Mitsubishi Heavy Industries MHI FDU71VNXVF1 Technical Manual page 198

POWER SOURCE 3N〜380ｰ415V 50Hz
TB
RD
L1 L1i L1o
WH
L2 L2i F（8A） L2o
BL
L3 L3i L3o
BK
N
Ni No
NOISE FILTER
CN1
PWB3
GN
CN2-1
T12 GN
THo-IPM THo-R2 THo-A THo-S
t° t° t° t°
TB
CNW CNIP CNB
TO INDOOR UNIT
（BK） （Y） （RD）
RD
1
BK
2
CNW2
POWER WIRES
1 2 BL
（OR） CONTROL
3
SIGNAL WIRE
3 PWB1
52X1 52X3
52X6 LED1 LED2
BK
CNH
BK
（BR）
CNR CNS CNEEV1
（WH） （RD） （WH）
63H1 1 2 3 4 5 6
20S
CH
M
SM1
5 or 6 wires
Power cable, indoor-outdoor connecting wires
MAX over current Power cable size
Model
（A）
100 16
125 18
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
1 3
BK
CT
52C
2 4
AC1 AC2 AC3
G
RD
R5 DM
K
+4 -6
R1
U L
RD RD
R2
R3
R4
THo-D THo-R1 BL
t° t° 52C LPT
CNTH CNM CNPS
（WH） （GR） （WH）
18V
CNI 3
15V
CNI1 BL
（WH）
RD
CNA1
1 2 3 4 1 2 3 4
（WH） BL
SW1
SW3 SW5
RD
CNA2
（WH） BL
CNEEV2 CNFAN1
（RD） （WH）
1 2 3 4 5 6 1 4 5 6 7
M M
SM2 FMo1
5 or 6 wires
Power cable length indoor-outdoor Earth wire size
2 wire size x number （mm）
（mm ） （m）
26
φ 1.6mm x 3
3.5
23
21
INVERTER
PWB2
GN
CNR
BK （WH）
RD U
U
MS
V
WH
IPM
3〜
RD
V W
TB5
BL
P
+
W
C1
CM
WH
+
C2
BL
TB6
N
RD
CNW2
BL （WH）
RD
CNW1
BK
（WH）
CNI2
（WH）
RD
CNO1
BL （RD）
Local setting switch SW3（Set up at shipment OFF）
SW3-1 Defrost control change
φ 1.6
SW3-2
Snow guard fan control
SW3-3,4
Trial operation
Item Description
CnA〜Z Connector
CH Crankcase heater
CM Compressor motor
CT Current sensor
DM Diode module
F Fuse
FM01 Fan motor
IPM Intelligent power module
L Reactor
LED1 Indication lamp（GREEN）
LED2 Indication lamp（RED）
LPT Low pressure sensor
SM1 Expansion valve for cooling
SM2 Expansion valve for heating
Mark Color
SW1 Pump down switch
BK Black
SW3,5 Local setting switch
BL Blue
TB Terminal block
BR Brown
THo-A Thermistor（Outdoor air temp.）
GR Gray
THo-D Thermistor（Discharger pipe temp.）
P Pink
THo-IPM Thermistor（IPM）
OR Orange
Thermistor（Heat exchanger pipe temp. ）
THo-R1,2
RD Red
THo-S Thermistor（Suction pipe temp.）
WH White
20S Solenoid valve for 4 way valve
YE Yellow
52X1 Auxilliary relay（for CH）
YE／GN Yellow／Green
52X3 Auxilliary relay（for 20S）
52X6 Auxilliary relay（for 52C）
63H1 High pressure switch
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.
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 C or lower and
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.
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.