Carrier 38QUS014DS2-2 Service Manual page 12

(4) External air duct design

Reserve external air duct, more flexible for the air supply.
(5) Built-in draining pump

Due to the improvement of structure, more convenient to repair or replace the draining pump.

Built-in draining pump to make sure condensed water drain out reliably.
(6) Terminals for alarm lamp and long-distance on-off controller connection are standard

Reserve terminals for the connection of alarm lamp and long-distance on-off controller, more human
control.
Draining Pump
9