YASKAWA A1000 Quick Start Manual

Also see for A1000 Series: Installation manual Technical manual Technical manual Manual Technical manual

Contents

7 TroubleshootingYASKAWA ELECTRIC TOEP C710616 27D YASKAWA AC Drive - A1000 Quick Start Guide 317 Troubleshooting General Fault and AlarmsFaults 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 necessarilyswitched off.A fault is indicated by a code on the data display and the ALM LED is on. The drive output is always switched offimmediately 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 theoperator 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 ActionBase Block The software base block function is assigned to one ofthe digital inputs and the input is off. The drive does notaccept Run commands.• Check the digital inputs function selection.• Check the upper controller sequence.Control Fault The torque limit was reached during deceleration forlonger 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 CircuitFault 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 CircuitFault There is no terminal board connected to the controlboard.• 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 ExternalFault An external fault was tripped by the upper controller viaan option card.• Remove the fault cause, reset the fault and restart thedrive.• Check the upper controller program.External Fault A forward and reverse command were inputsimultaneously for longer than 500 ms. This alarmstops a running motor.• Check the sequence and make sure that the forwardand reverse input are not set at the same time.External Faults • An external fault was triggered by an external devicevia one of the digital inputs S1 to S8.• The digital inputs are set up incorrectly.• Find out why the device tripped the EF. Remove thecause and reset the fault.• Check the functions assigned to the digital inputs.Ground Fault • Ground leakage current has exceeded 50% of thedrives rated output current.• Cable or motor insulation is broken.• Excessive stray capacitance at drive output.• Check the output wiring and the motor for shortcircuits or broken insulation. Replace any brokenparts.• Reduce the carrier frequency.Safe Disable Both Safe Disable inputs are open. The drive output issafely disabled and the motor can not be started.• Check why the upper controller’s safety devicedisabled the drive. Remove the cause and restart.• Check the wiring.• If the Safe Disable function is not utilized for theISO13849-1, Category 3 PLd, and IEC61508, SIL2 orfor disabling the drive, the terminals HC, H1, H2 mustbe linked.Safe Disable Fault Drive output is disabled while only one of the SafeDisable inputs is open. (normally both input signals H1and H2 should be open)• One channel is internally broken and does not switchoff, even if the external signal is removed.• Only one channel is switched off by the uppercontroller.• Check the wiring from the upper controller and makesure that both signals are set correctly by thecontroller.• If the signals are set correctly and the alarm does notdisappear, replace the drive.bbCFCPF02 toCPF24CPF25CrSTEF0EFEF1 to EF8GFHbbHbbF