PURPOSE: To positively prevent a human from receiving electric shock by letting the main contactor of a feeding circuit be opened interlocked with the release of a locking member when the control section of an air conditioner is drawn out, and thereby concurrently constituting the discharge circuit of each capacitor within the air conditioner to be closed.

CONSTITUTION: When an air conditioning control section 5 is drawn out of an air conditioner 4 for inspection and repair, a lock section 44 is opened first so that the air conditioner 5 is unlocked. When No.1 limit switch LS 43 is opened interlocked with the aforesaid unlocking operation, No.1 relay 45 is de-magnetized so as to let its contact 45a be opened. Following which, the air conditioning control section is drawn out to the inspection and repair position. In this case, the stationary contact piece 22 and the movable contact piece 23 of a disconnector are separated so that the receiving circuit and the contacting circuit of the air conditioning control section 5 are opened, and No.2 switch LS 24 is concurrently closed by an operating position detecting cam 25. By this constitution, No.2 relays 18 and 20 are energized so as to let their contact points 18a and 20a be closed so that the charging energy of the capacitors 9 and 10 is consumed by discharging resistors 7 and 8.