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30 YASKAWA TOMPYEULA5001C LA500 Installation and Operation Instructions
Code Name Causes Possible Solutions
The main circuit capacitors have
become unserviceable.
• Examine the capacitor maintenance time
in monitor U4-05
[CapacitorMaintenance].
• If U4-05 is more than 90%, replace the
capacitor. Contact Yaskawa or your
nearest sales representative for more
information.
• Examine the supply voltage for
problems.
• Re-energize the drive.
• If the alarm stays, replace the circuit
board or the drive. For information about
replacing the control board, contact
Yaskawa or your nearest sales
representative.
SE1 Sequence Error 1
There is a problem with the motor
contactor or auxiliary switch.
Check the motor contactor, auxiliary
switches and the wiring of the contactor
feedback signal.
SE2 Sequence Error 2
The motor contactor is open. Check the contactor for any problems.
SE3 Sequence Error 3
The motor contactor is open. Check the contactor for any problems.
SE4 Sequence Error 4
The feedback contact on the brake
is broken or the wiring is
incorrect.
Check the brake feedback contact and the
wiring.
STo Safe Torque OFF
Safe Disable inputs H1-HC and
H2-HC are open.
• Make sure that the Safe Disable signal is
input from an external source to terminal
H1-HC and H2-HC.
• When the Safe Disable function is not in
use, connect terminals H1-HC and H2-
HC.
STo
Hardware Base Block
OFF
Inputs H1-HC and H2-HC are
open.
• Make sure that the signal is input from
an external source to terminal H1-HC
and H2-HC.
• When the Hardware Base Block function
is not in use, connect terminals H1-HC
and H2-HC.
SToF
Hardware Base Block
Failure
One of the two terminals H1-HC
and H2-HC is enabled.
The input signal is wired
incorrectly.
• Make sure that the signal is input from
an external source to terminals H1-HC or
H2-HC.
• When the Hardware Base Block function
is not in use, connect terminals H1-HC
and H2-HC.
There is internal damage to one
channel.
Replace the board or the drive. For
information about replacing the control
board, contact Yaskawa or your nearest sales
representative.
SToF
Safe Torque OFF
Failure
One of the two terminals H1-HC
and H2-HC received the Safe
Disable input signal.
The Safe Disable input signal is
wired incorrectly.
• Make sure that the Safe Disable signal is
input from an external source to
terminals H1-HC or H2-HC.
• When the Safe Disable function is not in
use, connect terminals H1-HC and H2-
HC.
There is internal damage to one
Safe Disable channel.
Replace the board or the drive. For
information about replacing the control
board, contact Yaskawa or your nearest sales
representative.
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