Mitsubishi Electric FDF71VNXVD Technical Manual page 147

FDC100,125,140VS
Outdoor unit check points
●
Check items with the *mark when the power is ON.
*
Power supply check: Noise filter check:
Measure the power supply L1,L2,L3 There should be continuity.
(It is normal if it is AC380-415V) There should be no shorts between phases.
TB
Red
L1i
L1
White PWB3
L2 L2i
NOISE FILTER PWB
Blue
L3
L3i
Black
Ni
N
CN1 CN2-1
T12
(E)
1
2
2
3
(E1)
2
CNW2
RAM
Resistance check:
Resistance is measured
(15Ω)
1 2
L1o
52C
L2o
3 4
L3o
CT1
No
F1
5 6
3
CNW CNIP CNIP CNTH CNM
PWB1
CONTROL PWB
F1 (250V, 2A)
CNE
LED1 LED2
(Green) (Red)
F2 (250V, 4A)
CNH
CNR CNS
CNEEV1
SM1 SM1 SM1
LED2(Red) check:
1~5 time flash (Refer to page 121)
Capacitor check:
DC Reactor contiuity Check for anomaly in appearance
check:55mΩ or less
such as damage,swwll,etc.
R1 R2
L1
C1
R3
R5
AC1
＋4
DM
AC2
R4
C2
－6
AC3
LPT
CNPS CNA2
CNI1
CNI3
18V
15V
2
CNA1
FMO1
CNFAN1
CNEEV2
LED1 (Yellow) Check
1 ~ 6 times flash
( Refer to page 121 )
SM2
When the outdoor
unit fan motor is
anomalous.
(Refer to page 186)
PWB2
INVERTER PWB
TB5
TB7
Red
U
TB8
DIP-IPM
White
V
TB6
W
TB9
Black
CNW2
CNR
RAM
CNE
CNI2
LED1
(Yellow)
CNW1 Fuse check:Three should
be continuity.
If it is faulty, replace the
F1 (250V, 6.3A)
CNO1
inverter board.
F2 (250V, 2.5A)
CM