The cited LG article supports drain hose and drain pump filter checks, not a full maintenance schedule.
Safety and recalls
No recall is attached to this support scope unless a separate official LG or government recall notice is matched.
Primary citations
OE Error Code - Front Loader Washer
LG documents OE on front-loader washers as unable to drain water and points to drain hose restriction, drain pump filter clogging, and freezing as relevant checks.