A.7a, Display and outputs, Status and remedy for alarm – Yaskawa Sigma II Series Servo System User Manual
Page 406
Sigma II User’s Manual
Chapter 9: Inspection, Maintenance, and Troubleshooting
9 - 18
A.7A
A.7A: Heat Sink Overheated
Heat sink temperature exceeds 100°C.
Display and Outputs
Note:
OFF:
Output transistor is OFF (alarm state).
ON:
Output transistor is ON.
Status and Remedy for Alarm
Note:
Larger servo amplifiers (1.5kW., or larger) will display alarm A.10 if the
heat sink overheats.
Alarm Outputs
Alarm Code Output
ALM Output
ALO1
ALO2
ALO3
ON
ON
ON
OFF
Cause of the Problem
Solution
A
The ambient temperature of the
servo amplifier exceeds 55°C.
Alter conditions so that the ambi-
ent temperature goes below
55°C.
B
Inadequate air flow around the
heat sink .
Provide sufficient space as speci-
fied.
C
Fan stopped.
Replace servo amplifier.
D
Servo amplifier is operating under
overload.
Reduce load.
E
Defective servo amplifier.
Replace servo amplifier.
During servomotor
operation.
When control power
is turned ON.
E
A, B
C, D