YASKAWA GA50U Series - Page 97

13 Troubleshooting
YASKAWA TOEPC71061752B GA500 Drive Installation & Primary Operation 97
Code Name Causes Possible Solutions
The acceleration time is too short. • Calculate the torque necessary during
acceleration related to the load inertia
and the specified acceleration time.
• Increase the values set in C1-01, C1-03,
C1-05, or C1-07 [Acceleration Times] to
get the necessary torque.
• Increase the values set in C2-01 to C2-04
[S-Curve Characteristics] to get the
necessary torque.
• Replace the drive with a larger capacity
model.
The drive is trying to operate a
specialized motor or a motor that
is larger than the maximum
applicable motor output of the
drive.
• Examine the motor nameplate, the motor,
and the drive to make sure that the drive
rated current is larger than the motor
rated current.
• Replace the drive with a larger capacity
model.
A magnetic contactor was
switched at the output.
Set the operation sequence to not turn ON or
OFF the magnetic contactor while the drive
is outputting voltage.
The V/f pattern settings are
incorrect.
• Examine the ratios between the V/f
pattern frequency and voltage. Decrease
the voltage if it is too high compared to
the frequency.
• Adjust E1-04 to E1-10 [V/f Pattern
Parameters]. For motor 2, adjust E3-04
to E3-10.
The torque compensation gain is
too large.
Decrease the value set in C4-01 [Torque
Compensation Gain] to make sure that the
motor does not stall.
Electrical interference caused a
problem.
Examine the control circuit lines, main
circuit lines, and ground wiring, and
decrease the effects of electrical
interference.
The gain during overexcitation
operation is too large.
• Find the time when the fault occurs.
• If the fault occurs at the same time as an
overexcitation operation, decrease n3-13
[OverexcitationBraking (OEB) Gain]
and consider the motor flux saturation.
The drive received a Run
command while the motor was
coasting.
• Examine the sequence and input the Run
command after the motor fully stops.
• Set b3-01 = 1 [Speed Search at Start
Selection = Enabled] or set H1-xx = 61,
62 [Speed Search from Fmax or Fref] to
input speed search commands from the
MFDI terminals.
In PM Control Methods, the
setting of the motor code is
incorrect.
• Enter the correct motor code to E5-01
[PM Motor Code Selection] as specified
by the PM motor.
• For specialized motors, refer to the motor
test report and set E5-xx [PM Motor
Settings] correctly.