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20 Troubleshooting
Code
Name
EF2
External Fault (Terminal S2)
EF3
External Fault (Terminal S3)
EF4
External Fault (Terminal S4)
EF5
External Fault (Terminal S5)
EF6
External Fault (Terminal S6)
EF7
External Fault (Terminal S7)
EF8
External Fault (Terminal S8)
EP24v
External Power 24V Supply
FbH
Excessive PID Feedback
FbL
PID Feedback Loss
HCA
High Current Alarm
92
Causes
External Fault [H1-01 = 2C to 2F] is set to MFDI
terminal S1, but the terminal is not in use.
MFDI terminal S2 caused an external fault through an
external device.
The wiring is incorrect.
External Fault [H1-02 = 2C to 2F] is set to MFDI
terminal S2, but the terminal is not in use.
MFDI terminal S3 caused an external fault through an
external device.
The wiring is incorrect.
External Fault [H1-03 = 2C to 2F] is set to MFDI
terminal S3, but the terminal is not in use.
MFDI terminal S4 caused an external fault through an
external device.
The wiring is incorrect.
External Fault [H1-04 = 2C to 2F] is set to MFDI
terminal S4, but the terminal is not in use.
MFDI terminal S5 caused an external fault through an
external device.
The wiring is incorrect.
External Fault [H1-05 = 2C to 2F] is set to MFDI
terminal S5, but the terminal is not in use.
MFDI terminal S6 caused an external fault through an
external device.
The wiring is incorrect.
External Fault [H1-06 = 2C to 2F] is set to MFDI
terminal S6, but the terminal is not in use.
MFDI terminal S7 caused an external fault through an
external device.
The wiring is incorrect.
External Fault [H1-07 = 2C to 2F] is set to MFDI
terminal S7, but the terminal is not in use.
MFDI terminal S8 caused an external fault through an
external device.
The wiring is incorrect.
External Fault [H1-08 = 2C to 2F] is set to MFDI
terminal S8, but the terminal is not in use.
The voltage of the main circuit power supply
decreased, and the 24 V power supply is supplying
power to the drive.
The FbH detection level is set incorrectly.
There is a problem with the PID feedback wiring.
The feedback sensor is not operating correctly.
A fault occurred in the feedback input circuit of the
drive.
The FbL detection level is set incorrectly.
The load is too heavy.
YASKAWA TOEPC71061782C GA800 Drive Installation & Primary Operation
Possible Solutions
Correctly set the MFDI.
1.
Find the device that caused the external fault and remove the
cause.
2.
Clear the external fault input in the MFDI.
Correctly connect the signal line to MFDI terminal S2.
Correctly set the MFDI.
1.
Find the device that caused the external fault and remove the
cause.
2.
Clear the external fault input in the MFDI.
Correctly connect the signal line to MFDI terminal S3.
Correctly set the MFDI.
1.
Find the device that caused the external fault and remove the
cause.
2.
Clear the external fault input in the MFDI.
Correctly connect the signal line to MFDI terminal S4.
Correctly set the MFDI.
1.
Find the device that caused the external fault and remove the
cause.
2.
Clear the external fault input in the MFDI.
Correctly connect the signal line to MFDI terminal S5.
Correctly set the MFDI.
1.
Find the device that caused the external fault and remove the
cause.
2.
Clear the external fault input in the MFDI.
Correctly connect the signal line to MFDI terminal S6.
Correctly set the MFDI.
1.
Find the device that caused the external fault and remove the
cause.
2.
Clear the external fault input in the MFDI.
Correctly connect the signal line to MFDI terminal S7.
Correctly set the MFDI.
1.
Find the device that caused the external fault and remove the
cause.
2.
Clear the external fault input in the MFDI.
Correctly connect the signal line to MFDI terminal S8.
Correctly set the MFDI.
• Examine the main circuit power supply.
• Turn ON the main circuit power supply to run the drive.
Adjust b5-36 [PID High Feedback Detection Lvl] and b5-37 [PID
High Feedback Detection Time].
Correct errors with the PID control wiring.
Examine the sensors on the control device side.
Replace the control board or the drive. For information about
replacing the control board, contact Yaskawa or your nearest sales
representative.
Adjust b5-13 [PID Feedback Loss Detection Lvl] and b5-14 [PID
Feedback Loss Detection Time].
• Decrease the load for applications with repetitive starts and
stops.
• Replace the drive with a larger capacity model.
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