A/A DC INVERTER U-MATCH AIR CONDITIONERS INSTALLATION
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connection according to the schematic diagram.
The air-conditioning unit shall have special power supply line which shall be equipped with electricity leakage
switch and air switch, so as to deal with overload conditions.
The air-conditioning unit must have grounding to avoid hazard owing to insulation failure.
All fitting lines must use crimp terminals or single wire. If multiple twisted wires are connected to terminal board,
arc may arise.
All line connections must conform to the schematic diagram of lines. Wrong connection may cause abnormal
operation or damage of the air-conditioning unit.
Do not let any cable contact the refrigerant pipe, the compressor and moving parts such as fan.
Do not change the internal line connections inside the air-conditioning unit. The manufacturer shall not be
liable for any loss or abnormal operation arising from wrong line connections.
4.1.3 Power Cable Connection
1) Air-conditioning unit with single-phase power supply
①
Remove the front-side panel of the outdoor unit.
②
Pass the cable though rubber ring.
③
Connect the power supply cable to the “L, N” terminals and the grounding screw.
④
Use cable fastener to bundle and fix the cable.
2) Air-conditioning unit with 3-phase power supply
①
Remove the front-side panel of the outdoor unit.
②
Attach rubber ring to the cable-cross hole of the outdoor unit.
③
Pass the cable though rubber ring.
④
Connect the power cable to the terminal and earthing screws marked “L1, L2, L3 & N”.
⑤
Use cable fastener to bundle and fix the cable.
Caution:
For air-conditioner with auxiliary heater, it is required to connect the power cable to the “L1, L2 L3”terminals
and the grounding screw.
4.1.4 Connection of Signal Line of Wire Controller
Caution:
Take great care when carrying out the following connections, so as to avoid malfunction of the
air-conditioning unit because of electromagnetic interference.
The signal line of the wire controller must be separated from the power line and the connecting line between
the indoor unit and the outdoor unit.
In case the unit is installed in a place vulnerable by electromagnetic interference, it is better to use shielded
cable or double-twisted cable as the signal line of the wire controller.
Open the cover of the electric box of the indoor unit.
Pull the signal cable of the wire controller through the rubber ring.
Plug the signal line of the wire controller onto the 4-bit pin socket at the circuit board of the indoor unit.
Use cable fastener to bundle and fix the signal cable of the wire controller.
