Haier 3U55S2SR3FA Manuel D'installation page 30

Pump Down Operation
In order to protect the environment, be sure to pump down when relocating or disposing of the unit.
Wiring work
1. Electric wiring
and the communication wire
2. Wiring method
3. Wiring method of outdoor unit:
Remove the cover of terminal box and clamp.
Power Line
Connect respectively the live wire, neutral wire, ground wire to the L/N on terminal block and grounding screw on metal sheet.
Communication Line between Indoor & Outdoor
E.g. Connect respectively the terminal 1/2/3/GND of Indoor B to the 1/2/3 on Terminal B and grounding screw on metal sheet of Outdoor.
Max. 5 indoor units for 5U outdoor and the rest outdoors follow the same logic.
Reinstall the clamp and cover of terminal box according to the Installation Manual, after the connection above-mentioned done
Note: Power cord and communication wire are provided by consumers themselves.
.
(More than 30m, choose H07RN-F4G 4.0mm²)