Hello, sorry for replying late.
It is Dx split system indeed.
Technicians did check the cooling coil and it's not clogged also they cleaned filters...
Outdoor unit : 16,030 / 32,000 / 38,000 btu/h
Indoor unit : Air Flow Rate 1130 / 988 / 847 cfm ; Max External Static Pressure ~ 0,609 inch wc...