OPERATING AND INSTALLATION INSTRUCTIONS LG 250 A
PAGE 45
U
S
ER
G
ENER
A
L
S
P
EC
IA
LIS
T
P
ER
S
O
NNEL
Changes reserved
In general, external system com-
ponents, extension components
and temperature sensors re-
quired must be connected in accordance
with the electrical connection diagram.
Temperature sensors T1 to T4 are facto-
ry-wired. The control system automatical-
ly recognises when outdoor temperature
sensor T5's electrics are connected.
ELECTRICAL WIRING DIAGRAM
1
2
3
N
L
1
2
3
1
2
3
1
2
3
1
2
3
1
2
3
PE
1
2
3
1
1
M
1
1
1
1
Mssu
:
A
1soo
o
o
s
:u
AA
:ss
AA
:
osd
o
s AA
:
u
AA
1:o
o
A
AA
:
:
o
o
s
1
AA
1
:AA
1
1
:+
1
D
o
o
o
(
d
)
1
:
d
s
(
)
1
:u(
o
)
1:D(
b
u
)
1:
o
:oso
oo
DAD:
oDds
o(A)
Dodoos
:AAA
1
:+
1
D
o
o
o
(
d
)
:
ds
(
)
:u(
o
)
:D(
b
u
)
1:
11: 1:
1D
Ao
1:
D
(dd)
:
1: :
1D
Ao
:
D
FUSE2
Fuse
T4AH
FUSE1
Fuse
T10AH
o
s
Bu
tt
on
ba
tte
ry
3V,
T
yp:
C
R2
03
2
1
2 T1
1
3
4 T2
56 T3
78 T4
9
10 T5
MA
1:sA :us : :u :udooo
o
M1:
MDus
1:
M
od
bu
sA(D+)
:M
od
bu
s(D)
:D
1:A
1
2
3
1
2
3
4
1
2
1
2
3
4
1
2
3
4
1
2
3
1
2
3
1
2
3
1
2
3
4
1 2 3 4
E1
E2
GND
SD‐CARD
o
sou
o
:
d
b
o
bbobusbodo1
1:
u
1:
M
od
bu
sA
(D
+)
:Modbus(D) :ModbusD :Modbus1
