ACS 550 Fault codes 2
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ABB ACS 500 Drives Fault Detection and Reporting
ABB ACS 500 drives detect fault conditions and report them through various means: green and red LEDs on the drive, the status LED on the control panel, the control panel display if available, as well as through Fault Word and Alarm Word parameter bits (from 0305 to 0309). Different displays are used depending on the severity of the fault, and the drive can be directed to ignore faults, report them as alarms, or report them as faults.
Red LED – Faults: When a serious fault is detected, the drive activates the red LED, a steady red status LED is shown on the control panel, an appropriate Fault Word parameter is set, the control panel display is updated with the fault code, and the motor is stopped. The fault code can be cleared from the control panel by pressing specific buttons.
Flashing Green LED – Alarms: For less severe faults, the indicator is only advisory, and the drive reports that it has detected an unusual condition. For these situations, the green LED on the drive and on the control panel if present flashes, an appropriate Alarm Word parameter is set, and the control panel display is updated with the alarm code and/or name. Alarm messages disappear after a few seconds but periodically return as long as the alarm condition persists.
Fault Reset: The ACS550 can be configured to automatically reset certain faults. Faults with a flashing red LED can be reset by turning off the power for 5 minutes; faults with a steady red LED can be reset by fixing the issue and pressing the reset button or by turning off the power for 5 minutes.
History: The last three fault codes are recorded in specific parameters along with additional data to assist in troubleshooting. Specific steps using the control panel are followed to clear the fault history.
This summary provides basic information on the fault diagnosis and notification mechanisms of ABB ACS 500 drives, how fault and alarm conditions are displayed, and how faults can be reset.
Fault Code 14; External Fault 1: The digital input defined to signal the first external fault is active. Check the 3003 EXTERNAL FAULT 1 parameter.
Fault Code 15; External Fault 2: The digital input defined to signal the second external fault is active. Check the 3004 EXTERNAL FAULT 2 parameter.
Fault Code 16; Earth Fault: A potential earth fault has been detected in the motor or motor cables. The drive monitors for earth faults while running and not running. More sensitive detection is done while not running, which can produce false positives. Check for faults in the input cables, ensure the motor cable length does not exceed the maximum specified. You can disable the response to fault monitoring when not running using the 3023 WIRING FAULT parameter. To completely disable earth fault monitoring, use the 3017 EARTH FAULT parameter. Note: Disabling earth fault monitoring may void the warranty.
Fault Code 18; Thermal Fault: Internal fault. The thermistor used to measure the internal temperature of the drive is open or short-circuited. Contact your local ABB representative.
Fault Code 19; OPEX Connection: Internal fault. A communication problem related to the fiber optic connection between the control and OINT panels has been detected. Contact your local ABB representative.
Fault Code 20; OPEX Power: Internal fault. An unusually low voltage has been detected in the OINT power supply. Contact your local ABB representative.
Fault Code 21; Current Measurement: Internal fault. Current measurement is out of range. Contact your local ABB representative.
Fault Code 22; Supply Phase: The fluctuation voltage in the DC link is too high. Check and correct for a missing mains phase or blown fuse.
Fault Code 23; Encoder Fault: The drive is not detecting a valid encoder signal. Check the presence and correct connection of the encoder, whether the voltage logic levels are within the specified range, if there is a running and correctly connected Pulse Encoder Interface Module (OTAC-01), and if a wrong value has been entered in the 5001 PULSE NR parameter, this fault can only be detected if this results in a calculated slip more than four times the nominal slip of the motor. If an encoder is not used but the 5002 ENCODER ENABLE parameter is set to 1 (ENABLE), check this condition.
Fault Code 24; Overspeed: The motor speed is more than 120% of the magnitude of the 2001 MINIMUM SPEED or 2002 MAXIMUM SPEED. Check the settings of parameters 2001 and 2002, the adequacy of the motor's braking torque, the applicability of torque control, and the need for a brake chopper and resistor.
Fault Code 26; Drive ID: Internal fault. Configuration Block Drive ID is invalid. Contact your local ABB representative.
Fault Code 27; Configuration File: There is an error in the internal configuration file. Contact your local ABB representative.
Fault Code 28; Serial 1 Fault: The fieldbus communication has timed out. Check and correct the fault setup (3018 COMM FAULT FUNC and 3019 COMM FAULT TIME), communication settings (Group 51: EXT COMM MODULE or Group 53: EFB PROTOCOL if applicable), and bad connections or noise on the line.
Fault Code 34; Motor Phase: There is a fault in the motor circuit. One of the motor phases is missing. Check and correct the motor fault, motor cable fault, thermal relay fault (if used), and internal faults.
Fault Code 35; Output Wiring: A potential power wiring fault has been detected. The drive monitors for a wrong connection between the drive input power and drive output when not running. Check correct input wiring – that the line voltage is NOT connected to the drive output. If the input power is a delta-grounded system and the motor cable capacitance is large, this fault may be falsely declared. You can use the 3023 WIRING FAULT parameter to disable this fault.
Fault Code 36; Incompatible Software: The drive cannot use the loaded software. Internal fault or the loaded software is not compatible with the drive. Call your support representative.
Fault Code 37; Control Board Overheating: The drive control board has overheated. The fault trip limit is 88 °C. Check and correct for excessive ambient temperature, fan failure, obstructions in airflow. This does not apply to drives with an OMIO control board.
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