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INSTALLATION INSTRUCTIONS
Step 6: Connect the Signal Cable
The signal cable enables communication between the indoor and outdoor units. You must fi rst choose the
right cable size before preparing it for connection.
Cable types:
• Indoor Power Cable (if applicable): H05W-F or H05V2V2-F
• Outdoor Power Cable: H07RN-F
• Signal Cable: H07RN-F
CHOOSE THE RIGHT SIZE CABLE
The size of the power supply cable, signal cable, fuse and
switch needed is determined by the maximum current in the unit.
The maximum current is indicated on the rating plate located on
the side panel of the unit. Refer to this rating plate to choose the
right cable, fuse and switch.
Take Note of Fuse Specifi cations
The air conditioner circuit board (PCB) is designed with a fuse to provide over current protection. The
specifi cations of the fuse are printed on the circuit board, such as: T3.15A/250VAC, T5A/250VAC, etc.
1. Prepare the cable for connection:
a. Using wire strippers, strip the rubber jacket from both ends of the signal cable to reveal
about 40 mm (1.57 in) 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.
2. Open the front panel of the indoor unit.
3. Using a screwdriver, open the wire box cover on the right side of the unit. This will reveal the terminal
block.
The wiring diagram is
located on the inside of
the wire cover on the
indoor unit.
4. Unscrew the cable clamp below the terminal block and place it to the side.
5. Facing the back of the unit, remove the plastic panel on the bottom left-hand side.
6. Feed the signal wire through this slot, from the back of the unit to the front.
7. Facing the front of the unit, match the wire colours with the labels on the terminal block, connect the u-lug
and fi rmly screw each wire to its corresponding terminal.
8. After checking to make sure every connection is secure, use the cable clamp to fasten the signal cable to
the unit. Screw the cable clamp down tightly.
9. Replace the wire cover on the front of the unit and the plastic panel on the back.
Minimum Cross Sectional Area of
Appliance Amps (A)
14
Power and Signal Cables
10
13
18
25
30
Note: Pay attention to the live
wire. While crimping wires,
make sure to distinguish the Live
("L") Wire and other wires.
AWG
18
16
14
12
10
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