Yaskawa MP940 - 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