A5011 Alarm in ABB ACS150 Drive VFD

A5011 in the ABB ACS150 Drive indicates that the drive is being controlled from another control source (Remote mode). This alarm commonly appears when you try to start the drive from the keypad while the drive is set to Remote (REM) control mode. Since the keypad is not the active control source, the drive ignores the local start command and generates Alarm A5011.

A5011 Alarm in ABB ACS150 Drive VFD


This is not a hardware fault. It is a control mode mismatch between the selected control source and the start command.

Possible Causes

  • Drive is set to Remote (REM) control mode.
  • Start command is given from the keypad while the drive is in Remote mode.
  • Drive is configured to receive commands from external terminals.
  • Drive is controlled through fieldbus or PLC.
  • Incorrect control source selected.
  • Local/Remote mode accidentally changed.

Solutions

  1. Check whether the drive is in Local (LOC) or Remote (REM) control mode.
  2. Verify the control mode status on the display (LOC or REM).
  3. If you want to operate the drive from the keypad, press the LOC/REM button to change the control mode from Remote to Local.
  4. If the drive is intended to run in Remote mode, issue the start command from the configured external control source (digital inputs, PLC, or fieldbus).

Additional Information

The ABB ACS150 supports two control modes:

  • Local (LOC): The drive is controlled from the keypad.
  • Remote (REM): The drive is controlled by external inputs or a communication interface.

Alarm A5011 is generated when a keypad start command is attempted while the drive is configured for Remote control.

This alarm is informational and indicates that the selected control source does not match the command source.

Common Symptoms

  • Drive displays A5011.
  • Motor does not start from the keypad.
  • Display shows REM instead of LOC.
  • Start key on the keypad has no effect.
  • Drive operates normally from external controls.
  • Alarm disappears after changing to Local mode.
  • No hardware fault is present.

Recommended Troubleshooting Sequence

  1. Verify that the alarm is A5011.
  2. Check the display for LOC or REM status.
  3. Determine whether the drive should be controlled locally or remotely.
  4. If keypad control is required, press the LOC/REM button to switch to Local (LOC) mode.
  5. If remote control is required, leave the drive in REM mode and start it using the configured external control source.
  6. Confirm that the motor starts normally after using the correct control source.

A5011 Alarm Check Table

Check PointAction
Control modeVerify whether the drive is in LOC or REM mode
Display statusCheck for LOC or REM indication
Keypad operationUse only when the drive is in Local mode
External controlVerify PLC, digital inputs, or fieldbus if operating in Remote mode
LOC/REM buttonPress to switch between Local and Remote control as required

Preventive Maintenance Tips

  • Verify the selected control mode before starting the drive.
  • Train operators on the difference between Local and Remote control modes.
  • Clearly identify the intended control source for the application.
  • Check control mode after parameter changes or commissioning.
  • Ensure external control devices are functioning correctly when operating in Remote mode.
  • Avoid switching control modes unintentionally during operation.
  • Record recurring A5011 alarms to identify operator or configuration issues.
  • Follow ABB operating procedures for switching between Local and Remote control.

Proper verification of the LOC/REM control mode, display status, and selected control source will help prevent recurring A5011 alarms in ABB ACS150 drives, ensuring reliable operation whether the drive is controlled from the keypad or an external control system.

Comments

Post a Comment

Popular posts from this blog

Allen Bradley Kinetix 5500 Drive Fault Codes List

Complete guide to Allen Bradley Kinetix 5500 fault codes. Troubleshoot FLT codes, Single-Cable (DSL) feedback errors, shared bus faults, and perform diagnostics via Studio 5000. Kinetix 5500 Fault Codes Reference Table Kinetix 5500 Fault Codes Reference Table Kinetix 5500 Fault Codes Reference Table Fault Code and Meaning Cause and Remedy FLT S03 – MTR OVERSPEED FL Motor Overspeed Factory Limit Fault Cause: Motor speed has exceeded 125% of its maximum speed. Remedy: Check control loop tuning. FLT S04 – MTR OVERSPEED UL Motor Overspeed User Limit Fault Cause: Motor speed has exceeded motor overspeed user limit. Remedy: Check control loop tuning. Increase the Motor Overspeed UL attribute value. FLT S05 – MTR OVERTEMP FL Motor Overtemperature Factory Limit Fault Cause: Calculations based ...
Read more

Danfoss VACON 100 FLOW Drive Fault Codes List

Access the complete reference guide for Danfoss VACON 100 FLOW drive fault codes. Learn to diagnose Multipump communication errors, dry run faults, and use Vacon Live software. VACON 100 FLOW Fault Codes Reference Table VACON 100 FLOW Faults and Alarms VACON 100 FLOW - Fault Tracing Fault Code and Meaning Cause and Remedy Fault Code 1, ID 1 Overcurrent (Hardware Fault) Cause: There is too high a current (> 4 × IH) in the motor cable. a sudden heavy load increase a short circuit in the motor cables the motor is not the correct type the parameter settings are not properly made Remedy: Check the loading. Check the motor. Check the cables and connections. Make an identification run. Set the acceleration time longer (P3.4.1.2 and P3.4.2.2). Fault Code 1, ID 2 Overcurrent (Software Fault...
Read more

ABB ACH580 Drive Fault Codes List

Access the complete reference guide for ABB ACH580 HVAC drive fault codes. Learn to diagnose issues via the Hand-Off-Auto panel, BACnet integration, and Fireman’s Override. The ABB ACH580 is the industry-standard flagship drive for HVACR applications. Designed to control air handling units, cooling towers, and chillers, it ensures critical comfort and safety in buildings. When a malfunction occurs, the dedicated Hand-Off-Auto (HOA) control panel displays a 4-digit code alongside plain-text diagnostics, often integrated directly into the Building Management System (BMS). This guide provides the most updated reference to help you interpret these codes and maintain building environmental standards. ACH580 Fault Codes Reference Table Use the search bar below or browse the table to identify your specific error code: ABB ACH580 Drive Fault Codes List ABB ACH580 Drive Fault Codes List Fault Code and Meaning Cause and Remedy A2B1...
Read more