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8 Troubleshooting
LED Display AL FLT
Speed
Deviation
dEv
Rotation
Direction Fault
dv3
Rotation
Direction Fault
dv4
Over
acceleration
dv6
Up/Down
Command
Error
EF
External Faults
EF03 to
EF08
Speed
Reference
Missing
FrL
Ground Fault
GF
Safe Disable
Hbb
YASKAWA ELECTRIC YEG-TOEP-C710606-50A-1-0YaskawaACDrives-L1000VQuickStartGuide
46
Possible Cause
F1-04 is set to 0, 1, or 2 and a speed devia-
tion higher than the value in F1-10 occurred
longer than the time set in F1-11.
F1-04 is set to 3 and a speed deviation higher
than the value in F1-10 occurred longer than
the time set in F1-11.
A speed deviation higher than 30% occurred
while the torque reference and acceleration
direction are opposite.
Motor speed and speed reference directions
are opposite and a deviation larger than set in
F1-19 occurs.
The car acceleration is higher than the value
set in parameter S6-10 for longer than the
time set in S6-17.
The Up and Down command were input
simultaneously for longer than 500 ms.
• An external fault was triggered by an exter-
nal device via one of the digital inputs (S3
to S7).
• The digital inputs are set incorrectly.
Parameter d1-18 is set to 3, leveling speed
detection is not assigned to a digital input
≠ 53) and no speed was selected
(H1-
while an Up or Down command was entered.
• Ground leakage current has exceeded 50%
of the drives rated output current.
• Cable or motor insulation is broken.
• Excessive stray capacitance at drive out-
put.
The Safe Disable input is open. The drive
output is safely disabled and the motor can
not be started.
Corrective Action
• Reduce the load
• Decrease the acceleration and deceleration
rate.
• Check the mechanical system (lubrication,
etc.)
• Check the setting of F1-10 and F1-11
• Check the brake sequence to make sure the
brake is fully open when acceleration
starts.
• Check the encoder wiring
• Verify the encoder rotation direction. Per-
form an offset tuning.
• Reduce the load.
• Check the brake sequence.
• Verify the encoder direction.
• Perform an encoder tuning.
• Check the brake sequence.
• Adjust acceleration and deceleration rates.
• Check the value set to S6-10 is not too
small.
Check the sequence and make sure that the
Up and Down command are not enabled at
the same time.
• Find out why the device tripped the EF.
Remove the cause and reset the fault.
• Check the functions assigned to the digital
inputs.
• Check the speed selection inputs.
• Check the sequence. Make sure the speed
is selected before the Up or Down com-
mand is input.
• Check the output wiring and the motor for
short circuits or broken insulation. Replace
any broken parts.
• Reduce the carrier frequency.
• Check why the upper controller's safety
device disabled the drive. Remove the
cause and restart.
• Check the wiring.Terminals HC, H1 must
be linked if the Safe Disable function is not
utilized.
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