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Electrical installation
Installer reference guide
53
3(A)MXM+3(A)MXF+4MXM+5MXM
R32 Split series
4P600463-1C – 2020.08
DANGER: RISK OF ELECTROCUTION
Disconnect the power supply for more than 10 minutes, and measure the voltage at
the terminals of main circuit capacitors or electrical components before servicing.
The voltage MUST be less than 50 V DC before you can touch electrical components.
For the location of the terminals, see the wiring diagram.
AC
DC
DC
S20
S
21
S
22
S
23
S92
S93
S40
S80
S7
0
U
W
V
D
C
-
FU2
S9
0
S2
4
AL2 AL1
e
f
g
h
a
b
c
d
DC(-)
FU2
a
AL1, AL2 - solenoid valve lead wire connector*
b
S20~24 - electronic expansion valve coil lead wire connector (room A, B, C, D, E)*
c
S40 – thermal overload relay lead wire and high pressure switch connector*
d
Multimeter (DC voltage range)
e
S90~93 – thermistor lead wire connector
f
S70 - fan motor lead wire connector
g
S80 - 4-way valve lead wire connector
h
Compressor lead wire connector
*May differ depending on the model.
9.1.2 Guidelines when connecting the electrical wiring
Keep the following in mind:
▪
If stranded conductor wires are used, install a round crimp-style terminal on the
end of the wire. Place the round crimp-style terminal on the wire up to the
covered part and fasten the terminal with the appropriate tool.
b
a
a
Stranded conductor wire
b
Round crimp-style terminal
▪
Use the following methods for installing wires:
Wire type
Installation method
Single-core wire
c b
c
a
a
A
AA´
A´
a
Curled single-core wire
b
Screw
c
Flat washer
