Mitsubishi Electric MXZ-8A140VA Installationshandbuch Seite 11

7. Electrical work
[3] Incorrect systems
3-1. Group operation by sin-
gle remote controller
OC
BC
(3-branch type)
A B C
IC IC IC
RC
R
C
3-1. Plural indoor units cannot be operated by a single remote controller.
3-2. Different refrigerant systems cannot be connected together.
3-3. A M-NET adapter cannot be connected to an outdoor unit.
7.1. Outdoor unit (Fig. 7-1)
1 Remove the service panel.
2 Wire the cables referring to the Fig. 7-1.
A Earth terminal
B Terminal block
C Clamp
D Service panel
E Wire the cables so that they do not contact the center of the service panel or the gas valve.
7.2. Branch box/outdoor wire connection and outdoor power supply cord connection
Warning:
• Be sure to attach the terminal block covers/panel of the outdoor unit securely. If it is not attached correctly, it could result in a fire or an electric shock due to dust,
water, etc.
• Be sure to connect the power supply cords and the connecting wires for the indoor units, outdoor units, and branch boxes directly to the units (no intermediate
connections).
Intermediate connections can lead to communication errors if water enters the cords or wires and causes insufficient insulation to ground or a poor electrical
contact at the intermediate connection point.
(If an intermediate connection is necessary, be sure to take measures to prevent water from entering the cords and wires.)
Caution:
• Be careful not to make mis-wiring.
• Firmly tighten the terminal screws to prevent them from loosening.
• After tightening, pull the wires lightly to confirm that they not move.
• If the connecting wire is incorrectly connected to the terminal block, the unit does not operate normally.
• Connect wire from the branch box correctly to the terminal block.
• For future servicing, give extra length to connecting wire.
3-2. Group operation between different refrigerant systems
OC
BC BC
(3-branch type)
A B C A
IC IC
RC
3-3. Connection of M-NET adapter to outdoor unit
OC OC
BC
(3-branch type) (3-branch type)
B C A B
IC IC IC
RC RC
R
C
A
D
E
ADP Master controller
001
(G-50, etc.)
M-NET
Power supply unit
C
IC
R
C
B
L N S1 S2 S3
C
Fig. 7-1
Loosen terminal screw.
Terminal
Lead wire
block
Connection details
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