OI Roundtable

ABB ACS140 Fault, Alarm, and Error Codes

Alarm and Fault Displays

Here is some good general info from their service manual. The seven-segment display unit of control panel indicates alarms and faults using codes "ALxx" or "FLxx", where xx is the corresponding alarm or fault code. Alarms 1-7 arise from button operation. Green LED blinks for AL10-21, meaning that the ACS140 cannot fully follow the control commands. The faults are indicated by red LED. The alarm and fault messages disappear by pressing MENU, ENTER or the arrow buttons of the control panel. The message will reappear after a few seconds if the keypad is not touched and the alarm or fault is still active. Last three fault codes are stored into parameters 0128-0130. These fault memories can be cleared from the control panel by pressing UP and DOWN buttons simultaneously in parameter set mode.

(https://www.obsoleteindustrial.com/i24/ACS140-keypad.png)

Fault Resetting

When the red LED of the ACS140 is on or blinking, a fault is active!!!

When the green LED of the ACS140 is blinking, an alarm is active!!!

Resetting or clearing a fault is half the battle, the other hand is clearing the error and removing the problem all together. Faults that are indicated by a red blinking LED are reset by turning the power off for a while. Other faults (indicated by red static LED) can be reset either from the control panel, by digital input or serial communication, or switching the supply voltage off for a while. When the fault has been removed, the motor can be started. The ACS140 can be configured to automatically reset certain faults. Refer to parameter group 31 AUTOMATIC RESET.


It is important to remember that if an external source for start command is selected and is still active, the ACS140 may start immediately after a fault reset.


ALARM CODE LIST

• AL 1 Parameter upload/download failed.
• AL 2 Operation not allowed while start is active.
• AL 3 Operation not allowed in current control mode (Local or Remote).
• AL 5 Start/Stop/Direction or reference from control panel is not followed. Possible causes: ï Remote mode: parameters disable the buttons (See APPENDIX.) ï Local mode: START/STOP button interlocked from digital inputs.
• AL 6 Operation not allowed. Parameter 1602 PARAMETER LOCK is active.
• AL 7 Use of factory macro disables operation.
• AL10* Overcurrent controller active.
• AL11* Overvoltage controller active.
• AL12* Undervoltage controller active.
• AL13 Direction lock. See parameter 1003 DIRECTION.
• AL14 Serial communication loss alarm, see ACS140 RS485 and RS232 Adapter Installation and Start-up Guide.
• AL15* Modbus exception response is sent through serial communication.
• AL16 Analogue input 1 loss. Analogue input 1 value is less than MINIMUM AI1 (1301). See also parameters 3001 AI<MIN FUNCTION and 3013 AI1 FAULT LIMIT.
• AL17 Analogue input 2 loss. Analogue input 2 value is less than MINIMUM AI2 (1306). See also parameters 3001 AI<MIN FUNCTION and 3014 AI2 FAULT LIMIT.
• AL18* Panel loss. Panel is disconnected when Start/Stop/Dir or reference is coming from panel. See parameter 3002 PANEL LOSS and APPENDIX of manual.
• AL19* Hardware overtemperature (at 95 % of the trip limit).
• AL20* Motor overtemperature (at 95 % of the trip limit), see 3004 MOTOR THERM PROT.
• AL21 Motor stall alarm. See parameter 3009 STALL FUNCTION.

Note! The Alarms marked with an asterisk  (*) will be shown only if parameter 1608 DISPLAY ALARMS is set to 1(YES) so you may not see them depending on your setting

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FAULT CODE LIST

• FL 1 Overcurrent: ï Possible mechanical problem. Check for: Acceleration and/or deceleration times may be too short. OR Supply disturbances.
• FL 2 DC overvoltage: Check for: Input voltage too high. OR Deceleration time may be too short.
• FL 3 ACS140 overtemperature: Check for Ambient temperature too high. OR Severe overload.
• FL 4 * Fault current: Check for: Output earth fault (200 V units). OR Short circuit. OR Supply disturbances.
• FL 5 Output overload.
• FL 6 DC undervoltage.
• FL 7 Analogue input 1 fault. Analogue input 1 value is less than MINIMUM AI1 (1301). See also parameters 3001 AI<MIN FUNCTION and 3013 AI1 FAULT LIMIT.
• FL 8 Analogue input 2 fault. Analogue input 2 value is less than MINIMUM AI2 (1304). See also parameters 3001 AI<MIN FUNCTION and 3014 AI2 FAULT LIMIT.
• FL 9 Motor overtemperature. See parameters 3004-3008.
• FL10 Panel loss. Panel is disconnected when Start/Stop/Dir or reference is coming from panel. See parameter 3002 PANEL LOSS and APPENDIX in manual. Note! If FL10 is active when the power is turned off, the ACS140 will start in remote control (REM) when the power is turned back on.
• FL11 Parameters inconsistent. Possible fault situations: Check for MINIMUM AI1 > MAXIMUM AI1 (parameters 1301 and 1302) OR MINIMUM AI2 > MAXIMUM AI2 (parameters 1304 and 1305) OR MINIMUM FREQ > MAXIMUM FREQ (parameters 2007 and 2008)
• FL12 Motor stall. See parameter 3009 STALL FUNCTION.
• FL13 Serial communication loss.
• FL14 External fault is active. See parameter 3003 EXTERNAL FAULT.
• FL15 Output earth fault (400 V units).
• FL16 * DC bus ripple too large. Check supply.
• FL17 Analogue input out of range. Check AI level.
• FL18 - FL22 * Hardware error. Contact supplier.
• Full display blinking Serial link failure. Bad connection between the control panel and the ACS140. Check if the Serial communication parameters (group 52) have been altered. Keep panel connected and switch power off and then on again.

Note! Faults marked with an asterisk (*) are indicated by a red blinking LED are reset by turning the power off and on. Other faults are reset by pressing the START/STOP button. See also parameter 1604.

I'm sure this will be a big help for anyone troubleshooting the ACS140, Good Luck!

Again, nice job with these code lists for the 140 drive!

(https://www.obsoleteindustrial.com/i24/acs140-faults-alarms.png)