6
Operation
Axis module fault
Operating Instructions – MOVIDRIVE
®
modular
167
6.5 Axis module fault
6.5.1 Fault 1 Output stage monitoring
Subfault: 1.1
Description: Short circuit in motor output terminals
Response: Output stage inhibit
Cause Measure
Overcurrent in output stage or faulty output stage control detec-
ted, and output stage inhibited by hardware.
Possible causes for overcurrent are short circuit at the output,
excessive motor current, or a defective power output stage.
Subfault: 1.2
Description: Overcurrent in output stage
Response: Output stage inhibit
Cause Measure
Motor current too high. Connect a smaller motor.
Current supply Check current supply.
Current transformer Check current transformer.
Ramp limit is deactivated and set ramp time is too short. Increase ramp time.
Phase module defective Check phase module.
Supply voltage 24V or 24V generated from it is instable. Check 24 V supply voltage.
Interruption or short circuit on the signal lines of the phase
modules.
Check signal lines.
6.5.2 Fault 3 Ground fault
Subfault: 3.1
Description: Ground fault
Response: Output stage inhibit
Cause Measure
Ground fault in motor lead. Eliminate ground fault in motor lead.
Ground fault in inverter. Eliminate ground fault in inverter.
Ground fault in motor. Eliminate ground fault in motor.
Ground fault in line components. Eliminate ground fault in line components.
6.5.3 Fault 4 Brake chopper
Subfault: 4.1
Description: Brake chopper overcurrent
Response: Output stage inhibit
Cause Measure
Excessive regenerative power. Extend deceleration ramps.
Short circuit detected in braking resistor circuit Check supply cable to braking resistor.
Braking resistance too high Check technical data of braking resistor.
Subfault: 4.2
Description: Brake chopper defective
Response: Output stage inhibit
Cause Measure
Output stage of brake chopper defective Replace defective brake chopper.
6.5.4 Fault 6 Line fault
Subfault: 6.1
Description: Line phase failure
Response: Line phase failure
Cause Measure
Missing line phase detected. Check the power supply cable.
DC link voltage periodically too low. Check the configuration of the supply system.
Inadequate line voltage quality. Check supply (fuses, contactor).
24748536/EN – 11/2017
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