ABB E-105: ABB MNS-MCC Error Code E-105

Symptoms

The adjustable speed drive (ACS880) within the MCC reports overcurrent fault F0001. The drive trips and the motor coasts to a stop. The fault code is displayed on the drive keypad.

Possible Causes

Rapid acceleration ramp causing current to exceed the drive limit
Motor cable short-circuit or ground fault at the drive output
Incorrect motor parameter settings (nominal current, power factor)
Mechanical load suddenly increased beyond the motor rated torque

Troubleshooting Steps

Step 1: Extend the acceleration ramp time in the drive parameters (typically group 22)
Current stays within 110% of motor nominal during acceleration
Step 2: Measure the motor cable insulation and check for shorts at the drive output terminals
Megger reading >10 MOhm and no phase-to-phase shorts detected
Step 3: Verify motor nameplate data is correctly entered into drive parameter group 99
Rated current, voltage, frequency, and speed match the motor nameplate exactly
Step 4: Inspect the mechanical load for jams, seized bearings, or excessive friction
Load rotates freely and torque requirement is within motor capability

How to Reset

Reset the drive fault by pressing the reset button on the keypad or via the fieldbus command. Restart the drive only after confirming the cause is resolved and parameters are correct.

Common Replacement Parts

3AUA0000103501: ABB ACS880 drive control board (Firmware must match the existing drive revision)

Frequently Asked Questions

Q: What is the default overcurrent limit in ACS880?
The default is approximately 200% of the drive nominal current, but this is influenced by the motor parameter settings.
Q: Can I disable overcurrent protection?
No. Overcurrent protection is integral to IGBT protection and cannot be disabled. Doing so would destroy the drive.

ABB MNS-MCC Error Code E-105