11.1 Troubleshooting
11-3
11
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
A.81
Encoder Backup Error
All the power supplies for the absolute
encoder have failed and position data
was cleared.
N/A
HHHH
A.82
Encoder Checksum Error
The checksum results of encoder
memory is abnormal.
N/A
A.83
Absolute Encoder Battery Error
Backup battery voltage for the abso-
lute encoder has dropped.
Available
A.84
Encoder Data Error Data in the encoder is abnormal.
N/A
A.85
Encoder Overspeed
The encoder was rotating at high
speed when the power was turned ON.
N/A
A.86
Encoder Overheated
The internal temperature of encoder is
too high.
N/A
A.b1
Reference Speed Input Read Error
The A/D converter for reference speed
input is faulty.
Available
A.b2
Reference Torque Input Read Error
The A/D converter for reference
torque input is faulty.
Available
A.b3
Current Detection Error
*1
The current sensor is faulty, or the ser-
vomotor is disconnected.
Available
A.bF
System Alarm
A system error occurred in the SER-
VOPACK.
N/A
A.C1
Servo Overrun Detected The servomotor ran out of control.
Available
LHLH
A.C8
Absolute Encoder Clear Error and
Multiturn Limit Setting Error
The multiturn for the absolute encoder
was not properly cleared or set.
N/A
A.C9
Encoder Communications Error
Communications between SERVO-
PACK and encoder is not possible.
N/A
A.CA
Encoder Parameter Error Encoder parameters are faulty.
N/A
A.Cb
Encoder Echoback Error
Contents of communications with
encoder is incorrect.
N/A
A.CC
Multiturn Limit Disagreement
Different multiturn limits have been
set in the encoder and SERVOPACK.
N/A
A.d0
Position Error Pulse Overflow
Position error pulse exceeded parame-
ter (Pn505).
Available
LLHH
A.F1
Power Line Open Phase
One phase is not connected in the
main power supply.
Available
HLHH
Table 11.1 Alarm Displays and Outputs (Cont’d)
Alarm
Display
Alarm Name Meaning
Alarm
Reset
Alarm Code Output Servo
Alarm
(ALM)
Output
ALO1 ALO2 ALO3
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