-
49
-
+
~
~
–
+
+
+
1
3
2/N
RD
WH
BK
250V 15A
F
R.IN
C-2
S.IN
N
P
POWER
TRANSISTOR
UV
W
RD
WH
BK
CM
CND
Th
4
Th
5
Th
6
CNA
FMO
CNB
20S
EEV
DS
L
G
CNE
◆
Inspection of resistance v
alue of sensor
Remo
v
e the connector and check the resistance v
alue.
See the section of sensor characteristics on page 43.
◆
Inspection of electr
onic e
xpansion v
alve
T
o
test if there is v
olta
g
e
.
◆
Chec
k point of outdoor unit (20,
25,
35 type)
If the e
xpansion v
alve does not operate as sho
wn abo
ve
, it is def
ective
.
(V
oltage is only applied to the electronic e
xpansion v
alv
e when the v
alv
e opening
is being changed.)
Red to
White
Red to Orange
Bro
wn to
Y
ello
w
Bro
wn to Blue
Normal if there is approximately DC 5
V 10 seconds
after the po
wer asupply is turned on.
Color symbol
BK
RD
WH
Y/GN
Black
Red
White
Y
ello
w/Green
◆
Inspection of input to PCB
¡
Check the v
oltage between terminals
1
~
2
on the terminal block.
(It
is
normal if
A
C
220/230/240V
is detected.)
◆
Inspection of serial signal
Check the v
oltage between terminals
2
~
3
on the terminal block.(It is normal
if the needle swing in the range of DC
0~Approx.12V)
CA
UTION
-
HIGH
V
O
L
T
A
GE
High v
oltage is produced in the control box. Don’
t touch
electrical parts in the control box for 5 minutes after the
unit is stopped.
