-
46
-
◆
Inspection of r
esistance value of sensor
Remo
v
e the connector and check the resistance v
alue.
See the section of sensor characteristics on page 41.
◆
Inspection power transistor
Remo
v
e the f
asten ter
minal and test output v
oltage
◆
Inspection of electr
onic expansion valve
T
o
test if ther
e is voltage.
◆
Check point of outdoor unit
If the expansion valve does not operate as shown above, it is defective.
(V
oltage is onl
y applied to the electronic e
xpansion v
alv
e w
hen the v
alv
e opening
is being changed.)
Red to
White
Red to Orange
Bro
wn to
Y
ello
w
Bro
wn to Blue
Nor
mal if there is appro
ximatel
y DC 5
V 10 seconds
after the po
w
er asuppl
y is tur
ned on.
◆
Power sour
ce and serial signal inspection
to
:
A
C
220/230/240V
1
to
2
: A
C
220/230/240V
2
to
3
: Nor
mal if the v
oltage oscillates betw
een DC 0 and appro
x. 20V
CAUTION
-
HIGH VOL
T
AGE
High v
oltage is produced in the control bo
x. Don’
t touch
electrical par
ts in the control bo
x for 5 minutes after the
unit is stopped.
BK
BR
YE
WH
OR
YG
RD
Color symbol
Black
Bro
wn
Y
ello
w
White
Orange
Y
ello
w/Gree
n
Red
L
N
N
L
YG
T
1 Phase
220-240V 50Hz
Pow
ewr Source
Indoor
unit
S-1
CNMAIN
250V
10A
F
S
IN
R
IN
R
OU
T
BK
WH
G1
YG
BR
S
O
R
O
250V 20A
F
YG
CN20S
RD
WH
PWB ASSY
(SUB)
20S
2
1
N
3
T
Outdoor unit
BK
WH
DS
WH
BK
RD
S
R
S-2
CNSUB
C-2
M
CNTH
CNEEV
t˚
t˚
t˚
222
Th
4
Th
5
Th
6
EEV
T2
T1
250V 2A
F
F 250V 1A
250V 20A
F
R
OR
YE
CNF
AN
PWB
ASSY (MAIN)
CIRCUIT
SWITCHING PO
WER
A
CTIVE
FIL
T
E
R
UNIT
++
+
BK
WH
RD
V
W
U
TRANSIS
T
O
R
PO
WER
250V 20A
F
W
V
U
P
NU
NV
NW
M
M
3~
FMo
CM
(10)
Outdoor unit inspection points
