Carrier 40QSM009DS Service Manual page 16

2.3.2.6 Build-in Drain Pump
 The drain pump can lift the condensing water up to 750mm upmost.
 It's convenient to install drainage piping under most space condition.
2.3.2.7Terminals 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.
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