Specifications

-
50
-
Measure in this sectionOperation SW ON
8~10 sec.
0
Output voltage
(ACV)
(Example)
RUN light: 2 time flash
TIMER light: 2 time flash
◆ Inspection of resistance value of sensor
Remove the connector and check the resistance value.
See the section of sensor characteristics on page 43.
◆ Inspection of electronic expansion valve
To test if there is voltage.
◆ Check point of outdoor unit (50 type)
If the expansion valve does not operate as shown above, it is defective.
(Voltage is only applied to the electronic expansion valve when the valve opening
is being changed.)
Red to White
Red to Orange
Brown to Yellow
Brown to Blue
Normal if there is approximately DC 5 V 10 seconds
after the power asupply is turned on.
◆ Inspection of input to PCB
◆ Power transistor inspection procedure
¡ Check the voltage between terminals
1~2 on the terminal block.
(It is normal if AC 220/230/240V
is detected.)
◆ Inspection of serial signal
Check the voltage between terminals
2~3on the terminal block.(It is normal
if the needle swing in the range of DC
0~Approx.12V)
1
For 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 AC 300 volt range.)]
(1) If there is a self-diagnosis display, inspect the compressor system
(burns, wiring mistakes, etc.) If no problems are found, check the
output of the power transistor.
(2) Output inspection procedure
Disconnect the terminals for the compresseor.
If an output such as the one shown in the figure on the right can
be measured, the power transistor and the circuit board for the
outdoor unit are normal.
CAUTION
-
HIGH VOLTAGE
High voltage 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_1P_1
BK
RD
N_1
P_1
DC-NDC-P
PWB3 (CAPACITOR)
BK
RD
CNG
PWB1 (MAIN )
PWB2 (POWER )
EEV
Th4 Th5 Th6
CNT CNJCNDCNB
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
CNHCNG
CNHCNG
G3
RD
Y/GN
CNI
WH
2/N
N-1
3
CNO.1