6.4 Faults
346 YASKAWA ELECTRIC SIEP C710617 05F YASKAWA AC Drive GA700 Technical Manual
Code Name Causes Possible Solutions
The output transistor in the drive is
damaged.
• 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.
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 Causes Possible Solutions
LF2 Output Current Imbalance Phase loss occurred in the wiring on the
output side of the drive.
Examine for wiring errors or disconnected wires on
the output side of the drive, and repair problems.
The output terminal screws of the drive
are loose.
Tighten the terminal screws to the correct
tightening torque.
There is not balance between the three
phases of the PM motor impedance.
• 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.
The drive output circuit is broken. • 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.
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 Causes Possible Solutions
LSo Low Speed Motor Step-Out The motor code set incorrectly. • 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.
The load is too heavy. • Decrease the load.
• Replace the drive and motor with larger capacity
models.
An external force on the load side
caused the motor to move at start.
Find and repair problems on the load side that
cause the motor to rotate from the load side.
The drive incorrectly detected the motor
magnetic pole position.
• 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].
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].
Increase the values set in L8-93 to L8-95.
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. Decrease the values set in L8-93 to L8-95 to a range in which the drive does not malfunction to quickly detect motor reversal.
Code Name Causes Possible Solutions
nSE Node Setup Error 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.
Stop the drive when the Node Setup function is in
use.
Note:
Do a Fault Reset to clear the fault.
To Next Page
Loading...
