YASKAWA CR700

Troubleshooting
6
6.4 Fault
YASKAWA SIEPC71061723A YASKAWA AC Drive CR700 Technical Manual 343
Code Name Causes Possible Solutions
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.
Note:
• The drive detects this error if it does not correctly receive control data for the CE detection time set to H5-09 [CE Detection Time].
• Do a Fault Reset to clear the fault.
• If the drive detects this error, the drive will operate the motor as specified by the stopping method set in H5-04 [Communication Error Stop Method].
Code Name Causes Possible Solutions
CF Control Fault
Motor parameters are set improperly. Correctly set the motor parameters and do Auto-Tuning again.
The torque limit is too low. Adjust L7-01 to L7-04 [Torque Limit].
The load inertia is too big. • 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.
Reevaluate the sequence to ensure that the Run command is input
after the motor has come to a complete stop.
Note:
• The drive detects this error if the torque reference is more than the torque limit for 3 seconds or longer while the drive ramps to stop.
• Do a Fault Reset to clear the fault.
Code Name Causes Possible Solutions
CnT1 Number of Driving Over
U4-53 [Num of Driv 1 (Low)] or U4-54 [Num of
Driv 1 (High)] is more than the setting value of S2-
13 [Motor1 Number of Driving Limit].
1. Adjust S2-09 [Motor1 Number of Driving start] so that the
number of motor 1 operation starts does not trigger the output
of the warning.
2. Input the fault reset signal.
Note:
• Do a Fault Reset to clear the fault.
• The operation of the drive when this fault is detected is determined by S2-12 [MentenanceTimer Output Selection].
Code Name Causes Possible Solutions
CnT2 Number of Driving Over
U4-55 [Num of Driv 2 (Low)] or U4-56 [Num of
Driv 2 (High)] is more than the setting value of S2-
14 [Motor2 Number of Driving Limit].
1. Adjust S2-10 [Motor2 Number of Driving start] so that the
number of motor 2 operation starts does not trigger the output
of the warning.
2. Input the fault reset signal.
Note:
• Do a Fault Reset to clear the fault.
• The operation of the drive when this fault is detected is determined by S2-12 [MentenanceTimer Output Selection].
Code Name Causes Possible Solutions
CnT3 Number of Driving Over
U4-57 [Num of Driv 3 (Low)] or U4-58 [Num of
Driv 3 (High)] is more than the setting value of S2-
15 [Motor3 Number of Driving Limit].
1. Adjust S2-11 [Motor3 Number of Driving start] so that the
number of motor 3 operation starts does not trigger the output
of the warning.
2. Input the fault reset signal.
Note:
• Do a Fault Reset to clear the fault.
• The operation of the drive when this fault is detected is determined by S2-12 [MentenanceTimer Output Selection].
Code Name Causes Possible Solutions
CoF Current Offset Fault
Drive starts operation while the induced voltage
remains in the motor (during coasting to a stop or
after rapid deceleration).
Specify a sequence in which operation is not restarted when
induced voltage remains in the motor.
A drive hardware problem occurred. Replace the drive.
Note:
• Detected if the current offset value exceeds the allowable setting range while the drive automatically adjusts the current offset.
• Perform Fault Reset to clear the fault.