Yaskawa 600V - Manual (Page 47)

HOA Keypad ALM FLT Cause Possible Solution
Drive Disabled
dnE
O
“Drive Enable” is set to a multi-function contact
input (H1-oo = 6A) and that signal was
switched off.
Check the operation sequence.
Option External Fault
EF0
O O
An external fault was received from the PLC and
F6-03 is set to a value other than 3.
• Remove the cause of the external fault.
• Remove the external fault input from the PLC.
Problem with the PLC program Check the PLC program and correct problems.
External Fault
EF1 to EF7
O O
An external device tripped an alarm function Remove the cause of the external fault and reset the fault.
Multi-function contact input setting is incorrect
• Check for unused terminals set for H1-oo = 20 to 2B
(External Fault).
• Change the terminal settings.
EEPROM Write Error
Err
O
Noise has corrupted data while writing to the
EEPROM
• Press “ENTER” on the HOA keypad.
• Correct the parameter setting.
• Cycle power to the drive.
• 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.
Internal Fan Fault
FAn
O O Internal cooling fan has malfunctioned
• Cycle power to the drive.
• Check for fan operation.
• Verify the cumulative operation time of the fan with monitor
U4-03, and verify the cumulative operation time of the fan
maintenance timer with U4-04.
• If the cooling fan has exceeded its expected performance life
or is damaged in any other way, replace the fan.
Excessive PID
Feedback
FbH
O O
Parameters are set inappropriately Check b5-36 and b5-37 settings.
Incorrect PID feedback wiring Correct the wiring.
PID Feedback Loss
FbL
O O
Parameters are set inappropriately Check b5-13 and b5-14 settings.
Incorrect PID feedback wiring Correct the wiring.
Ground Fault
GF
O
Motor insulation is damaged
• Check the insulation resistance of the motor.
• Replace the motor.
A damaged motor cable is creating a short circuit
• 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.
Excessive leakage current at the drive output
• Reduce the carrier frequency.
• Reduce the amount of stray capacitance.
Output Phase Loss
LF
O
The output cable is disconnected
• Check for wiring errors and properly connect the output
cable.
• Correct the wiring.
The motor winding is damaged
• Check the resistance between motor lines.
• Replace the motor if the winding is damaged.
Output Current
Imbalance
LF2
O
Phase loss has occurred on the output side of the
drive
• Check for faulty wiring or poor connections on the output
side of the drive.
• Correct the wiring.
Motor impedance or motor phases are uneven
• Measure the line-to-line resistance for each motor phase.
Ensure all values match.
• Replace the motor.
Cooling Fan
Maintenance Time
LT-1
O
The cooling fan has reached 90% of its expected
performance life.
Replace the cooling fan and set o4-03 to 0 to reset the
Maintenance Monitor.
i.8 Troubleshooting
YASKAWA ELECTRIC TOEP YAIZ1U 02A YASKAWA AC Drive – Z1000 Safety Precautions 47