Yaskawa CIMR-UU4A0216F [341/644] Fault detection

Yaskawa CIMR-UU2A0248A [341/644] Fault detection
The drive performed a current offset
adjustment while the motor was rotating
The set value exceeds the allowable setting range while the drive automatically adjusts the current
offset. This generally only happens when attempting to restart a PM motor that is coasting to stop.
Set b3-01 to 1 to enable Speed Search at Start.
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 control board or the entire drive. Contact Yaskawa or a Yaskawa
representative for instructions on replacing the control board.
Digital Operator Display Fault Name
LF
Output Phase Loss
Phase loss on the output side of the drive.
Setting L8-07 to 1 or 2 enables Phase Loss Detection.
Cause Possible Solution
The output cable is disconnected
Check for wiring errors and properly connect the output cable.
Correct the wiring.
The motor winding is damaged
Check the resistance between motor lines.
Replace the motor if the winding is damaged.
The output terminal is loose
Apply the tightening torque specified in this manual to fasten the terminals. Refer to Main Circuit
Wire Gauges and Tightening Torque on page 81 for details.
The rated current of the motor being used is
less than 5% of the drive rated current
Check the drive selection and motor capacities.
An output transistor 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.
A single-phase motor is being used The drive cannot operate a single phase motor.
Digital Operator Display Fault Name
LF2
Output Current Imbalance
One or more of the phases in the output current are lost.
Cause Possible Solution
Phase loss has occurred on the output side of
the drive
Check for faulty wiring or poor connections on the output side of the drive.
Correct the wiring.
Terminal wires
are loose on the output side of
the drive
Apply the tightening torque specified in this manual to fasten the terminals. Refer to Main Circuit Wire
Gauges and Tightening Torque on page 81 for details.
The output circuit 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.
Motor impedance or motor phases are uneven
Measure the line-to-line resistance for each motor phase. Ensure all values match.
Replace the motor.
Digital Operator Display Fault Name
LSo
LSo Fault
Pull-out has been detected at low speed.
Cause Possible Solution
The incorrect motor code has been entered.
Enter the correct motor code for the PM motor being used into E5-01.
For special-purpose motors, enter the correct data to all E5 parameters according to the test report
provided for the motor.
The load is too heavy.
Reduce the load.
Use a larger drive.
The drive incorrectly detected the position of
the motor poles.
Make sure some external force is not rotating the motor at start.
Enable Speed Search Selection at start. (b3-01 = 1).
If the value displayed in U6-57 is lower than 819, then set the polarity judge current (n8-84) higher
than the default value.
Values set to parameters L8-93, L8-94, and
L8-95 are incorrect.
Increase the value set to L8-93.
Increase the value set to L8-94.
Increase the value set to L8-95.
This function prevents continuous operation in reverse when using high frequency injection (n8-57 = 1) in AOLV/PM (A1-02 = 6) with a motor
for which no
motor code has been entered (it does not only prevent reverse operation). Set L8-93, L8-94, and L8-95 to low values within range of
erroneous detection to quickly detect undesirable reverse operation.
6.4 Fault Detection
YASKAWA ELECTRIC SIEP C710636 04C U1000 Industrial MATRIX Drive Technical Manual
341
6
Troubleshooting

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