How to Fix ABB ACS550 Alarm A5014 Local Lock Disabled Fix

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Seeing A5014 on your ABB ACS550? This "Local Lock" alarm prevents you from using the keypad buttons. Learn how to unlock your drive using Parameter 1606.

How to Fix ABB ACS550 Alarm A5014 Local Lock Disabled Fix

 

How to Fix ABB ACS550 Alarm A5014: Unlocking the Keypad

Are you trying to switch your ABB ACS550 to "Local" mode or hit the "Start" button, only to have the screen flash A5014 at you? It feels like the drive is ignoring you, but there is a very specific reason for this behavior.

In the ABB manual, A5014 stands for "Local Lock." It means the drive has been programmed to disable the keypad's LOC/REM, Start/Stop, and Direction buttons. It is a software "padlock" usually put in place by engineers to prevent operators from taking manual control of a critical process. Let’s look at how to take that lock off.

Why is the A5014 Alarm Appearing?

The ACS550 allows for a "Local Lock" function to be assigned to a specific parameter or a digital input. The A5014 code appears when:

  • Parameter 1606 is set to "ON" or "COMM."
  • A Digital Input (like DI4 or DI5) is assigned to lock the keypad, and that input is currently active.
  • Remote Software (like a PLC or Scada system) has sent a command to lock the local control.

Step-by-Step Troubleshooting for A5014

1. The "Main Suspect": Parameter 1606

This is the most common reason for the A5014 alarm.

  • Navigate to the Parameters menu on your keypad.
  • Go to Group 16 (System Controls).
  • Find Parameter 1606 (LOCAL LOCK).
  • If this is set to [1] ON, the keypad is permanently locked.
  • Change it to [0] NOT SEL to restore full control to your keypad.

2. Check for "Digital Input" Locking

Sometimes, the local lock is tied to a physical switch on the cabinet door.

  • Look at the value of Parameter 1606 again.
  • If it is set to [2] DI1 through [6] DI5, the drive is waiting for that specific terminal to be high (24V) or low before it unlocks.
  • Try flipping the physical "Local/Remote" selector switch on your control panel, or change Parameter 1606 back to NOT SEL to bypass the switch.

3. PLC/Fieldbus Lock

If your drive is connected to a network (like Modbus, Profibus, or Ethernet), the PLC can "force" a local lock to prevent maintenance personnel from interfering with the automated logic.

  • If Parameter 1606 is set to [7] COMM, the lock is coming from your network.
  • To take control manually for troubleshooting, you will need to change 1606 to NOT SEL temporarily.

A5013 vs. A5014: What's the difference?

Technicians often confuse these two because they both prevent the drive from starting.

  • A5013 (Start Inhibit): Means the drive is waiting for a safety signal (like an E-stop or Run Enable) before it can start.
  • A5014 (Local Lock): Means the drive could start, but it won't let you use the keypad to do it.

How to Reset the A5014 Alarm

  1. Go to Parameter 1606 and set it to NOT SEL.
  2. The alarm should disappear instantly from the screen.
  3. Press the LOC/REM button. The top of the screen should now change from "REM" to "LOC," and your green Start button will be active.

Summary

The ABB ACS550 A5014 alarm is simply a settings mismatch. It’s the drive’s way of saying, "I've been told not to listen to the keypad." By checking Parameter 1606 in the System Controls group, you can remove the digital padlock and get back to testing your motor in seconds.

 

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