Troubleshooting
2
2.4 Fault
YASKAWA TOEPYAIGA8001B GA800 Drive Maintenance & Troubleshooting 93
Code Name Causes Possible Solutions
EF7 External Fault (Terminal S7)
MFDI terminal S7 caused an external fault through an
external device.
1. Find the device that caused the external fault and remove the
cause.
2. Clear the external fault input in the MFDI.
The wiring is incorrect. Correctly connect the signal line to MFDI terminal S7.
External Fault [H1-07 = 20 to 2B] is set to MFDI
terminal S7, but the terminal is not in use.
Correctly set the MFDI.
Note:
Do a Fault Reset to clear the fault.
Code Name Causes Possible Solutions
EF8 External Fault (Terminal S8)
MFDI terminal S8 caused an external fault through an
external device.
1. Find the device that caused the external fault and remove the
cause.
2. Clear the external fault input in the MFDI.
The wiring is incorrect. Correctly connect the signal line to MFDI terminal S8.
External Fault [H1-08 = 20 to 2B] is set to MFDI
terminal S8, but the terminal is not in use.
Correctly set the MFDI.
Note:
Do a Fault Reset to clear the fault.
Code Name Causes Possible Solutions
Err EEPROM Write Error
There was a problem with the EEPROM hardware. • 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.
Electrical interference corrupted the data while it was
writing to the EEPROM of the drive.
• Push ENTER Key.
• Set the parameters again.
Note:
Do a Fault Reset to clear the fault.
Code Name Causes Possible Solutions
FAn Internal Fan Fault
The circulation fan stopped operating correctly. • Examine circulation fan operation.
• Re-energize the drive.
• Examine U4-03 [Cooling Fan Ope Time] and U4-04 [Cool Fan
Maintenance]. If there is damage to the circulation fan or if the
performance life of the fan is expired, replace the fan.
Note:
Do a Fault Reset to clear the fault.
Code Name Causes Possible Solutions
FAn1 Drive Cooling Fan Fault
The cooling fan stopped operating correctly. • 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.
The circulation fan is damaged. • Examine circulation fan operation.
• Re-energize the drive.
• Examine U4-03 [Cooling Fan Ope Time] and U4-04 [Cool Fan
Maintenance]. If there is damage to the circulation fan or if the
performance life of the fan is expired, replace the fan.
Note:
Do a Fault Reset to clear the fault.
Code Name Causes Possible Solutions
FbH Excessive PID Feedback
The FbH detection level is set incorrectly. Adjust b5-36 [PID High Feedback Detection Lvl] and b5-37 [PID
High Feedback Detection Time].
There is a problem with the PID feedback wiring. Correct errors with the PID control wiring.
The feedback sensor is not operating correctly. Examine the sensors on the control device side.
A fault occurred in the feedback input circuit of the
drive.
Replace the control board or the drive. For information about
replacing the control board, contact Yaskawa or your nearest sales
representative.
Note:
• The drive detects this fault if the PID feedback input is more than the level set in b5-36 for longer than b5-37.
• Do a Fault Reset to clear the fault.
• If the drive detects this fault, it will operate the motor as specified by the stop method set in b5-12 [Feedback Loss Detection Select].
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