-
107
-
FDCV
A302HENR
Outdoor unit contr
oller failure dia
gnosis cir
cuit dia
gram
●
Outdoor unit check points
Check items with the *mark when the po
wer is ON.
0
20
40
60
80
100
120
140
160
180
200
02
0
4
0
6
08
0
100
120
140
T
emper
ature-resistance char
acter
istics of
A/F ther
mistor (Tho-AF)
Thermistor resistance (k
Ω
)
T
emper
ature (˚C)
T21
T24
T25
T26
T27
M5
M5
T22
PWB4
PWB5
+
L
N
E
TB
1
2
3
Red
White
Orange
Gray
Gray
Brown
Red
White
Y/NG
Y/NG
LED1
Green
LED1
Green
LED2
Red
CM
Red
White
Blac
U
W
T28
T29
T30
Control PCB
(PWB1)
F5(20A)
F6(5A)
FM
01
T1
T2
T8
T9
T4
T10
T11
Noise filter
PCB(PWB3)
T5
T6
CNO2
CNO1
CNQ1
CNG1
CNI1
CNI3
CNG2
CNI2
CNI4
CNQ2
CNFAN
CNQ1
CNQ2
When the outdoor
unit fan motor is
abnormal:
(Refer to page 114)
Must be conductive.
When blown, replace with F3 fuse.
Replace also fan motor.
Must be conductive.
When blown, replace PCB.
Power supply check
Measure the power supply at L.N.
(It is normal if it is AC 220/240V)
V
CNW
CNW2
CNA1
CNIP
CNA2
A/F thermistor
Inverter PCB
(PWB2)
F3(2A)
F4(2A)
Inspect noise filter.
Must be conductive.
No short-circuit allowed between phases.
Must be conductive.
When fuse is blown,
replace it or check wiring.
No abnormality like
breakage, swell, etc. allowed.
Voltage between terminals
When stopped : 280 V ~ 373 V
During operation : 380 V ~ 390 V
*
