Troubleshooting - YASKAWA V1000 Serie Guia De Inicio Rapido

7

Troubleshooting

General Fault and Alarms
Faults and alarms indicate problems in the drive or in the machine.
An alarm is indicated by a code on the data display and the flashing ALM LED. The drive
output is not necessarily switched off.
A fault is indicated by a code on the data display and the ALM LED is on. The drive out-
put is always switched off immediately and the motor coast to stop.
To remove an alarm or reset a fault, trace the cause, remove it and reset the drive by
pushing the Reset key on the operator or cycling the power supply.
This lists up the most important alarms and faults only. Please refer to the Technical
Manual for a complete list.
LED Display AL
Base Block
Control Fault
Control circuit
Fault
to
Control circuit
Fault
Cannot Reset
Option External
Fault
External Fault
External Faults
to
Ground Fault
Safe Disable
FLT Cause
The software base block function is assigned to one
of the digital inputs and the input is off. The drive
does not accept Run commands.
The torque limit was reached during deceleration for
longer than 3 sec. when in Open Loop Vector control
• The load inertia is too big.
• The torque limit is too low.
• The motor parameters are wrong.
There is a problem in the drive's control circuit
There is no terminal board connected to the control
board
Fault reset was input when a Run command was
active
An external fault was tripped by the upper controller
via an option card.
A forward and reverse command were input simulta-
neously for longer than 500 ms. This alarm stops a
running motor
• An external fault was triggered by an external
device via one of the digital inputs S1 to S6.
• The digital inputs are set up incorrectly.
• Ground leakage current has exceeded 50% of the
drives rated output current.
• Cable or motor insulation is broken.
• Excessive stray capacitance at drive output.
Both Safe Disable inputs are open. The drive output
is safely disabled and the motor can not be started.
• Check the digital inputs function selection.
• Check the upper controller sequence.
• Check the load.
• Set the torque limit to the most appropriate setting
(L7-01 through L7-04).
• Check the motor parameters.
• Cycle the drive power supply.
• Initialize the drive.
• Replace the drive if the fault occurs again.
• Check if the terminal board is installed properly.
• Uninstall and Reapply the terminal board.
• Change the drive.
Turn off the Run command and reset the drive.
• Remove the fault cause, reset the fault and restart the
drive.
• Check the upper controller program.
• Check the sequence and make sure that the forward and
reverse input are not set 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 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.
• If the Safe Disable function is not utilized for EN60204-
1, stop cat. 0 or for disabling the drive, the terminals HC,
H1, H2 must be linked.
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7 Troubleshooting
Corrective Action