
ACS550-01/U1 User’s Manual 263
Diagnostics
Alarm codes (Basic Control Panel)
The Basic Control Panel indicates control panel alarms with a code, A5xxx. The
following table lists the alarm codes and descriptions.
2023 EMERGENCY
STOP
Emergency stop activated.
2024
ENCODER ERROR The drive is not detecting a valid encoder signal. Check for and
correct:
• Encoder presence and proper connection (reverse wired, loose
connection,or short circuit).
• Voltage logic levels are outside of the specified range.
• A working and properly connected Pulse Encoder Interface Module,
OTAC-01.
• Wrong value entered in parameter 5001
PULSE NR. A wrong value
will only be detected if the error is such that the calculated slip is
greater than 4 times the rated slip of the motor.
• Encoder is not being used, but parameter 5002
ENCODER ENABLE =
1(
ENABLE).
2025
FIRST START Signals that a the drive is performing a First Start evaluation of motor
characteristics. This is normal the first time the motor is run after motor
parameters are entered or changed. See parameter 9910 ID RUN for a
description of motor models.
2026
RESERVED Not used.
2027 USER LOAD
CURVE
This alarm warns that the condition defined by parameter 3701 USER
LOAD C MODE has been valid longer than half of the time defined by
3703
USER LOAD C TIME.
2028 START DELAY Shown during the Start delay. See parameter 2113 START DELAY.
Note 1. Even when the relay output is configured to indicate alarm conditions (e.g. parameter
1401
RELAY OUTPUT 1 = 5 (ALARM) or 16 (FLT/ALARM)), this alarm is not indicated by a relay
output.
Code Description
5001 Drive is not responding.
5002 The communication profile is incompatible with the drive.
5010 The panel’s parameter backup file is corrupted.
5011 Drive is controlled from another source.
5012 Rotation direction is locked.
5013 Button is disabled, because start is inhibited.
5014 Button is disabled, because drive is faulted.
5015 Button is disabled, because local mode lock is on.
5018 Parameter default value can’t be found.
5019 Writing a non-zero value is prohibited (can only write a zero value).
5020 Group or parameter does not exist or parameter value is inconsistent.
5021 Group or parameter is hidden.
5022 Group or parameter is write protected.
5023 Modification is not allowed while the drive is running.
Alarm
code
Display Description
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