11 Inspection, Maintenance, and Troubleshooting
11.1.1 Alarm Display Table
11-2
11.1 Troubleshooting
11.1.1 Alarm Display Table
The relation between alarm displays and alarm code outputs is shown in Table 11.1.
If an alarm occurs, the servomotor can be stopped by doing either of the following operations.
• DB STOP: Stops the servomotor immediately using the dynamic brake.
• COAST TO A STOP: Stops naturally, with no brake, by using the friction resistance of the motor in oper-
ation.
Table 11.1 Alarm Displays and Outputs
Alarm
Display
Alarm Name Meaning
Alarm
Reset
Alarm Code Output Servo
Alarm
(ALM)
Output
ALO1 ALO2 ALO3
A.02
Parameter Breakdown
EEPROM data of SERVOPACK is
abnormal.
N/A
HHHH
A.03
Main Circuit Encoder Error
(Not detected for the SERVOPACKs
with the capacity of 6.0 kW or more.)
Detection data for power circuit is
abnormal.
Available
A.04
Parameter Setting Error
The parameter setting is outside the
allowable setting range.
N/A
A.05
Combination Error
SERVOPACK and servomotor capaci-
ties do not match each other.
Available
A.09
Dividing Ratio Setting Error
*1
The setting of dividing ratio (Pn212) is
not acceptable (out of fixed incre-
ments), or exceeds the value for the
connected, encoder resolution.
N/A
A.0A
Encoder Model Unmatched
*1
The mounted serial encoder is not sup-
ported by Σ-II series SERVOPACK.
N/A
A.10
Overcurrent or Heat Sink Overheated
An overcurrent flowed through the
IGBT.
Heat sink of SERVOPACK was over-
heated.
N/A
LHHH
A.30
Regeneration Error Detected
Regenerative transistor or regenerative
resistor is faulty.
Available
LLHH
A.32
Regenerative Overload
Regenerative energy exceeds regener-
ative resistor capacity.
Available
A.33
Main Circuit Power
Supply Wiring Error
The power supply to the main circuit
does not match the parameter Pn001
setting.
Available
A.40
Overvoltage
*2
Main circuit DC voltage is excessively
high.
Available
HHL H
A.41
Undervoltage
*2
Main circuit DC voltage is excessively
low.
Available
A.51
Overspeed The motor speed is excessively high.
Available
LHLH
A.71
Overload: High Load
The motor was operating for several
seconds to several tens of seconds
under a torque largely exceeding rat-
ings.
Available
LLLH
A.72
Overload: Low Load
The motor was operating continuously
under a torque largely exceeding rat-
ings.
Available
A.73
Dynamic Brake Overload
(Not detected for the SERVOPACKs
with the capacity of 30 W to 1.0 kW.)
When the dynamic brake was applied,
rotational energy exceeded the capac-
ity of dynamic brake resistor.
Available
A.74
Overload of Surge
Current Limit Resistor
The main circuit power was frequently
turned ON and OFF.
Available
A.7A
Heat Sink Overheated
(Not detected for the SERVOPACKs
with the capacity of 30 W to 1.0 kW.)
The heat sink of SERVOPACK over-
heated.
Available
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