Midea MCD-18HRFN1-QRC4 Service Manual page 4

Features
1.4 External air duct design
Reserve external air duct, more flexible for the air supply.
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Built-in draining pump
1.5
 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.
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10
Draining Pump
Indoor Units