Why does a Liebherr crane display B-pin or C-pin error W0093?

Error W0093 appears when the crane's control system detects that a telescope boom pin is not fully engaged or locked in its designated position. The B-pin and C-pin are critical safety components that secure telescopic boom sections during extension and retraction operations. When these pins are not properly seated, the crane's safety system prevents boom operation to avoid potential section separation or collapse.