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Sigma II User's Manual
n
A.7A
A.7A: Heat Sink Overheated
Display and Outputs
Status and Remedy for Alarm
During servomotor
operation.
The ambient temperature of the servo
A
amplifier exceeds 55°C.
Inadequate air flow around the heat
B
sink .
C
Fan stopped.
Servo amplifier is operating under
D
overload.
E
Defective servo amplifier.
Note: This alarm tends to occur only with a servo amplifier of 30 to 1000W.
Alarm Outputs
Alarm Code Output
ALO1
ALO2
ON
ON
Note:
OFF:
Output transistor is OFF (alarm state).
ON:
Output transistor is ON.
A, B,
C, D
Cause of the Problem
Chapter 9: Inspection, Maintenance, and Troubleshooting
ALM Output
ALO3
ON
OFF
When control power
is turned ON.
Solution
Alter conditions so that the ambient
temperature goes below 55°C.
Provide sufficient space as specified.
Replace servo amplifier.
Reduce load.
Replace servo amplifier.
9-18
E
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