YASKAWA FSDrive-MV1000 Instructions Manual page 119

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's input power fuse has blown. ⇒Replace the Power Cell's input power fuse.
Cell control board fault
Digital Operator Display
CFA
nn FU
Cause
The Power Cell's input power fuse has blown. ⇒Replace the Power Cell's input power fuse.
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)
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 shorted out or
there is a grounding problem.
Digital Operator Display
CFA
nn OC
Cause
Load is too heavy.
Insulation of the motor or the cable is
conducting electricity.
The output side cable wiring is wrong.
The acceleration and deceleration times are
too short.
The PG is not mounted correctly.
PG cable is disconnected.
PG cable wiring is wrong.
The PG settings are incorrect.
The motor parameters are not set correctly.
YASKAWA ELECTRIC EZZ010928 FSDrive-MV1000 Instructions
Current Offset Fault
The current offset value at the current detection circuit has 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 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 cell control board.
⇒Check the wiring of the input terminal for the main circuit of the panel.
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.
Overcurrent
The output current has exceeded 132% of the cell's rated current.
⇒Reduce the load.
⇒Replace the motor or cable.
⇒Correct the wiring.
⇒Increase the acceleration and deceleration times.
⇒Mount the PG correctly.
⇒Reconnect the cable.
⇒Correct the wiring.
⇒Make correct PG settings.
⇒Set the motor parameters correctly.
Fault Name
Possible Solution
Fault Name
Possible Solution
Fault Name
Possible Solution
Fault Name
Possible Solution
Fault Name
Possible Solution
5.4 Fault Detection
5
119