Key points in this article
Common misunderstandings
Two widespread views on fault codes exist: over-worrying or ignoring them. The closer truth is clear communication speeds resolution; taking neither extreme is steady, and many faults are dissolved at the source by a simple timely action taken.
Signals worth noting
Some device changes are not urgent yet deserve a note. A practical test is closing the loop to drive improvement; when unsure, ask rather than assume. A professional check once costs less than experimenting alone with live equipment carrying current.
Safety always first
On cable damage, loose joints, or abnormal heat, stop and report at once. Not modifying parts yourself is responsible to all. This baseline can never be overstated around fault codes and the equipment they report on to users.
At acceptance, do not wave the code list through on faith. Trigger the common faults deliberately and confirm the system reports and clears them, because the moment a real one appears later, that signed checklist is what you will be held to.