9. The followings are procedures of air running. (1)Set the ENGINE/REMOTE operationselector switch in the ENGINE position. (Alarm panel in engine room) (2)Open thepressure indicator cocks of all the cylinders. (3)Set the start/stop lever in the STOPposition. (4)Hold the START switch pressing for 2 to 3 seconds to effect air running.Which one is correct?
(A) (1)→(2)→(3)→(4)
(B) (1)→(4)→(3)→(2)
(C) (4)→(2)→(3)→(1)
(D) (4)→(2)→(1)→(3)