When a machine drops offline or reports a fault, the first question is not “who can drive there?” It is “what happened?” Remote diagnostics exist to answer that question with enough precision to plan the response.
What can be seen remotely
Connectivity, module status, sensor events, software state, and often a specific error condition. That is enough, in many cases, to distinguish a network issue from a jammed dispenser or a failed reader.
What still requires a person
Physical damage, cash handling, and many mechanical repairs still need a technician. Diagnostics do not replace field service. They make field service accurate: the right parts, the right skill, the right priority.
A technician who arrives already knowing the fault is faster than a technician who has to discover it on site.