Error code 221 - 237 is user defined error codes, defined by the advanced warning system.
Note: Since these error codes are user defined, we can't explain WHY they are triggered without looking into your settings and a logfile. See, Live-logger.
Stored error codes defined by the advanced warning system.
Example of settings caused the above error codes in system.
•221, "Warning system CH 1"
•222, "Warning system CH 2"
•223, "Warning system CH 3"
•224, "Warning system CH 4"
•225, "Warning system CH 5"
•226, "Warning system CH 6"
•227, "Warning system CH 7"
•228, "Warning system CH 8"
•229, "Warning system CH 9"
•231, "Warning system CH 10"
•232, "Warning system CH 11"
•233, "Warning system CH 12"
•234, "Warning system CH 13"
•235, "Warning system CH 14"
•236, "Warning system CH 15"
•237, "Warning system CH 16"