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Digital Operator Display
Minor Fault Name
Load is too heavy
Reduce the load.
YES
Acceleration and deceleration times are set too
short.
Increase the acceleration and deceleration times (C1-01 through C1-08).
The load is locked up.
Check the machine.
Parameter settings are inappropriate.
Check the settings of parameters F1-10 and F1-11.
The motor brake engaged.
Ensure the brake releases properly.
Digital Operator Display
Minor Fault Name
dnE
Drive Disabled
Cause
Possible Solution
Minor Fault
(H2-
oo
= 10)
“Drive Enable” is set to a multi-function
contact input (H1-
oo
= 6A) and that signal
was switched off.
Check the operation sequence.
YES
Digital Operator Display
Minor Fault Name
E5
MECHATROLINK Watchdog Timer Error
Cause
Possible Solution
Minor Fault
(H2-
oo
= 10)
The watchdog timer expired while waiting for
data from the controller.
Issue a DISCONNECT or ALM_CLR command, followed by a CONNECT or
SYNC_SET command and move to phase 3.
YES
Digital Operator Display
Minor Fault Name
EF
Forward/Reverse Run Command Input Error
Both forward run and reverse run closed simultaneously for over 0.5 s.
Cause
Possible Solution
Minor Fault
(H2-
oo
= 10)
Sequence error
Check the forward and reverse command sequence and correct the problem.
Note:
Motor ramps to stop when minor fault EF is detected.
YES
Digital Operator Display
Minor Fault Name
EF0
Option Card External Fault
An external fault condition is present.
Cause
Possible Solution
Minor Fault
(H2-
oo
= 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.
Digital 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.
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.
6.5 Alarm Detection
284
YASKAWA ELECTRIC SIEP C710606 18F YASKAWA AC Drive – V1000 Technical Manual