Mitsubishi Electric FDT125VNVF Technical Manual page 127

POWER SOURCE 3∼380ｰ415V 50Hz／380V 60Hz
TB
F（10A）
RD
L1
RD
WH
L2
BL
L3
BK
N
BK
GN
L1i L2i L3i Ni
NOISE FILTER
GN
PWB3
E
L1o L2o L3o No
BK
CT
CNW
（BK）
52X
u
RD
R5 AC1 AC2 AC3
CNW1
CNO1
CNA1
（WH） BL
+4 （RD）
DM （WH）
BL DC FAN RD
-6
CNO2
CNA2
PWB4
BL
（RD）
（WH）
L
CNI3 CNI1
INVERTER
P2 （WH） （WH）
PWB2
P3
I P M
N2
P N U V W
+
V W
U
MS
+
3∼
CM
Power cable, indoor-outdoor connecting wires
MAX over current
Model Power cable size Power cable length
2
（A）
（mm）
200 19 3.5
250 22 5.5
※At the connection with the duct type indoor unit.
MAX over current Power cable size Power cable length
Model
2
（A）
（mm）
200 24
5.5
250 27
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.
TB
RD
TO INDOOR UNIT
1
BK
2
[ ]
POWER WIRES
1 2
3
3
SIGNAL WIRE
SM1 SM2
M M
6 5 4 3 2 1 6 5 4 3 2 1
CNW2 CNEEV1 CNEEV2
（OR）
（WH） （RD）
CONTROL
PWB1
ON
52X1 52X3 52X6
OFF
1 2 3
LED1 LED2
SW3
CNR CNS CNM CNH CNU CNB
（WH） （RD） （GR） （BR） （BL） （RD）
t° t° t° t°
CH 20S 52X
63H1 THo-H THo-R2 THo-R1 THo-D
indoor-outdoor Earth wire size
wire size x number
（m） （mm）
21
φ1.6mm x 3
φ1.6
31
indoor-outdoor Earth wire size
wire size x number
（m） （mm）
29
φ1.6mm x 3
φ1.6
26
FMO1 FMO2
M M
7 6 5 4 1 7 6 5 4 1
CNFAN1 CNFAN2
（WH） （WH）
ON
Mark Color
OFF
4 1 2 3 4
BK Black
SW1
SW5
BL Blue
BR Brown
CNTH CNPS
CNIP
（WH） （Y） （WH）
GR Gray
P Pink
t° t° t°
OR Orange
LPT RD Red
THo-S THo-A THo-IPM
WH White
Y Yellow
Y／GN Yellow／Green
Local setting switch SW3（Set up at shipment OFF）
The defrosting operation interval becomes shorter
by turning ON this switch. This switch should be
Defrost control change
SW3-1
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
SW3-2 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.
SW3-3,4
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
CnA∼Z Connector
CH Crankcase heater
CM Compressor motor
CT Current sensor
DM Diode module
F Fuse
FM01,02 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
SW1 Pump down switch
SW3,5 Local setting switch
TB Terminal block
Thermistor（Outdoor air temp.）
THo-A
Thermistor（Discharge pipe temp.）
THo-D
Thermistor （Camp.undeneth temp.）
THo-H
THo-IPM Thermistor（IPM）
THo-R1,2 Thermistor（Heat exchanger pipe temp. ）
THo-S Thermistor（Suction pipe temp.）
20S Solenoid valve for 4 way valve
52X1 Auxilliary relay（for CH）
52X3 Auxilliary relay（for 20S）
52X6 Auxilliary relay（for 52X）
63H1 High pressure switch