
B-65325EN/01 TROUBLESHOOTING FOR βi SVM 3.TROUBLESHOOTING AND ACTION
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3.1.9 Inverter: Motor Current Alarm
(1) Meaning
Inverter: DC link current alarm
(2) Cause and troubleshooting
(a) Checking the servo parameters
Referring to "FANUC AC SERVO MOTOR αis/αi/βis
series Parameter Manual (B-65270EN)," check whether the
following parameters have default values.
Series 15i
No.1809 No.1852 No.1853
Series 16i, 18i, 20i, 21i, 0i
Power Mate i
No.2004 No.2040 No.2041
Alternatively, if an abnormal motor current alarm condition
occurs only on rapid acceleration/deceleration, it is likely
that the motor is being used under too harsh a condition.
Increase the acceleration/deceleration time constant, and see
what will occur.
(b) Be sure to push the faceplate (control printed-circuit board)
as far as it will go.
(c) Disconnect the motor power leads from the SVM, and
release the SVM from an emergency stop condition.
<1> If no abnormal motor current occurs
→ Go to (d).
<2> If an abnormal motor current occurs
→ Replace the SVM.
(d) Disconnect the motor power leads from the SVM, and check
the insulation between PE and the motor power lead U, V, or
W.
<1> If the insulation is deteriorated
→ Go to (e).
<2> If the insulation is normal
→ Replace the SVM.
(e) Disconnect the motor from its power leads, and check
whether the insulation of the motor or power leads is
deteriorated.
<1> If the insulation of the motor is deteriorated
→ Replace the motor.
<2> If the insulation of any power lead is deteriorated
→ Replace the power lead.