YASKAWA AC Drive-A1000 Technical Manual page 305

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
Digital Operator Display
Cause
Motor insulation is damaged
A damaged motor cable is creating a short
circuit
Excessive leakage current at the drive output
The drive started to run during a current offset
fault or while coasting to a stop
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
Digital Operator Display
Cause
Phase loss has occurred on the output side of
the drive
Terminal wires on the output side of the drive
are loose
YASKAWA ELECTRIC SIEP C710616 31B YASKAWA AC Drive – A1000 Technical Manual
• Check the sensor on the control side.
• Replace the sensor if damaged.
PID Feedback Loss
FbL
This fault occurs when PID feedback loss detection is programmed to trigger a fault (b5-12 = 2) and the
PID feedback level 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.
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 in models 5.5 kW or larger.
• Check the insulation resistance of the motor.
• Replace the motor.
• Check the motor cable.
• Remove the short circuit and turn the power back on.
• Check the resistance between the cable and the ground terminal
• Replace the cable.
• Reduce the carrier frequency.
• Reduce the amount of stray capacitance.
• The value set exceeds the allowable setting range while the drive automatically adjusts the current offset
(this happens only when attempting to restart a PM motor that is coasting to stop).
• Enable Speed Search at start (b3-01 = 1).
• Perform Speed Search 1 or 2 (H1-oo = 61 or 62) via one of the external terminals.
Note: Speed Search 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.
and Tightening Torque on page
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.
The drive cannot operate a single phase motor.
Output current imbalance
LF2
One or more of the phases in the output current is 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.
Tightening Torque on page
Fault Name
Possible Solution
Fault Name
Possible Solution
Fault Name
Possible Solution
58.
Fault Name
Possible Solution
58.
6.4 Fault Detection
.
Refer to Wire Gauges
Refer to Wire Gauges and
305
6