Pumping Down; Connecting An Interface (Option) To The Air Conditioner - Mitsubishi MLP-444WU Installation Manual

6. PUMPING DOWN

Refer to the procedures indicated in the installation manual of the outdoor unit.
When the refrigeration circuit has a leak, do not execute pump down with the compressor.
When pumping down the refrigerant, stop the compressor before disconnecting the refrigerant pipes.
The compressor may burst if air etc. get into it.

7. CONNECTING AN INTERFACE (OPTION) TO THE AIR CONDITIONER

• Connect an interface to the indoor control board of an air conditioner with a connecting cable.
• Cutting or extending the connecting cable of the interface results in defects in connecting. Do not bundle the connecting cable together with power supply cord, indoor/
outdoor connecting wire, and/or ground wire. Keep as much distance as possible between the connecting cable and those wires.
• The thin part of the connecting cable should be stored and placed where customers cannot touch it.
1) Fix the cable tie to the connecting cable at 3-15/16 in. (100 mm) from the edge of the insulation coating part. Attach the mounting cord clamp (medium) to the interface
side of the cable tie.
2) Remove the grille. (If the grille has been already installed)
3) Remove the electrical cover (1), (2).
Refer to 2-4. CONNECTING WIRES FOR INDOOR UNIT.
4) Slide out the indoor control board, and connect the connecting cable to CN105 and/or CN24 on the indoor control board.
5) Remove the screw shown in the photo blow. Route the connecting cable according to the photo below. Fix the mounting cord clamp (medium), which has attached to
the connecting cable, with the screw.
En-11
WARNING
(A)
If you attach this optional part to the model, fold (A) a few times and cut it.
Cove the cut part with protective tape
Thin part of the connecting cable. Place this part
where customers cannot touch it.
Room air conditioner
Indoor control board
CN105 for interface
CN24 for connector cable
Mounting cord clamp (medium)
Connecting
cable
Q
.
Q
Main body of an interface
Connector
Thick part of the connecting cable
Cable tie
3-15/16 in.
(100 mm)
Insulation coating part
Connecting cable
Cable tie
Mounting cord clamp
(medium)
Screw