Schematic diagram of line connection Step 1: Remove the cover of the compressor, insert the compressor connecting line into the cover until the black square rubber is completely embedded in the cover, and then cover the corresponding hole of the compressor.Step 2: Plug the evaporator connecting wire of the control panel into the evaporator extension wire. The color of the wire at the other end of the evaporator extension wire is connected to the evaporator. The green wire is connected to the green wire, the red wire is connected to the red wire, and the black wire is connected to the screw on the back of the evaporator. The yellow wire does not need to be connected.Step 3: Wrap the compressor overheat sensing wire of the control panel around the compressor.Step 4: Connect the drying bottle connecting line of the control panel to the pressure valve of the drying bottle.Step 5: Connect both sides of the drying bottle with the BH8 high-pressure hose. Connect the end with the IN mark on the drying bottle to the elbow joint of the condenser and the other end to the expansion valve of the evaporator.Step 6: Plug the fan connecting cable of the control panel into the fan extension cable, and plug the fan extension cable into the fan.Step 7: The power cord of the control panel is relatively short when leaving the factory. If the distance is not long enough, you can directly replace it with an extended power cord. (The kit is provided with an extended power cord)Step 8: Connect the high and low pressure interfaces of the compressor. Blue L port, use the aluminum connector of L, and then connect to the evaporator interface with BH13 low pressure hose. Red H port, use the aluminum connector of H, and then use the hose of BH10.5 to connect to the other interface of the condenser. After all the above steps are completed, vacuum, add refrigerant R134a/600g, and then connect the power supply. Do not open the air conditioner without adding refrigerant, or the compressor will be damaged. If there is a fault, please do not worry. It indicates which step of the installation step has a problem. There is a flashing light on the panel. You can confirm the fault according to the panel fault picture above. Such as insufficient voltage, insufficient refrigerant, excessive refrigerant and high pressure.If you do not understand anything, you can consult us at any time. Fault light flashing Led blinking： Blinking 1 times, pause 1 second: Standby mode. Fast blinking 2 times, pause 1 second: Excessive current. Fast blinking 3 times, pause 1 second: Locked rotor protection. Fast blinking 4 times, pause 1 second: Undervoltage protection. Fast blinking 6 times, pause 1 second: Electric fan fault. Fast blinking 7 times, pause 1 second: Motor lack of phase. Please check if the motor got burnt and connection is correct or not. Fast blinking 8 times, pause 1 second: Compressor over heated protection. Fast blinking 9 times, pause 1 second: Pressure switch protection.