YASKAWA FSDrive-MV1000 Series Instructions For Use Manual page 154

5.4 Fault Detection
Digital Operator Display
FbL
Cause
Parameters are set inappropriately.
Incorrect PID feedback wiring
There is a problem with the feedback sensor.
Digital Operator Display
GF
Cause
The motor has been damaged from overheating
or the motor insulation is damaged.
A damaged motor cable is creating a short circuit
or there is a grounding problem.
Large stray capacitance of cable and
Hardware problem
Digital Operator Display
IOV
Cause
Excessive rise of the power supply voltage
Digital Operator Display
IUV
Cause
There is a problem with the voltage from the
drive power.
The power has been interrupted.
Digital Operator Display
LF
Cause
The output cable is disconnected.
The motor winding is damaged.
The output terminal is loose.
The rated current of the motor being used is less
than 5% of the drive rated current.
An output transistor is damaged.
154
PID Feedback Loss
PID feedback loss detection is programmed to trigger a fault (b5-12 = 2) and the PID feedback
input is below the detection level set to b5-13 for longer than the time set to b5-14.
Check the settings of parameters b5-13 and b5-14.
• Check for faulty wiring.
• Correct the wiring.
• Check the sensor on the controller side.
• Replace the sensor if damaged.
Ground Fault
A current short to ground exceeded 50% of rated current on the output side of the drive
(Set L8-09 to 1 to enable ground fault detection.).
• Check the insulation resistance of the motor.
• Replace the motor.
• Check the motor cable.
• Remove the short circuit and reapply power to the drive.
• Check the resistance between the motor cables and the ground terminal
Replace the cable.
• Decrease the carrier frequency if the cable length exceeds 100 m.
terminal
• Reduce the amount of stray capacitance.
If the problem continues, replace the control board or the entire drive. Contact Yaskawa or a
Yaskawa representative for instructions on replacing the control board.
Input Overvoltage
The main circuit power supply voltage has exceeded the setting in L2-41 in longer than the time
set to L2-42.
• Check if the power supply is appropriate.
• Adjust the power supply voltage of the main circuit (for example, changing the taps of the
transformer).
• Set L2-41 to the appropriate value.
• If detection is faulty, replace the isolation board, which detects the power supply voltage of the
main circuit, or the control board. Contact Yaskawa or a Yaskawa representative for
instructions on replacing the control board.
Power Supply Undervoltage
Power voltage has dropped for all Power Cell's during drive operation (voltage output).
• Check the voltage.
• Correct the voltage to be within the range listed in drive input power specifications.
Correct the drive input power.
Output Phase Loss
Phase loss on the output side of the drive.
Set L8-07 to 1 or 2 to enable Phase Loss Detection.
• Check for wiring errors and ensure the output cable is connected properly.
• Correct the wiring.
• Check the resistance between motor lines.
• Replace the motor if the winding is damaged.
• Apply the tightening torque specified in this manual to fasten the terminals.
Retighten the terminals to the tightening torques specified in this manual.
and Tightening Torques on page 91
Check the drive and motor capacities.
If the problem continues, replace the control board or the entire drive. Contact Yaskawa or a
Yaskawa representative for instructions on replacing the control board.
Fault Name
Possible Solutions
Fault Name
Possible Solutions
Fault Name
Possible Solutions
Fault Name
Possible Solutions
Fault Name
Possible Solutions
for details.
YASKAWA ELECTRIC TOEP C710687 02B FSDrive-MV1000 Instructions
.
Refer to Wire Gauges