12. TROUBLESHOOTING GUIDE
12.1 AC SERVOMOTOR
WARNING
Remedies in _ should be practiced
after turning OFF the power.
Table 12.1 Troubleshooting Guide for AC SERVOMOTOR
Trouble Cause Whatto do
Measure voltage across motor terminals U, V, and W
Voltage below rated
with a tester and correct to rated value.
Loose connection Tighten connection.
Motor does not
Wrong wiring Correct wiring.
start.
Overload load or use a larger motor.
Measure voltage across motor terminals U, V, and W
Motor defective
with a tester. When correct, replace motor.
Inspect and correct wprung across motor terminals U, _]
Unstable operation _ Wrong wiring V, and W, and PG. _.... _ _ _ _
Excessive ambient Reduce ambient temperature below 40°C.
temperature.
Motor overheats. Motor surface is dirty Clean motor surface.
Overload Reduce load or use a larger motor.
Motor loosely mounted Tighten foundation bolts.
Motor misaligned Realign.
Unusual noise Coupling out of balance Balance coupling.
Check alignment, noise of bearing, lubrication and contact
Noisy bearing
your YASKAWA representative.
Vibration of driven machine Contact the machine manufacturer.
-76-
To Next Page
Loading...
Need help?
General
