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INSTALLATION MANUAL
4. INDOOR UNIT INSTALLATION
4.6 CONNECT SIGNAL CABLE
The signal cable enables communication between the indoor and outdoor units. You must first choose the
right cable size before preparing it for connection.
Cable types:
• Indoor Power Cable (if applicable): H05VV-F or H05V2V2-F
• Outdoor Power Cable: H07RN-F
• Signal Cable: H07RN-F
Minimum Cross-Sectional Area of Power and Signal Cables
North America
Appliance Amps (A)
10
13
18
25
30
CHOOSE THE RIGHT CABLE SIZE
The size of the power supply cable, signal cable, fuse, and switch needed is determined by the
maximum current of the unit. The maximum current is indicated on the nameplate located on the side
panel of the unit. Refer to this nameplate to choose the right cable, fuse, or switch.
TAKE NOTE OF FUSE SPECIFICATIONS
The air conditioner's circuit board (PCB) is designed with a fuse to provide overcurrent protection. The
specifications of the fuse are printed on the circuit board, such as:
Indoor unit: T5A/250VAC
Outdoor unit (applicalbe to units adpot R32 or R290 refrigerant only):
T20A/250VAC(<=18000Btu/h units)
T30A/250VAC(>18000Btu/h units)
NOTE: The fuse is made of ceramic.
1. Prepare the cable for connection:
a. Using wire strippers, strip the rubber jacket from both ends of signal cable to reveal about 40mm
(1.57in) of the wires inside.
b. Strip the insulation from the ends of the wires.
c. Using wire crimper, crimp u-type lugs on the ends of the wires.
64
Rated current of
AWG
18
16
> 6 and ≤ 10
14
> 10 and ≤ 16
12
> 16 and ≤ 25
10
> 25 and ≤ 32
> 32 and ≤ 40
Other regions
Nominal cross-
appliance (A)
sectional area (mm²)
> 3 and ≤ 6
SPLIT 1X1
IX21D5
0,75
1
1,5
2,5
4
6
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