-
50
-
Measure in this section
Operation SW ON
8~10 sec.
0
Output v
oltage
(A
CV)
(Example)
R
UN light:
2 time flash
TIMER light:
2 time flash
◆
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 (50 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.
◆
Inspection of input to PCB
◆
P
o
wer transistor inspection pr
ocedure
¡
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)
1
F
or about 50 seconds.
After being switched on,
the will be a delay of approximately one minute
depending on the conditions.
[Use a tester with a needle indicator for the inspection. (Do not use a
digital tester
. Check in the
A
C
300 v
olt range.)]
(1)
If there is a self-diagnosis display
, inspect the compressor system
(b
urns, wiring mistak
es, etc.) If no problems are found, check the
output of the po
wer transistor
.
(2)
Output inspection procedure
Disconnect the terminals for the compresseor
.
If an output such as the one sho
wn in the f
igure on the right can
be measured, the po
wer transistor and the circuit board for the
outdoor unit are normal.
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.
Black
Brown
Red
Blue
White
Yellow/Green
BK
BR
RD
BL
Orange
OR
Green
GR
WH
Y/GN
Color symbol
N_1
P_1
BK
RD
N_1
P_1
DC-N
DC-P
PWB3 (CAPACITOR)
BK
RD
CNG
PWB1 (MAIN )
PWB2 (POWER )
EEV
Th4
Th5
Th6
CNT
CNJ
CND
CNB
FMo
20S
F(250V 15A)
BK
1
L-1
AC.N
AC.L
AC.N
AC.L
BL
GR
BL
GR
L
AF_L2
AF_L1
OR
OR
V
CM
W
BK
RD
WH
OR
OR
BK
RD
WH
U
CNH
CNG
CNH
CNG
G3
RD
Y/GN
CNI
WH
2/N
N-1
3
CNO.1
