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Model FDC71VNX
Outdoor unit check points
●
Check items with the *mark when the power is ON.
Noise filter check:
There should be continuity.
There should be no shorts between phase
*
Power supply check:
Measure the power supply at L.N.
(It is normal if it is AC 220-240V)
TB1
Ri
T1
Yellow/Green
Si
T2
White
N
F
250V 20A
Red
L
Ro2
T8
Orange
1
Gray
2
Brown
3
Must be conductive.
When fuse is blown,
replace it or check wiring.
LED2(Red) check:
1~5 time flash : Refer to page 121
DC Reactor continuity Check:
Max 25mΩ
NOISE FILER PWB
t°
Ro1
T5
NOISE
52X
FILER PWB
So1
T6
CNO2
PWB3
52
X
F6
So2
T9
Ro3
So3
G1
T10
T11
T4
CNA2
CNA1
CNIP
CNB
F3
LED1
LED2
Green
Red
63H1
CNR
CNS
CNJ
20S
CH
Must be conductive.
When blown, replace with F3 fuse.
Replace also fan motor.
No anomaly like breakage,
swell, etc. allowed.
L1
C1
T24
T25
T26
T27
T21
～
＋
A/F MODULE
T22
～
－
CNO
PWB2
INVERTER PWB
LED1
Yellow
CNG2
CNI4
LPT
CNTH
CNPS
CNG1
CNV
CNI3
PWB1
CONTROL PWB
F3 250V 2A
F4 250V 2A
CNN
CNE
CNEEV1
CNEEV2
DH
OPTION
M
M
EEVC
EEVH
Fuse check:
There should be continuity.
If faulty, replace the control PCB
Voltage between terminals
When stopped : 280V ~ 373V
During operation : 380V ~ 390V
T28
U
Red
DIP-IPM
CM
T29
V
White
20A
T30
W
Black
LED1(Yellow) check:
1～6 fimes flash
(Refer to page 121)
CNI2
CNI1
SW PWB A
PWB4
SW PWB B
PWB4
CNFAN
M
FMo
When the outdoor unit fan
motor is anomalous:
(Refer to page 186)
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Troubleshooting
