Some technical failures include mechanical failures of the aircraft, maintenance, logistical problems with the equipment. Suppose Copa Airlines is responsible for the interruption of the route, due to causes attributable.
In that case, you may request a total or partial refund of your ticket. For instance, this type of refund is called involuntary.
When the refund is involuntary, then you can request a refund for a ticket. But for that specific fare rule, it is not refundable. In these cases, there is no penalty for charges.