Mitsubishi Heavy Industries MHI FDU71VNXVF1 Technical Manual page 22

POWER SOURCE 1～220ｰ240V 50Hz／1～220V 60Hz
TB
F（20A）
RD
L1
WH
N
MCCB
YE／GN
T2 T1 T8 T9
T4 F6（5A）
ELCB
RD
T5 N／F PWB3 T10
WH
T6
T11 F3（4A）
CNO2?WH? T13
3 1
T21 T22 CN01
CNW
BK
CNG2 CNG1
YE （WH） （WH）
（BK） （BK）
T24
INV
PWB1
L1
CNI2 BL CNI1
PWB2
T25
（WH） （WH）
IPM
CNI4 BL CNI3
（WH） （WH）
T28 T29 T30 T26 T27
U V W
RD
CNA1
BL
+ （WH）
W C1
V
RD
U CNA2
MS CNN
BL
CM （WH）
3～ （YE）
DH
OPTIONAL
Power cable, indoor-outdoor connecting wires
MAX over current Power cable size
Model
2
（ A ）
（ mm ）
71 17 3.5
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.
Refer to installation manual or technical manual about usage of local setting switch.
Don't operate SW3-3,SW5-1,SW5-2,SW7,SW8
TB
OR
1
GY TO INDOOR UNIT
2
POWER WIRES
1 2
SIGNAL WIRE 3
3
SM2 SM1 FM01
M M
1 3
6 5 4 3 2 1 6 5 4 3 2 1 7 6
CNW2 CNEEV2 CNEEV1 CNFAN
（OR） （RD） （WH） （WH）
52X1 52X3
52X4 LED1 LED2
CNR CNS CNH CNTH CNIP CNPS
（WH） （RD） （PK） （WH） （YE） （WH）
8 7 6 5 4 3 2 1
t° t° t° t° t°
LPT
CH
20S
63H1 Tho-R1 Tho-D Tho-S Tho-A Tho-IPM
Power cable length indoor-outdoor Earth wire size
wire size x number
（ m ）
21 φ1.6mm x 3
φ1.6mm
M
5 4 1
ON ON
BK
CNQ1
1 2 3 4 1 2 3
（WH） 6
SW9
SW5 SW8
CNQ1
Mark
（WH）
BK
BL
ON ON
CNQ2 BK
1 2 3 4 1 2 3
BR
（BK） 6
SW3 SW7
CNQ2
OR
（BK）
CNB
（RD）
RD
WH
t°
YE
YE／GN
Tho-R2
GY
PK
Local setting switch SW3, SW5（Set up at shipment OFF）
SW3-1 Defrost control change The defrosting operation interval becomes
shorter by turning ON this switch.
This switch should be turned ON in the area
where outside temperature becomes below
the freezing point.
SW3-2 Snow guard fan control When this switch is turned ON, the outdoor
unit fan will run for 10 seconds in every 10
minutes, when outdoor temperature falls to
3 C or lower and the compressor is not
ﾟ
running when the unit is used in a very
snowy country, set this switch to ON.
SW5-3,4 Trial operation Method of trial operation
1. Trial operation can be performed by using
SW5-3.
2. Cooling trial operation will be performed
when SW5-4 is OFF, and heating trial
operation when SW5-4 is ON.
3. Be sure to turn OFF SW5-3 after the trial
operation is finished.
Item Description
CM Compressor motor
FM01 Fan motor
Crankcase heater
CH
Drain pan heater
DH
Auxilliary relay（for CH）
52X1
52X3 Auxilliary relay（for 20S）
52X4 Auxilliary relay（for DH）
20S Solenoid valve for 4 way valve
SM1 Expansion valve for cooling
Expansion valve for heating
SM2
High pressure switch
63H1
Thermistor
Tho-A
（Outdoor air temp.）
Tho-D Thermistor
（Discharge pipe temp.）
Color
Tho-R1,R2 Thermistor
（Heat exchanger temp.）
Black
Blue Thermistor
Tho-S
（Suction pipe temp.）
Brown
Orange Tho-IPM Thermistor （IPM）
Red LPT Low pressure sensor
White IPM Intelligent power module
Yellow
TB Terminal block
Yellow／Green Fuse
F,F3
Gray Connector
CnA～Z
Pink Pump down switch
SW9
SW3,5 Local setting switch
LED1 Indication lamp（GREEN）
LED2 Indication lamp（RED）
L1 Reactor