YASKAWA GA800 600 V Drive Installation & Primary Operation page 68

18 Troubleshooting
Code Name
EF6 External Fault (Terminal S6)
EF7 External Fault (Terminal S7)
EF8 External Fault (Terminal S8)
Err EEPROM Write Error
FAn1 Drive Cooling Fan Fault
FbH Excessive PID Feedback
FbL PID Feedback Loss
GF Ground Fault
LF Output Phase Loss
LF2 Output Current Imbalance
nSE Node Setup Error
oC Overcurrent
68
Causes
MFDI terminal S6 caused an external fault through an
external device.
MFDI terminal S7 caused an external fault through an
external device.
MFDI terminal S8 caused an external fault through an
external device.
There was a problem with the EEPROM hardware.
The cooling fan stopped operating correctly.
The FbH detection level is set incorrectly.
The FbL detection level is set incorrectly.
Overheating caused damage to the motor or the motor
insulation is not satisfactory.
The motor main circuit cable is contacting ground to
make a short circuit.
An increase in the stray capacitance of the cable and
the ground terminal caused an increase in the leakage
current.
There was a problem with the drive hardware.
The motor main circuit cable is disconnected.
Phase loss occurred in the wiring on the output side
of the drive.
The H1-xx = 47 [Node Setup (CANopen)] terminal
was activated during run.
The load is too large.
Overheating caused damage to the motor or the motor
insulation is not satisfactory.
The motor main circuit cable is contacting ground to
make a short circuit.
A short circuit or ground fault on the drive output
side caused damage to the output transistor of the
drive.
The acceleration time is too short.
YASKAWA TOEPC7106170VA GA800 600 V Drive Installation & Primary Operation
Possible Solutions
1. Find the device that caused the external fault and remove the
cause.
2. Clear the external fault input in the MFDI.
1. Find the device that caused the external fault and remove the
cause.
2. Clear the external fault input in the MFDI.
1. Find the device that caused the external fault and remove the
cause.
2. Clear the external fault input in the MFDI.
• Re-energize the drive.
• If the fault stays, replace the control board or the drive. Contact
Yaskawa or your nearest sales representative to replace the
board.
• Examine cooling fan operation.
• Re-energize the drive.
• Examine U4-03 [Cooling Fan Ope Time] and U4-04 [Cool Fan
Maintenance]. If the performance life of the cooling fan is
expired or if there is damage to the fan, replace the fan.
Adjust b5-36 [PID High Feedback Detection Lvl] and b5-37 [PID
High Feedback Detection Time].
Adjust b5-13 [PID Feedback Loss Detection Lvl] and b5-14 [PID
Feedback Loss Detection Time].
Measure the motor insulation resistance, and replace the motor if
there is electrical conduction or unserviceable insulation.
• Examine the motor main circuit cable for damage, and repair
short circuits.
• Measure the resistance between the motor main circuit cable and
the ground terminal. If there is electrical conduction, replace the
cable.
• If the wiring length of the cable is more than 100 m, decrease the
carrier frequency.
• Decrease the stray capacitance.
Replace the control board or the drive. For information about
replacing the control board, contact Yaskawa or your nearest sales
representative.
Connect motor main circuit cable wiring. Correct wiring errors in
the main circuit drive input power.
Examine for wiring errors or disconnected wires on the output side
of the drive, and repair problems.
Stop the drive when the Node Setup function is in use.
• Measure the current flowing into the motor.
• Replace the drive with a larger capacity model if the current
value is more than the drive rated current.
• Decrease the load or replace with a larger drive to prevent
sudden changes in the current level.
Measure the motor insulation resistance, and replace the motor if
there is electrical conduction or unserviceable insulation.
• Examine the motor main circuit cable for damage, and repair
short circuits.
• Measure the resistance between the motor main circuit cable and
the ground terminal. If there is electrical conduction, replace the
cable.
• Make sure that there is not a short circuit in terminal B1 and
terminals U/T1, V/T2, and W/T3. Make sure that there is not a
short circuit in terminals - and terminals U/T1, V/T2, and W/T3.
• If there is a short circuit, contact Yaskawa or your nearest sales
representative.
• Calculate the torque necessary during acceleration related to the
load inertia and the specified acceleration time.
• Increase the values set in C1-01, C1-03, C1-05, or C1-07
[Acceleration Times] to get the necessary torque.
• Increase the values set in C2-01 to C2-04 [S-Curve
Characteristics] to get the necessary torque.
• Replace the drive with a larger capacity model.