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5.3
Example of electrical connection between indoor and outdoor units
Before carrying out any work on the system, shut off the power supply at the main switch.
The electrical connection between the indoor and outdoor units must be made using the two low-voltage terminal boards: G and
S.
Connect "G" on the indoor unit terminal board with "G" on the outdoor unit terminal board.
Connect "S" on the indoor unit terminal board with "S" on the outdoor unit terminal board.
S
G
1 ph Single-phase power supply (depending on the model)
3 ph Three-phase power supply (depending on the model)
a
Once you have completed the connections between the indoor and outdoor units, put both electrical panels
back into place.
a
Keep the high- and low-voltage cables separate.
38 / EN
1 ph
3 ph
T
T
ON
ON
OFF
OFF
XXA
XXA
XXA
XXA
30mA
30mA
N
N
N
N
N
N
ATGBUS
...
SE
G
S
Electrical connections
1 ph
3 ph
T
T
ON
ON
OFF
OFF
XXA
XXA
30mA
30mA
N
N
N
N
N
EBUS2
TNK
B
B
T
XXA
XXA
N
Fig. 72
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