11 Inspection, Maintenance, and Troubleshooting
11.2.1 List of Servo Drive Alarms
11-6
A.41A
Converter DC Undervoltage
The DC-bus voltage inside the power regeneration converter
is abnormally low.
Gr.2
Available
A.41B
Converter AC Undervoltage
The AC voltage inside the power regeneration converter is
abnormally low.
Gr.1
Available
A.41C
Power Failure While Motor
Running
The AC power supply was cut off while the motor was run-
ning.
Gr.1
Available
A.42C
Converter Initial Charging
Error
The charging of the main circuit capacitor did not finish
within the specified period of time.
Gr.1
Available
A.450
Main Circuit Capacitor
Overvoltage
The capacitor of the main circuit has deteriorated or is faulty.
Gr.1
N/A
A.510
Overspeed
The motor speed is excessively high.
Gr.1
Available
A.521
Autotuning Alarm
Vibration was detected during autotuning.
Gr.1
Available
A.531
Excessive Speed Deviation
The deviation between the speed reference and the actual
motor speed is abnormal.
Gr.1
Available
A.540
Overspeed
(During Low-speed Winding)
The low-speed winding maximum rotation speed was
exceeded during low-speed winding.
Gr.1
Available
A.690
Winding Selection Operation
Fault
• During the winding selection operation check that is per-
formed when the power is turned ON, the electromagnetic
contactor for winding selection did not change according
to the internal command.
• Winding selection was not completed within two seconds
of receiving the winding selection command.
• Chattering occurred in the electromagnetic contactor for
winding selection when the winding selection command
was not received.
Gr.1
N/A
A.6B0
Emergency Stop Failure
The motor did not stop within 10 s after the emergency stop
signal input.
Gr.1
Available
A.710
Overload: High Load
The motor was operating for several seconds to several tens
of seconds under a torque largely exceeding ratings.
Gr.2
Available
A.720
Overload: Low Load
The motor was operating continuously under a torque
largely exceeding ratings.
Gr.1
Available
A.72A
Converter Electric Operation
Overload
Continuous electrical operation was performed that
exceeded the rated output of the power supply regenerative
converter.
Gr.2
Available
A.72B
Converter Power Supply
Regenerative Overload
Continuous regenerative operation was performed that
exceeded the ratings of the power regenerative converter.
Gr.1
Available
A.730
A.731
Dynamic Brake Overload
When the dynamic brake was applied, rotational energy
exceeded the capacity of dynamic brake resistor.
Gr.1
Available
A.74A
Converter Inrush Resistance
Overload
The main circuit power supply turned ON and OFF fre-
quently.
Gr.1
Available
A.790
Motor Overheated
The motor temperature exceeded the upper limit.
Gr.1
Available
A.791
Motor Temperature Detection
Error
The motor thermistor is either disconnected or is damaged.
Gr.1
N/A
A.7A0
Heat Sink in SERVOPACK
Overheated
The temperature of the heat sink in the SERVOPACK
exceeded 100
°
C, or the thermistor in the SERVOPACK was
disconnected or damaged.
Gr.2
Available
A.7AB
Built-in Fan in SERVOPACK
Stopped
*1
The fan inside the SERVOPACK stopped.
Gr.1
Available
A.7AC
Built-in Fan in Converter
Stopped
*1
The fan inside the power regeneration converter stopped.
Gr.1
Available
A.7BA
Converter Heat Sink
Overheated
The heat sink inside the power regeneration converter
exceeded 100
°
C, or the thermistor in the converter was dis-
connected or damaged.
Gr.2
Available
∗
1.
If the fan stops, an alarm or a warning will issued in accordance with the setting of SERVOPACK parameter
Pn00D.2.
(cont’d)
Alarm
Display
Alarm Name
Meaning
Motor Stop
Method
Alarm
Reset
