YASKAWA Z1000 User Manual page 205

Digital Operator Display
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
A single-phase motor is being used
Digital Operator Display
Cause
Phase loss has occurred on the output side of
the drive
Terminal wires are loose on the output side of
the drive
The output circuit is damaged
Motor impedance or motor phases are uneven
YASKAWA TOEP YAIZ1U 03B YASKAWA AC Drive – Z1000 User Manual
Output Phase Loss
LF
• Phase loss on the output side of the drive.
• Setting L8-07 to 1 or 2 enables Phase Loss Detection.
• Check for wiring errors and properly connect the output cable.
• 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.
Wire Gauges and Tightening Torque on page 81
Check the drive selection 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.
The drive cannot operate a single phase motor.
Output Current Imbalance
LF2
One or more of the phases in the output current are lost.
• Check for faulty wiring or poor connections on the output side of the drive.
• Correct the wiring.
Apply the tightening torque specified in this manual to fasten the terminals.
Gauges and Tightening Torque on page 81
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.
• Measure the line-to-line resistance for each motor phase. Ensure all values match.
• Replace the motor.
Fault Name
Possible Solution
for details.
Fault Name
Possible Solution
for details.
5.4 Fault Detection
Refer to Main Circuit
Refer to Main Circuit Wire
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