-
69
-
'19 • PAC-SM-332
(8) Outdoor unit control failure diagnosis circuit diagram
Model FDC71VNX-W
• Outdoor unit check points
*
●
Outdoor unit check points
Check items with the *mark when the power is ON.
Power source check: Measure the power source at L.N. (It is normal if it is
AC 220-240V)
Noise filter check: There should be continuity
.
There should be no shorts between phase
Must be conductive. When fuse is blown, replace it or check wiring.
LED2(Red) check: 1-5 time flash :
Refer to page 51
No anomaly like breakage, swell, etc. allowed.
Vo
ltage between terminals
When stopped : 280V
- 373V
During operation : 380V
- 390V
Fuse check: There should be continuity
.
If faulty
, replace the control PCB
When the outdoor fan motor is anomalous: (Refer to page
11
1)
1
‑
7 time flash
(Refer to page 51)
Must be conductive. When blown, replace with F3 fuse. Replace also fan motor
.
LED1(Y
ellow) check:
DC Reactor continuity Check: Max 25m
Ω
C1
PC
B2
IN
VE
RT
ER
P
WB
CN
I4
CN
I2
6
Ri
Si
Ro
1
So
1
～
TB
1
U
V
W
U
W
V
+
G1
+
‑
L
N
E
L1
MS ３～
DS
1
CN
E
CT
1
RA
M
CH
EC
KE
R
2
CN
E
CN
W2
CN
W
CN
V
6
CN
I1
PC
B1
CO
NT
RO
L
PW
B
CN
S
CN
EEV1
CN
EEV2
CN
FA
N
CN
IP
CN
B
CN
TH
EEV
CE
EV
H
CN
PS
PS
L
M
RA
M
CH
EC
KE
R
CH
CN
R
20
S
CN
N2
CN
A2
M
Th
AT
hS
Th
DT
hR
1T
hR
2
CN
N1
CN
A1
FM
1
M
Ro
3,
So
3
SW
4
IN
TE
R
LE
AV
E
FE
RRI
TE
COR
E
1
TU
RN
FE
RR
IT
E
CO
RE
5
TU
RN
S
CN
I3
3
CN
Z
CM
F3
4A
F1,2
F1
2
0A
F1,1
t°
Ro
2
So
2
Ro
3
So
3
PC
B3
NO
IS
E
FI
LL
TE
R
PW
B
NO
IS
E
FI
LL
TE
R
～
CN
G2
CN
G1
N
P
V
U
W
2
CN
O1
PW
B3
CN
O2
PW
B2
CN
O1
CN
O2
52
X
PW
B5
SW
P
WB
T2
1
T2
2
T5
1
T5
2
T2
6
T2
7
t°
t°
t°
t°
t°
PW
B4
SW
P
WB
1
2
3
BA
FB
L
L
IG
BT
MO
DU
LE
60
0V
/2
0A
L2
T6
2
CN
1
PC
B7
RE
AC
TO
R
PW
B
CP
AA
YA
Z
T2
8
T2
9
T3
0
R
AC
AD
DK
TB
2
A
(P
OW
ER
S
OURC
E)
POWER
SOURCE
CIRCUIT
２４V:FOR
INVERTER
PW
B
２０V：FO
R
SIGNAL
LIN
E
１３V：FOR
ACTUATOR
DRIVE
１５V：FOR
FAN
MOTOR
５V(←１３V)：FOR
CONTROL
MICROCOMPUTER
AV
AW
CN
DR
M
OP
TI
ON
OP
TI
ON
LED1
Yellow
LED1
Green
LED2
Red
F3 250V 2A
F4 250V 2A
