Mitsubishi Heavy Industries MHI FDU71VNXVF1 Technical Manual page 24

POWER SOURCE 3N～380ｰ415V 50Hz
TB
RD
L1 L1o
L1i
WH
L2o
L2 L2i F（8A）
BL
L3 L3i L3o
BK
N Ni No
NOISE FILTER
CN1
PWB3
YE／GN
CN2-1
T12 GN
F（4A）
THo-P THo-R2 THo-A
t° t° t° t°
CNW CNIP CNB
TB
TO INDOOR UNIT
RD
（BK） （Y） （RD）
1
BK
[ ] 2
CNW2
POWER WIRES
1 2 BL
3
（OR）
SIGNAL WIRE
3
DH
WH
CNF
Optional 52X1 52X3
WH
（BK）
52X6 52X2 LED1
BK
CNH
BK
（BR）
CNR CNS CNEEV1
（WH） （RD） （WH）
1 2 3 4
63H1
20S
CH
M
SM1
Power cable, indoor-outdoor connecting wires
MAX over current Power cable size Power cable length
Model
2
（A）
（mm ）
100 16
125 18 3.5
140 19
The specifications shown in the above table are for units without heaters. For units with heaters, refer
to the installation instructions or the construction instructions of the indoor unit.
Switchgear of Circuit breaker capacity which is calculated from MAX. over current should be chosen
along the regulations in each country.
The cable specifications are based on the assumption that a metal or plastic conduit is used with no
more than three cables contained in a conduit and a voltage drop is 2%. For an installation falling
outside of these conditions, please follow the internal cabling regulations. Adapt it to the regulation
in effect in each country.
RD
WH
BL
BK
CT
RD
Va
R1
U
R2
THo-S THo-D THo-R1
t° t°
52C LPT
CNTH CNM CNPS
18V
（WH） （GR） （WH）
CNI 3
15V
CONTROL
PWB1
BL
CNI1
（WH）
RD
CNA1
1 2 3 4 1 2 3 4
BL
（WH）
LED2 SW1
SW3 SW5
RD
CNA2
CNEEV2 CNFAN1 CNFAN2 BL
（WH）
（RD） （WH） （WH）
6 1 2 3 4 6
1 4 5 6 7 1 4 5 6 7
M
M M
SM2 FMo1 FMo2
Local setting switch SW3（Set up at shipment OFF）
indoor-outdoor Earth wire size
SW3-1
wire size x number
（m） （mm）
26
23
φ1.6mm x 3
φ1.6
SW3-2
21
SW3-3,4
1 3
52C
R5
2 4
INVERTER
C3
PWB2
AC1 AC2 AC3
GN
G
CNR
R5 DM
BK
（WH）
K
+4 -6
RD
CNW2
BL
（WH）
C4
L
RD RD RD
TB5
P
+
R3
C1 IPM
WH
+
R4 C2
BL BL
TB6
N
RD
CNW1
BK
（WH）
CNI2
（WH）
RD
CNO1
BL
（RD）
The defrosting operation interval becomes shorter
by turning ON this switch. This switch should be
Defrost control change
turned ON in the area where outside temperature
becomes below the freezing point.
When this switch is turned ON, the outdoor unit
fan will run for 30 seconds in every 10 minutes,
when outdoor temperature falls to 3℃ or lower and
Snow guard fan control
the compressor is not runnning when the unit is used
in a very snowy country, set this switch to ON.
Method of trial operation
1 Trial operation can be performed by using SW3-3,4.
2 Compressor will be in the operation when SW3-3 is ON.
Trial operation
3
Cooling trial operation will be performed when SW3-4 is OFF,
and heating trial operation when SW3-4 is ON.
4 Be sure to turn OFF SW3-3 after the trial operation is finished.
Item Description
CH Crankcase heater
CM Compressor motor
CnA～Z Connector
CT Current sensor
DH Drain pan heater
DM Diode module
F Fuse
FMo1,2 Fan motor
IPM Intelligent power module
L Reactor
U RD
U
LED1 Indication lamp（GREEN）
V V MS
WH
3～
W
W BL LED2 Indication lamp（RED）
CM LPT Low pressure sensor
SM1 Expansion valve for cooling
SM2 Expansion valve for heating
SW1 Pump down switch
SW3,5 Local setting switch
TB Terminal block
THo-A Thermistor（Outdoor air temp.）
THo-D Thermistor（Discharger pipe temp.）
THo-R1,2 Thermistor（Heat exchanger pipe temp. ）
THo-S Thermistor（Suction pipe temp.）
THo-P Thermistor（IPM）
20S Solenoid valve for 4 way valve
52C Relay
52X1 Auxilliary relay（for CH）
52X2 Auxilliary relay（for DH）
52X3 Auxilliary relay（for 20S）
52X6 Auxilliary relay（for 52C）
63H1 High pressure switch
Mark Color
BK Black
BL Blue
BR Brown
OR Orange
RD Red
WH White
YE Yellow
YE／GN Yellow／Green
GR Gray
P Pink