6 Installation
Installer reference guide
18
RXF50+60B2_RXF71A2_RXP50~71L2_(A)RXM42~71N2_RXJ50N2_
RXA42+50B2
R32 split series
4P513661-6B – 2018.05
6.7.2
Precautions when connecting the
electrical wiring
INFORMATION
Also read the precautions and requirements in the
following chapters:
▪ General safety precautions
▪ Preparation
DANGER: RISK OF ELECTROCUTION
WARNING
ALWAYS use multicore cable for power supply cables.
WARNING
Use an all-pole disconnection type breaker with at least
3 mm between the contact point gaps that provide full
disconnection under overvoltage category III.
WARNING
If the supply cord is damaged, it MUST be replaced by the
manufacturer, its service agent or similarly qualified
persons in order to avoid a hazard.
WARNING
Do NOT connect the power supply to the indoor unit. This
could result in electrical shock or fire.
WARNING
▪ Do NOT use locally purchased electrical parts inside
the product.
▪ Do NOT branch the power supply for the drain pump,
etc. from the terminal block. This could result in
electrical shock or fire.
WARNING
Keep the interconnection wiring away from copper pipes
without thermal insulation as such pipes will be very hot.
DANGER: RISK OF ELECTROCUTION
All electrical parts (including thermistors) are powered by
the power supply. Do not touch them with bare hands.
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.
b
c
DC P1+
DC N1-
a
d
e
g
f
a
Multimeter (DC voltage range)
b
S80 – reversing solenoid valve lead wire
c
S20 – electronic expansion valve lead wire
d
S40 – thermal overload relay lead wire
e
S90 – thermistor lead wire
f
LED
g
S70 – fan motor lead wire
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)
1.2~1.3
M4 (earth)
▪ 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 pull relief and the terminal must be
longer than the other wires.
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