7.5 Minor Faults/Alarms
280 YASKAWA SIEPC71061753C GA500 Technical Manual
Code Name Causes Possible Solutions
EF
FWD/REV Run Command Input
Error
A forward command and a reverse command were
input at the same time for longer than 0.5 s.
Examine the forward and reverse command sequence and correct
the problem.
Note:
• If the drive detects EF, the motor will ramp to stop.
• If the drive detects this error, the terminal assigned to H2-01 to H2-03 = 10 [MFDO Function Select = Alarm] will be ON.
Code Name Causes Possible Solutions
EF0 Option Card External Fault
The communication option card received an
external fault from the controller.
1. Find the device that caused the external fault and remove the
caus.
2. Clear the external fault input from the controller.
A programming error occurred on the controller
side.
Examine the operation of the controller program.
Note:
• The drive detects this error if the alarm function on the external device side is operating.
• If the drive detects this error, the terminal set to H2-01 to H2-03 = 10 [MFDO Function Selection = Alarm] will activate.
• If the drive detects this error, it will operate the motor as specified by the stopping method set in F6-03 [Comm External Fault (EF0) Select].
Code Name Causes Possible Solutions
EF1 External Fault (Terminal S1)
MFDI terminal S1 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 S1.
External Fault [H1-01 = 2C to 2F] is set to MFDI
terminal S1, but the terminal is not in use.
Correctly set the MFDI.
Note:
If the drive detects this error, the terminal assigned to H2-01 to H2-03 = 10 [MFDO Function Select = Alarm] will activate.
Code Name Causes Possible Solutions
EF2 External Fault (Terminal S2)
MFDI terminal S2 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 S2.
External Fault [H1-02 = 2C to 2F] is set to MFDI
terminal S2, but the terminal is not in use.
Correctly set the MFDI.
Note:
If the drive detects this error, the terminal assigned to H2-01 to H2-03 = 10 [MFDO Function Select = Alarm] will activate.
Code Name Causes Possible Solutions
EF3 External Fault (Terminal S3)
MFDI terminal S3 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 S3.
External Fault [H1-03 = 2C to 2F] is set to MFDI
terminal S3, but the terminal is not in use.
Correctly set the MFDI.
Note:
If the drive detects this error, the terminal assigned to H2-01 to H2-03 = 10 [MFDO Function Select = Alarm] will activate.
Code Name Causes Possible Solutions
EF4 External Fault (Terminal S4)
MFDI terminal S4 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 S4.
External Fault [H1-04 = 2C to 2F] is set to MFDI
terminal S4, but the terminal is not in use.
Correctly set the MFDI.
Note:
If the drive detects this error, the terminal assigned to H2-01 to H2-03 = 10 [MFDO Function Select = Alarm] will activate.
Code Name Causes Possible Solutions
EF5 External Fault (Terminal S5)
MFDI terminal S5 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 S5.
External Fault [H1-05 = 2C to 2F] is set to MFDI
terminal S5, but the terminal is not in use.
Correctly set the MFDI.
Note:
If the drive detects this error, the terminal assigned to H2-01 to H2-03 = 10 [MFDO Function Select = Alarm] will activate.
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