D 12.2 SERVOPACK
12.2.1 LED Indication (7-segment) for Troubleshooting
Table 12.2 LED Indication for Troubleshooting
LED Detection Lighting Condition Probable Cause Corrective Action
Goes ON when power issupplied to the • Defective control circuit board • Replace the SERVOPACK.
control circuit. (1 PWB).
Goes ON when power issupplied to the •° Defective current feedback circuit. • Replace the SERVOPACK.
main circuit and servo power is turned • Defective main circuit transistor • Correct grounding.
ON. module.
• MCCB does not trip. • Motor grounding
[_] Over- Goes ON when power is supplied to the • Defective motor grounding • Replace the motor.
current main circuit and servo power is turned • Defective main circuit transistor • Replace the SERVOPACK.
ON. module.
• MCCB does not trip.
Goes ON when power is supplied to the • Defective main circuit transistor • Replace the SERVOPACK.
main circuit, module.
Goes ON when the motor accelerates ,'Incomplete (1 PWB) VR8 • Replace the SERVOPACK.
or decelerates. - adjustment.
Goes ON when power is supplied to the • Defective control circuit board • Replace the SERVOPACK.
control circuit. (1 PWB).
Circuit
-_ Goes ON when power is supplied to the * Defective main circuit thyristor- • Replace the SERVOPACK.
protector
main circuit, diode module.
tripped • MCCBtrips. '.
• Defective main circuit of SERVOPACK
Goes ON during operation. (Do not turn ON again.)
D . .. Goes ON when power is supplied to the • Defective control circuit board. • Replace the SERVOPACK.
Regener- control circuit. (1 PWB).
_] ative Goes ON approximate 0.5 to 1 second • Defective regenerative transistor. • Replace the SERVOPACK.
after power is supplied to the main
trouble circuit. • Regenerative resistor disconnection. • Check and replace the regenerative
• No regenerative resistor resistor. (Replace the SERVOPACK.
connection (SR60BB) -
Goes ON when the motor accelerates • Load inertia JL (GD 2) is too large. • Check the inertia of the machine
Over- or decelerates, with the value converted to the
r__ motorShaft.
voltage
• Defective regenerative circuit. • Replace the SERVOPACK.
D "
When the reference is input, the motor • Motor connection error. ° Correct the motor connection.
Over- runs fast and [] goes ON. . Optical encoder connectior_ error. • Check pulses in phases A, B, C, U,
-_ VandWon2CN,andcorrectwiring.
speed
• The reference input voltage is too • Decrease the reference input
large, voltage.
[_ Voltage Goes ON when power is supplied to the • Defective main circuit thyristor- • Replace the SERVOPACK.
drop main circuit. " diode module.
Goes ON when power is supplied to the • Defective control circuit board • Replace the SERVOPACK.
control circuit. (1 PWB).
Goes ON during operation. • Operation with 105% to 130% or • Check and correct the load
Overload • When power to the control circuit is more of the rated load. (may be overload).
turned OFF and then ON again, the
operation starts.
Goes ON during operation. • Fan has stopped. • Check the fan.
• When power to the control circuit is (SR20, 30, 44, 60)
turned OFF and then ON again,
I _] and [] goes ON again. • Temperature around the • Decrease the temperature below
Heat When reset later, the operation SERVOPACK exceeds 551C. 55°C (The heat sink may be
starts, overheated.)
[_] sink
D " overheat The motor rotates, but the torque is un- • Motor circuit error connection, • Correct the connection.
available. When power to the control such as U--*V, V_W, W-.U or
circuit is turned OFF and then ON again, single-phase connection.
the operation starts, but the torque is still
unavailable. .
-77-
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