YASKAWA A1000 Series Quick Start Manual page 198

5.3 Alarm Detection
Digital Operator Display
Cause
Sequence error
Digital Operator Display
Cause
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.
There is a problem with the PLC program. Check the PLC program and correct problems.
Cause
Internal cooling fan has malfunctioned
Fault detected in the internal cooling fan or
magnetic contactor to the power supply.
Digital Operator Display
Cause
Parameter settings for b5-36 and b5-37 are
incorrect.
PID feedback wiring is faulty.
198
Forward/Reverse Run Command Input Error
EF
Both forward run and reverse run closed simultaneously for longer than 0.5 s.
Check the forward and reverse command sequence and correct the problem.
Note: When minor fault EF detected, motor ramps to stop.
Option Card External Fault
EF0
An external fault condition is present.
• Remove the cause of the external fault.
• Remove the external fault input from the PLC.
External Fault (Input Terminal S1)
EF1
External fault at multi-function input terminal S1.
External fault (input terminal S2)
EF2
External fault at multi-function input terminal S2.
External fault (input terminal S3)
EF3
External fault at multi-function input terminal S3.
External fault (input terminal S4)
EF4
External fault at multi-function input terminal S4.
External fault (input terminal S5)
EF5
External fault at multi-function input terminal S5.
External fault (input terminal S6)
EF6
External fault at multi-function input terminal S6.
External fault (input terminal S7)
EF7
External fault at multi-function input terminal S7.
External fault (input terminal S8)
EF8
External fault at multi-function input terminal S8.
Internal Fan Fault
FAn
Fan or magnetic contactor failure (detected when L8-32 = 3 or 4)
• 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.
• 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.
Excessive PID Feedback
FbH
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.
Check parameters b5-36 and b5-37.
Correct the wiring.
Minor Fault Name
Possible Solutions
Minor Fault Name
Possible Solutions
Possible Solution
Minor Fault Name
Possible Solutions
YASKAWA ELECTRIC TOEP C710616 41G YASKAWA AC Drive - A1000 Quick Start Guide