The invention relates to a closing system comprising at least one door provided with at least one displaceable closure element and a closure element receiving member. The at least one closing element of the door lock projects into the closing element receiving member when the closing system is in the closed state. The invention also relates to a keyless entry system for controlling the access of a chamber door, and to a method for controlling the closing state of the closing system comprising at least one door provided with a displaceable closing element and a closing element receiving member, whereby the at least one closing element of the door lock projects into closing element receiving member when the closing system is in the closed state, a force sensor and an evaluation unit. The closing system can be switched, in the closed state, from a first operational state to a second operational state.