6 Installation
Installer reference guide
18
ARXM25~35 RXM20~35 RXJ20~3
RXA20~35A3V1B
R32 split series
4P518023-5D – 2019.04
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.
DC-
DC+
h
e
d
c
b
f
a
g
a
Multimeter (DC voltage range)
b
S80 – reversing solenoid valve lead wire
c
S70 – fan motor lead wire
d
LED
e
S90 – thermistor lead wire
f
S20 – electronic expansion valve lead wire
g
S40 – thermal overload relay lead wire
h
DB1 - diode bridge
6.7.3
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
Stranded conductor
wire with round
crimp-style terminal
c b
b
a
c
a
B
B
a
Terminal
b
Screw
c
Flat washer
O
Allowed
X
NOT allowed
Tightening torques
Item
Tightening torque (N•m)
M4 (X1M)
1.5~1.6
M4 (earth)
1.4~1.5
▪ If single-core wires are used, be sure to curl the end of the lead.
Improper work may cause heat or fire.
▪ The earth wire between the wire retainer and the terminal must be
longer than the other wires.
1-3
6.7.4
Specifications of standard wiring
components
Component
Class 20
Class
25+35
Power supply cable Voltage
220~240 V
Phase
1~
Frequency
50 Hz
Wire sizes
3-core cable
2.5 mm2~4.0 mm
2
H05RN-F (60245 IEC 57)
Interconnection cable
(indoor↔outdoor)
4-core cable
1.5 mm
2
~2.5 mm
2
and
applicable for 220~240 V
H05RN-F (60245 IEC 57)
Recommended circuit breaker
10 A
13 A
Earth leakage circuit breaker
MUST comply with
applicable legislation
6.7.5
To connect the electrical wiring on the
outdoor unit
1
Remove the service cover. See
.
2
Strip insulation (20 mm) from the wires.
a
b
a
Strip wire end to this point
b
Excessive strip length may cause electrical shock or
leakage.
3
Open the wire clamp.
4
Connect the interconnection cable and power supply as follows:
50 Hz
220-240 V
c
d
f
a
b
e
a
Interconnection cable
b
Power supply cable
c
Circuit breaker
d
Earth leakage circuit breaker
e
Power supply
f
Earth
