
Air Conditioner Service Manual
3
3
18K, 24K
1
0
.4. Current flow
CN7
(
LEV
)
CN2
(OHT)
CN1
(OPTOAT)
CN3
(OVT)
CN401
(485-COM)
CN409
For
programmed
CN407
For EEPROM
programmed
C N
H
L
CN410
(OUTFAN)
P2
(ACN)
P3
(S)
P1
(ACL)
P00
P01
P5-1
、
P8
(VAL)
Electric reactor
PC monitor
P10-1(U)
P10-2(V)
COMP.
(
Re
d
)
(
Wh
ite
)
(
Bl
u
e
)
To
indo
or
uni
t
E
xpa
ns
ion v
alv
e
Suc
tio
n T
em
p
sens
or
O
ut d
oor
c
oil
Te
m
p s
ens
or
O
utd
oo
r am
bie
nt T
em
p se
ns
o
r
C
O
M
P. t
op
Te
m
p
pr
ote
ctio
n
Ex
ha
us
t T
em
p.
se
ns
or
CN12
(
ORQ
)
P13(L)
P14(L)
P10-3(W)
P9
(DCFAN)
CN11
(HEAT)
DRM
1
DR
M
-C
OM
DRM
2
DRM
3
CN13
U603
IPM
Q403 IGBT
DN401
rectifier
D412
Fast recovery
diode
Indoor unit outdoor unit
Power
supply
compressor
Indoor
unit
PCB
Outdoor
unit
PCB
Li
ve
Neutr
al
G
ro
und
live
Neutral
Communication
wire
Ground
U
V
W