault or alarm.

An Operator Programming error occurs when parameter settings conflict or do not match hardware settings (such

as with an option card).

Operator

When the drive detects an Operator Programming error:

Programming

280

• The digital operator/HOA keypad displays text indicating the specific error.

Errors

• Multi-function contact outputs do not operate.

The drive will not operate the motor until the error has been reset. Correct the settings that caused the error.

Copy Function Errors occur when using the optional HOA keypad or the USB Copy Unit to copy, read, or verify

parameter settings.

Copy Function

• The HOA keypad displays text indicating the specific error.

283

Errors

• Multi-function contact outputs do not operate.

Pressing any key on the keypad will clear the fault. Investigate the cause of the problem (such as model

incompatibility) and try again.

The drive will display messages on the LED operator or optional HOA keypad to indicate temporary drive statuses

Digital Operator

during normal pump operation. Messages do not require any action from the user and will clear from the display

285

Display Messages

automatically.

252

6.3 Fault Detection

6.3

Fault Detection

u Fault Displays, Causes, and Possible Solutions

Table 6.2 Detailed Fault Displays, Causes, and Possible Solutions

LED Display

LCD Display

Fault Name

AJF

AJF

Anti-Jam Fault

Anti-Jam Fault

Cause

Possible Solution

The drive was not able to clear debris from

• Check for proper pump operation. Remove debris from the pump impeller.

the impeller in fewer than the number of

attempts set in P7-02. This is only effective

• Adjust the P7-03 level or the P7-02 counts.

when P7-01, Anti-jam Operation is set to 1

• Drive response to this condition is controlled by P7-01, Anti-jam Operation Selection.

(enabled).

LED Display

LCD Display

Fault Name

Option Communication Error

bv5

bUS

• The connection was lost after establishing initial communication.

• Only detected when the run command frequency reference is assigned to an option card.

Cause

Possible Solution

No signal was received from the PLC

• Check for faulty wiring.

Faulty communications wiring or an existing

• Correct the wiring.

short circuit

• Check for disconnected cables and short circuits and repair as needed.

• Check the various options available to minimize the effects of noise.

• Counteract noise in the control circuit, main circuit, and ground wiring.

• Ensure that other equipment such as switches or relays do not cause noise. Use surge absorbers if

Communication data error occurred due to

necessary.

noise

• Use only recommended cables or other shielded line. Ground the shield on the controller side or the

drive input power side.

• Separate all communication wiring from drive power lines. Install an EMC noise filter to the drive power

supply input.

The option card is damaged

Replace the option card if there are no problems with the wiring and the error continues to occur.

The option card is not properly connected to

• The connector pins on the option card do not line up properly with the connector pins on the drive.

the drive

• Reinstall the option card.

LED Display

LCD Display

Fault Name

MEMOBUS/Modbus Communication Error

ce

CE

Control data was not received for the CE detection time set to H5-09.

Cause

Possible Solution

• Check for faulty wiring.

Faulty communications wiring or an existing

• Correct the wiring.

short circuit

• Check for disconnected cables and short circuits and repair as needed.

• Check the various options available to minimize the effects of noise.

• Counteract noise in the control circuit, main circuit, and ground wiring.

• Use only recommended cables or other shielded line. Ground the shield on the controller side or the

Communication data error occurred due to

drive input power side.

noise

• Ensure that other equipment such as switches or relays do not cause noise. Use surge suppressors if

required.

• Separate all communication wiring from drive power lines. Install an EMC noise filter to the drive power

6

supply input.

LED Display

LCD Display

Fault Name

A/D Conversion Error

cpf02

CPF02

An A/D conversion error or control circuit error occurred.

Cause

Possible Solution

• Cycle power to the drive.

Control circuit is damaged

• If the problem continues, replace the drive.

253

6.3 Fault Detection

LED Display

LCD Display

Fault Name

• Check for wiring errors along the control circuit terminals.

Control circuit terminals have shorted out

• Correct the wiring.

(+V, AC).

Check the resistance of the speed potentiometer and related wiring.

Control terminal input current has exceeded

• Check the input current.

allowable levels.

• Reduce the current input to control circuit terminal (+V) to 20 mA.

LED Display

LCD Display

Fault Name

PWM Data Error

cPF03

CPF03

There is a problem with the PWM data.

Cause

Possible Solution

Hardware is damaged

Replace the drive.

LED Display

LCD Display

Fault Name

EEPROM Memory Data Error

cPF06

CPF06

Error in the data saved to EEPROM

Cause

Possible Solution

• Turn off the power and check the connection between the control board and the drive.

There is an error in EEPROM control circuit

• If the problem continues, replace the drive.

The power supply was switched off while

Reinitialize the drive (A1-03 = 2220, 3330).

parameters were being saved to the drive

LED Display

LCD Display

Fault Name

Terminal Board Communications Error

cPF07

CPF07

A communication error occurred at the terminal board.

Cause

Possible Solution

There is a faulty connection between the

Turn off the power and reconnect the control circuit terminals.

terminal board and the control board

LED Display

LCD Display

Fault Name

EEPROM Serial Communication Fault

cPF08

cPF08

EEPROM communications are not functioning properly.

Cause

Possible Solution

Terminal board or control board is not

Turn the power off and check the control terminal connections.

connected properly.

There is a faulty connection between the

Turn off the power and reconnect the control circuit terminals.

terminal board and the control board

LED Display

LCD Display

Fault Name

cPF11

CPF11

RAM Fault

Cause

Possible Solution

Hardware is damaged

Replace the drive.

LED Display

LCD Display

Fault Name

FLASH Memory Fault

cPF12

CPF12

Problem with the ROM (FLASH memory).

Cause

Possible Solution

Hardware is damaged

Replace the drive.

LED Display

LCD Display

Fault Name

Watchdog Circuit Exception

cPF13

CPF13

Self-diagnostics problem.

Cause

Possible Solution

Hardware is damaged

Replace the drive.

254

6.3 Fault Detection

LED Display

LCD Display

Fault Name

Control Circuit Fault

cPF14

CPF14

CPU error (CPU operates incorrectly due to noise, etc.)

Cause

Possible Solution

Hardware is damaged

Replace the drive.

LED Display

LCD Display

Fault Name

Clock Fault

cPF16

CPF16

Standard clock error.

Cause

Possible Solution

Hardware is damaged

Replace the drive.

LED Display

LCD Display

Fault Name

Timing Fault

cPF17

CPF17

A timing error occurred during an internal process.

Cause

Possible Solution

Hardware is damaged

Replace the drive.

LED Display

LCD Display

Fault Name

Control Circuit Fault

cPF18

CPF18

CPU error. Non-Maskable Interrupt (An unusual interrupt was triggered by noise, etc.)

Cause

Possible Solution

Hardware is damaged

Replace the drive.

LED Display

LCD Display

Fault Name

Control Circuit Fault

cPF19

CPF19

CPU error (Manual reset due to noise, etc.)

Cause

Possible Solution

Hardware is damaged

Replace the drive.

LED Display

LCD Display

Fault Name

One of the following faults occurred: RAM fault, FLASH memory error, watchdog circuit exception, clock

error

cPF20

CPF20

• RAM fault.

or

or

• FLASH memory error (ROM error).

cPF21

CPF21

• Watchdog circuit exception (self-diagnostic error).

• Clock error.

Cause

Possible Solution

Hardware is damaged

Replace the drive.

LED Display

LCD Display

Fault Name

A/D Conversion Fault

cPF22

CPF22

A/D conversion error.

Cause

Possible Solution

• Cycle power to the drive.

Control circuit is damaged.

• If the problem continues, replace the drive.

6

LED Display

LCD Display

Fault Name

PWM Feedback Fault

cPF23

CPF23

PWM feedback error.

Cause

Possible Solution

Hardware is damaged

Replace the drive.

LED Display

LCD Display

Fault Name

Drive Unit Signal Fault

cPF24

CPF24

The drive capacity cannot be detected correctly (drive capacity is checked when the drive is powered up).

255

6.3 Fault Detection

LED Display

LCD Display

Fault Name

Cause

Possible Solution

Hardware is damaged

Replace the drive.

LED Display

LCD Display

Fault Name

cPF25

CPF25

Terminal Board Not Connected

Cause

Possible Solution

Terminal board is not connected correctly

Reconnect the terminal board to the connector on the drive, then cycle the power to the drive.

LED Display

LCD Display

Fault Name

cPF26

CPF26

Control Circuit Error

to

to

cPF35

CPF35

_ _ _ _ _ _ _

_ _ _ _ _ _ _

CPU error

cPF40

CPF40

to

to

cPF43

CPF43

Cause

Possible Solution

Hardware is damaged

Replace the drive.

LED Display

LCD Display

Fault Name

SI-T3 Watchdog Timer Error

E5

E5

The watchdog timed out.

Cause

Possible Solution

Execute DISCONNECT or ALM_CLR, then issue a CONNECT command or SYNC_SET command and

Data has not been received from the PLC

proceed to phase 3. Refer to the SI-T3 Option Technical Manual for more details on troubleshooting.

LED Display

LCD Display

Fault Name

Option Card External Fault

EF0

EF0

An external fault condition is present.

Cause

Possible Solution

An external fault was received from the PLC

• Remove the cause of the external fault.

and F6-03 is set to a value other than 3.

• Remove the external fault input from the PLC.

Problem with the PLC program

Check the PLC program and correct problems.

LED Display

LCD Display

Fault Name

Pump Fault (input terminal S1)

EF1

EF1

External fault at multi-function input terminal S1.

Pump Fault (input terminal S2)

EF2

EF2

External fault at multi-function input terminal S2.

Pump Fault (input terminal S3)

EF3

EF3

External fault at multi-function input terminal S3.

Pump Fault (input terminal S4)

EF4

EF4

External fault at multi-function input terminal S4.

Pump Fault (input terminal S5)

EF5

EF5

External fault at multi-function input terminal S5.

Pump Fault (input terminal S6)

EF6

EF6

External fault at multi-function input terminal S6.

Pump Fault (input terminal S7)

EF7

EF7

External fault at multi-function input terminal S7.

Cause

Possible Solution

An external device tripped an alarm function

Remove the cause of the external fault and reset the fault.

• Properly connect the signal lines to the terminals assigned for external fault detection

Wiring is incorrect

(H1-oo = 20 to 2F).

• Reconnect the signal line.

256

6.3 Fault Detection

LED Display

LCD Display

Fault Name

Multi-function contact input setting is

• Check for unused terminals set for H1-oo = 20 to 2F (External Pump Fault).

incorrect

• Change the terminal settings.

LED Display

LCD Display

Fault Name

EEPROM Write Error

ERR

Err

Data cannot be written to the EEPROM

Cause

Possible Solution

• Press “ENTER” on the digital operator.

Noise has corrupted data while writing to the

• Correct the parameter setting.

EEPROM

• Cycle power to the drive.

• If the problem continues, replace the drive.

Hardware problem

If the problem continues, replace the drive.

LED Display

LCD Display

Fault Name

FAn

FAn

Internal Cooling Fan Failure

Cause

Possible Solution

• Cycle power to the drive.

Internal cooling fan has malfunctioned

• Check for fan operation.

• If the problem continues, replace the fan.

LED Display

LCD Display

Fault Name

PID Feedback Loss

FDBKL Wire

FDB-L

Break

The analog input programmed for PID feedback has risen above 21 mA or fallen below 3 mA.

Cause

Possible Solution

The analog input programmed for PID

• Confirm that the PID feedback source is installed and working properly.

feedback loss has risen above 21 mA or

• Drive response to this condition is controlled by b5-12, Feedback Loss 4 to 20 mA Detection Selection

fallen below 3 mA. This is effective only

and b5-13, Feedback Loss Go To Frequency.

when b5-12 Feedback Loss 4 to 20 mA

Detection Selection is set to 2 (fault).

• Auto-restart of this fault is controlled by L5-42, Feedback Loss Fault Retry Selection.

LED Display

LCD Display

Fault Name

Ground Fault

Gf

GF

• A current short to ground exceeded 50% of rated current on the output side of the drive.

• Setting L8-09 to 1 enables ground fault detection in models 2V0020 to 2V0069 and 4V0011 to 4V0038.

Cause

Possible Solution

• Check the insulation resistance of the motor.

Motor insulation is damaged

• Replace the motor.

• Check the motor cable.

A damaged motor cable is creating a short

• Remove the short circuit and reapply power to the drive

circuit

• Check the resistance between the cable and the ground terminal.

• Replace the cable.

• Reduce the carrier frequency.

Excessive leakage current at the drive output

• Reduce the amount of stray capacitance.

The drive started to run during a current

• Set b3-01 to 1 to enable Speed Search at Start.

offset fault or while coasting to a stop

• Perform Speed Search 1 or 2 (H1-oo = 61 or 62) via one of the external terminals.

Hardware problem

If the problem continues, replace the drive.

6

LED Display

LCD Display

Fault Name

High Feedback

HFB

HFB

The feedback signal is too high.

Cause

Possible Solution

257

6.3 Fault Detection

LED Display

LCD Display

Fault Name

The feedback signal has risen above the level

set in P1-11, High Feedback Level, for the

time set in P1-12, High Feedback Level Fault

• Set the High Feedback fault characteristics in P1-11 and P1-12.

Delay Time.

• Drive response to this condition is controlled by P1-13, High Feedback Selection. Auto-restart of this

This is effective only when P1-13, High

fault is controlled by L5-41, High Feedback Fault Retry Selection.

Feedback Selection, is set to 0 (Fault and

digital out).

LED Display

LCD Display

Fault Name

High Water Level

H1H20

HWL

The “High Water Level” digital input is active (H1-0o = 90).

Cause

Possible Solution

The Low Water Level switch is activated or

P1-31, High Water Digital Input

Lower the water level and/or adjust the High Water Level switch.

Configuration, is programmed incorrectly.

LED Display

LCD Display

Fault Name

Output Phase Loss

LF

LF

• Phase loss on the output side of the drive.

• Setting L8-07 to 1 or 2 enables Phase Loss Detection.

Cause

Possible Solution

• Check for wiring errors and properly connect the output cable.

The output cable is disconnected

• Correct the wiring.

• Check the resistance between motor lines.

The motor winding is damaged

• Replace the motor if the winding is damaged.

• Apply the tightening torque specified in this manual to fasten the terminals. Refer to Wire Gauges and

The output terminal is loose

Tightening Torques on page 50 for details.

The rated current of the motor being used is

Check the drive and motor capacities.

less than 5% of the drive rated current

An output transistor is damaged

If the problem continues, replace the drive.

A single-phase motor is being used

The drive cannot operate a single phase motor.

LED Display

LCD Display

Fault Name

Output current imbalance

LF2

LF2

One or more of the phases in the output current is lost.

Cause

Possible Solution

Phase loss has occurred on the output side of

• Check for faulty wiring or poor connections on the output side of the drive.

the drive.

• Correct the wiring.

Terminal wires on the output side of the drive

Apply the tightening torque specified in this manual to fasten the terminals. Refer to Wire Size and Torque

are loose.

Specifications on page 57 for details.

No signal displays from the gate driver

Replace the drive. Contact Yaskawa for assistance.

board.

Motor impedance or motor phases are

• Measure the line-to-line resistance for each motor phase. Ensure all values are the same.

uneven.

• Replace the motor. Contact Yaskawa for assistance.

LED Display

LCD Display

Fault Name

Low Feedback

LFB

LFB

The feedback signal is too low.

Cause

Possible Solution

The feedback signal has dropped below the

level set in P1-08, Low Feedback Level, for

• Set the Low Feedback fault characteristics in P1-08 and P1-09.

the time set in P1-09, Low Feedback Level

Fault Delay Time.

• Drive response to this condition is controlled by P1-10, Low Feedback Selection.

This is effective only when P1-10, Low

• Auto-restart of this fault is controlled by L5-40, Low Feedback Fault Retry Selection.

Feedback Selection, is set to 0 (Fault and

digital out).

258

6.3 Fault Detection

LED Display

LCD Display

Fault Name

Loss of Prime

LOP

LOP

The pump has lost its prime.

Cause

Possible Solution

The pump load, measured based on the P1-18

setting (output current, kilowatts, or power),

• Check for a dry well, air in the system, or no water in the system. Restart the pump using the preferred

has dropped below the level set in P1-19,

priming method suggested by the pump manufacturer.

Prime Loss Level, for the time set in P1-20,

• Set the Loss of Prime fault characteristics in P1-18, P1-19, P1-20, and P1-21.

Loss of Prime Time, and the output

• Drive response to this condition is controlled by P1-21, Loss of Prime Selection.

frequency has risen above P1-21, Prime Loss

Frequency. This is effective only when

• Auto-restart of this fault is controlled by L5-51, Loss of Prime Fault Retry Selection and P1-23, Loss of

P1-22 Loss of Prime Selection is set to 0

Prime Maximum Restart Time after Fault

(fault).

LED Display

LCD Display

Fault Name

Low Water Level

LOH20

LWL

The “Low Water Level” digital input is active (H1-0o = 8F).

Cause

Possible Solution

The Low Water Level switch is activated,

defective, or P1-30, Low Water Digital Input

Raise the water level and/or adjust the Low Water Level switch.

Configuration, is programmed incorrectly.

LED Display

LCD Display

Fault Name

Net Master Lost

MSL

N5l

Net Master Loss

The MEMOBUS master has been lost

Cause

Possible Solution

Network Recovery is set to Fault MSL

• Increase the P9-26 setting to account for network latency.

(P9-27 = 3) and no message has been

• Verify that there is a drive on the network with parameter P1-01 set to 3 and P9-27 to 0.

received from the master within the time set

in P9-26.

• Check network connections and verify H5-01 and P9-25 settings for all drives on the network.

LED Display

LCD Display

Fault Name

Not Maintaining Setpoint

NOT5P

NMS

The setpoint cannot be maintained and P1-17 is set to 0.

Cause

Possible Solution

• Check for a blocked impeller, over cycling, or broken pipe.

When the feedback deviates from the

setpoint at a level greater than P1-15, for a

• Set the Not Maintaining Setpoint fault characteristics in P1-16 and P1-17.

time set in P1-16. This is effective only when

• Drive response to this condition is controlled by P1-17, Not Maintaining Setpoint Selection.

P1-17 is set to 0 (fault).

• Auto-restart of this fault is controlled by L5-50, Setpoint Not Met Retry.

LED Display

LCD Display

Fault Name

Node Setup Error

n5e

nSE

A terminal assigned to the node setup function closed during run.

Cause

Possible Solution

The node setup terminal closed during run.

A Run command was issued while the node

Stop the drive when using the node setup function.

setup function was active.

LED Display

LCD Display

Fault Name

Overcurrent

Oc

oC

6

Drive sensors detected an output current greater than the specified overcurrent level.

Cause

Possible Solution

The motor has been damaged due to

• Check the insulation resistance.

overheating or the motor insulation is

• Replace the motor.

damaged

• Check the motor cables.

• Remove the short circuit and reapply power to the drive.

One of the motor cables has shorted out or

there is a grounding problem

• Check the resistance between the motor cables and the ground terminal.

• Replace damaged cables.

259

6.3 Fault Detection

LED Display

LCD Display

Fault Name

• Measure the current flowing into the motor.

• Replace the drive with a larger capacity drive if the current value exceeds the rated current.

The load is too heavy

• Determine if there is sudden fluctuation in the current level.

• Reduce the load to avoid sudden changes in the current level or switch to a larger drive.

Calculate the torque needed during acceleration relative to the load inertia and the specified acceleration

time. If it is not possible to set the proper amount of torque, make the following changes:

The acceleration or deceleration times are too

• Increase the acceleration time (C1-01, C1-03).

short

• Increase the S-curve characteristics (C2-01 through C2-04).

• Increase the capacity of the drive.

The drive is attempting to operate a

• Check the motor capacity.

specialized motor or a motor larger than the

• Ensure that the rated capacity of the drive is greater than or equal to the capacity rating found on the

maximum size allowed

motor nameplate.

Magnetic contactor (MC) on the output side

Set up the operation sequence so the MC does not trip while the drive is outputting current.

of the drive has turned on or off

• Check the ratios between the voltage and frequency.

V/f setting is not operating as expected

• Set parameters E1-04 through E1-10 appropriately.

• Lower the voltage if it is too high relative to the frequency.

• Check the amount of torque compensation.

Excessive torque compensation

• Reduce the torque compensation gain (C4-01) until there is no speed loss and less current.

• Review the possible solutions provided for handling noise interference.

Drive fails to operate properly due to noise

• Review the section on handling noise interference and check the control circuit lines, main circuit lines,

interference

and ground wiring.

• Check if the fault occurs simultaneously with overexcitation function operation.

Overexcitation gain is set too high

• Consider motor flux saturation and reduce the value of n3-13 (Overexcitation Deceleration Gain).

• Set b3-01 to 1 to enable Speed Search at Start.

Run command was applied while motor was

• Program the Speed Search command input through one of the multi-function contact input terminals

coasting

(H1-oo = 61 or 62).

The rated output current of the drive is too

Use a larger drive.

small

LED Display

LCD Display

Fault Name

Option Card Connection Error at Option Port CN5

oFA00

oFA00

Option compatibility error

Cause

Possible Solution

The option card installed into port CN5 is

Check if the drive supports the option card to be installed. Contact Yaskawa for assistance.

incompatible with the drive

LED Display

LCD Display

Fault Name

Option Card Fault at Option Port CN5

oFA01

oFA01

Option not properly connected

Cause

Possible Solution

The option card connection to port CN5 is

• Turn off the power and reconnect the option card.

faulty

• Check if the option card is properly plugged into the option port. Make sure the card is fixed properly.

LED Display

LCD Display

Fault Name

oFA03

oFA03

Option Card Error Occurred at Option Port CN5

oFA04

oFA04

oFA30

oFA30

to

to

Communication Option Card Connection Error (CN5)

oFA43

oFA43

Cause

Possible Solution

• Cycle power to the drive.

Option card or hardware is damaged

• If the problem continues, replace the control board or the entire drive. Contact Yaskawa or a Yaskawa

representative for instructions on replacing the control board.

260

6.3 Fault Detection

LED Display

LCD Display

Fault Name

Heatsink Overheat

oH

oH

The heatsink temperature exceeded the overheat pre-alarm level set to L8-02.

Cause

Possible Solution

• Check the temperature surrounding the drive. Verify temperature is within drive specifications.

• Improve the air circulation within the enclosure panel.

Surrounding temperature is too high

• Install a fan or air conditioner to cool the surrounding area.

• Remove anything near the drive that might be producing excessive heat.

• Measure the output current.

Load is too heavy

• Decrease the load.

• Lower the carrier frequency (C6-02).

• Replace the cooling fan. .

Internal cooling fan is stopped

• After replacing the cooling fan, set parameter o4-03 to 0 to reset the cooling fan maintenance.

LED Display

LCD Display

Fault Name

Overheat 1 (Heatsink Overheat)

oH1

oH1

The heatsink temperature exceeded the drive overheat level.

Cause

Possible Solution

• Check the temperature surrounding the drive.

• Improve the air circulation within the enclosure panel.

Surrounding temperature is too high

• Install a fan or air conditioner to cool the surrounding area.

• Remove anything near the drive that might be producing excessive heat.

• Measure the output current.

Load is too heavy

• Lower the carrier frequency (C6-02).

• Reduce the load.

• Check the maintenance time for the cooling fan (U4-04).

The internal cooling fan has reached its

• If U4-04 exceeds 90%, replace the cooling fan.

performance life or has malfunctioned.

• After replacing fan, reset the fan maintenance time (o4-03 = “0”).

Current flowing to control circuit terminal

• Check the current level of the terminal.

+V exceeded the tolerance level.

• Set the current to the control circuit terminal to be 20 mA or less.

LED Display

LCD Display

Fault Name

Motor Overheat Fault (PTC Input)

oH4

oH4

• The motor overheat signal to analog input terminal A1 or A2 exceeded the fault detection level.

• Detection requires setting multi-function analog inputs H3-02 or H3-10 to E.

Cause

Possible Solution

• Check the size of the load, the accel/decel times, and the cycle times.

• Decrease the load.

• Increase the acceleration and deceleration times (C1-01 through C1-04).

• Adjust the preset V/f pattern (E1-04 through E1-10) by reducing E1-08 and E1-10.

Motor has overheated

• Do not set E1-08 and E1-10 too low. This reduces load tolerance at low speeds.

• Check the motor rated current.

• Enter the motor rated current to parameter E2-01 as indicated on the motor nameplate.

• Ensure the motor cooling system is operating normally.

• Repair or replace the motor cooling system.

LED Display

LCD Display

Fault Name

6

Motor Overload

oL1

oL1

The electronic motor overload protection tripped

Cause

Possible Solution

Load is too heavy

Reduce the load.

Cycle times are too short during acceleration

Increase the acceleration and deceleration times (C1-01 through C1-04).

and deceleration

261

6.3 Fault Detection

LED Display

LCD Display

Fault Name

•

Reduce the load.

A general-purpose motor is driven below the

•

Increase the speed.

rated speed with a high load

•

If the motor is supposed to operate at low speeds, either increase the motor capacity or use a motor

specifically designed to operate in the desired speed range.

•

Adjust the user-set V/f pattern (E1-04 through E1-10) by reducing E1-08 and E1-10.

The output voltage is too high

•

Do not set E1-08 and E1-10 too low. This reduces load tolerance at low speeds.

•

Check the motor-rated current.

The wrong motor rated current is set to E2-01

•

Enter the motor rated current to parameter E2-01 as indicated on the motor nameplate.

•

Check the rated frequency indicated on the motor nameplate.

The base frequency is set incorrectly

•

Enter the rated frequency to E1-06 (Base Frequency).

•

Check the motor characteristics.

The electrical thermal protection

characteristics and motor overload

•

Correct the type of motor protection that has been selected (L1-01).

characteristics do not match

•

Install an external thermal relay.

The electrical thermal relay is operating at the

•

Check the current rating listed on the motor nameplate.

wrong level

•

Check the value set for the motor rated current (E2-01).

•

Overexcitation increases the motor loss and the motor temperature. Excessive duration of overexcitation

may cause motor damage. Prevent excessive overexcitation operation or apply proper cooling to the

Motor overheated by overexcitation

motor.

operation

•

Reduce the excitation deceleration gain (n3-13).

•

Set L3-04 (Stall Prevention during Deceleration) to a value other than 4.

•

Check values set to Speed Search related parameters.

Parameters related to Speed Search are set

•

Adjust the Speed Search current and Speed Search deceleration times (b3-02 and b3-03 respectively).

incorrectly

•

After Auto-Tuning, set b3-24 to 1 to enable Speed Estimation Speed Search.

Output current fluctuation due to power

Check the power supply for phase loss.

supply loss

LED Display

LCD Display

Fault Name

Drive Overload

oL2

oL2

The thermal sensor of the drive triggered overload protection.

Cause

Possible Solution

Load is too heavy

Reduce the load.

Acceleration or deceleration time is too short

Increase the settings for the acceleration and deceleration times (C1-01 through C1-04).

• Adjust the preset V/f pattern (E1-04 through E1-10) by reducing E1-08 and E1-10.

The output voltage is too high

• Do not lower E1-08 and E1-10 excessively. This reduces load tolerance at low speeds.

Drive capacity is too small

Replace the drive with a larger model.

• Reduce the load when operating at low speeds.

Overload occurred when operating at low

• Replace the drive with a model that is one frame size larger.

speeds

• Lower the carrier frequency (C6-02).

Excessive torque compensation

Reduce the torque compensation gain in parameter C4-01 until there is less current but no speed loss.

• Check the settings for all Speed Search related parameters.

Parameters related to Speed Search are set

• Adjust the current used during Speed Search (b3-03) and the Speed Search deceleration time (b3-02).

incorrectly

• After Auto-Tuning, set b3-24 to 1 to enable Speed Estimation Speed Search.

Output current fluctuation due to input phase

Check the power supply for phase loss.

loss

LED Display

LCD Display

Fault Name

Overtorque Detection 1

oL3

oL3

The current has exceeded the value set for torque detection (L6-02) for longer than the allowable time

(L6-03).

Cause

Possible Solution

Parameter settings are not appropriate for the

Check L6-02 and L6-03 settings.

load

Fault on the machine side (e.g., machine is

Check the status of the load. Remove the cause of the fault.

locked up)

262

6.3 Fault Detection

LED Display

LCD Display

Fault Name

Overtorque Detection 2

oL4

oL4

The current has exceeded the value set for Overtorque Detection 2 (L6-05) for longer than the allowable

time (L6-06).

Cause

Possible Solution

Parameter settings are not appropriate for the

Check the settings of parameters L6-05 and L6-06.

load

LED Display

LCD Display

Fault Name

Mechanical Weakening Detection 1

oL5

oL5

Overtorque occurred, matching the conditions specified in L6-08.

Cause

Possible Solution

Overtorque occurred, triggering the

Check for the cause of mechanical weakening.

mechanical weakening level set to L6-08.

LED Display

LCD Display

Fault Name

External Operator Connection Fault

The external operator has been disconnected from the drive.

oPr

oPr

Note:

An oPr fault will occur when all of the following conditions are true:

• Output is interrupted when the keypad is disconnected (o2-06 = 1).

• The Run command is assigned to the operator (b1-02 = 0 and HAND has been selected).

Cause

Possible Solution

• Check the connection between the keypad and the drive.

External operator is not properly connected

• Replace the cable if damaged.

to the drive

• Turn off the drive input power and disconnect the keypad. Reconnect the keypad and reapply drive input

power.

LED Display

LCD Display

Fault Name

Overvoltage

Voltage in the DC bus has exceeded the overvoltage detection level.

ou

ov

• For 200 V class drives: approximately 410 V

• For 400 V class drives: approximately 820 V (740 V when E1-01 is less than 400)

Cause

Possible Solution

• Increase the deceleration time (C1-02 and C1-04).

Deceleration time is too short and

• Install a dynamic braking resistor or a dynamic braking resistor unit.

regenerative energy is flowing from the

motor into the drive

• Set L3-04 to 1 to enable stall prevention during deceleration. Stall Prevention is enabled as the default

setting.

• Check if sudden drive acceleration triggers an overvoltage alarm.

• Increase the acceleration time.

Fast acceleration time causes the motor to

• Use longer S-curve acceleration and deceleration times.

overshoot the speed reference

• Enable the Overvoltage Suppression function (L3-11 = 1).

• Lengthen the S-curve at acceleration end.

The braking torque was too high, causing regenerative energy to charge the DC bus. Reduce the braking

Excessive braking load

torque, use a dynamic braking option, or lengthen decel time.

Install a DC link choke.

Surge voltage entering from the drive input

power

Note:

Voltage surge can result from a thyristor convertor and phase advancing capacitor using the

same input power supply.

Ground fault in the output circuit causes the

• Check the motor wiring for ground faults.

6

DC bus capacitor to overcharge

• Correct grounding shorts and reapply power.

• Check the settings for Speed Search-related parameters.

Improper parameters related to Speed Search

• Enable Speed Search restart function (b3-19 greater than or equal to 1 to 10).

(including Speed Search after a momentary

• Adjust the current level during Speed Search and the deceleration time (b3-02 and b3-03 respectively).

power loss and after a fault restart)

• Perform Stationary Auto-Tuning for line-to-line resistance and then set b3-14 to 1 to enable Speed

Estimation Speed Search.

• Check the voltage.

Drive input power voltage is too high

• Lower drive input power voltage within the limits listed in the specifications.

263

6.3 Fault Detection

LED Display

LCD Display

Fault Name

The braking transistor or braking resistor are

• Check braking transistor and braking resistor wiring for errors.

wired incorrectly

• Properly rewire the braking resistor device.

• Review the list of possible solutions provided for controlling noise.

Drive fails to operate properly due to noise

• Review the section on handling noise interference and check the control circuit lines, main circuit lines,

interference

and ground wiring.

• Check the load inertia settings when using KEB, overvoltage suppression, or Stall Prevention during

Load inertia is set incorrectly

deceleration.

• Adjust the load inertia ratio in L3-25 to better match the load.

• Adjust the parameters that control hunting.

Motor hunting occurs

• Set the gain for Hunting Prevention (n1-02).

LED Display

LCD Display

Fault Name

Input Phase Loss

PF

PF

Drive input power has an open phase or has a large imbalance of voltage between phases. Detected when

L8-05 is set to 1 (enabled).

Cause

Possible Solution

• Check for wiring errors in the main circuit drive input power.

There is phase loss in the drive input power

• Correct the wiring.

• Ensure the terminals are tightened properly.

There is loose wiring in the drive input power

• Apply the tightening torque as specified in this manual. Refer to Wire Gauges and Tightening

terminals

Torques on page 50 for details.

There is excessive fluctuation in the drive

• Check the voltage from the drive input power.

input power voltage

• Review the possible solutions for stabilizing the drive input power.

There is poor balance between voltage phases

Stabilize drive input power or disable phase loss detection.

• Check the maintenance time for the capacitors (U4-05).

• Replace the capacitor if U4-05 is greater than 90%. For instructions on replacing the capacitor, contact

The main circuit capacitors are worn out

Yaskawa or a Yaskawa representative.

Check for problems with the drive input power. If drive input power appears normal but the alarm continues

to occur, replace the drive.

LED Display

LCD Display

Fault Name

POc

PoC

Pump Over Cycle

Cause

Possible Solution

• Set the Pump Over Cycle fault characteristics in P2-10 and P2-11.

The pump has exceeded the number of cycles

• Drive response to this condition is controlled by P2-12, Over Cycling Mode.

set in P2-10 in the time set in P2-11 and P2-12

• Auto-restart of this fault is controlled by L5-52, Pump Over Cycle Fault Retry Selection.

is set to 2 (fault).

• Set the Pump Over Cycle automatic setpoint compensation in P2-12, Over Cycling Mode, P2-13,

Setpoint Compensation, and P2-14, Maximum Setpoint Compensation.

LED Display

LCD Display

Fault Name

Braking Resistor Overheat

rH

rH

Braking resistor protection was triggered.

Fault detection is enabled when L8-01 = 1 (disabled as a default).

Cause

Possible Solution

• Check the load, deceleration time, and speed.

Deceleration time is too short and excessive

• Reduce the load inertia.

regenerative energy is flowing back into the

• Increase the deceleration times (C1-01 to C1-04).

drive

• Replace the dynamic braking option with a larger device that can handle the power that is discharged.

The duty cycle is too high

Check the duty cycle. Maximum of 3% duty cycle is available when L8-01 = 1.

Excessive braking inertia

Recalculate braking load and braking power. Reduce the braking load by adjusting braking resistor settings.

Check the braking operation duty cycle. Braking resistor protection for ERF-type braking resistors

The braking operation duty cycle is too high

(L8-01 = 1) allows a braking duty cycle of maximum 3%.

The proper braking resistor has not been

• Check the specifications and conditions for the braking resistor device.

installed

• Select the optimal braking resistor.

Note:

The magnitude of the braking load trips the braking resistor overheat alarm, NOT the surface temperature. Using the braking resistor more

frequently than its rating permits will trip the alarm even when the braking resistor surface is not very hot.

264

6.3 Fault Detection

LED Display

LCD Display

Fault Name

Dynamic Braking Transistor

rr

rr

The built-in dynamic braking transistor failed.

Cause

Possible Solution

The braking transistor is damaged

• Cycle power to the drive and check for reoccurrence of the fault.

The control circuit is damaged

• Replace the drive.

LED Display

LCD Display

Fault Name

5c

SC

IGBT Short Circuit or Ground Fault

Cause

Possible Solution

IGBT fault

• Check motor wiring.

• Turn off the power supply, then turn it on. If the problem continues, contact your Yaskawa representative

IGBT short circuit detection circuit fault

or the nearest Yaskawa sales office.

• Check the drive output side short circuit for a broken output transistor

B1 and U/T1, V/T2, W/T3

The drive is damaged

- and U/T1, V/T2, W/T3

• Contact your Yaskawa representative or nearest Yaskawa sales office.

LED Display

LCD Display

Fault Name

Too Many Speed Search Restarts

5Er

SEr

The number of Speed Search restarts exceeded the value set to b3-19.

Cause

Possible Solution

• Reduce the detection compensation gain during Speed Search (b3-10).

Parameters related to Speed Search are set to

• Increase the current level when attempting Speed Search (b3-17).

the wrong values

• Increase the detection time during Speed Search (b3-18).

• Repeat Auto-Tuning.

The motor is coasting in the opposite

Set b3-14 to 1 to enable Bi-Directional Speed Search.

direction of the Run command

LED Display

LCD Display

Fault Name

T1 E

TIE

Time Interval Error

Cause

Possible Solution

An error has occurred in the Real-Clock Time

Replace the HOA keypad. For instructions on replacing the HOA keypad, contact Yaskawa or your nearest

function of the HOA keypad.

sales representative.

LED Display

LCD Display

Fault Name

Undertorque Detection 1

vl3

UL3

The current has fallen below the minimum value set for torque detection (L6-02) for longer than the

allowable time (L6-03).

Cause

Possible Solution

Parameter settings are not appropriate for the

Check the settings of parameters L6-02 and L6-03.

load

There is a fault on the machine side

Check the load for any problems.

LED Display

LCD Display

Fault Name

Undertorque Detection 2

vl4

UL4

The current has fallen below the minimum value set for torque detection (L6-05) for longer than the

allowable time (L6-06).

6

Cause

Possible Solution

Parameter settings are not appropriate for the

Check L6-05 and L6-06 settings

load

There is a fault on the machine side

Check the load for any problems.

LED Display

LCD Display

Fault Name

UL6

Motor Underload

vl6

Underload Det 6

The load has fallen below the underload curve defined in L6-14.

Cause

Possible Solution

265

6.3 Fault Detection

LED Display

LCD Display

Fault Name

The output current has fallen below the motor

Adjust the value set to L6-14 so that output current remains above the motor underload curve during normal

underload curve defined in L6-14 for longer

operation.

than the time set to L6-03

LED Display

LCD Display

Fault Name

DC Bus Undervoltage

One of the following conditions occurred while the drive was running:

• Voltage in the DC bus fell below the undervoltage detection level (L2-05).

Uv1

• For 200 V class: approximately 190 V (160 V for single phase drives)

vu1

• For 400 V class: approximately 380 V (350 V when E1-01 is less than 400) The fault is output only if

L2-01 = 0 or L2-01 = 1 and the DC bus voltage is under L2-05 for longer than L2-02.

The fault is output only if L2-01 is set to 0 or 1 and the DC bus voltage has fallen below the level set to

L2-05 for longer than the time set to L2-02.

Cause

Possible Solution

• The main circuit drive input power is wired incorrectly.

Input power phase loss

• Correct the wiring.

• Ensure there are no loose terminals.

One of the drive input power wiring terminals

• Apply the tightening torque specified in this manual to fasten the terminals. Refer to Wire Gauges and

is loose

Tightening Torques on page 50 for details.

• Check the voltage.

There is a problem with the voltage from the

• Correct the voltage to be within the range listed in drive input power specifications.

drive input power

• If there is no problem with the power supply to the main circuit, check for problems with the main circuit

magnetic contactor.

The power has been interrupted

Correct the drive input power.

• Check the maintenance time for the capacitors (U4-05).

The main circuit capacitors are worn

• Replace the drive if U4-05 exceeds 90%.

• Cycle power to the drive and see if the fault reoccurs.

The relay or contactor on the soft-charge

• If the problem continues, replace the drive.

bypass circuit is damaged

• Check monitor U4-06 for the performance life of the soft-charge bypass.

• Replace the drive if U4-06 exceeds 90%.

LED Display

LCD Display

Fault Name

Control Power Supply Voltage Fault

vu2

Uv2

Voltage is too low for the control drive input power.

Cause

Possible Solution

L2-02 changed from its default value in drive

that is 7.5 kW or smaller without installing a

Correct the setting to L2-02 or install an optional Momentary Power Loss Ride-Thru unit.

Momentary Power Loss Ride-Thru.

• Cycle power to the drive. Check if the fault reoccurs.

Control power supply wiring is damaged

• If the problem continues, replace the control board, the entire drive, or the control power supply. For

instructions on replacing the control board, contact Yaskawa or a Yaskawa representative.

• Cycle power to the drive. Check if the fault reoccurs.

Internal circuitry is damaged

• If the problem continues, replace the drive.

LED Display

LCD Display

Fault Name

Undervoltage 3 (Soft-Charge Bypass Circuit Fault)

vu3

Uv3

The soft-charge bypass circuit failed.

Cause

Possible Solution

• Cycle power to the drive and see if the fault reoccurs.

The relay or contactor on the soft-charge

• If the problem continues, replace the drive.

bypass circuit is damaged

• Check monitor U4-06 for the performance life of the soft-charge bypass.

• Replace the drive if U4-06 exceeds 90%.

LED Display

LCD Display

Fault Name

ult5

VLTS

Volute-Thermostat Fault

Cause

Possible Solution

266

6.4 Alarm Detection

6.4

Alarm Detection

Note:

Digital operator display text is represented in the tables below using standard font for both LCD displays and LED displays. When using

the standard LED operator, however, display text will appear in 7-segment LED (ex: “

”). When the LED fault display differs from the

LCD display, the LED display text will be shown in parentheses under the LCD display text.

u Alarm Codes, Causes, and Possible Solutions

Alarms are drive protection functions that do not necessarily cause the drive to stop. After removing the cause of an alarm,

the drive will return to its previous status before the alarm occurred.

When an alarm has been triggered, the ALM light on the digital operator display blinks and the alarm code display flashes. If

a multi-function output is set for an alarm (H2-oo = 10), that output terminal will be triggered.

Note:

If a multi-function output is set to close when an alarm occurs (H2-oo = 10), it will also close when maintenance periods are reached,

triggering alarms LT-1 through LT-4 (triggered only if H2-oo = 2F).

Table 6.3 Alarm Codes, Causes, and Possible Solutions

LED Display

LCD Display

Minor Fault Name

Station Address Setting Error (CC-Link, CANopen, MECHATROLINK)

AEr

AEr

Option card node address is outside the acceptable setting range.

Cause

Possible Solution

• Set parameter F6-10 to the proper value if a CC-Link option card is used

Station number is set outside the possible

• Set parameter F6-20 to the proper value if a MECHATROLINK option card is used.

setting range.

• Set parameter F6-35 to the proper value if a CANopen option card is used.

LED Display

LCD Display

Minor Fault Name

AnalogFB Lost

Analog Feedback Lost

AfbL

Switched to Net

Analog feedback has not been detected and the network PID feedback signal is now used.

Cause

Possible Solution

Confirm that the PID feedback source is installed and working properly. If there is no feedback source,

Defective or broken analog input source.

set P9-02 to 3 so the drive will read the network PID feedback from another drive.

Set H3-0o to B if the analog input source is to be used for PID feedback.

H3-0o is not set to B (PID Feedback)

Set P9-02 to 3 if the drive does not have an analog PID feedback source.

LED Display

LCD Display

Minor Fault Name

AJA

Anti-Jam Active

Anti-Jam Alarm

Cause

Possible Solution

The drive is attempting to clear debris from

the impeller. This is only effective when

• Alarm will clear when function is complete.

P7-01, Anti-jam Operation is set to 1

• Drive response to this condition is controlled by P7-01, Anti-jam Operation Selection.

(enabled).

LED Display

LCD Display

Minor Fault Name

BAT

bAT

Digital Operator Battery Voltage Low

Cause

Possible Solution

The digital operator battery is low

Replace the digital operator battery.

LED Display

LCD Display

Minor Fault Name

Baseblock

bb

bb

Drive output interrupted as indicated by an external baseblock signal.

Cause

Possible Solution

External baseblock signal was entered via one

of the multi-function input terminals

Check external sequence and baseblock signal input timing.

(S1 to S7).

LED Display

LCD Display

Minor Fault Name

Option Communication Error

bv5

bUS

• The connection was lost after initial communication was established.

• Assign a Run command frequency reference to the option.

Cause

Possible Solution

268

6.4 Alarm Detection

LED Display

LCD Display

Minor Fault Name

• Check for faulty wiring.

Connection is broken or master controller

• Correct the wiring.

stopped communicating.

• Check for disconnected cables and short circuits. Repair as needed.

Option is damaged.

If there are no problems with the wiring and the fault continues to occur, replace the option.

The option is not properly connected to the

• The connector pins on the option are not properly lined up with the connector pins on the drive.

drive.

• Reinstall the option.

• Check options available to minimize the effects of noise.

• Take steps to counteract noise in the control circuit wiring, main circuit lines and ground wiring.

• Try to reduce noise on the controller side.

• Use surge absorbers on magnetic contactors or other equipment causing the disturbance.

A data error occurred due to noise.

• Use recommended cables or some other type of shielded line. Ground the shield to the controller side

or on the input power side.

• Separate the wiring for communication devices from the drive input power lines. Install an EMC noise

filter to the drive input power.

LED Display

LCD Display

Minor Fault Name

Serial Communication Transmission Error

cAll

CALL

Communication has not yet been established.

Cause

Possible Solution

• Check for wiring errors.

Communications wiring is faulty, there is a

short circuit, or something is not connected

• Correct the wiring.

properly.

• Check for disconnected cables and short circuits. Repair as needed.

Programming error on the master side.

Check communications at start-up and correct programming errors.

• Perform a self-diagnostics check.

Communications circuitry is damaged.

• If the problem continues, replace the drive.

Install a termination resistor at both ends of a communication line. Set the internal termination resistor

Termination resistor setting is incorrect.

switch correctly on slave drives. Place DIP switch S2 to the ON position.

LED Display

LCD Display

Minor Fault Name

MEMOBUS/Modbus Communication Error

ce

CE

Control data was not received correctly for two seconds.

Cause

Possible Solution

• Check options available to minimize the effects of noise.

• Take steps to counteract noise in the control circuit wiring, main circuit lines, and ground wiring.

• Reduce noise on the controller side.

• Use surge absorbers for the magnetic contactors or other components that may be causing the

A data error occurred due to noise.

disturbance.

• Use only recommended shielded line. Ground the shield on the controller side or on the drive input

power side.

• Separate all wiring for communication devices from drive input power lines. Install an EMC noise filter

to the drive input power supply.

• Check the H5 parameter settings and the protocol setting in the controller.

Communication protocol is incompatible.

• Ensure settings are compatible.

• Check the PLC.

The CE detection time (H5-09) is set shorter

than the time required for a communication

• Change the software settings in the PLC.

cycle to take place.

• Set a longer CE detection time using parameter H5-09.

Incompatible PLC software settings or there

• Check the PLC.

6

is a hardware problem.

• Remove the cause of the error on the controller side.

Communications cable is disconnected or

• Check the connector to make sure the cable has a signal.

damaged.

• Replace the communications cable.

LED Display

LCD Display

Minor Fault Name

no indication

Clock Not Set

Clock Not Set

Cause

Possible Solution

269

6.4 Alarm Detection

LED Display

LCD Display

Minor Fault Name

When the drive is powered up for the first

time, the time and date must be set. The HOA

keypad will display the time and date setup

Pressing the F2 (Data) key will display the setting screen again.

screen for 30 seconds. If a button is not

pressed during this time, the display will clear

and a “Clock Not Set” alarm will flash.

LED Display

LCD Display

Minor Fault Name

cr5t

CrST

Cannot Reset

Cause

Possible Solution

• Ensure that a run command cannot be entered from the external terminals or option card during fault

Fault reset was being executed when a run

reset.

command was entered.

• Turn off the run command.

LED Display

LCD Display

Minor Fault Name

MECHATROLINK Comm. Cycle Setting Error

cyc

CyC

Comm. Cycle Setting Error was detected.

Cause

Possible Solution

The controller is using a comm. cycle beyond

Set the comm. cycle for the upper controller within the allowable setting range for the MECHATROLINK

the allowable setting range for the

option unit.

MECHATROLINK option unit.

LED Display

LCD Display

Minor Fault Name

dne

dnE

Drive Disabled

Cause

Possible Solution

“Drive Enable” is set to a multi-function

contact input (H1-oo = 6A) and the contact

Check the operation sequence.

is open.

LED Display

LCD Display

Minor Fault Name

e5

E5

MECHATROLINK Watchdog Timer Error

Cause

Possible Solution

The watchdog timer expired while waiting for

Issue a DISCONNECT or ALM_CLR command, followed by a CONNECT or SYNC_SET command

data from the controller.

and move to phase 3.

LED Display

LCD Display

Minor Fault Name

Forward/Reverse Run Command Input Error

ef

EF

Both forward run and reverse run closed simultaneously for longer than 0.5 s.

Cause

Possible Solution

Check the forward and reverse command sequence and correct the problem.

Sequence error

Note:

When minor fault EF detected, motor ramps to stop.

LED Display

LCD Display

Minor Fault Name

Option Card External Fault

ef0

EF0

An external fault condition is present.

Cause

Possible Solution

An external fault was received from the PLC

with F6-03 set to 3, which allows the drive to

• Remove the cause of the external fault.

continue running after an external fault

• Remove the external fault input from the PLC.

occurs.

There is a problem with the PLC program.

Check the PLC program and correct problems.

LED Display

LCD Display

Minor Fault Name

Pump Fault (Input Terminal S1)

ef1

EF1

External fault at multi-function input terminal S1.

Pump fault (input terminal S2)

ef2

EF2

External fault at multi-function input terminal S2.

270

6.4 Alarm Detection

LED Display

LCD Display

Minor Fault Name

Pump fault (input terminal S3)

ef3

EF3

External fault at multi-function input terminal S3.

Pump fault (input terminal S4)

ef4

EF4

External fault at multi-function input terminal S4.

Pump fault (input terminal S5)

ef5

EF5

External fault at multi-function input terminal S5.

Pump fault (input terminal S6)

ef6

EF6

External fault at multi-function input terminal S6.

Pump fault (input terminal S7)

ef7

EF7

External fault at multi-function input terminal S7.

Cause

Possible Solutions

An external device has tripped an alarm

Remove the cause of the external fault and reset the multi-function input value.

function.

• Ensure the signal lines have been connected properly to the terminals assigned for external fault detection

Wiring is incorrect.

(H1-oo = 20 to 2F).

• Reconnect the signal line.

Multi-function contact inputs are set

• Check if the unused terminals have been set for H1-oo = 20 to 2F (External Fault).

incorrectly.

• Change the terminal settings.

LED Display

LCD Display

Minor Fault Name

eof

EoF

Emergency Override Forward Run

Cause

Possible Solution

The multi-function digital input for

EmergOverrideFWD (H1-oo = AF) has

Open H1-oo = AF if the emergency condition is no longer present

been closed.

LED Display

LCD Display

Minor Fault Name

eor

Eor

Emergency Override Reverse Run

Cause

Possible Solution

The multi-function digital input for

EmergOverrideREV (H1-oo = B0) has been

Open H1-oo = B0 if the emergency condition is no longer present

closed.

LED Display

LCD Display

Minor Fault Name

SI-T3 Watchdog Timer Error

E5

E5

The watchdog timed out.

Cause

Possible Solution

Execute DISCONNECT or ALM_CLR, then issue a CONNECT command or SYNC_SET command and

Data has not been received from the PLC

proceed to phase 3. Refer to the SI-T3 Option Technical Manual for more details on troubleshooting.

LED Display

LCD Display

Minor Fault Name

FAn

FAn

Internal Cooling Fan Error

Cause

Possible Solution

• Cycle power to the drive.

6

Internal cooling fan has malfunctioned

• Check for fan operation.

• If the problem continues, replace the fan.

LED Display

LCD Display

Minor Fault Name

Safe Disable Signal Input

Hbb

Hbb

The Safe Disable Input channel is open.

Cause

Possible Solutions

Check if external safety circuit tripped and disabled the drive. If the Safe Disable function is not utilized,

There is no signal at terminal H1.

check if the terminals HC, H1, and H2 are linked.

271

6.4 Alarm Detection

LED Display

LCD Display

Minor Fault Name

Internally, the Safe Disable channel is broken.

Replace the drive.

LED Display

LCD Display

Minor Fault Name

Safe Disable Signal Input

Hbbf

HbbF

The safe disable input hardware is defective.

Cause

Possible Solutions

One of the Safe Disable channels is faulty.

Replace the drive.

LED Display

LCD Display

Minor Fault Name

Feedback Loss

PID Feedback Loss

flgt

Go To Freq.

The drive will run at the speed set in b5-13, Feedback Loss Goto Frequency.

b5-13

Cause

Possible Solutions

PID feedback source is incorrectly installed

• Confirm that the PID feedback source is installed and working properly.

or is not working. Effective only when b5-12

• Drive response to this condition is controlled by b5-12, Feedback Loss 4 to 20 mA Detection Selection,

is set to 3 (Run at b5-13).

and b5-13, Feedback Loss Go To Frequency.

LED Display

LCD Display

Minor Fault Name

Feedback Loss

PID Feedback Loss

fdb-l

Wire Break

The analog input programmed for PID feedback has gone above 21 mA or fallen below 3 mA.

Cause

Possible Solutions

• Confirm that the PID feedback source is installed and working properly.

PID feedback source is incorrectly installed

or is not working. This is effective only when

• Drive response to this condition is controlled by b5-12, Feedback Loss 4 to 20 mA Detection Selection,

b5-12 Feedback Loss 4 to 20 mA Detection

and b5-13, Feedback Loss Go To Frequency.

Selection is set to 1 (alarm).

• Auto-restart of this fault is controlled by L5-42, Feedback Loss Fault Retry Selection.

LED Display

LCD Display

Minor Fault Name

Minimum Pump Frequency Reference

Freq. Ref Pump

pfref

Min (P1-06)

Drive frequency reference is set lower than P1-06, Minimum Pump Frequency.

Cause

Possible Solutions

The frequency reference is set lower than

P1-06. The frequency reference is internally

set to the P1-06 value during this time.

This will only be active when the following

conditions are true:

Increase the frequency reference to a value greater than P1-06.

• Drive is NOT in PID Mode

• Minimum Pump Frequency is enabled

(P1-06 > 0.00)

LED Display

LCD Display

Minor Fault Name

Freq. Ref

Thrust Frequency Reference

ptHrt

Thrust (P4-12)

The fixed frequency reference is set to a value lower than the P4-12, Thrust Frequency, setting.

Cause

Possible Solutions

The frequency reference is set lower than

P4-12. The frequency reference is internally

set to the P4-12 value during this time.

This will only be active when the following

Increase the frequency reference to a value greater than P4-12.

conditions are true:

• Drive is NOT in PID Mode

• Thrust bearing is enabled (P4-12 > 0.00)

LED Display

LCD Display

Minor Fault Name

Current Alarm

Hca

HCA

Drive current exceeded overcurrent warning level (150% of the rated current).

Cause

Possible Solutions

Load is too heavy.

Reduce the load for applications with repetitive operations (i.e., stops and starts), or replace the drive.

272

6.4 Alarm Detection

LED Display

LCD Display

Minor Fault Name

• Calculate the torque required during acceleration and for the inertia moment.

Acceleration and deceleration times are too

• If the torque level is not right for the load, take the following steps:

short.

• Increase the acceleration and deceleration times (C1-01 through C1-04).

• Increase the capacity of the drive.

A special-purpose motor is being used, or the

• Check the motor capacity.

drive is attempting to run a motor greater than

• Use a motor appropriate for the drive. Ensure the motor is within the allowable capacity range.

the maximum allowable capacity.

The current level increased due to Speed

The alarm will only appear briefly. There is no need to take action to prevent the alarm from occurring in

Search after a momentary power loss or while

such instances.

attempting to perform a fault restart.

LED Display

LCD Display

Minor Fault Name

High Feedback Level Alarm

High Feedback

H1fb

High FB Sensed

The feedback signal is too high.

Cause

Possible Solutions

The feedback level has risen above the level

• Decrease the feedback signal.

set in P1-11, High Feedback Level

This is only effective when P1-13, High

• Set the High Feedback alarm characteristics in P1-11 and P-12.

Feedback Selection, is set to 1 (Alarm and

• Drive response to this condition is controlled by P1-13, High Feedback Selection.

digital out).

LED Display

LCD Display

Minor Fault Name

Loss of Prime

lop

LOP

The pump has lost its prime and P1-22 is set to 1.

Cause

Possible Solution

The measured quantity of water has dropped

below the level set in P1-19, Prime Loss

Level, for the time set in P1-20, Loss of Prime

• If there is resistance in the pump, allow the system to pump water again.

Time, and the output frequency has risen

above P1-21, Prime Loss Frequency. This

• Set the Loss of Prime alarm characteristics in P1-18, P1-19, P1-20, and P1-21.

could be due to a dry well, air in the system,

• Drive response to this condition is controlled by P1-21, Loss of Prime Selection.

or no water in the system. This is effective

only when P1-22 Loss of Prime Selection is

set to 1 (alarm).

LED Display

LCD Display

Minor Fault Name

Low City

lcp

Low City Pressure

Pressure

Cause

Possible Solution

Insufficient pressure is present on the inlet to

the pump.

• Check pressure switch contact for correct operation.

Shown when P4-24 = 0 and when the digital

• Check control wiring to drive terminal strip from pressure switch contact.

input has been active (closed for P4-21 = 0,

or open for P4-21 = 1) for the time set in

• Check to make sure that suction pressure is present by means of a separate measuring device.

P4-22.

LED Display

LCD Display

Minor Fault Name

Low Feedback Level Alarm

Low Feedback

lofb

Low FB Sensed

The feedback signal is too low.

Cause

Possible Solutions

The feedback level has dropped below the

• Increase the feedback signal.

level set in P1-08, Low Feedback Level

6

This is only effective when P1-10, Low

• Set the Low Feedback alarm characteristics in P1-08 and P1-09.

Feedback Selection, is set to 1 (Alarm and

• Drive response to this condition is controlled by P1-10, Low Feedback Selection.

digital out).

LED Display

LCD Display

Minor Fault Name

Low Suction

l5p

Low Suction Pressure

Pressure

Cause

Possible Solution

273

6.4 Alarm Detection

LED Display

LCD Display

Minor Fault Name

Shown when P4-24 = 1 and when the digital input has been active (closed for P4-21 = 0, or open for P4-21

= 1) for the time set in P4-22.

Insufficient suction pressure is present.

The drive, if running, coasts-to-stop and does not run until the digital input has been inactive for the time

set in P4-22.

LED Display

LCD Display

Minor Fault Name

Low Water in

Low Water in Tank

Tank

Cause

Possible Solution

The water level in the tank is too low.

• Check pressure switch contact for correct operation.

Shown when P4-24 = 2 and when the digital

• Check control wiring to drive terminal strip from pressure switch contact.

input has been active (closed for P4-21 = 0,

• Check to make sure that suction pressure is present by means of a separate measuring device.

or open for P4-21 = 1) for the time set in

P4-22.

• Raise the water level.

LED Display

LCD Display

Minor Fault Name

Cooling Fan Maintenance Time

The cooling fan has reached its expected maintenance period and may need to be replaced.

lt-1

LT-1

Note:

An alarm output (H2-oo = 10) will only be triggered if both

(H2-oo = 2F and H2-oo = 10) are set.

Cause

Possible Solution

The cooling fan has reached 90% of its

Replace the cooling fan and set o4-03 to 0 to reset the Maintenance Monitor.

expected performance life.

LED Display

LCD Display

Minor Fault Name

Capacitor Maintenance Time

lt-2

LT-2

The main circuit and control circuit capacitors are nearing the end of their expected performance life.

Note:

An alarm output (H2-oo = 10) will only be triggered if H2-oo = 2F.

Cause

Possible Solution

The main circuit and control circuit capacitors

have reached 90% of their expected

Replace the drive.

performance lives.

LED Display

LCD Display

Minor Fault Name

Soft Charge Bypass Relay Maintenance Time

lt-3

LT-3

The DC bus soft charge relay is nearing the end of its expected performance life.

Note:

An alarm output (H2-oo = 10) will only be triggered if H2-oo = 2F.

Cause

Possible Solution

The DC bus soft charge relay has reached

Replace the drive.

90% of expected performance life.

LED Display

LCD Display

Minor Fault Name

IGBT Maintenance Time (50%)

lt-4

LT-4

IGBTs have reached 50% of their expected performance life.

Note:

An alarm output (H2-oo = 10) will only be triggered if H2-oo = 2F.

Cause

Possible Solution

IGBTs have reached 50% of their expected

Check the load, carrier frequency, and output frequency.

performance life.

LED Display

LCD Display

Minor Fault Name

NETSCAN

NETSCAN

net5c

Waiting for

Drive is waiting for a message from the master.

Master

Cause

Possible Solution

• Increase the P9-26 setting to account for network latency.

No message was received from the master

• Verify that there is a drive on the network with parameter P1-01 set to 3 and P9-27 to 0.

within the time set in P9-28.

• Check network connections and verify H5-01 and P9-25 settings for all drives on the network.

274

6.4 Alarm Detection

LED Display

LCD Display

Minor Fault Name

Not Maintaining Setpoint

not5p

NMS

The setpoint cannot be maintained and P1-17 is set to 1.

Cause

Possible Solution

When the feedback deviates from the setpoint

• Check for a blocked impeller, over cycling, or broken pipe.

at a level greater than P1-15, for a time set in

• Set the Not Maintaining Setpoint alarm characteristics in P1-16 and P1-17.

P1-16. This is effective only when P1-17 is

set to 1 (alarm).

• Drive response to this condition is controlled by P1-17, Not Maintaining Setpoint Selection.

LED Display

LCD Display

Minor Fault Name

Heatsink Overheat

oh

oH

The temperature of the heatsink exceeded the overheat pre-alarm level set to L8-02.

Cause

Possible Solution

• Check the surrounding temperature.

• Improve the air circulation within the enclosure panel.

Surrounding temperature is too high

• Install a fan or air conditioner to cool surrounding area.

• Remove anything near drive that may cause extra heat.

• Replace the cooling fan.

Internal cooling fan has stopped.

• After replacing the drive, set parameter o4-03 to 0 to reset the cooling fan operation time.

• Provide proper installation space around the drive as indicated in the manual. Refer to Installation

Orientation and Spacing on page 28 for details.

• Allow for the proper space and ensure that there is sufficient circulation around the control panel.

Airflow around the drive is restricted.

• Check for dust or other foreign materials clogging the cooling fan.

• Clear debris caught in the fan that restricts air circulation.

LED Display

LCD Display

Minor Fault Name

Drive Overheat Warning

oh2

oH2

“Drive Overheat Warning” was input to a multi-function input terminal, S1 through S7 (H1-oo= B).

Cause

Possible Solution

An external device triggered an overheat

Search for the device that tripped the overheat warning. Remove the cause of the problem.

warning in the drive.

LED Display

LCD Display

Minor Fault Name

Motor Overheat

oh3

oH3

The motor overheat signal entered to a multi-function analog input terminal exceeded the alarm level

(H3-02 or H3-10 = E).

Cause

Possible Solutions

Motor thermostat wiring is faulty (PTC

Repair the PTC input wiring.

input).

There is a fault on the machine side (e.g., the

• Check the status of the machine.

machine is locked up).

• Remove the cause of the fault.

• Check the load size, accel/decel times, and cycle times.

• Decrease the load.

• Increase accel and decel times (C1-01 to C1-04).

• Adjust the preset V/f pattern (E1-04 through E1-10). This involves reducing E1-08 and E1-10.

Note:

Refrain from lowering E1-08 and E1-10 excessively to prevent a reduction in load tolerance

Motor has overheated.

at low speeds.

• Check the motor-rated current.

6

• Enter motor-rated current on motor nameplate (E2-01).

• Ensure the motor cooling system is operating normally.

• Repair or replace the motor cooling system.

LED Display

LCD Display

Minor Fault Name

Motor Overload

ol1

oL1

The electronic motor overload protection tripped

Cause

Possible Solution

Load is too heavy

Reduce the load.

275

6.4 Alarm Detection

LED Display

LCD Display

Minor Fault Name

Cycle times are too short during acceleration

Increase the acceleration and deceleration times (C1-01 through C1-04).

and deceleration

• Reduce the load.

A general-purpose motor is driven below the

• Increase the speed.

rated speed with a high load

• If the motor is supposed to operate at low speeds, either increase the motor capacity or use a motor

specifically designed to operate in the desired speed range.

• Adjust the user-set V/f pattern (E1-04 through E1-10) by reducing E1-08 and E1-10.

The output voltage is too high

• Do not set E1-08 and E1-10 too low. This reduces load tolerance at low speeds.

• Check the motor-rated current.

The wrong motor rated current is set to E2-01

• Enter the motor rated current to parameter E2-01 as indicated on the motor nameplate.

• Check the rated frequency indicated on the motor nameplate.

The base frequency is set incorrectly

• Enter the rated frequency to E1-06 (Base Frequency).

• Check the motor characteristics.

The electrical thermal protection

characteristics and motor overload

• Correct the type of motor protection that has been selected (L1-01).

characteristics do not match

• Install an external thermal relay.

The electrical thermal relay is operating at

• Check the current rating listed on the motor nameplate.

the wrong level

• Check the value set for the motor rated current (E2-01).

• Overexcitation increases the motor loss and the motor temperature. Excessive duration of overexcitation

may cause motor damage. Prevent excessive overexcitation operation or apply proper cooling to the

Motor overheated by overexcitation

motor.

operation

• Reduce the excitation deceleration gain (n3-13).

• Set L3-04 (Stall Prevention during Deceleration) to a value other than 4.

• Check values set to Speed Search related parameters.

Parameters related to Speed Search are set

• Adjust the Speed Search current and Speed Search deceleration times (b3-02 and b3-03 respectively).

incorrectly

• After Auto-Tuning, set b3-24 to 1 to enable Speed Estimation Speed Search.

Output current fluctuation due to power

Check the power supply for phase loss.

supply loss

LED Display

LCD Display

Minor Fault Name

Drive Overload

ol2

oL2

The thermal sensor of the drive triggered overload protection.

Cause

Possible Solution

Load is too heavy

Reduce the load.

Acceleration or deceleration time is too short

Increase the settings for the acceleration and deceleration times (C1-01 through C1-04).

• Adjust the preset V/f pattern (E1-04 through E1-10) by reducing E1-08 and E1-10.

The output voltage is too high

• Do not lower E1-08 and E1-10 excessively. This reduces load tolerance at low speeds.

Drive capacity is too small

Replace the drive with a larger model.

• Reduce the load when operating at low speeds.

Overload occurred when operating at low

• Replace the drive with a model that is one frame size larger.

speeds

• Lower the carrier frequency (C6-02).

Excessive torque compensation

Reduce the torque compensation gain in parameter C4-01 until there is less current but no speed loss.

• Check the settings for all Speed Search related parameters.

Parameters related to Speed Search are set

• Adjust the current used during Speed Search (b3-03) and the Speed Search deceleration time (b3-02).

incorrectly

• After Auto-Tuning, set b3-24 to 1 to enable Speed Estimation Speed Search.

Output current fluctuation due to input phase

Check the power supply for phase loss.

loss

LED Display

LCD Display

Minor Fault Name

Overtorque Detection 1

ol3

oL3

The current has exceeded the value set for torque detection (L6-02) for longer than the allowable time

(L6-03).

Cause

Possible Solution

Parameter settings are not appropriate for the

Check L6-02 and L6-03 settings.

load

Fault on the machine side (e.g., machine is

Check the status of the load. Remove the cause of the fault.

locked up)

276

6.4 Alarm Detection

LED Display

LCD Display

Minor Fault Name

Overtorque Detection 2

ol4

oL4

The current has exceeded the value set for Overtorque Detection 2 (L6-05) for longer than the allowable

time (L6-06).

Cause

Possible Solution

Parameter settings are not appropriate for the

Check the settings of parameters L6-05 and L6-06.

load

LED Display

LCD Display

Minor Fault Name

DC Bus Overvoltage

The DC bus voltage exceeded the trip point.

ou

ov

• For 200 V class drives: approximately 410 V

• For 400 V class drives: approximately 820 V (740 V when E1-01 < 400)

Cause

Possible Solutions

• Install a DC link choke or an AC reactor.

Surge voltage present in the drive input

• Voltage surge can result from a thyristor convertor and a phase advancing capacitor operating on the

power.

same drive input power system.

The motor is short-circuited.

• Check the motor power cable, relay terminals and motor terminal box for short circuits.

Ground current has overcharged the main

• Correct grounding shorts and turn the power back on.

circuit capacitors via the drive input power.

• Review possible solutions for handling noise interference.

• Review section on handling noise interference and check control circuit lines, main circuit lines and

Noise interference causes the drive to operate

ground wiring.

incorrectly.

• If the magnetic contactor is identified as a source of noise, install a surge protector to the MC coil.

Set number of fault restarts (L5-01) to a value other than 0.

LED Display

LCD Display

Minor Fault Name

Pump Cycling

pcyc

Pump Over

Pump Over Cycle

Cycle

Cause

Possible Solution

The pump has exceeded the number of cycles

• Set the Pump Over Cycle alarm characteristics in P2-10 and P2-11.

set in P2-10 in the time set in P2-11 and P2-12

• Drive response to this condition is controlled by P2-12, Over Cycling Mode.

is set to 1 (alarm).

LED Display

LCD Display

Minor Fault Name

rdd

R-DNE-So

Remote Drive Disable

Cause

Possible Solution

Terminal So (H1-0o = 95) has been closed

for the time set in P4-26, Remote Drive

Remove conditions causing the terminal to close.

Disable On-Delay, when P4-25, Remote

Drive Disable Selection, was set to 0 (N.O.).

Terminal So (H1-0o = 95) has been open

for the time set in P4-26, Remote Drive

Remove conditions causing the terminal to open.

Disable On-Delay, when P4-25, Remote

Drive Disable Selection, was set to 1 (N.C.).

LED Display

LCD Display

Minor Fault Name

MEMOBUS/Modbus Communication Test Mode Error

5e

SE

Note:

This alarm will not trigger a multi-function output terminal that is set for alarm output

(H2-oo = 10).

6

Cause

Possible Solution

A digital input set to 67H (MEMOBUS/

Modbus test) was closed while the drive was

Stop the drive and run the test again.

running.

LED Display

LCD Display

Minor Fault Name

tde

TdE

Time Data Error

Cause

Possible Solution

277

6.4 Alarm Detection

LED Display

LCD Display

Minor Fault Name

An error has occurred in the Real-Clock

Replace the HOA keypad. For instructions on replacing the HOA keypad, contact Yaskawa or your nearest

Time function of the HOA keypad.

sales representative.

LED Display

LCD Display

Minor Fault Name

IGBT Maintenance Time (90%)

trpc

TrPC

IGBTs have reached 90% of their expected performance life.

Cause

Possible Solution

IGBTs have reached 90% of their expected

Replace the drive.

performance life.

LED Display

LCD Display

Minor Fault Name

Undertorque Detection 1

vl3

UL3

The current has fallen below the minimum value set for torque detection (L6-02) for longer than the

allowable time (L6-03).

Cause

Possible Solution

Parameter settings are not appropriate for the

Check the settings of parameters L6-02 and L6-03.

load

There is a fault on the machine side

Check the load for any problems.

LED Display

LCD Display

Minor Fault Name

Undertorque Detection 2

vl4

UL4

The current has fallen below the minimum value set for torque detection (L6-05) for longer than the

allowable time (L6-06).

Cause

Possible Solution

Parameter settings are not appropriate for the

Check L6-05 and L6-06 settings

load

There is a fault on the machine side

Check the load for any problems.

LED Display

LCD Display

Minor Fault Name

UL6

Motor Underload

vl6

Underload Det

6

The load has fallen below the underload curve defined in L6-14.

Cause

Possible Solution

The output current has fallen below the motor

Adjust the value set to L6-14 so that output current remains above the motor underload curve during normal

underload curve defined in L6-14 for longer

operation.

than the time set to L6-03

LED Display

LCD Display

Minor Fault Name

Undervoltage

One of the following conditions was true when the drive was stopped and a Run command was entered:

vu

Uv

• DC bus voltage dropped below the level specified in L2-05.

• Contactor to suppress inrush current in the drive was opened.

• Low control drive input power voltage. This alarm outputs if L2-01

0 and DC bus voltage < L2-05.

Cause

Possible Solution

Phase loss in the drive input power.

Check for wiring errors in the main circuit drive input power. Correct the wiring.

• Ensure the terminals have been properly tightened.

Loose wiring in the drive input power

• Apply the tightening torque to the terminals as specified. Refer to Wire Gauges and Tightening

terminals.

Torques on page 50 for details.

There is a problem with the drive input power

• Check the voltage.

voltage.

• Lower the voltage of the drive input power so that it is within the limits listed in the specifications.

• Check the maintenance time for the capacitors (U4-05).

Drive internal circuitry is worn.

• Replace the drive if U4-05 exceeds 90%.

The drive input power transformer is too

• Check for an alarm when the magnetic contactor, line breaker, and leakage breaker are closed.

small and voltage drops when the power is

• Check the capacity of the drive input power transformer.

switched on.

278

6.5 Operator Programming Errors

6.5

Operator Programming Errors

u Operator Programming Error Codes, Causes, and Possible Solutions

An Operator Programmng Error (oPE) occurs when a contradictory parameter is set or an individual parameter is set to an

inappropriate value.

The drive will not operate until the parameter or parameters causing the problem are set correctly. An oPE, however, does not

trigger an alarm or fault output. If an oPE occurs, investigate the cause and refer to Table 6.4 for the appropriate action. When

an oPE appears on the operator display, press the ENTER button to view U1-18 and see which parameter is causing the oPE.

Table 6.4 oPE Codes, Causes, and Possible Solutions

LED Display

LCD Display

Error Name

Drive Capacity Setting Fault

ope01

oPE01

Drive capacity and the value set to o2-04 do not match.

Cause

Possible Solutions

The drive model selection (o2-04) and the

Correct the value set to o2-04.

actual capacity of the drive are not the same.

LED Display

LCD Display

Error Name

Parameter Range Setting Error

ope02

oPE02

Use U1-18 to find parameters set outside the range.

Cause

Possible Solutions

Parameters were set outside the possible

Set parameters to the proper values.

setting range.

Note:

When multiple errors occur simultaneously, other errors are given precedence over oPE02.

LED Display

LCD Display

Error Name

Multi-Function Input Selection Error

ope03

oPE03

A contradictory setting is assigned to multi-function contact inputs H1-01 to H1-07.

Cause

Possible Solutions

• The same function is assigned to two

• Ensure all multi-function inputs are assigned to different functions.

multi-function inputs.

• Re-enter the multi-function settings to ensure this does not occur.

• Excludes “Not used” and “External Fault.”

The Up command was set but the Down

command was not, or vice versa (settings 10

vs. 11).

Properly set the functions that required for use in combination with other functions.

The Up 2 command was set but the Down 2

command was not, or vice versa (settings 75

vs. 76).

• Run/Stop command for a 2-wire sequence

was set (H1-oo = 42), but Forward/

Reverse command (H1-oo = 43) was not.

Properly set the functions that required for use in combination with other functions.

•

“Drive Enable” is set to multi-function

input S1 or S2 (H1-01 = 6A or H1-02 =

6A).

Two of the following functions are set

simultaneously:

• Up/Down Command (10 vs. 11)

• Check if contradictory settings have simultaneously been assigned to the multi-function input terminals.

• Up 2/Down 2 Command (75 vs. 76)

• Correct setting errors.

• Hold Accel/Decel Stop (A)

• Analog Frequency Reference Sample/

Hold (1E)

The Up/Down command (10, 11) and PID

Set b5-01 to 0 to disable control PID or disable the Up/Down command.

control (b5-01) are enabled simultaneously.

280

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