YASKAWA GA500 Maintenance & Troubleshooting page 46

2.4 Fault
Code Name
LF Output Phase Loss
Note:
• The drive detects this fault if phase loss occurs on the output side of the drive.
• Do a Fault Reset to clear the fault.
• Set L8-07 [Output Phase Loss Protection Sel] to enable and disable LF detection.
Code Name
LF2 Output Current Imbalance
Note:
• The drive detects this fault if there is not balance between the three phases of the output current from the PM motor.
• Do a Fault Reset to clear the fault.
Code Name
LSo Low Speed Motor Step-Out
Note:
• The drive detects this fault if it detects step-out while running at low speed.
• Do a Fault Reset to clear the fault.
• LSo is a protective function that stops the motor and stops the reverse run if a motor without a motor code incorrectly detects the initial polarity. To quickly detect motor reversal,
decrease the values set in L8-93 to L8-95 to a range in which the drive does not malfunction.
Code Name
nSE Node Setup Error
Note:
Do a Fault Reset to clear the fault.
46
Causes
The motor main circuit cable is disconnected.
There is a disconnection in the motor coil winding.
The screws on the drive output terminals are loose.
The rated output current of the motor is less than 5%
of the drive rated current.
You are trying to use a single-phase motor.
The output transistor in the drive is damaged.
Causes
Phase loss occurred in the wiring on the output side
of the drive.
The output terminal screws of the drive are loose.
There is not balance between the three phases of the
PM motor impedance.
The drive output circuit is broken.
Causes
The motor code set incorrectly.
The load is too large.
An external force on the load side caused the motor to
move at start.
The drive incorrectly detected the motor magnetic
pole position.
The setting of n8-84 [Polarity Detection Current] is
too low.
Incorrect values set in L8-93 [Low Speed Pull-out
DetectionTime], L8-94 [Low Speed Pull-out Detect
Level], and L8-95 [Low Speed Pull-out Amount].
The drive incorrectly detected the motor magnetic
pole position.
Causes
The H1-xx = 47 [Node Setup (CANopen)] terminal
was activated during run.
The drive received a Run command while the Node
Setup function was active.
YASKAWA TOEPYAIGA5001A GA500 DRIVE MAINTENANCE & TROUBLESHOOTING
Possible Solutions
Connect motor main circuit cable wiring. Correct wiring errors in
the main circuit drive input power.
If a coil is disconnected, measure the motor Line-to-Line Resistance
and replace the motor.
Tighten the terminal screws to the correct tightening torque.
Examine the drive capacity or the motor output to be applied.
The drive cannot operate a single-phase motor.
• Re-energize the drive.
• If the fault stays, replace the control board or the drive. For
information about replacing the control board, contact Yaskawa
or your nearest sales representative.
Possible Solutions
Examine for wiring errors or disconnected wires on the output side
of the drive, and repair problems.
Tighten the terminal screws to the correct tightening torque.
• Measure the Line-to-Line Resistance for each motor phase and
make sure that resistance is equal in the three phases, and that all
wires are connected correctly.
• Replace the motor.
• Re-energize the drive.
• If the fault stays, replace the control board or the drive. For
information about replacing the control board, contact Yaskawa
or your nearest sales representative.
Possible Solutions
• Set E5-01 [PM Motor Code Selection] correctly as specified by
the motor.
• For specialized motors, refer to the motor test report and set E5-
xx correctly.
• Decrease the load.
• Replace the drive and motor with larger capacity models.
Find and repair problems on the load side that cause the motor to
rotate from the load side.
• Set b3-01 = 1 [Speed Search at Start Selection = Enabled].
• If the value for U6-57 [PolePolarityDeterVal] is lower than 819,
increase the value set in n8-84 [Polarity Detection Current].
Consult the motor manufacturer for information about maximum
setting values.
Increase the n8-84 setting from the default. Consult the motor
manufacturer for information about maximum setting values.
Increase the values set in L8-93 to L8-95.
If you are using an IPM motor, do High Frequency Injection Auto-
Tuning.
Possible Solutions
Stop the drive when the Node Setup function is in use.