18
Installation
2.4.6 Electrical connections
Cables with the following characteristics are required for
power supply and communication between the indoor
and outdoor units:
Indoor
unit
Power supplied
from outdoor unit
Signal from outdoor
unit
n° cables/cross
section
n° cables/cross
section
20M
2 x 1.5mm
2
+ G
2 x 1.5mm
2
27M
2 x 1.5mm
2
+ G
2 x 1.5mm
2
35M
2 x 1.5mm
2
+ G
2 x 1.5mm
2
53M
2 x 1.5mm
2
+ G
2 x 1.5mm
2
70M
2 x 2.5mm
2
+ G
2 x 2.5mm
2
The indicated cross-sections are suitable for a wiring
length of up to 5 metres.
f
ATTENTION ELECTRIC DANGER
Before making electrical connections, turn off
the main switch of the system.
l
WARNING
WRITE DOWN THE SPECIFICATIONS OF
THE FUSES.
The air conditioner board (PCB) is equipped
with a fuse for overcurrent protection. Fuse
specifications are printed on the circuit board,
for example:
Indoor unit:
T5A/250VAC
NOTE
: The fuse is ceramic.
1
Prepare the cable for connection:
– Using a wire stripper, strip the rubber sheath at
both ends of the cable and expose approximately
40 mm of the internal conductors.
– Strip the insulation sheath at the ends of the
conductors.
– Using a crimping tool, crimp U-type wire terminals
to the ends of the conductors.
m
CAUTION
When crimping, clearly identify live cables (“L”)
and other cables.
2
Open the front panel of the indoor unit.
3
Using a screwdriver, open the terminal compartment
cover on the right side of the unit. This will give you
access to the terminal block.
Terminal block
Cover
Screw
Cable clamp
The wiring diagram is shown
inside the terminal compartment
cover of the indoor unit.
Fig. 13
l
WARNING
All connections must be made exactly as
shown in the wiring diagram on the inside of
the terminal block cover of the indoor unit.
4
Unscrew the cable clamp under the terminal block
and hold it aside.
5
Looking at the back of the unit, remove the plastic
panel located on the left side of the base.
6
Route the electrical cables through this opening,
proceeding from the back of the unit to the front.
7
Looking at the front side of the unit, match the colours
of the cables to the labels on the terminal block,
connect the U-shaped terminals and screw each
cable securely to the corresponding terminal.
a
CAUTION DANGER
DO NOT SWITCH LIVE AND NEUTRAL CABLES.
Such a configuration is dangerous and may
cause the air conditioner to malfunction.
8
Check that all connections are stable, then close the
cable clamp to secure the signal cable to the unit.
Screw the cable clamp on firmly.
9
Replace the cover on the front side of the unit and
replace the plastic panel on the back.
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