6.4 Fault Detection
246
YASKAWA ELECTRIC
SIEP C710606 44B YASKAWA AC Drive T1000V Technical Manual
LED Operator Display
Fault Name
EF0
Option Card External Fault
An external fault condition is present.
Cause
Possible Solution
An external fault was received from the
PLC with other than F6-03 = 3 “alarm only”
(the drive continued to run after external
fault).
• Remove the cause of the external fault.
• Remove the external fault input from the PLC.
Problem with the PLC program.
Check the PLC program and correct problems.
LED Operator Display
Fault Name
EF1
External Fault (input terminal S1)
External fault at multi-function input terminal S1.
EF2
External Fault (input terminal S2)
External fault at multi-function input terminal S2.
EF3
External Fault (input terminal S3)
External fault at multi-function input terminal S3.
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.
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-
= 20 to 2F).
• Reconnect the signal line.
Incorrect setting of multi-function contact
inputs.
• Check if the unused terminals set for H1-
= 20 to 2F (External Fault).
• Change the terminal settings.
LED Operator Display
Fault Name
Err
EEPROM Write Error
Data does not match the EEPROM being written to.
Cause
Possible Solution
-
• Press the
button.
• Correct the parameter settings.
• Cycle power to the drive.
Refer to Diagnosing and Resetting Faults on page 269
.
LED 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. To enable
fault detection, set b5-12 = “2” or “5”.
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.
LED 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 Low 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.