E-54 Communication Error

The EN608 series inverter has a built-in fan inverter that communicates directly with the main inverter. If this communication is interrupted for any reason, the E-54 error may appear on the display.

Follow the steps below to diagnose and resolve the issue:

!Perform any service if;
• Person going to work on the compressor is certified,
• Compressor completely shut down and electrically isolated
• All compressed air is discharged inside the compressor
• Compressor is completely isolated from the compressed air system.

Check Input Voltage

• Ensure the input voltage is within the permissible range. If it’s too high or too low, adjust it to the correct working voltage.

!220V rated compressor phase to phase input voltages must be in between 208V & 230V
480V rated compressor phase to phase input voltages must be in between 460V & 505V
575V rated compressor phase to phase input voltages must be in between 560V & 615V

Verify Line Reactor Installation

• Confirm that the correct line reactor is installed and functioning properly.

Inspect Cooling Fans

• Make sure the cooling fan(s) are operating correctly.

• Replace any faulty fan(s) as needed.

Check Communication Connection

• The fan inverter has a dedicated Ethernet communication terminal.
  

• Connect the Ethernet cable to this terminal and observe if any error persists on the display of the compressor.

• If the error code reappears, please contact US Air Compressor Service Team for further assistance.

Connect the compressor with US Air Connect App

• Try to connect the compressor with the US Air Connect app for monitoring.

• If the Bluetooth module does not power up, check the DC output voltage at the Bluetooth power terminals on the control board.

• If there is no voltage output, contact the US Air Compressor Technical Support Team for assistance.