Status and remedy for alarm, A.30, Display and outputs – Yaskawa MP940 User Manual
Page 375

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