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YASKAWA Europe TOEP_C710606_97A - AC Drive A1000 IP54READY - Quick Start Guide
7 Troubleshooting
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 output 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.
Digital Operator AL
FLT
Cause
Corrective Action
Base Block
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.
• Check the digital inputs function selection.
• Check the upper controller sequence.
Control Fault
The torque limit was reached during deceleration for
longer than 3 s. when in Open Loop Vector control
• The load inertia is too big.
• The torque limit is too low.
• The motor parameters are wrong.
• Check the load.
• Set the torque limit to the most appropriate setting
(L7-01 through L7-04).
• Check the motor parameters.
Control Circuit
Fault
There is a problem in the drive’s control circuit.
• Cycle the drive power supply.
• Initialize the drive.
• Replace the drive if the fault occurs again.
Control Circuit
Fault
There is no terminal board connected to the control
board.
• Check if the terminal board is installed properly.
• Uninstall and Reapply the terminal board.
• Change the drive.
Cannot Reset
Fault reset was input when a Run command was active. Turn off the Run command and reset the drive.
Option External
Fault
An external fault was tripped by the upper controller via
an option card.
• Remove the fault cause, reset the fault and restart the
drive.
• Check the upper controller program.
External Fault
A forward and reverse command were input
simultaneously for longer than 500 ms. This alarm
stops a running motor.
• Check the sequence and make sure that the forward
and reverse input are not set at the same time.
External Faults
• An external fault was triggered by an external device
via one of the digital inputs S1 to S8.
• The digital inputs are set up incorrectly.
• Find out why the device tripped the EF. Remove the
cause and reset the fault.
• Check the functions assigned to the digital inputs.
Ground Fault
• Ground leakage current has exceeded 50% of the
drives rated output current.
• Cable or motor insulation is broken.
• Excessive stray capacitance at drive output.
• Check the output wiring and the motor for short
circuits or broken insulation. Replace any broken
parts.
• Reduce the carrier frequency.
Safe Disable
Both Safe Disable inputs are open. The drive output is
safely disabled and the motor can not be started.
• 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 the
ISO13849-1, Category 3 PLd, and IEC61508, SIL2 or
for disabling the drive, the terminals HC, H1, H2 must
be linked.
Safe Disable Fault
Drive output is disabled while only one of the Safe
Disable inputs is open. (normally both input signals H1
and H2 should be open)
• One channel is internally broken and does not switch
off, even if the external signal is removed.
• Only one channel is switched off by the upper
controller.
• Check the wiring from the upper controller and make
sure that both signals are set correctly by the
controller.
• If the signals are set correctly and the alarm does not
disappear, replace the drive.
bb
CF
CPF02 to
CPF24
CPF25
CrST
EF0
EF
EF1 to EF8
GF
Hbb
HbbF
