Blue Star Ac Error Code : Ba / Bb – Inverter Drive Start Error (Auto Reset)

You may not be aware that your ABB ACS850 drive has a hidden feature that can put your personnel and equipment at risk.

When the drive trips due to an Emergency Stop and then automatically restarts when the stop is released, it’s known as a Ba/Bb Inverter Drive Start Error or auto-start issue.

This malfunction warning indicates that the drive has stopped and then restarted, which can lead to unexpected motor startups. But what’s causing this auto-reset, and how can you prevent it from happening in the first place?

Key Takeaways

The Inverter Drive Start Error, or auto-start issue, occurs when the ABB ACS850 drive trips and restarts automatically after an Emergency Stop.
Wiring emergency stop contacts into the start circuit can cause the drive to restart automatically, leading to auto-start issues.
Misconfigured XTOS inputs, specifically the Safe Torque Off function, can trigger auto-starting and pose a risk to personnel and equipment.
Configuring the variable speed drives to latch in the start and clear it on a stop or trip can prevent auto-starting in Local Mode.
Implementing a 3-wire control and ensuring emergency stop contacts aren’t wired into the start circuit can prevent auto-start errors and ensure safe operation.

Understanding the Inverter Drive Start Error

When operating an ABB ACS850 drive in Local Mode from the Control Display Panel (CDP), you may encounter an Inverter Drive Start Error, also known as an auto-start issue.

This MALFUNCTION WARNING indicates that the drive has tripped or stopped due to an Emergency Stop and then automatically restarts when the Emergency Stop is released. Upon receiving the start command, the drive should normally restart.

However, if the auto-start issue occurs, you’ll see error codes indicating the problem. Crucial to rectify this issue promptly, as it can cause unexpected motor startups, posing a risk to personnel and equipment.

Also, Read: Blue Star Ac Error Code : B6 / B7 – Inverter Compressor Overcurrent Error (Auto Reset)

Causes of Auto-Reset and Safety Concerns

Because the Inverter Drive Start Error can lead to unexpected motor startups, it’s crucial to identify its root causes to prevent accidents and equipment damage.

You need to be aware that wiring emergency stop contacts into the start circuit can cause the drive to restart automatically, leading to auto-start issues.

Additionally, a latched CDP start command or misconfigured XTOS inputs, specifically the Safe Torque Off function, can also trigger auto-starting.

To prevent these issues, consider using a 3-wire control and configuring the drive to latch in the start and clear it on a stop or trip.

Momentary start contacts with motor control or MCC sealing in the start can also help prevent the start circuit from holding the start contacts closed, causing the motor to cycle or restart.

Also, Read: Blue Star Ac Error Code : B0 / B1 – Inverter Compressor Overload Error (Auto Reset)

Wiring and Logic Configuration Issues

The ABB ACS850 drive’s wiring and logic configuration can lead to auto-start issues, particularly if the emergency stop contacts are wired into the start circuit.

This can cause the motor to cycle or restart unexpectedly. To avoid this, you should consider the following:

Using momentary start contacts with motor control or MCC sealing in the start circuit can prevent auto-starting.
A 3-wire control may be necessary to prevent auto-starting, especially when the drives are operated in Local Mode from the CDP.
Configuring the variable speed drives to latch in the start and clear it on a stop or trip can resolve issues with the CDP start command being latched, causing the drive to auto-start.

Possible Solutions and Configurations

You’ve explored the wiring and logic configuration issues that can lead to auto-start problems with your ABB ACS850 drive.

Now, it’s time to discuss possible solutions and configurations to prevent these errors. One approach is to configure the variable speed drives to latch in the start and clear it on a stop or trip, ensuring the drive doesn’t auto-start in Local Mode.

Alternatively, you can use a simple start button circuit with a latching relay or implement a 3-wire control to prevent auto-starting.

Additionally, checking the XTOS input settings, specifically the Safe Torque Off function, may resolve the issue. If needed, contact ABB support for guidance on this function and its interaction with the CDP start command.

Also, Read: Blue Star Ac Error Code : C7 / C8 – Communication Error in Inverter Drive (Manual Check)

Preventing Auto-Start and Ensuring Safe Operation

Implementing preventative measures is crucial to avoiding auto-start errors and guaranteeing safe operation of your ABB ACS850 drive.

To prevent auto-starting, you can take several steps.

Configure your drive to latch in the start and clear it on a stop or trip, guaranteeing motor protection and drive safety.
Use a 3-wire control instead of a single digital output for Start and Stop, eliminating the need for momentary start contacts and reducing fault detection issues.
Guarantee emergency stop contacts aren’t wired into the start circuit, preventing the drive from restarting automatically and reducing the risk of accidents.

Frequently Asked Questions

How Do You Reset the Fault on ABB Drive?

To reset the fault on your ABB drive, you’ll need to isolate the malfunction, identify the root cause, and clear the fault by pressing the “Reset” button or sending a reset command from the PLC, ensuring the drive is in the STOP state.

How to Fix P3 Error in Blue Star AC?

Get to the root of the issue by tackling the P3 error in your Blue Star AC with finesse. For AC troubleshooting, investigate Inverter faults, and pinpoint the culprit through error diagnosis – is it a wiring glitch or a Safe Torque Off function misconfig?

How Do I Factory Reset My ABB Drive?

You’ll need to access the drive’s settings to perform a factory reset on your ABB drive; navigate to the Resetting options, select Factory defaults, and confirm to restore the Drive parameter to its original settings.

What Is the Error Code L1 on a Blue Star Inverter AC?

You’re experiencing an L1 error on your Blue Star inverter AC, which typically indicates an inverter malfunction. This can cause cooling issues, preventing your air conditioner from functioning properly. Check the inverter’s internal temperature and electrical connections to resolve the problem.

Conclusion

As you wrap up troubleshooting the Ba/Bb Inverter Drive Start Error, remember that a stitch in time saves nine. A single misconfigured wire or overlooked logic setting can spark a chain reaction of auto-resets, putting your team and equipment at risk. By addressing wiring and logic configuration issues, and implementing preventative measures, you’ll be well on your way to a smooth, safe operation – and a clear conscience.