
Digital Operator Display
Fault Name
EF4
External Fault (input terminal S4)
External fault at multi-function input terminal S4.
EF5
External Fault (input terminal S5)
External fault at multi-function input terminal S5.
EF6
External Fault (input terminal S6)
External fault at multi-function input terminal S6.
EF7
External Fault (input terminal S7)
External fault at multi-function input terminal S7
Cause
Possible Solution
An external device has tripped an alarm
function.
Remove the cause of the external fault and reset the fault.
Wiring is incorrect.
• Ensure the signal lines have been connected properly to the terminals assigned for external fault
detection (H1-
oo
= 20 to 2F).
• Reconnect the signal line.
Incorrect setting of multi-function contact
inputs.
• Check if the unused terminals set for H1-
oo
= 20 to 2F (External Fault).
• Change the terminal settings.
Digital Operator Display
Fault Name
Err
EEPROM Write Error
Data does not match the EEPROM being written to.
Cause
Possible Solution
-
• Press the ENTER button.
• Correct the parameter settings.
• Cycle power to the drive.
Refer to Diagnosing and Resetting Faults on page 298
.
Digital Operator Display
Fault Name
FbH
Excessive PID Feedback
PID feedback input is greater than the level set b5-36 for longer than the time set to b5-37. Set b5-12 to
2 or 5 to enable fault detection.
Cause
Possible Solution
Parameters are not set appropriately.
Check the settings of parameters b5-36 and b5-37.
Wiring for PID feedback is incorrect.
Correct the wiring.
There is a problem with the feedback sensor.
• Check the sensor on the control side.
• Replace the sensor if damaged.
Digital Operator Display
Fault Name
FbL
PID Feedback Loss
This fault occurs when PID Feedback Loss Detection is programmed to fault (b5-12 = 2) and the PID
Feedback < PID Feedback Loss Detection Level (b5-13) for the PID Feedback Loss Detection Time
(b5-14).
Cause
Possible Solution
Parameters are not set appropriately.
Check the settings of parameters b5-13 and b5-14.
Wiring for PID feedback is incorrect.
Correct the wiring.
There is a problem with the feedback sensor. Check the sensor on the controller side. If damaged, replace the sensor.
Digital Operator Display
Fault Name
GF
Ground Fault
• Current shorted to ground exceeded 50% of rated current on output side of the drive.
• Setting L8-09 to 1 enables ground fault detection in models 2A0020 to 2A0069 and 4A0011 to 4A0038.
Cause
Possible Solution
Motor insulation is damaged.
• Check the insulation resistance of the motor.
• Replace the motor.
6.4 Fault Detection
YASKAWA ELECTRIC SIEP C710606 18F YASKAWA AC Drive – V1000 Technical Manual
271
6
Troubleshooting