ASDA-A2 Chapter 10 Troubleshooting
10-14 Revision February, 2017
AL018：Abnormal Signal Output
Causes Checking Method Corrective Actions
The encoder is in error
and cause the abnormal
signal output
Check the fault records (P4-00~P4-
05). See if the alarm exists with the
encoder error (AL011, AL024,
AL025, AL026)
Conduct the corrective actions of
AL.011, AL.024, AL.025, AL.026
The output pulse
exceeds the hardware
allowable range.
Check if the following conditions
produce:
P1-76 < Motor Speed or
6
1019.8 4 461P
60
Speed Motor
Correctly set parameter P1-76 and
P1-46:
P1-76 > Motor Speed or
6
1019.8 4 461P
60
Speed Motor
AL019：Serial Communication Error
Causes Checking Method Corrective Actions
Improper setting of the
communication
parameter
Check the setting value of
communication parameter
Correctly set the parameter value
Incorrect communication
address
Check the communication address
Correctly set the communication
address
Incorrect communication
value
Check the accessing value Correctly set the value
AL020：Serial Communication Time Out
Causes Checking Method Corrective Actions
Improper setting of the
time-out parameter
Check the parameter setting Correctly set the value
The drive hasn’t received
the communication
command for a long time.
Check if the communication cable is
loose or broken.
Correct wiring
AL022：Main circuit power leak phase
Causes Checking Method Corrective Actions
The main circuit power is
abnormal
Check if RST power cable is loose
or does not connect to the power.
This alarm occurs when no power
connects to 3-phase for under 1.5
kW (included) servo drive. No
power connects to single phase for
2 kW (included or above) servo
drive, this alarm occurs.
Make sure it applies to the power. If
issue persists, please send the
drive back to the distributors or
contact with Delta.
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