Yaskawa Large Capacity Sigma II Series - Manual (Page 347)

8 Inspection, Maintenance, and Troubleshooting
8.2.1 Troubleshooting Problems with Alarm Displays
8-8
„ A.10
A.10: Overcurrent or Heat Sink Overheated
Display and Outputs
Note: OFF:Output transistor is OFF (alarm state). ON: Output transistor is
ON.
Status and Remedy for Alarm
Note: E to H can occur with a SERVOPACK with a capacity of all models
(400 V) and 1.5 kW to 5 kW (200 V).
Alarm Outputs
Alarm Code Outputs ALM Output
ALO1 ALO2 ALO3
ON OFF OFF OFF
Cause Remedy
A Wiring shorted between SERVOPACK and
servomotor. Check and correct wiring.
B Servomotor phase U, V, or W shorted. Replace the 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 SERVO-
PACK exceeded 55
°C.
Alter conditions so that the ambient temper-
ature goes below 55
°C.
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 over-
load. Reduce load.
A, B, D, E,
F, G, H
C, D
C
During servomotor
operation When SERVO ON (/S-ON)
signal turned ON
At power ON