A remote check routine must use the HZSCHECK macro REQUEST=OPSTART or OPCOMPLETE to communicate to IBM® Health Checker for z/OS® when the check is starting or stopping itself because the check has completed an iteration:

HZSCHECK REMOTE=YES,
         HANDLE=handle,
         REQUEST=OPSTART or REQUEST=OPCOMPLETE  

For information, see HZSCHECK macro — HZS Check command request.