ASDA-A2  Chapter 10 Troubleshooting 
10-2     Revision February, 2017 
Display  Alarm Name  Alarm Description 
Corresponding 
DO 
Servo 
Status 
AL017 
Abnormal 
EEPROM 
It is in error when DSP accesses 
EEPROM. 
ALM 
Servo 
Off 
AL018 
Abnormal signal 
output 
The encoder output exceeds the rated 
output frequency. 
ALM 
Servo 
Off 
AL019 
Serial 
Communication 
Error 
RS-232/485 communication is in error  ALM 
Servo 
Off 
AL020 
Serial 
Communication 
Time Out 
RS-232/485 communication time out  WARN 
Servo 
On 
AL022 
Main Circuit 
Power Lack 
Phase 
Only one single phase is inputted in the 
main circuit power. 
WARN 
Servo 
Off 
AL023 
Early Warning 
for Overload 
Early Warning for Overload  WARN 
Servo 
On 
AL024 
Encoder initial 
magnetic field 
error 
The magnetic field of the encoder U, V, 
W signal is in error. 
ALM 
Servo 
Off 
AL025 
The Internal of 
the Encoder is in 
Error 
The internal memory of the encoder and 
the internal counter are in error. 
ALM 
Servo 
Off 
AL026 
Unreliable 
internal data of 
the encoder 
The error of the internal data has been 
detected for three times continuously. 
ALM 
Servo 
Off 
AL027 
The Internal of 
the Motor is in 
Error 
The internal reset of the encoder is in 
error. 
ALM 
Servo 
On 
AL028 
Encoder voltage 
error or the 
internal of the 
encoder is in 
error 
Charging circuit of the servo drive is not 
removed and the battery voltage is 
higher than the specification (>3.8 V) or 
the encoder signal is in error.  
ALM 
Servo 
On 
AL029  Gray code error 
Absolute position is in error. 
ALM 
Servo 
On 
AL030 
Motor Crash 
Error 
The motor crashes the equipment, 
reaches the torque of P1-57 and 
exceeds the time set by P1-58. 
ALM 
Servo 
Off 
AL031 
Incorrect wiring 
of the motor 
power line U, V, 
W, GND 
Incorrect wiring of the motor power line 
U, V, W, GND or the connection 
between both is breakdown. 
ALM 
Servo 
Off 
AL034 
Internal 
communication 
of the encoder is 
in error 
1.  Internal communication error of the 
absolute encoder 
2.  Internal error of other type of 
encoder 
ALM 
Servo 
Off 
AL035 
Encoder 
Encoder temperature exceeds the 
ALM 
Servo