YASKAWA GA50U Series

13 Troubleshooting
90 YASKAWA TOEPC71061752B GA500 Drive Installation & Primary Operation
Code Name Causes Possible Solutions
The option is incorrectly installed
to the drive.
Correctly install the option to the drive.
The option is damaged. If the fault continues and the wiring is
correct, replace the option.
CE
Modbus
Communication Error
The communications cable wiring
is incorrect.
Correct wiring errors.
There is a short circuit in the
communications cable or the
communications cable is not
connected.
• Repair short circuits and connect cables.
• Replace the defective communications
cable.
Electrical interference caused a
communication data error.
• Examine the control circuit lines, main
circuit lines, and ground wiring, and
decrease the effects of electrical
interference.
• Make sure that a magnetic contactor is
not the source of the electrical
interference, then use a Surge Protective
Device if necessary.
• Use only the recommended cables or
other shielded line. Ground the shield on
the controller side or the drive input
power side.
• Separate the communication wiring from
drive power lines, and install a noise
filter to the input side of the power
supply for communication.
• Decrease the effects of electrical
interference from the controller.
CF Control Fault
Motor parameters are set
incorrectly
Correctly set the motor parameters and do
Auto-Tuning again.
The torque limit setting is too low. Adjust L7-01 to L7-04 [Torque Limit].
The load inertia is too large. • Adjust C1-02, C1-04, C1-06, and C1-08
[Deceleration Times].
• Set the frequency reference to the
minimum output frequency, and stop the
Run command when the drive stops
deceleration.
The drive is trying to ramp to stop
a machine that cannot do ramp to
stop or on a machine for which
deceleration is not necessary.
Correctly set b1-03 [Stopping Method
Selection].
The motor and drive are connected
incorrectly.
Correct wiring errors.
Line-to-line Resistance Tuning is
not done.
Do Stationary Auto-Tuning for Line-to-Line
Resistance.
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].