Mitsubishi Heavy Industries MHI FDU71VNXVF1 Technical Manual page 134

Models FDC100VNX,125VNX,140VNX
Outdoor unit check points
●
Check items with the *mark when the power is ON.
*
Power supply check:
Measure the power supply L1,N
(It is normal if it is AC220-240V)
TB
Yellow/Green
E1
Red
L1
L1i
F 250V 30A
F 250V 8A
White
N
Ni
Red
1
1
PWB3
White
2 NOISE FILTER
2
White
Blue
3
Must be conductive.
When fuse is blown,
replace it or check wiring.
F 250V 4A
CNW2
RAM
CNE
63H1
CNH
Noise filter check:
There should be continuity.
There should be no shorts between phases.
t°
L1o ～ ＋
TB1
52X1
DM
TB2
No
～ －
CT1
E
LPT
CNW CNIP CNB CNTH CNPS
PWB1
CONTROL PWB
F1 (250V, 2A)
F2 (250V, 4A)
LED2 LED1
(Red) (Green)
CNR CNS CNF
CNEEV1
CH1 20S DH
M
OPTION
SM1
LED2(Red) check:
1~5 time flash : Refer to page 115
Capacitor check:
DC Reactor continuity Check:
Check for anomaly in appearance
Max 25mΩ
such as damage, swelling, etc.
L1
L1 L2
＋
C1
TB10 P
A/F MODULE
TB11
N2
－
CNACT1
CNA2
CNI1
CNI3
18V
15V
CNA1
FMO1
M
CNFAN1
FMO2
M
CNFAN2
CNEEV2
When the outdoor
unit fan motor is
M
abnormal:
(Refer to page 172)
SM2
Check the power transistor
module if there is short, open, or
breakdown on the elements
PWB2
INVERTER PWB
P
TB7
Red
V
TB8
White
DIP-IPM
LED1
N2
(Yellow)
TB9 Blue
CNI2 CNI4 CNE
RAM
LED1 (Yellow) Check :
1～6 fimes flash
(Refer to page 115)
U
CM
W