13 Troubleshooting
YASKAWA TOEPC71061723A YASKAWA AC Drive CR700 Quick Start Guide 69
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.
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.
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.
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 assigned to
MFDI terminal S5 that is not in use.
Correctly set the MFDI.
EF6 External Fault (terminal S6)
MFDI terminal S6 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 S6.
External fault [H1-06 = 2C to 2F] is assigned to
MFDI terminal S6 that is not in use.
Correctly set the MFDI.
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 = 2C to 2F] is assigned to
MFDI terminal S7 that is not in use.
Correctly set the MFDI.
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 = 2C to 2F] is assigned to
MFDI terminal S8 that is not in use.
Correctly set the MFDI.
EF9 External Fault (Terminal S9)
MFDI terminal S9 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 S9.
External fault [H1-09 = 2C to 2F]is set to MFDI
terminal S9, but the terminal is not in use.
Correctly set the MFDI.
EF10 External Fault (Terminal S10)
MFDI terminal S10 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 S10.
External fault [H1-10 = 2C to 2F] is set to MFDI
terminal S10, but the terminal is not in use.
Correctly set the MFDI.
EP24v External Power 24V Supply
The voltage of the main circuit power supply
decreased, and the 24 V power supply is supplying
power to the drive.
• Examine the main circuit power supply.
• Turn ON the main circuit power supply to run the drive.
FAn Internal Fan Fault
The circulation fan has malfunctioned. • Examine circulation fan operation.
• Re-energize the drive and check if the fault still remains.
• Examine U4-03 [Cooling Fan Ope Time] and U4-04 [Cool
Fan Maintenance]. If the performance life of the circulation
fan is expired or if there is damage to the fan, replace the fan.
EN
To Next Page
Loading...
