Ah man bad luck! Not sure about a Solid Red LED...... This is from the manual:

12. Protection Functions

To improve reliability, the drive incorporates some built-in protection functions. The AM882 uses
one RED LED to indicate what protection has been activated. The periodic time of RED is 5 s
(seconds), and how many times the RED turns on indicates what protection has been activated.
Because only one protection can be displayed by RED LED, so the drive will decide what error to
display according to their priorities. See the following Protection Indications table for displaying
priorities.

Over-current Protection

Over-current protection will be activated when continuous current exceeds the limit or in case of
short circuit between motor coils or between motor coil and ground, and RED LED will turn on once
within each periodic time (5 s).

Over-voltage Protection

When power supply voltage exceeds 90±1 VDC, protection will be activated and RED LED will
turn on twice within each periodic time (5 s).

Phase Error Protection

Motor power lines wrong & not connected will activate this protection. RED LED will turn on four
times within each periodic time (5 s).

Sensorless Stall Protection

The AM882 can detect the motor stall status using if motor shaft speed is above 300RPM. When the
detection is active, RED LED will blink five times within each periodic time (5s).
Attention: When above protections are active, the motor shaft will be free or the LED will blink.

Hope you dont have to replace it