Omron OMNUC W R88A-NCW152-DRT, Manual

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9.3 Troubleshooting with Alarm Displays
9-9
9
„ A.10
A.10: Overcurrent
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 200-V Servo Driver models for 1.5 to 5 kW.
Alarm Outputs
Alarm Code Outputs ALM Output
ALO1 ALO2 ALO3
ON OFF OFF OFF
Cause Remedy
A Wiring shorted between Servo Driver and
Servomotor. Check and correct wiring.
B Servomotor phase U, V, or W shorted. Replace the Servomotor.
C • Circuit board (1PWB) is defective.
• Power transistor is defective. Replace the Servo Driver.
D
Current feedback circuit, power transistor,
DB relay, or circuit board is defective. Replace the Servo Driver.
E The ambient temperature of the Servo
Driver exceeded 55
°
C.
Alter conditions so that the ambient tem-
perature 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 the Servo Driver.
H The Servo Driver is operating under an
overload. Reduce load.
At power ON
C
A, B, D, E,
F, G, H
C, D
During Servomotor
operation When SERVO ON
(RUN) signal turned ON