YASKAWA SR01AB1ER, Bulletin

Page: 55 / 58

1 2. 2 S E R V O PA C K
LED Detection Lighting Condition Probable Cause Corrective Action
Goes ON when power is supplied to
the control circuit
• Defective control circuit board
(1 PWB)
• Replace the SERVOPACK
Over-
current
Goes ON when power is supplied
to the main circuit and servo
power is turned ON
• MCCB does not trip
• Defective current feedback circuit
• Defective main circuit transistor
module
• Insert the 3CN connector firmly
• Replace the SERVOPACK
Goes ON when power is supplied to
the main circuit and servo power is
turned ON
• MCCB trips • Defective motor grounding
• Defective main circuit transistor
module
• Replace the motor
• Replace the SERVOPACK
v.
Goes ON when power is supplied to
the main circuit • Defective main circuit transistor
module
• Replace the SERVOPACK
Goes ON when the motor is running • Faulty internal elements
• Defective internal elements • Replace the SERVOPACK
Circuit
protector
tnpped
Goes ON when power is supplied to
the control circuit • Defective control circuit board
(1PWB)
• Replace the SERVOPACK
Goes ON when power is supplied to
the main circuit • Defective main circuit diode
module
• Replace the SERVOPACK
e.
• MCCB trips
• Check if there is disconnection in
the wiring leads in SERVOPACK
• Check the conduction state on
connecting parts
Regener-
ative
trouble
Goes ON when power is supplied to
the control circuit • Defective control circuit board
(1 PWB)
• Replace the SERVOPACK
3.
Goes ON approximate 0 5 to 1
second after power is supplied to the
main circuit
• Defective regenerative ransistor
• Replace the SERVOPACK
• Regenerative resistor
disconnection
• Check and replace the regenerative
resistor (Replace the SERVOPACK )
Over-
voltage
Goes ON when the motor starts or
slows down • Load inertia (GD2) too large • Check the inertia of the machine
with the value converted to the
motor shaft
L i
—i•
• Defective regenerative circuit • Replace the SERVOPACK
Over-
speed
When the reference is input, the
motor runs fast and Is I goes ON
• Motor connection error
• Optical encoder connection error • Correct the motor connection
• Check and correct pulses in phases
A, B, C, U, V and W with 2CN
• The reference input voltage too
large
• Decrease the reference input
voltage
Voltage
drop Goes ON when power is supplied to
the main circuit • Defective main circuit doide
module
• Replace the SERVOPACK
a
I—P'
Overload
Goes ON when power is supplied to
the control circuit
• Defective control circuit board
(1 PWB)
• Replace the SERVOPACK
Goes ON during operation
• When power to the control circuit
is turned off and then turned on
again, the operation starts
• Operation with 105% to 130%
or more of the rated load
• Check and correct the load
(may be overload)
1 .
The motor rotates, but the torque is
unavailable When power to the
control circuit is turned OFF and then
turned ON again, the operation starts,
but the torque is still unavailable
• Motor circuit error connection,
such as U--,V, V—,AN, W—"U or
single-phase connection
• Correct the connection
12 2 1 L E D Indication (7-segment) for Tr o u b l e s h o o t i n g
Table 1 2 2 L E D Indication for Troubleshooting
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