YASKAWA V1000 Technical Manual page 257

LED Operator Display
Cause
Parameters are not set appropriately.
Wiring for PID feedback is incorrect.
There is a problem with the feedback sensor.
LED Operator Display
Cause
Parameters are not set appropriately.
Wiring for PID feedback is incorrect.
There is a problem with the feedback sensor. Check the sensor on the controller side. If damaged, replace the sensor.
LED Operator Display
Cause
Motor insulation is damaged.
A damaged motor cable is creating a short
circuit.
The leakage current at the drive output is too
high.
The drive started to run during Current Offset
Fault or while coasting to a stop.
Hardware problem.
LED Operator Display
Cause
The output cable is disconnected.
The motor winding is damaged.
The output terminal is loose.
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.
LED Operator Display
Cause
Phase loss has occurred on the output side of
the drive.
YASKAWA ELECTRIC SIEP C710606 16C YASKAWA AC Drive – V1000 Technical Manual
Excessive PID Feedback
FbH
PID feedback input is greater than the level set b5-36 for longer than the time set to b5-37. To enable
fault detection, set b5-12 = "2" or "5".
Check the settings of parameters b5-36 and b5-37.
Correct the wiring.
• Check the sensor on the control side.
• Replace the sensor if damaged.
PID Feedback Loss
This fault occurs when PID Feedback Loss Detection is programmed to fault (b5-12 = 2) and the PID
FbL
Feedback < PID Feedback Loss Detection Level (b5-13) for the PID Feedback Loss Detection Time
(b5-14).
Check the settings of parameters b5-13 and b5-14.
Correct the wiring.
Ground Fault
• Current shorted to ground exceeded 50% of rated current on output side of the drive.
GF
• Setting L8-09 to 1 enables ground fault detection in models 2A0020 to 2A0069 and 4A0011 to
4A0038.
• 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 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 PM OLV.
• Replace the drive.
Output Phase Loss
LF
• Phase loss on the output side of the drive.
• Phase Loss Detection is enabled when L8-07 is set to "1" or "2".
• Check for wiring errors and ensure the output cable is connected properly.
• 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.
Torque Specifications on page
Check the drive and motor capacities.
Replace the drive.
The drive being used 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.
Fault Name
Possible Solution
Fault Name
Possible Solution
Fault Name
Possible Solution
Fault Name
Possible Solution
64.
Fault Name
Possible Solution
6.4 Fault Detection
.
Refer to Wire Size and
257
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