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Status and remedy for alarm, A.30, Display and outputs – Yaskawa MP940 User Manual

Page 375

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SERVOPACK Inspection, Maintenance, and Troubleshooting

10.2.1 Troubleshooting Problems with Alarm Displays

10-8

Status and Remedy for Alarm

Note: E to H can occur with a SERVOPACK with a capacity of 1.5 kW to

3 kW.

„

A.30

A.30: Regenerative Error Detected

Display and Outputs

Note: OFF: Output transistor is OFF (alarm state).

ON: Output transistor is ON.

Cause

Remedy

A

Wiring shorted between SERVOPACK and ser-
vomotor.

Check and correct wiring.

B

Servomotor phase U, V, or W shorted.

Replace servomotor.

C

• Circuit board (1PWB) defective.
• Power transistor defective.

Replace SERVOPACK.

D

Current feedback circuit, power transistor, DB
circuit, or circuit board defective.

Replace SERVOPACK.

E

The ambient temperature of the SERVOPACK
exceeded 55ºC.

Alter conditions so that the ambi-
ent temperature goes below 55ºC.

F

The air flow around the heat sink is bad.

Follow the installation method
and provide sufficient space as
specified.

G

Fan stopped.

Replace SERVOPACK.

H

SERVOPACK is operating under an overload.

Reduce load.

Alarm Outputs

Alarm Code Outputs

ALM Output

ALO1

ALO2

ALO3

ON

ON

OFF

OFF

A,B,D,E

,

F,G,H

C, D

C

During servomotor

operation

At power ON

When SERVO ON (/S-

ON) signal turned ON

A, B, D, E,

F, G, H