YASKAWA A1000 Series Quick Start Manual page 184

5.2 Fault Detection
Digital Operator Display
Cause
Parameters are set inappropriately
Incorrect PID feedback wiring
There is a problem with the feedback sensor
Digital Operator Display
Cause
Parameters are set inappropriately
Incorrect PID feedback wiring
There is a problem with the feedback sensor
Cause
Motor insulation is damaged
A damaged motor cable is creating a short
circuit
Excessive leakage current at the drive output
The drive performed a current offset
adjustment while the motor was rotating
Hardware problem
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
184
Excessive PID Feedback
FbH
PID feedback input is greater than the level set to b5-36 for longer than the time set to b5-37. Set b5-12
to 2 or 5 to enable fault detection.
Check b5-36 and b5-37 settings.
Correct the wiring.
• Check the sensor on the control side.
• Replace the sensor if damaged.
PID Feedback Loss
FbL
PID feedback loss detection is programmed to trigger a fault (b5-12 = 2 or 5) and the PID feedback level
is below the detection level set to b5-13 for longer than the time set to b5-14.
Check b5-13 and b5-14 settings.
Correct the wiring.
• Check the sensor on the control side.
• Replace the sensor if damaged.
Ground Fault
GF
• A current short to ground exceeded 50% of rated current on the output side of the drive.
• Setting L8-09 to 1 enables 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 cable and the ground terminal
• Replace the cable.
• Reduce the carrier frequency.
• Reduce the amount of stray capacitance.
• The set value exceeds the allowable setting range while the drive automatically adjusts the current
offset. This generally only happens when attempting to restart a PM motor that is coasting to stop.
• Set b3-01 to 1 to enable Speed Search at Start.
• Perform Speed Search 1 or 2 (H1-oo = 61 or 62) via one of the external terminals.
Note: Speed Searches 1 and 2 are the same when using OLV/PM.
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.
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 Torques on page 94
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.
Fault Name
Possible Solution
Fault Name
Possible Solution
Possible Solution
Fault Name
Possible Solution
YASKAWA ELECTRIC TOEP C710616 41G YASKAWA AC Drive - A1000 Quick Start Guide
.
Refer to Main Circuit
for details.