YASKAWA FSDrive-MV1000 Series Instructions For Use Manual page 149

Digital Operator Display
CF
Cause
Motor parameters are set improperly.
Torque limit is set too low.
Load inertia is too big.
The connection between motor and drive is
improper.
The line-to-line resistance has not been tuned.
The stopping method setting is not appropriate.
A Run command was issued in the coast to stop
state.
Digital Operator Display
CFA
nn COF
Cause
Cell control board fault
Current detection circuit fault
Digital Operator Display
CFA
nn CUV
Cause
The Power Cell input voltage is incorrect.
The Power Cell input power fuse has blown.
Cell control board fault
Digital Operator Display
CFA
nn FU
Cause
The Power Cell input power fuse has blown.
Phase loss for the input voltage of Power Cell
(secondary transformer)
Phase loss for the power supply of the
medium-voltage main circuit (primary
transformer)
Cell control board fault or voltage detection
board fault
Digital Operator Display
CFA
nn IGBT_FLT
Cause
Power Cell fault
The motor has been damaged due to overheating
or the motor insulation is damaged.
One of the motor cables has short circuited or
there is a grounding problem.
YASKAWA ELECTRIC TOEP C710687 02B FSDrive-MV1000 Instructions
Control Fault
The torque limit was reached continuously for three seconds or longer while ramping to stop in
Open Loop Vector Control.
Check the motor parameter settings and repeat Auto-Tuning.
Set the torque limit to an appropriate value using parameters L7-01 to L7-04.
• Adjust the deceleration time (C1-02, C1-04, C1-06, C1-08).
• Set the frequency to the minimum value and interrupt the Run command when the drive
finishes decelerating.
• Check for faulty wiring.
• Correct the wiring.
Perform line-to-line resistance Auto-Tuning.
The Run command fails to decelerate to a stop or is applied to unwanted machine.
• The Stop command is issued after the motor stopped.
• Enable Speed Search at start by setting b3-01 to 1.
Current Offset Fault
The current offset value at the current detection circuit exceeded the fault detection level.
Replace the cell control board.
Replace the current detection circuit.
Undervoltage
The P side or N side voltage in the DC bus has fallen below the low voltage detection level.
Correct the Power Cell input voltage.
Replace the Power Cell input power fuse.
Replace the cell control board.
Fuse Blowout
The P side or N side voltage in the DC bus has fallen below the low voltage detection level.
Replace the Power Cell input power fuse.
Replace the cell control board.
Check the wiring of the input terminal for the main circuit of the panel.
Replace the cell control board or voltage detection board.
IGBT Fault
An IGBT fault has been detected.
Replace the Power Cell.
• Check the insulation resistance of the motor.
• Replace the motor.
• Check the motor cable.
• Remove the short circuit.
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5.4 Fault Detection
5
149