E27 indicates a door frame self-learning failure.

Ⅰ. The commonly used NICE900 door machine inverters mainly include the following three types, with different output power:

NICE-D-A-SOP2 (200W)

NICE-D-A-SOP4 (400W)

NICE-D-A-SOP7 (750W)

Ⅱ. Fault Causes:

1.The learned door width data from self-learning is less than 20.

2. Distance control operation is performed before door width self-learning.

Ⅲ. Troubleshooting Methods:

1.Check the elevator door operator encoder wiring and related parameters.

2.Inspect the mechanical system of the elevator door operator.

3.Perform door width pulse self-learning before distance control operation.