Q2BYG403MD Driver User’s Manual
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4.3 Troubleshooting
Failure
Possible reason
Solution
Power supply system
has error
Check the power supply circuit
Power indicator is
off
Supply voltage is low
Increase the supply voltage
Motor wire isn’t
connected properly
Check the wiring
Voltage is too high or
too low
Check the power supply
Alarm indicator is
on
Current is too large
Check the power supply
The power supply isn’t
connected
Check and connect the power
supply
Motor wiring error
Check the wiring
Protection circuit works
Reconnect the power supply
Enable signal is low
Disconnect EN signal
Current setting is too
low
Reset the current
Subdivision is too small
Reset the subdivisions
Motor doesn’t run
No pulse signal input
Adjust the pulse signal
Subdivision has error
Reset the subdivisions
Motor load is too high
Change the motor or increase the
current
Position is
inaccurate
Motor wire bad contact
Check and connect the wires
properly
Direction signal isn’t
connected properly
Interchange two wires in the
winding of same phase
Motor rotation is
wrong
Motor wire is
disconnected
Check and connect properly
Acceleration is too high
Reduce the acceleration
Motor torque is too
small
Select appropriate motor
Motor
acceleration
stalled
Maximum speed is too
high
Reduce the maximum speed
☻
Prompt
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