Digital Operator Display Minor Fault Name
EF
Forward/Reverse Run Command Input Error
Both forward run and reverse run closed simultaneously for longer than 0.5 s.
Cause Possible Solutions
Sequence error
Check the forward and reverse command sequence and correct the problem.
Note: When minor fault EF detected, motor ramps to stop.
Digital Operator Display Minor Fault Name
EF0
Option Card External Fault
An external fault condition is present.
Cause Possible Solutions
An external fault was received from the
PLC with F6-03 set to 3, which allows the
drive to continue running after an external
fault occurs.
• Remove the cause of the external fault.
•
Remove the external fault input from the PLC.
There is a problem with the PLC program. Check the PLC program and correct problems.
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.
EF7
External fault (input terminal S7)
External fault at multi-function input terminal S7.
EF8
External fault (input terminal S8)
External fault at multi-function input terminal S8.
FAn
Internal Fan Fault
Fan or magnetic contactor failure (detected when L8-32 = 3 or 4)
Cause Possible Solution
Internal cooling fan has malfunctioned
• Cycle power to the drive.
•
Check for fan operation.
• Verify the cumulative operation time of the fan with monitor U4-03, and verify the cumulative operation
time of the fan maintenance timer with U4-04.
• If the cooling fan has exceeded its expected performance life or is damaged in any other way, replace the
fan.
Fault detected in the internal cooling fan or
magnetic contactor to the power supply.
• Cycle power to the drive.
• If the fault continues to occur, replace the power board/gate drive board or the entire drive.
• Contact Yaskawa or a Yaskawa representative for instructions on replacing the power board/gate drive
board.
Digital Operator Display Minor Fault Name
FbH
Excessive PID Feedback
The PID feedback input is higher than the level set to b5-36 for longer than the time set to b5-37, and b5-12
is set to 1 or 4.
Cause Possible Solutions
Parameter settings for b5-36 and b5-37 are
incorrect.
Check parameters b5-36 and b5-37.
PID feedback wiring is faulty. Correct the wiring.
5.3 Alarm Detection
198
YASKAWA ELECTRIC TOEP C710616 41G YASKAWA AC Drive - A1000 Quick Start Guide
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