5.6 Alarm Detection
YASKAWA TM.V1000.01 V1000 Drive Installation & Start-Up Manual (Preliminary 01-19-07) 227
Troubleshooting
5
LED Operator Display Minor Fault Name
dnE Drive Disabled
Cause Possible Solutions
Minor Fault
Output
(H2- = 10)
“Drive Enable” is set to a multi-
function contact input
(H1- = 6A) and that signal was
switched off.
Check the operation sequence. YES
LED Operator Display Minor Fault Name
EF
Forward/Reverse Run Command Input Error
Both forward run and reverse run closed simultaneously.
Cause Possible Solutions
Minor Fault
Output
(H2- = 10)
Sequence error
Check the forward and reverse command sequence and
correct the problem.
Note: When minor fault EF is detected, the motor ramps to
stop.
YES
LED Operator Display Minor Fault Name
EF0
Option Card External Fault
An external fault condition is present.
Cause Possible Solutions
Minor Fault
Output
(H2- = 10)
An external fault was received from
the PLC with F6-03 = 3 (causing the
drive to continue running when an
external fault occurs).
• Remove the cause of the external fault.
• Remove the external fault input from the PLC.
YES
There is a problem with the PLC
program.
Check the PLC program and correct problems. YES
LED Operator Display Minor 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.
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