YASKAWA CIPR-GA50UВ001AJ Series Installation & Primary Operation page 125

Code Name
Low Speed Motor
LSo
Step-Out
YASKAWA TOEPC7106170YB YASKAWA AC Drive GA500 Installation & Primary Operation
Causes
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.
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].
15 Troubleshooting
Possible Solutions
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.
• 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.
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